WHAT WORKS BETTER, V6 OR INLINE 6? 3800 V6 VS 4200 ATLAS
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- čas přidán 6. 09. 2024
- BOOST VS NA EFFICIENCY! WHO WINS? SUPERCHARGED 3800 VS ATLAS 4200. THEN WE ADD THE TURBO! WHICH OTHER GUYS JUNKYARD COMBO WORKS BETTER, THE SUPERCHARGED 3800 SERIES 3 V6 OR THE LARGER, NATURALLY ASPIRATED, DOHC ATLAS 4200 INLINE 6 CYLINDER? CHECK OUT THIS COMPARISON BOTH STOCK AND AFTER WE ADDED ADDITIONAL BOOST FROM A SINGLE TURBO? HOW DOES THE COMPOUND TURBO/SUPERCHARGER ON THE 3800 COMPARE TO JUST THE TURBO ON THE MORE EFFICIENT 4200 AMERI-BARRA?
Twin gt-35 on my Ford Super Coupe...... you just convinced me.....
Very cool
The 4200 was never meant to replace the 3800 , hence the reason why you never saw the 4200 in a car application and vice versa. But decent compare nonetheless
I6 are long.
Having experience with the Barra and the L67 down here I'd love to get my hands on an Atlas to play with! 👍🇭🇲
Good deal on the 2005! Can't wait to get my tune🥰👍🏿
My 3800 Firebird is about to be insane
I love your vids , I’ve learnt so much . A better comparison will be , between between the Ameribarra and the Aussie Barra ! Can’t wait !!! Street machine carnage on utube is build the Aussie version of the 3.8 . They just dropped their latest today ! Look em up ?
Would of been nice to see what the 3800 did with just the turbo as that supercharger must be using 80-90hp at 12psi
We will eventually get to see it with just a turbo. You'll see how well it responses to boost. Dan Jost was running a series 2 in his Grand National, he had a Borgwarner turbo and he was making about 700whp. In this instance his 3800 was paired with a built 4L80. Unfortunately the company that built his 3800 hammered the main caps on, instead of installing them correctly and main cap 3 broke I believe or something along those lines. I believe he said he was running about 20 psi of boost in that setup. Instead of buying another 3800 and rebuilding it himself, he instead bought an LV3 4.3L v6. He then bought a Holley High Ram intake and modified it to fit the heads of the LV3, so he could run port injection. For some reason he replaced the heads with new ones from GM parts direct and they were not very expensive. These heads flow more out of the box then aftermarket performance heads for the 3.8L found in the Grand National. They actually flow a little or are on par with Buick Motor Sports fully ported Stage II heads. Dan got his 4.3L running and I believe he said he was making the same wheel hp as with the 3800, but he's only running about 9 or 10 lbs of boost. I was impressed with LV3 heads, that I ordered a pair from GM parts direct and I only paid $168 for the set.
With the right bits 1500hp at the fly. Already cars doing it.
@Azu Za’s being smaller doesn't mean it uses less energy to drive it m90s are very inefficient modern chargers have come on leaps and bound since the m90 was designed
This is an apples to avocados comparison. The displacements are not close. One is overhead cam, the other is pushrod. The packaging is vastly different.
The 3800SC is a decent small package that makes good torque for its size, but the supercharger is just holding it back from its true potential. The inline 6 is a better configuration but harder to get into small engine compartments, and its true potential hasn't really been explored. They're both interesting, but really not comparable in any way, other than they both have 6 cylinders.
I agree with others that the last generation 4.3L v6 would be a lot closer of a comparison. At least the displacement is similar.
The biggest advantage I see for the 3800 is that it is a small and fairly light package that has a ton of availability. The LS completely stole its thunder, because most people would prefer an 8 to a 6. Plus, it just sounds UGLY. I'm a fan of the 3800 over the LS, but I can even understand why everyone chooses an LS truck motor for their builds... cheap, v8 horsepower with an unlimited aftermarket.
In Australia we remove the supercharger and use the n/a manifold . These engines due to their heavy rods and low compression are capable of 600+ rwhp in stock form
With a turbo
@@chrishamilton5089 or spray! Ive even seen some twin screw stuff!
That's what a lot of Fiero guys do, too. There are several Fieros in the 9's and 10's (quarter mile time) using a 3800SC with a turbo conversion.
Hopefully Richard goes turbo on this and really pushes it . There are a lot of people over here that would like to know the limits of the factory internals
The 4200 has more cubes and effectively decades of technology that the 3800 doesn't. The gains are almost miraculous. Any more I'd think something like a 3.6 "high value" engine would be a better choice to compare against honestly.
What about the other 3.8? The Chevrolet 3.8.....
Clearly the answer is to add a supercharger and turbo to the 4200!
Wouldnt make a diff
That 4200 is a beast!!!!! Wish they made an easy install kit for the XJ Jeeps.
I got an Xj with a small block 350 in it. It’s a blast.
@@AndrewSosa Don't get me wrong, I like my 4.0 but it can't beat the torque your 350 probably makes. Very nice, Bro.
That in-line six just sounds so much better in my opinion
Both sound better than DOHC V6’s. DOHC V6 sound too much like modded four banger. My opinion.
I'd love to see the DOHC 3400 engine in the z34 under boost please.
me too-twin dual cam
should have thrown the ol 4.3 in there
the v6 has less internal friction
I would really like to see a late model aluminum 4.3 thrown into the mix. I don’t know if any of the available PCMs can control the direct injection but I understand that they have much better heads than the old 4.3.
By far. The LV3 makes as much power naturally aspirated as the old 4.3 made turbocharged in the Syclone/Typhoon.
I believe the terminator x can has some option for doing the DI lt motors but I don't know if it's a different unit or what but I think Richard ran one of the LT with a stock computer before
@@james10739 He's done some great tests with the Gen V 5.3L.
@@andyharman3022 ya that was the LT I was talking about
They have the same port and intake layout as the 5.3l L83. With an agressive camshaft and longtubes they would clear 400hp. They make lots of everything and weigh more than 100lbs less than an iron 4.3
4200cc= 258 cu in
3800cc= 233 cu in
That inline 6 has 24+ cubic inches on the V 6. Apples to Oranges
we said it was bigger-that was one of the upgrade GM made
Atlas by a mile.
Or three.
But keep in mind, the 3800 was 1980's thinking, throwing boost at an ancient engine platform.
Ya if they had redesigned the heads like the vortech in the late 90 and aluminum would have been cool
80s that evolved from the 60s
The 3800 is more like a 1950s idea. The first year of production was 1962. I am really sure that the valve angles and head bolt pattern are the same as the 225. When they went to the series ii with roller cam they should have made a proper head that isnt complete garbage.
The 4.2 is dohc with variable valve timing. Its basically like a Toyota 2jzgte but larger. Plus its 4 valve per cylinder. 4.2 way better motor.
Will the 4.2 bottom end handle an 8 secon 1/4?
@@DarkLinkAD Probably. Nivlac57/Calvin (who has been helping Richard with 4200 tuning and testing) has a 4200 in a Ford Fairmont that runs 9s, and apparently that's at conservative/safe power levels
@@DarkLinkAD I mean it's a poor question in a 1000lb car sure
@@james10739 What class you runnin a 1000lb car in?
@@DarkLinkAD ya exactly
Can you do the GM 3900 High Value as it makes similar power NA as the 4200. It has VVT. The heads flow better. It has Variable intake. And is a closer comparison in the V6 line to the Inline 6.
My '03 Trailblazer has a stock 4200. I drive the living shit out of it and the thing is bulletproof so far. I've done nothing to it but regular maintenance. Might have to tune and boost it some day.
I've heard the stock tune doesn't allow %100 power until around 3500rpm. I test drove a trailblazer yesterday and yeah felt pretty quick around 3500.
I hope you know you've just open the gates to Atlas swapping EVERYTHING import. lol
But I love it.
I doubt this will be the case. The atlas is a huge engine, both in legnth and depth.
Right atlas swap a Supra
I was considering Atlas swapping my BMW... until I took some measurements. It would probably require chassis mods and a hood scoop.
@@michaelblacktree you know it wasn't gonna be cake. That ATLAS it's a beast dimensionally.
@@calebperry7288 Oh that's a shame, I have not seen it in person yet.
Richard you should test the 3800 Camaro intake on this engine for N/A number comparisons. Then add the turbo and a cam.
Poor V6, the redheaded stepchild of the automotive world. It's either offset crankpins or balance shafts. It gets no respect.
Six in a row makes her go!
Inline 6>v6
I think once you start getting above the 600 whp territory the 3800 is really going to shine. Rumor has it the Atlas block isn't very strong and there's way less aftermarket for the Atlas. The 3800 has a lot that can be done to it with just off the shelf parts.
Would love to see how each pans out in a big bang test!
4200 has an Aluminum block 😔
@@WebNstyne So do Kseries hondas, and Nissan v-6. They can handle huge amounts.
I'll bet that the I6 is stronger than most v6s one example is the crank on most v6 have 4 main caps but a I6 has 7 main caps.
@@corporalpunishment1133 nilvac is making almost 1k with his 4200
Am I the only one who wants to see compounds hanging off the side of a 4.2? Like a HX25 size turbo over a GT45. Get instant response everywhere in the rpm range. Maybe a flat torque curve from 2500-6500+ rpm. 650+ hp/900+ torque with boost, ARP bolts and studs and a forged assembly?
The 4.2 design kinda reminds me of a electronic gasser version of the OM606... so it should definitely see high HP/ TQ ratios
The hx25 is TINY. Like really stupid small. Even a twinscroll gt3788 would spool at sub2000 rpm on the 4200 and they can have variable vanes. You wont get 650hp through them. Why do you want to make 900ftlbs of torque with an engine that makes peak power at 6000rpm? Thats 1000hp type numbers. There are better candidates for your project, diesels mostly but a forged ford 300 is way more in line.
History of Australia.
Not that long ago, large groups of Australians would undergo a pilgrimage to a place called "Mt Panorama" to watch a thing called "The race".
While in this holy of holy places large amounts of ritual alcohol would be consumed by the disciples of Ford and Holden(GM).
Due to the followers believing in different Gods and the large amount of heavenly ale being drunk sometimes punches , bruises, headaches, and large fines
would occur.
Even though things are different today to associate Barra with GM at the hill, would be an extreme blasphemy.
:)
have a good one.
The problem with both is the issue of packaging and intended usage, regardless of how much power you can squeeze out of them.
Unless you are keeping the 3800 in the car it came with, you are likely stuck using it in another FWD vehicle, and stuck with the AT it came with. Richard really had to dig to find a manual transmission bell housing to mount the 3800 on the dyno, so transplanting it into a RWD vehicle will be difficult if you want a manual.
Now Richard has already started that the 4200 is a very long and tall engine, so that has to be taken into consideration. In answering a question to me, the 4200 bellhousing bolt pattern is not compatible with the typical Chevy SB pattern, so without an adapter, you'd have to use the transmission out of the vehicle it came with, which probably isn't capable to handle the power of a high boost 4200.
But I still think it would be a fun swap in a 1967-1972 or squarebody pickup.
The 3800 bolts up the 4L60, which can be built to handle some power. The person who helped Richard get the 3800 up and running with the Holley, Brian Pryes swapped the 3800 series 3 and a built 4L60 into his 1987 Regal T. Running a Precision 6466 turbo, at about 18psi and I believe his car is putting down about 700whp. Don't get me wrong, I think the Atlas is pretty bad ass and I am thinking that I am going to go to boneyard and get one. Just to have one, like the LC9 aluminum 5.3L I have setting in my garage.
the 3800 bolts right to a 3.8l Camaro/Firebird rdw bellhousing-that's what we have on the dyno
Like Richard mentioned, the F-Body used the 3800 V6. The F-Bodies also used the 2.8 / 3.1 / 3.4 V6 for many years. And they have the same bellhousing bolt pattern. So basically, any 3rd or 4th gen F-Body with a V6 will have a RWD transmission you can use.
I'm Mopar fanatic and would love to see a comparison of the 3.8l dodge v6 to other v6s of that era! The ports on the 3.8 look like they would respond well to a lil boosty boost!
The supercharged 3.8 was so slow and under powered it was a joke even with every bolt on.turbo they can be fast but anything turbo can be fast
It's the supercharged 3.8, which with bolt ons can run 11s fairly easily, even with the slush box 4 speed and boat of a vehicle
I wonder if the atlas/vortec 2900 inline 4 could also out perform a 3800 v6 that would be something
thankyou, we never got any of these engines in the UK , but doesnt subtract from the details that can be got!
You got something much better on the Ford Duratech 3.0L V6 DOHC on the Mondeo and Jaguar X-Type (just one example). That thing would probably put stupid numbers with the same amount of boost just for having a much better flowing cylinder head than the Buick.
But I get it, it's human nature to be curious about what we don't have or can't have for x reasons.
Richard got you covered on this one.
@@GIGABACHI my favourite under rated 6 is the jaguar aj6/aj16. Owned a few and desperate to turbocharge one, one day lol
@@denisohbrien Ohhh, that's another beast waiting to have it's potential tapped.
no one calls it an Amer-Barra if I remember correctly the 4.2 is huge! and its overall weight is more than the 3800. I think the real question is what is the cheapest most effective way to make the most horsepower out of each of these engines. The 4.2 had a limited production run, but the 3800 ran deep into the 2000's they are literally everywhere
It’s overall weight is not heavier than a 3800. It’s just physically larger. I’ve got both😂 the 3800 is a heavy ass lump of iron
@@zerohourdrift What does the 4200 weigh dressed (ready to run) ?
@@danielcarroll5667 I don’t know the exact weight I just know it was easier to move the hoist and stands around with the i6 than the 3800😂
There are more 4200's than s/c 3800's in any given junkyard.
It's worth noting that all that sweet streetable torque in the compound 3800 is coming at much, much lower boost levels than the peak of 23+psi. Those >15psi boost numbers are only in the last 1000 or so RPM. The 3800 is tripping on the stock cam and spiking pressures because of it. Those boost pressures are going to come way down with a new cam, with little loss down low, while the 4200 would have to move the torque curve even higher to a less drivable zone with the equivalent can.
Now an M114 or TVS 1900 on the 4200...
Try a northstar motor! I know alot of people hate em, they're kind of issue prone, BUT me and my buddy put a 100 shot of nos on his, and it ran its ass off lol!!! We beat alot of cars youve never expect a 4 door caddy would beat on the street😂 it was awesome and ran well ! Really liked the nos, responded amazingly!!!!
Put a smaller turbo on the Atlas and then feed it with that bigger GT40 turbo. Bet it goes close to 700 HP. You'd gain bottom end with the smaller turbo like the 3.8's supercharger does and then the compounding factor will make the 4200 a monster.
For comparison to the 3800, Could you run a smaller turbo on the 4200 to get more low rpm response and run higher boost psi to achieve the same peak hp as in this video? How would that compare with the 3800 low rpm torque from the super turbo combo?
Whoever has the best airflow wins. After that it's reliability and harmonic control.
Straight 6 has better harmonic control than a 90 degree V6 plus a non staggered pin crankshaft.
7 main bearings vs. 4
3.8 all day. Very simple motor to work on. Fits in anything. Cheap. Lots lots lots of aftermarket parts.
But sounds like ass
I know Jeremy at FasterProm ported a Atlas cylinder head for you Richard. I want to see that cylinder head on the dyno before turbo and after turbo.
It wasn't for him it was for another guy that already did a boosted one in a car and Richard was going to get it to test it but I think that fell thru
Jeremy mentioned in a video that head won't be going to Richard. I don't know the whole story, but IIRC Calvin (Nivlac57) sent the head to Fasterproms for porting, and then it was supposed to go to Richard for testing, and then it would go back to Calvin. But when George left Fasterproms, Jeremy decided to just send the head back to Calvin. I'm not sure why Jeremy did that.
@@michaelblacktree so is FasterProm still on CZcams? Because I'm subscribed and haven't received any notification of new video's
Yes, and they're still making videos. Actually, they just released a new video a couple hours ago.
the head was Calvin's-he has it
The compact dimensions of the V6 can be useful
Like fitting into stuff that isn't the size of a Peterbuilt.
like putting it in a fiero
I second the newer 4.3 or even the 3.6 from GM plus adding boost
Hopefully Richard will get a hold of a 4.3L. The problem is, they are not in the boneyard yet. I go to my local junkyard every couple of weeks and I have yet to see a 4.3L. Come to think of it, I don't recall seeing a 3.6L either. If Richard does get a hold of the 4.3L, he'll have to get a modified intake or try and run direct injection. Do a Google search on Dan Jost, he has successfully turbo charged the 4.3 and it is in his Grand National. However, he isn't running it at the drag strip it is an autocross beast. He is running a Borgwarner turbo, about 10 psi, non intercooled on E85. Pretty sweet setup. He posted a bunch of pictures on FB of the build. Check it out.
we plan to try a LV3 with Brian Tooley
@@richardholdener1727 That will be awesome. As you see I have really come to life with the other guys motor. It's all thanks to getting a ride in an 87 Grand National in the summer of 88. Cousin was riding with his dad in their 87 vette and I was riding shotgun in the GN. That vette got spanked time and time again. Then in 91 while living FL I met a guy with a modified 87 GN. As modified as they could get at that time and we were driving around spanking a bunch of classic muscle cars, as well as the vettes and stangs. One night we pulled up next to this little pickup truck and I thought it was a Sonoma. After getting taken off the line a few, GN driver said that's a Syclone. I said what? He said a Syclone, I heard they were fast but not that damn fast off the line.
@Richard Holdener the GM "LZ9" 3.9L OHV V6 would be a good one to test. The 3800's bellhousing will work.
I keep pushing richard to do the high value v6. The 3.5 has the same heads and architecture and is really common.
Between the Atlas, the Buick, the 360's, and the 2.2/2.5 and new project car, I suspect Richard's hands are full testing for a while... not to mention that's he's probably completely out of storage space.
@@timothybayliss6680 the next stage beyond "in the junkyard" should be "already on the ground sitting in front of the car in the junkyard". And I see more LZ4/LZ9 engines already on the ground than s/c 3800's and 4200's. I wouldn't be surprised to see an LZ9 throw down 270+ crank hp. The pesky swaged lobe camshaft is really the only downside.
This also shows the 3800 supercharged biggest flaws, it's the supercharger. Ditch it and run just a turbo with either a cast, custom made intake or jerry rig it and take the turbines out and run it off your turbo as the inlet after all it already fits and don't have to worry about running the fan belt to it either. 1 down side to this is that you lose the low end torque but you gain a lot of power from 3100ish range to 7kish. Also curious if you could run a intercooler for even colder temps to boost it up even more.
we ran a cooler between the turbo and blower
A lot do is top swap. Basically 9.4 in 1 compression short block adding supercharger and heads application on top NA. Reason why do that. It responds better out of the hole taking off and better times on the track. Other reasons too. Be cool do top swap NA with supercharger and heads. Be very close to the 4200 power. I think anyway.
L36 rods won't be as strong as the L67/L32 rods though.
You can also make up for the compression difference by adding 6.67% more boost to the lower compression engine by my math.
@@tuningwithstyx people been doing that for years. Series III rods are stronger. Powdered Titanium i think. It’s better little higher compression than low compression. Depends on the engine. 3800 work better top swap. Talk to ZZP. That’s for superchargers. Turbos probably better for low compression. But not too low though. Might bog out.
The 4200 sounds so much better too
3800 sounds much better with the RWD exhaust or the equal length manifolds, I've been told my 3800 sounds like a 2J by a few people!
@@tuningwithstyx v6 never sounds better than an inline! Inlines are smooth!
Did you ever consider opening the bypass valve on the 3.8 with the turbo after it's spooled up in order to reduce the parasitics loss from the supercharger under a load as well as reduce the amount of heat soak/ transfer from the supercharger rotors? I don't know if the bypass valve is a large enough orifice to make that work correctly or if it would create a restriction and hinder performance? Otherwise I would try spraying water methanol Pre- supercharger in order to increase the efficiency, drop intake temps, run more boost/ timing on pump gas, etc.
The misconception of parasitic loss of blower is common but it actually becomes neutral to positive as internal pressure rises and the rotors try to drive the engine thru the belt, Detroit used this characteristic in their diesels for decades and other manufacturers used energy recovery with an exhaust driven turbine to a gear drive successfully too if you wanted to google scania for example
What your doing, posting these videos... I love it! Don't stop!
Another comment mentioned Northstar engines and it got me thinking. I'm seriously considering getting a Fiero and doing an engine swap with either a Supercharged V6 3800 or a V8 Northstar engine. Both being the most compatible for a swap. Between the two I'm really curious which one responds best to modifications and overall performance. And thank you again for posting these vids. I love em!!
Now you just need to compare 3800 turbo only, and then you can test different UIM's as well.
Richard me and my whole Oldsmobile club has been waiting patiently on a Oldsmobile 455 build. Do you plan on doing a comparison on this engine with parts and combos?
I DON'T HAVE AND OLDS 455 MOTORS
@@richardholdener1727 shall I discuss with the boys on donating one?
@@richardholdener1727 in your opinion, would you say the Buick 455 you did have a very similar outcome on a Olds 455?
I know this is an older post, but I'm very curious about how the 4200 would respond to a ProCharger instead of turbo charging.
I'm just curious if the hp and torque would increase in the lower rpm range.
no-the centrifugal blower adds very little boost at lower engine speeds-you need a PD blower for that
It would be nice to see a comparison of the 3800 with GM’s replacement for it, the LFX (or newer LGX) since they are becoming popular engines for swapping.
Richard: If you'd talk more slowly, you'd be more likable and get more views.
I DOUBT THAT
I'm gonna go rogue and say 3700 Atlas. jk. Would be sweet to see what 10 psi (or 23.3 psi) in the 3700 I5 does compared to the same in 3800 v6.
I agree I'd like to see what the 5 cyl can do lol
Calvin was working on messing with the 5 cylinder architecture. I hope that's still in the plans with him.
Or the massive 2.9L straight 4, that's another untapped BEAST.
@@LowDollarDude sound amazing is one thing....
How does the 4200 compare in terms of durability compared to the 3800. THe 3800 and it's predecessor the 3.8 had a reputation as being bullet proof.
Hands down the ATLAS.
Psi per psi the 4V head will always have more potential for EVERYTHING and ANYTHING than that ancient 2V Buick Lump.
Although, it must be said that the Buick performed very well for being what it is. 👏
I can’t believe how flat the torque curve is on that Buick motor. They did a good job with that for the time period
@@headlesnorseman701 my thoughts exactly. 👌
Don't sleep on the 3800... in America everyone seems to think it's a slouch but take a look at what the aussies have done with that motor. There's a race team down under making well over 1k and running 7s. Those v6s are absolutely wicked and don't need a whole lot of $$$ to get there.
Great comparo.
I really want to see a big bang on both of these motors. I want to see them pushed to their limits, what breaks first. Are they like the LS where they just need a little ring gap and they can keep on chugging, on or do rods bend after a certain amount of boost and hp.
Boost is resistance to flow. So you are getting the same amount of power with much less resistance in the 4200. It’s not a great comparison using a compound on one and turbo only on the other. That turbo takes forever to spool up on the 4200. Can you imagine the 3800 trying to spool that? Get the correct size turbo and run it on both motors. That would be a good test.
Gt45 is a cheap popular ebay turbo. Its like 150 bucks ir somethin.
Did you put ring gap in that 4200? I have one in a trailblazer that just flipped 300k, still runs like new!!!
we did not change ring gap on either of these before the turbo tests
Hey Richard how about you do a cost comparison build of small & big chevy ford mopar 450hp & 750hp all retail prices
Hey Richard. Have you ever thought bout doing some test on the Ford 3.7 V6 Cyclone engine? Maybe something different to consider
Cant u turbo a na series 3 3800😮
yes-same as a l67 or l32
Its Called 4 valves Per cylinder Overhead Duel Overhead Cam the torque is Broader and the Crank is Longer It Also is a Different Segmenting on the cylinder Fire on a V there are 2 Cylinders firing at once the berra is completely different!
No cylinders fire at the same time, the rod journals are offset on the V6, to create an even firing order.
I blame the 3800's iron heads. 😛
Speaking of advancing technology, the engine that replaced the 3800SC is a 3.6 liter DOHC V6. The 3.6 V6 is naturally aspirated, but makes more power than the 3800SC.
Yup and they are junk
GM was gonna drop the 3800 back in 99. It was high popularity so they recontract it. Series III is a stronger 3800 engine. Mostly the rods much stronger. GM didn’t put much effort do more. Cause they know the contract date head of time. That’s probably why didn’t do much. If Series IV maybe 24v OHV lol. Two throttle body lol over 300hp. Lol
@@shadowopsairman1583 Please explain why you think that.
This was a completely b.s. test, what was the point?
The 3.8 was first used in 1962? It is ancient. They also die from a shit oiling system. I would not use one.
THAT IS A DIFFERENT ENGINE FAMILY
Man the atlas is impressive 👍
I’d be interested in seeing manifold inlet temperatures on the turbocharged 3800 after the blower. When compounding the supercharger you would see higher a boost pressure but if you’re heating the air past an acceptable level your actually going backwards in terms of air density.
the air going in at 7 psi after the ATW intercooler was likely not hot (given our previous testing with this turbo at that boost level)
I really wish engine builders at some point would have developed and aftermarket for the 4200s. They're everywhere. How cool would it be?
Rich made a point, he said they never came in any really cool cars... so maybe that's why it never caught on?
They would be wonderful engines with some aftermarket engineering put into them. GM stopped making them because of v8 being the king in most people's minds and I think the 4.8 vortec was cheaper to manufacture.
GM killed them off fairly quick, the LS had a longer production run along with the Buick 3800
Can you run the 3800 with same turbo but no eaton to compare boost response? Also would love to see a vortec 8.1 hit the 'other guys' rack.
Now you need to put a 6-71 on the atlas.
Personally I blame squirrels
I think once you remove the supercharger fins you're gonna have more air flow and volume
Weird comparison, I thought the 3.6 HFV6 was the supercharged 3800's direct replacement. Would be very interested to see what could be done with the LFX.
Lfx is an engineering marvel. But, I’m not convinced it isn’t made of ‘plastic’.
@@marcgucciardo1942 260k KMs on mine with nothing but general maintenance so far, runs great - it isn't winning any beauty contests though!
@@Carcenomy Good to know. I think most of the problems come from poor maintenance, low oil level and young people revving the ass out of them.
Correction, this is best Richard.
I'm just amazed that you can pick up a 4200, throw an inexpensive turbo on it and you have 550 HP.
Heck of a time to be a gearhead!
and then the 4300 that makes even more power with two valves and one cam...
but it made less
Is the I6 4200 crank stable enough for higher rpm?
Hi what is the 4.2 put in and what. Yrs
envoy and trail blazer-this was a 2005
Something about that 4200 just seems insanely cool to me , want to buy a clapped C4 & "Roadkill" one into it , or the 5 cylinder one , that would probably even make more People angry.........
If you saw where the steering rack is in a C4 Corvette, and how close the damper is to the rack, you'd probably change your mind.
@@Joshie2256 Must be just like my C5 , it sounds like (steering rack location) , had to completely remove all fasteners ,steering shaft connection , tie rod ends , fluid lines & electrical connections then shove it as far as possible out through one wheel well (passenger side ? I think) just to pull balancer to change cam , inline engine would have to be 2' above hood level or 2 cylinders into dashboard , but then , that would be kinda "Roadkill-ish" , wouldn't it ?
I do question the air intake temps and weather intercooling could level the playing field a small amount
Let's see a 3.6 lfx
The 3800 has a roots style charger. That should kill the 4200 below the rpm range you are showing. How much do you think the 4200s heads give it an advantage?
Variable cam timing as well. The 4200s torque curve is almost flat.
@@member5488 good point.
I wonder if a ls 4.3 v6 would respond like the v8s do
No such thing as a LS 262/4.3, L35, LU3 are SBC Vortec, LV3 is Gen 5 LT.
The latest all aluminum one ? I can't see why not.
so now you have to put the spare supercharger on the 4200 right after the turbo??? It's only fair..... 8-)
Atlas !
Atlas all day everyday. That said 3800 is one of best v6 engines ever made.
The 3800 is actually a pile of crap obsolete engine, the 3.6 v6 is a far superior and better engine that makes much more power.
May I introduce you to the toyota 4.0l v6?
@@mikeshultz1007 try The 4.2 LT motor in the new chevys if you're staying chevy.
@@mikeshultz1007 stock yes. 3800 can make way more power than 3.6. 3.6 not really a performance engine one thing. Not like the 3800. Highest record a 3800 FWD WHP 900. RWD 3800 over 1000whp. 3800 u can a lot performance parts like nothing.
@@mikeshultz1007 stock vs stock, sure the 3.6 is more powerful. More reliable though? Hell no lol. Can't really compare a performance built 3.6 because there's no market for performance parts for them.
You ever get your hands on the ported head for the atlas? I remember Fasterproms mentioned you in a video when they showed a ported atlas head
not yet
@@richardholdener1727 I keep watching hoping to see more mods done to with the atlas. That motor has always intrigued me.
👍💪
4200. What'd I win?
knowledge, bro
I have to ask, but what cars and years were these Atlas engines in? What trans bolt pattern does it have?
No idea for the trans bolt pattern. The engines came in chevy trailblazer and gmc/Buick flavors. Came stock with 4l60e and later models might have had 4l65e.
@@calebperry7288 that's good to know. Just wonder if the trans bolt pattern is the same as the 3800. The 3800 shared the same trans bolt patterns as the 60⁰ V6 counter parts(3100,3400), and there was a 4L60e behind some of the 3800 f-body cars that had automatics.
@@boosted0079 Just did a quick google search since I am just as curious. On wikipidia it states atlas engines had a completely custom bell housing specific to their engine family. (en.m.wikipedia.org/wiki/List_of_GM_bellhousing_patterns )
@@calebperry7288 gotcha. That at least confirms that there's 3 different 4L60e transmissions lol.
the atlas bell housing is specific-we used an adapter to mate it to a standard Chevy SBC/LS
It's like a grinning testicle on EVERY thumbnail.
Long tube intake 4200 for low speed power and 16 psi?
it has that already
I know 1 thing, the 4200 gets horrible gas mileage. They get the same mpg as a full size truck with a 4.8/5.3.
Hmm my experience has been different.
@@shadowopsairman1583 in the city I get 16-18mpg on the highway the most I've got was 24mpg and that was really trying to maximize it. In my old Silverado with a 4.8 I got the exact same mpg.
Thats what killed the Atlas. As soon as the gtm360 came with a Al 5.3 in them it showed how weak they are stock. There was a 6mph trap speed difference in the quarter between the 4.2 and 5.3. The 5.3l also came.with dod and vvt and would usually get just as good mileage. For the 2007 models, the 5.3l trailblazer was rated 11hp more, almost a rounding error, but was a half second quicker in the 1/4.
I didn't get a notification :/
dang
@@richardholdener1727 damn squirrels :(