Are GT40P Heads Worth The Hassle? Good Bang For The Buck? Lets Find Out. Review And Ride Along..
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- čas přidán 27. 08. 2024
- The infamous Gt40P Heads. I've read countless facebook posts on the subject. They get as much praise as they do hate. Here is my 2 cents on these heads..
GT40p is an awesome upgrade. What’s not to like about the best flowing Ford factory small block head. A few carbide bits and some elbow grease and you clean up the exhaust ports for some extra ponies.
On the spark plug wires, I used chevy 90 degree boot plug wires. Taylor 64628. Perfect fit with plenty of clearance. Look exactly the same as the ford designed Taylor wires, just a different boot angle. Say what you want about using chevy on a ford but I needed new wires and that was the easiest route with best outcome.
Do what works.
Thats what hotrodding is.
My most cherished project car is my parents Plymouth minivan i inherited when my dad died. Stroked dodge challenger V6 engine, Whipple 100ax supercharger, Ford GT500 intercooler, Jeep I6 ignition/fuel timing, Audi V6 ignition system, Chevy S10 LS swap radiator.
The transmission was put together with parts out of 7 different year, makes, and models of transmissions to upgrade it. The suspension and brakes are all from a different body style van. I have a set of Lincoln Aviator brakes i need to swap on....
I bought some freshened Factory Stock prepped GT40P heads from a racer about 15 years ago and they made as much power as TW170 or AFR165 heads. They are STILL on the car and running strong as ever.
I ran pure street back in the day. I was always amazed what those factory stock guys were doing with the rule set.
They just simply dont. Theyre the best factory sbf head, but thats not saying anything, compare to a mopar or chevy head. Vortech had light years compared the the p head. A competition head porter can get about 245 cfm out of them and they flow really well at low lift due to being so small, but they wont compare to a larger / better cylinder head.
@@doxnoogle5782 I had GT40p heads with bowl blend/valve job.1.9int/1.54ex valves on a 306 with tfs1 cam and 1.7 roller rockers.Made 313rwhp with 4.10 gears ant tko600 trans.Spent over 2k switching to tfs 170 aluminum heads and made 326rwhp.Gained a whopping 13hp.I was so pissed
@@doxnoogle5782 Best factory Ford Small block head that out that flowed Mopar and Chevy by a Mile,The Canted valve Cleveland 4v bigport Cylinder head which were also used on the Boss 302's.I always laugh how these heads are conveniently left out of the Small block Ford talk. by Chevy and Mopar lovers.That saying there are some very good aftermarket heads out out for Ford five o's but i like the Cleveland head design.
You brought up C heads for why exactly? They may be the best sbf FACTORY head, but the fact that they dont even make the power that chinese castings do should say all that needs to be said. They outflowed mopar and GM in the 70s, definitely not by the 90s, well, GM anyway.
If you know how, you can make E7's flow like expensive aluminum heads. The P heads require less work, and you can do it with stock valves.
Whatever makes your car goes faster if the main goal is to go. Im broke as shit and been building my stang for over a decade. Got stock ported e7s and a bunch of hand me downs...I cant even afford a set of bare speedway aluminum heads, but it moves for what it is 😂
I put 300 rwhp and 340lb torque on the dyno with gt40 heads ported and polished with a b cam and a tune.
Good numbers.
I remember when that was all there was for a street guy. The Windsor jr and st heads were top of the line. Man trick flow and afr really changed everything. I used 3bar gt40s on my 351 daily. I should have went with enforcers, but I wanted Orm type reliability
Using GT40P heads with upgrade springs, easy to find spark wires with 90* boots, and BBK shorties have been no problem. Use a cut down sparkplug socket and a box end wrench to change the two plugs that are close to pipes...there ya go.
I have the gt40 3 bar heads on my 302 with the intake from explorer installed in a 84 datsun s12
I bought a set of shorty headers made for GT40P heads. Paid about a $100 more than nonGT40P headers and I don't have to many issues with My plugs and wires.
I couldn’t find any. Ended up using Mac shortys.
@@fox-body Mac made GT40P specific headers for Foxes & SN95's but they are out of business now.
Back in late 90s early 2000 when i was porting a set a week of gt40p heads in orlandobi had a customer splitting factory xxx blocks in a very well known ex goverment ford lx notch
AFR 165 for small block ford work real well.
Those are a good choice.
All the decent heads are on back order, I have been looking for real.
Ty for an honest real world analysis of these heads.
Around here you can’t find an explorer with less than 200k miles so they all need the valves done, springs, maybe some guides, etc… after all that you might as well buy aluminum heads. If you can find a low mile set for a couple hundred bucks might be worth it, but that seems more and more unlikely
The explorer I got mine off of had 240k, guides were all fine and valves sealed up with a lap job. About 300 bucks into the heads with trick flow springs
@@cnebuda7422 I have also used a half- dozen sets of heads off of 200K+ mile engines and also never had to touch guides.
@@cnebuda7422 that’s about what I have in mine.
You have to change the Explorer springs anyway, they aren't designed for high lift performance cams. They're no even really good for the stock H.O. cam.
Please video the rear seat delete you're going to make!!! Thanks for the videos!!!!
I like to deck the p heads .030 and a home port job
Yea I could see that making a difference. These I just did the springs and slapped them on.
I plan on doing this same combo! Just efi
have set of ford racing heads that were made for the gt40p heads
Awesome video, much appreciated. How do you feel about the non p heads like 93 cobra. Worth it? Or would it overall be easier to do a prefab kit like holley or tfs...thanks!
I don’t know much about them. I would say they would be easier to find headers.
About to do the same with GT40 (III bar)heads. Why did you shim the rockers? This will be my first build and was curious. Was that to help match the longer push rods you went with? Maybe I will see the same geometry issue when I measure the rocker contact to valve when I install. I will be running the n41 cam with explorer bottom, stock pistons, stock rockers. Thanks for the info.
Yes it was because I used longer push rods. I wasn’t getting enough preload with the stock pushrods. So I had to order pushrods that were a little to long. So shimming the rocker gave me the correct preload.
Hey what your Holley 600 dp set up jetting numbers etc.. I run the same set up except 3 bars instead of p heads thanks
If you change plugs every couple years, that's no big deal.
What do the Trick Flow springs add to the equation?
Reduces valve float, mid-high rpm stability.
Yea the springs on the explorers are really bad.
What time would you think it would run in1/4 mile
No clue. Maybe 13s high 12.
Short answer is NO.
No to whom about what?
That shifter looks right crisp
What gears are in the rear end ?
Stock 3.08. It’s out of the sn95 parts car I have.
@@fox-body are you going to do like a 3.55 or 3.73 ?