DOC HARLEY: M8 INTAKE MANIFOLDS UPGRADE
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- čas přidán 19. 08. 2020
- Doc Harley from the Service Clinic at Low Country Harley-Davidson to help you with the health of your motorcycle! This week talks about the Scream'n Eagle M8 aluminum manifold and the advantage of installing it Now!
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Doc Harley is a motorcycle technician at Low Country Harley-Davidson with over thirty years working on motorcycles. Over the years at the dealership he has worked on Harley-Davidson, Buell, and Triumph motorcycles with a few other brands here and there from trade-ins. There are thousands of how-to videos out on CZcams and other websites across the world. Doc’s goal is to help solve problems that people run into when using their service manual, share insights only found as a certified Harley® technician, and some of the tips he’s picked up over the years.
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Low Country Harley-Davidson, 4707 Dorchester Road, Charleston, SC 29405 - Auta a dopravní prostředky
I like that about the new manifold. Next time hold your phone sideways for a better picture
I am getting the stage III installed on my M8 in October. I just contacted my dealer and told him to add this to the build.
Thanks Doc! This is probably the most important upgrade for a M8.
Agree…..Doc
Excellent vid Doc.
I just luv your videos Doc!! U r simply amazing!! 👏👏👍👍Plz make more videos on M8 touring upgrades
Thank you. As they come available, I will share. ~ Doc
Thanks Doc.
On my 2020 FXST, the stock intake manifold started to leak before 10k miles. All the up to 14k miles, I had an exhaust pop on decel that kept getting worse and worse. Couldn't figure it out for the life of me. Finally checked the intake manifold, and boy was it leaking!
Can I add this now with my stage 1 or do you have to wait add with a stage 2 and up ???
I agree. The aluminum manifold should be stock. The plastic manifold on my 2019 Heritage 114 developed a crack at only 1500 miles resulting in an idle speed of nearly 2000 RPM. I was fully repaired under warranty. I’m not sure with the aluminum or just another plastic one. I should know this.
Would be great to see a video on swapping out the intake manifold.
@sowen74 Yes, it's a new video. Since I originally posted I've seen it and purchased the new S&S manifold. Thank you!
Thats a easy choice Doc👍🇬🇧
🎉🎉 I need and will do this next
Good Move….Doc
I also have the 55 mm intake manifold for a 19 road glide. Do you use the stock induction module?
You can. Or upgrade. Either way. More power if you upgrade.
can you use the 55mm aluminum intake with the stock ECU and no dyno calibration? granted I keep the stock cams, stock air filter, and stock exhaust system? Thanks.
Yes. Thanks ~ Doc
Hey Doc. I own a 2020 Breakout with 294 miles on it and I am concerned about a decrease in power and what has become an increasing loud front cylinder knock. Could this be related to the oil pressure not reaching the front pushrods/rockers? It has become so loud that its annoying.
Get that thing into your dealer don't seek advice in CZcams comments for a brand new bike that's what the warranty is for! Good luck.
Can I only installed the upgraded manifold and keep my existing Stage 1 parts???? Would my dealer needs to change the tuning on my SE Tuner? Thank you
Yes. You can switch manifolds. We have installed a few without modifying the mapping. Harley-Davidson does say it will preform 2-4% better and suggest tuning. But your ECM has the ability to adjust that much. The aluminum manifold is one of the best improvements for your Harley-Davidson. Thanks ~ Doc
Hi doc, great video. I'm a subscriber and watch you all the time. Quick question; is it possible to idle down a 2010 Road King fuel injected with a 96 CI engine on it? Thanks and keep up the good work.
Why? Twin cams need to idle at 1100 for optimum oil flow
Yes to a point. Factory Dealer Digital Tech computer has software that allows idle to be adjusted for throttle cable bikes 99-07. Min allowed is 952 Max 1200. Side Note: The slower you idle your Harley the slower the oil pump turns. Thanks ~ Doc
Thanks Doc. I appreciate the return.
Hey doc since you design many things for a lot of things how about a 3 4bbl intake for any v-8?
Sorry Mike my passion is for the two wheel world now….Doc
Hi Doc, great work, as always....do you think it's too big the 64 throttle body for a 114 with complete exaust and screamin eagle air filter ? thanks
There are a few performance packages that include the 64 but they usually include a cam or bigger jugs. Can you? yes but it would take some tuning whether you use stock injectors or the larger injectors....Doc
@@LowCountryHarleyDavidson thank you so much. i'll put the 64 with the stage 2 , torque cam , oil pump , cam plate by screamin eagle
I watch all your videos and love them all. I have a 2019 Road Glide Special with a stage 2 torque cam with 23,300 miles on it and the Compensator broke in 3 pieces. Is this a common problem again? My dealer says no but there seams to be a lot of posts with the same problem.
Search Kevin Baxter Harley Compensators. That will answer your question.
I have found on the net, bad news is posted more often than good news. Adding more power to any motor can find a weak part. The compensator in you bike is a good design. I have seen a M8 compensator part brake. Is it common? No. This part of the powertrain handles a lot of stress in daily driving and holds up in
a few performance competition venues. Until there is a PROVEN better-long lasting design. I will stay with HD. Thanks ~ Doc
Hello Doc,
I recently had the 55mm manifold installed on my 2020 FLTRK. I had the stage 2 torque cam, breather, exhaust and Harley-Davidson wide ban tuner auto tuner on top of the Harley-Davidson pro tuner. Bike runs good with the upgrades.
Should I also have it dyno tuned? I know the parameters are epa limited.
What do you recommend?
Thank you
You definitely need a dyna tune my friend
Your leaving power #s on the table not having it tuned.
I bought a 55mm S&S intake manifold.
Hi Doc, Thanks for the video. If I add the 55mm manifold to my stage 1, 2021twin cooled 114 do I also need this Hardware kit, induction module
91800058. Next week I am doing SE stage 2 power cam and stage 3 122 kit, is the 55mm manifold adequate? Thanks
In theory you should not need the Hardware kit but I always order it just in case. you never know if an o-ring will tear. As for using the Aluminium manifold with stock throttle body with the stage 3. Yes it will work. If you are a HP junkie then go with the larger SE throttle body kit. Personally I think the stage 3 is perfect for everyday fun.
@Low Country Harley-Davidson Thank you SO much for taking the time to answer my question. I felt the same way and bought the kit. I am a power junkie, my first Harley. I'll see how these stages feel and go from there. I love this bike! A little more kick and it's perfect. At my home office I often have your videos playing in the background. Reminds me of when I was a little kid reading Peterson's manuals, Car Craft and Hot Rod magazines. Your videos are GREAT!!!
Do you need a new map/calibration , or does my existing one adapt to the larger airflow? I have an engine conversion from 114-117 cui and a dyno map. I would like to take the S&S 55mm Manifold.
Or is the one from Screamin Eagle better? Which long hexagonal Allen key do I need to loosen the Manifold from the cylinders?
Normally when I build a 114-117 I install the SE Manifold so I am surprised your builder did not. Not knowing your combination changing the manifold could benifit from a Dyno check and possible tweaking. A 1/4 allen....Doc
@@LowCountryHarleyDavidson Thanks Doc👍
Hi, thanks for the answer to the previous question.
What do you think is it good idea to put same time a new set of next-level Harley-Davidson fuel injectors in the new manifold and do you have an idea of how that will affect fuel consumption?
P.s.
to the same topic - how often need to use cleaners for injectors and is it are differences what types of cleaners I use.?
Thank you
Best regards
Lini
First, I apologize. I receive so many questions I do not remember your first.
As for injectors. Larger injectors must be in future performance plans not just a substitute.
My observation and opinion. Most larger injectors have less number of holes but larger. I stay with stock with 6 holes and better pattern and efficiency as long as I can. The build will dictate what’s needed.
Do your research on cleaner. Be vigilant on the correct amount to use….Doc
@@LowCountryHarleyDavidson
By any chance, do you have some sort of videos about injectors, types, or maintenance and anything that could explain a "vacuum" in crankcase, asking just some brands have oil dipstick with the one way valve and some have just a hole - claiming that helps to engine stay cooler and it's breathing... M8 114 want to prevent getting oil in cylinder.
Thank you for your advice.
Regards
Lini
I have 18 FXLR with Reinhart mufflers and S&S air cleaner. I’m using SE tuner to keep warranty compliant. I have now a second intake leak since new. First time dealer replaced seals and said intake was good not warped. If I go to 55mm aluminum SE intake do I need another tune?
Any physical Change to motor can require a re-tune for optimum Performance. I would love your data of putting your bike on dyno before manifold change and after. So far Stock bikes changing manifold only are running fine...Doc
@@LowCountryHarleyDavidson Now I just got to find one the 55 mm SE or S&S Is impossible to find and is on back order all over
Hey doc, do you recommend using antiseize to install the intake flange bolts? Or is it recommended to install dry? Also is it smarter to stick to the oem steel bolts instead on stainless?
Intake bolts dry with a dab blue lock-tite. As for stainless. I have often wondered about this. A machinest said if using Stainless in Aluminium you must use a special lube....Doc
@@LowCountryHarleyDavidson Thank you, really appreciate you taking the time to answer Doc! Was having trouble finding reliable info on this. Have a great day & rest of the week.
2020 RGS with a Stage II, if I switch to this intake will I need to also upgrade the injectors?
No unless you are building a Stage 2 with aftermarket components….Doc
Thank You,
I'm keeping my 107 stock. Will this manifold work for me just because i want to get rid of the plastic one?
Yes….Doc
@@LowCountryHarleyDavidson thanks doc!
Any advantage to going with a PORTED 55mm S&S manifold over the stock aftermarket S&S 55mm?
If you are going with the 64mm Throttle body YES. Stock Throttle body with the SE Aluminium manifold is good enough. Remember the cookie is only as good as the ingredients. If you have the cam and heads that flow above stock then ported can help from S&S...Doc.
@@LowCountryHarleyDavidson Thanks Doc!
@@LowCountryHarleyDavidson Hi Doc , a question will the stock throttle body fit the 64mm manifold ?
Can I upgrade to the aluminum manifold and not have to tune the bike
According to Harley-Davidson no. But in my experience Yes...Doc
I want the 66 mm Kyle Wyman is now using. Lol
Love your videos. If you turn your phone horizontally, your videos won't suffer from VVS (Vertical Video Syndrome) on CZcams.
Would've been nice if the SE aluminum throttle body was polished on the inside.
Then you would have nothing to do 😆….Doc
@@LowCountryHarleyDavidson I just got one for my Fatboy 114. Should I polish the inside with a very fine sanding paper?
Doc, I just talked to my dealership.... they said that with the aluminum intake it will drastically drop my base mileage. I can see a little bit of a drop but he reiterated that it would be a drastic drop... what say you?
Russ, I dyno tune and build Harley engines for a living, your dealership is what we in the business call a Boutique Shop. Buy your bike there, your wife/girlfriend a nice pair of boots, but find yourself a Independent Performance Shop for your upgrades. Try and find one that has a Race Bike or two whether it's Drag, Road, Hill climb, or Bonneville, etc. You're getting false, and unsubstantiated information from your current dealership. Good luck Sir. SARGE.
This is news to me. We are all learning on what makes the best combinations. I have read all good with this aluminum manifold exchange. I would like to see his data. Maybe on some application this could be true? The SE Manifold has only been out this year. Could be the need for more data. This is a performance part. I am under the belief it could only improve the current motor. Thanks ~ Doc
Sounds like you should find a different dealership to service your bike...
The injectors are the same it’s sucking more air that’s not going to drop your mileage
Which one would i chose... Triumph Rocket 3.
Aluminum one from screaming eagle all the way
Intake like this may not work well but just imagine when you open the hood how you would freak out other people?
Mike I believe it works really well and sad owners can’t show it off after installed and enjoy the “Hood open” thrill👍…Doc
This has been known for decades. Reputable head porters will ask for your intake so they can work on them. No big secret in the racing world
Harley listen up.... for the price you ask we shouldn't have to step up or upgrade from a plastic to aluminum intake manifold.
No kidding...plastic has no place in an engine, that's why I changed out the plastic tappet cuffs for billet S&S pieces when I did my cam swap
@@kingkrimson8771 Most modern engines use plastic intake manifolds... this is extremely common in motorcycles, cars, etc...
LOOKS LIKE ALMOST EVERYTHING NEEDS to BE UPGRADED😒🤔WHAT a GREAT DEAL, AFTER SPENDING ALL that MONEY.
Yes mate we have been sucked in for yrs Harley have been found out just take a look at them now
@@davedave1019 10 YEARS FROM NOW, they WILL NO LONGER EXIST . ELECTRIC HARLEY ? REALLY
True that!! From my research, its just the crank case in the entire bike that does not require an upgrade (unless someone wants to go with the 131 motor!!!!)😂😂😭😭
None of these parts NEED to be upgraded... your comment is nonsense
You get most and sometimes more Back when you go to sell it.
This is what's wrong, the aluminum should be used on all the parts, stock out of the factory. Harley wonders why sales are down, well this is a good example almost everything can be and probably should be upgraded, of course for a price on top of the premium you paid initially for the bike. I have Harleys but not going to spend a fortune upgrading, I would buy a used bike with the extras before buying new.
why update everything on a harley m8 junk i ve been riding for year s building junk i keep my old harley i was going to buy a new one
Too judgmental. Every year and model could and can be improved as parts improve…..Doc
Another Harley Davidson money making strategy. Why does just about everything require upgrading? (rhetorical question, we all know the answer). I suggest that just about everyone looks for more power and would pay a little more at time of purchase instead of having to fork out the bigger bucks with an after market upgrade.
Nothing REQUIRES upgrading... these are recommended for Stage 3 or Stage 4 upgrades and the reason people are doing this on say a Stage 1 or 2 and why Doc made this video is because for $189 this is a very inexpensive bolt on warranty compliant component. Nobody NEEDS to replace the OEM intake manifold on stock bikes, Harley or otherwise...
Per your logic, why isn’t every Camaro a ZL1 and every Mustang a Shelby Cobra??? Geez….🤦♂️
Now these are the thing's that piss me off about Harley. Why in the world would they build bikes with plastic intake manifolds??!! Heat is a killer!! Wtf over?
It's heat proof idiot, it would melt at day one if it doesn't
Gusdhe Sewana it is not extreme heat proof. Does not melt but distort s at the heads.
My Ram diesel has a plastic intake. Just saying!
Cause their overpriced pieces of shit.
@@larrys.3992 and its water cooled, right??
$35,000 motorcycles with plastic intake manifolds. What a joke.
SCREAMIN' EAGLE EXTREME FLOW 55MM INTAKE MANIFOLD
This Screamin' Eagle 55mm Extreme-Flow Intake Manifold features enhanced geometry and hand polished intake runners to provide uninhibited airflow to the engine resulting in a 2%-4% increase in horsepower that you can feel. The cast-aluminum construction of this intake manifold withstands sustained high engine temperatures for reliability even under the harshest riding conditions. This Manifold fits stock throttle body and all Screamin' eagle intake kits. Works well with with all current Screamin' Eagle Pro Street Tuner calibrations.
Fits 18-later Softail and 17-later Touring and trike models.
#27300167 $189.95
Why not also buy the extreme flow throttle body?
Thanks Doc.