Intake Manifold / Injectors
Thread Starter
|
Stellar HDF Member
Joined: Mar 2009
Posts: 2,454
Likes: 58
From: Graysville, AL
Intake Manifold / Injectors
Hello, after seeing the new SE 55mm intake manifold Harley released it's got me thinking. Would there be any benefit in upgrading to this and keeping the stock throttle body on a stage 2 bike? I have also seen a few people changing out injectors.
Road Warrior
Joined: Mar 2013
Posts: 1,923
Likes: 587
From: Alorton, Illinois
I have seen stock TB and heads do 130hp. Yes, it did have 5.5 SE injectors. No reason for different throttle body unless you plan on exceeding this.
It's a shame you have SE stage 4's out there making high 120 only.
It's a shame you have SE stage 4's out there making high 120 only.
Seasoned HDF Member
Joined: Jan 2008
Posts: 13,698
Likes: 11,492
From: State of Confusion
not clear whether you currently have a stage 2 or considering doing one? if already have and you're very satisfied with how it performs overall I'd be inclined to want to leave well enough alone..if you're beginning the upgrade process are you considering SE or aftermarket? if the former probably just do the kit as prescribed, if the latter probably want to tap into the knowledge, expertise and experience of the product experts here and work with them on a proven package that compliments your intended use, riding style, goals and objectives
Banned
Joined: Jan 2019
Posts: 3,036
Likes: 1,013
From: Nunya.
We will get a little more from the new SE 55mm intake manifold but how much I don't know . The Mothership free Enterprise believes there's a bottleneck at the inlet manifold and can make a little TQ/HP with this inlet manifold, with a ported stock TB it would make an improvement over just the new inlet manifold and the new manifold would be slightly better than stock.Incremental gains,cost effective probably not but I am going to get one and port the TB too.
Peace.
Peace.
Cruiser
Joined: Aug 2012
Posts: 223
Likes: 44
From: Arkansas
Trending Topics
Road Captain
Joined: Sep 2012
Posts: 609
Likes: 159
From: Allover
Multi valve heads are generally for high revving engines and gain max efficiency at 6000 to 16000 rpm a la Superbike.
My info is that they could not achieve better results than the dual valve until they shut the valves real early.
The heads actually over breathe so porting and upsizing the inlet aperture without a displacement increase and expert
tuning, could be detrimental.Even the Stage 111 does not require manifold or injector upgrade.Just increased my fuel flow.
Better to go with a Stage or expert tuning kit.Sure you can find the real experts on this forum.
My info is that they could not achieve better results than the dual valve until they shut the valves real early.
The heads actually over breathe so porting and upsizing the inlet aperture without a displacement increase and expert
tuning, could be detrimental.Even the Stage 111 does not require manifold or injector upgrade.Just increased my fuel flow.
Better to go with a Stage or expert tuning kit.Sure you can find the real experts on this forum.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
6 Weirdest Harley-Davidsons Ever Sold to the Public
Verdad Gallardo
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
Thread
Thread Starter
Forum
Replies
Last Post
skinman13
Ignition/Tuner/ECM/Fuel Injection
8
Aug 11, 2021 05:50 PM