What was your gain from adding headers?
Thread Starter
Launching!
Joined: Feb 2002
Posts: 257
Likes: 0
From: TX & FL
What was your gain from adding headers? I'm looking for before and after #'s
I'm looking for #'s from people who added only headers, not headers, cam, full exhost and a whole other list of stuff at once.
If you had a cam before headers, then later added headers, what was your gain?
What was your gain from only headers?
-thanks
I'm looking for #'s from people who added only headers, not headers, cam, full exhost and a whole other list of stuff at once.
If you had a cam before headers, then later added headers, what was your gain?
What was your gain from only headers?
-thanks
Re: What was your gain from adding headers? Only headers, was about 2/10th in the qtr. This was after I already had true duals. Mines a 00 so you may see more gains. Some say the 98-00 share the same manifold, and others say only 98 & 99, so depends.
TECH Fanatic
Joined: Jun 2003
Posts: 1,070
Likes: 0
From: Further South than Hell
Re: What was your gain from adding headers? Tough to do that man. LT's I assume? Most poeple go with them and when u do that u have to change the Y-pipe. When y-pipe is changed they go with a cat back too (actually poeple change the cat back first). So ur gonna have a hard time guetting an answer to just a header change.
But with full exhaust mod u could be looking at up to 50+ Rwhp.
I went with shorties W/O cats+ O2 sims + 2.75 inch Y-pipe + Hooker 3 inch catback and got 27 RWHP. Did it for sniff reasons and clearance (Lowered +Body kit)
LT's are a better gain as mods increase, especially if u do cam and heads.
But with full exhaust mod u could be looking at up to 50+ Rwhp.
I went with shorties W/O cats+ O2 sims + 2.75 inch Y-pipe + Hooker 3 inch catback and got 27 RWHP. Did it for sniff reasons and clearance (Lowered +Body kit)
LT's are a better gain as mods increase, especially if u do cam and heads.
Thread Starter
Launching!
Joined: Feb 2002
Posts: 257
Likes: 0
From: TX & FL
Re: What was your gain from adding headers?
Tough to do that man. LT's I assume? Most poeple go with them and when u do that u have to change the Y-pipe. When y-pipe is changed they go with a cat back too (actually poeple change the cat back first). So ur gonna have a hard time guetting an answer to just a header change.
But with full exhaust mod u could be looking at up to 50+ Rwhp.
I went with shorties W/O cats+ O2 sims + 2.75 inch Y-pipe + Hooker 3 inch catback and got 27 RWHP. Did it for sniff reasons and clearance (Lowered +Body kit)
LT's are a better gain as mods increase, especially if u do cam and heads.
But with full exhaust mod u could be looking at up to 50+ Rwhp.
I went with shorties W/O cats+ O2 sims + 2.75 inch Y-pipe + Hooker 3 inch catback and got 27 RWHP. Did it for sniff reasons and clearance (Lowered +Body kit)
LT's are a better gain as mods increase, especially if u do cam and heads.
I'm not looking for nesasarly a stock car with only headers. All I'm looking for is headers added. Not headers and a whole list of other stuff.
Basicly what I'm going for here...I'm trying to figure what the FLP LT's, that FedEx should be bringing by any min. now, will do for my 01 LS6 with F1 cam...
with stock exhost manifolds I put 381 down (stock TB and stock tunning, but that dosn't matter right now), I'm wondering what kind of gains I could expect from the FLP's.
Trending Topics
TECH Fanatic
Joined: Jun 2003
Posts: 1,070
Likes: 0
From: Further South than Hell
Re: What was your gain from adding headers? Ok SS,. your headers are on the way anyway! So slap them on and Dyno your puppy you'll find out for yourself. Yours is a hybrid and no matter what anybody says the truth is in your #.
Since you have a baseline 381rwhp, i'm sure you can substract the difference.
Since you have a baseline 381rwhp, i'm sure you can substract the difference.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Launching!
Joined: Nov 2002
Posts: 209
Likes: 0
Re: What was your gain from adding headers? I was running 8.4x in the 1/8 mile with a tsp lid, hotcam, and loudmouth. I added pacesetter headers and y pipe and ran 8.05 @90.1 mph running through an open y. Sorry I dont have any 1/4 mile times yet.
Thread Starter
Launching!
Joined: Feb 2002
Posts: 257
Likes: 0
From: TX & FL
Re: What was your gain from adding headers?
Ok SS,. your headers are on the way anyway! So slap them on and Dyno your puppy you'll find out for yourself. Yours is a hybrid and no matter what anybody says the truth is in your #.
Since you have a baseline 381rwhp, i'm sure you can substract the difference.
Since you have a baseline 381rwhp, i'm sure you can substract the difference.
take a 
if you need to. 
TECH Fanatic
Joined: Jun 2003
Posts: 1,070
Likes: 0
From: Further South than Hell
Re: What was your gain from adding headers? Not upset 
once I got the picture of ur set up (didn't in ur initial post). I figured that my answer was the only one that would give u the true facts. Every other comment would be speculation. U got a 99 W/ 01 Zo6 and stock 99 manifolds. How many of us like that?
I thaought I was just making sense. I like your swap
OH and post ur # once you got that beast dynoed. I think you'll go 410/420 rwhp (Curious)
once I got the picture of ur set up (didn't in ur initial post). I figured that my answer was the only one that would give u the true facts. Every other comment would be speculation. U got a 99 W/ 01 Zo6 and stock 99 manifolds. How many of us like that?I thaought I was just making sense. I like your swap
OH and post ur # once you got that beast dynoed. I think you'll go 410/420 rwhp (Curious)
Re: What was your gain from adding headers? After LTs and Y-Pipe(no Cats) the car made
29 more HP @5600 rpm and 24 more Tq @4600 rpm.
Track # are inconclusive since I added 17's and
the weather was much worse than before, but it
shaved 2 tenths anyways, same trap. I blame the extra weight from the 17's for the trap?
29 more HP @5600 rpm and 24 more Tq @4600 rpm.
Track # are inconclusive since I added 17's and
the weather was much worse than before, but it
shaved 2 tenths anyways, same trap. I blame the extra weight from the 17's for the trap?
Re: What was your gain from adding headers? First mod I did on my 02 SS was SLP Longtube headers and Y-pipe (no cats). Pulled it in and dynoed 312.6 rwhp/332.1 rwtq. put it on the lift and installed the headers. dropped it and straight back on the dyno for 342.3 rwhp/357.0 rwtq. Not to bad. Oh yea I still have the stock cat back. I didn't really want to mess with it since I have the CME.
10 Second Club
Joined: Aug 2003
Posts: 190
Likes: 0
From: Mirabel, Québec, Canada
Re: What was your gain from adding headers?
But with full exhaust mod u could be looking at up to 50+ Rwhp.
My ls1 was full bolt on till last winter and no way I had gained more than 50rwhp over stock then...
Re: What was your gain from adding headers? A kid I know just got MAC headers, ORY pipe, and no cats...dumped through a cutout, he gained 4 mph in the 1/4 mile. He was trapping 106 (13.2), now its 110-111 (12.9 no traction). The 106 was run with stock exhaust, and a cutout.
TECH Fanatic
Joined: Jun 2003
Posts: 1,070
Likes: 0
From: Further South than Hell
Re: What was your gain from adding headers?
But with full exhaust mod u could be looking at up to 50+ Rwhp.
My ls1 was full bolt on till last winter and no way I had gained more than 50rwhp over stock then...
I maintain that he can very possibly gain 50 rwhp
