[Z06] LT Headers- Reasonable HP Expectations?
Thread Starter
Burning Brakes
Joined: Aug 2007
Posts: 831
Likes: 2
From: Houston Texas
LT Headers- Reasonable HP Expectations?
I have a 2002 Z06 which EnglandGreen recently dyno tuned at 374RWHP. The only mods were as follows: CAI Intake (homemade with KN Filter); Magnaflow X-Pipe; and Corsa Extreme Cat Back System.
Stephen and Jason both indicated that I had a fairly healthy basically stock Z06 to yield the 374 RWHP.
I am contemplating having LT Header (with Cats) installed by EnglandGreen and having them re-run the dyno tune.
With 374RWHP already - What can I realistically expect ( no BS) to gain in RWHP with the addition of a LT Header system?
I am guessing 385 RWHP - Obviously for the dollars being spent I would prefer to see 390RWHP plus.
Anyone ?
Stephen and Jason both indicated that I had a fairly healthy basically stock Z06 to yield the 374 RWHP.
I am contemplating having LT Header (with Cats) installed by EnglandGreen and having them re-run the dyno tune.
With 374RWHP already - What can I realistically expect ( no BS) to gain in RWHP with the addition of a LT Header system?
I am guessing 385 RWHP - Obviously for the dollars being spent I would prefer to see 390RWHP plus.
Anyone ?
Last edited by NatB; Oct 30, 2009 at 12:11 PM.
Supporting Tuner
Joined: Sep 2004
Posts: 51,896
Likes: 39
From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
My guess is around 385rwhp, possibly even 390rwhp. The highest we have seen on a bone stock Z06 with CAI & full exhaust through the Ti catback is 395rwhp on a Dynojet 248x.
Stephen
Stephen
Last edited by EG@EnglandGreen; Oct 30, 2009 at 01:46 PM.
Melting Slicks
Joined: Dec 2006
Posts: 2,186
Likes: 2
From: Woodinville WA
Long tubes in themselves only contribute around 15hp to these cars on a stock engined bolt-on car. If you are doing the install and tune yourself it might be worth the cost IMO. But if you are farming it out you must ask yourself is $1,200-$1,500 for the headers + install and re-tune.
Depending on where you are doing it you could be well over $2K for 15hp. Might be good for a tenth or two in the 1/4 mile. If it seems worth it to you that's your call.
Depending on where you are doing it you could be well over $2K for 15hp. Might be good for a tenth or two in the 1/4 mile. If it seems worth it to you that's your call.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Burning Brakes
Joined: Sep 2000
Posts: 1,166
Likes: 0
From: Scottsdale AZ
I made 393 with LG Pro's /w cats & Blackwing through the Ti's. I would think 15-20hp is reasonable with the addition of long tubes and new tune.
Last edited by Rob 2K1; Oct 31, 2009 at 08:50 AM.
Burning Brakes
Joined: Aug 2007
Posts: 880
Likes: 0
From: Bath PA
My 2001 Z baseline dyno run with stock everything except K&N filter in the stock box was 331rwhp. With Blackwing, CF bridge, LG Pro LTs & tune she bumped to 380rwhp. Everything else still stock including Ti exhaust.
Instructor
Joined: Feb 2007
Posts: 240
Likes: 0
From: Lewistown MT
An 01 will respond a bit better to bolt-ons than an 02+ b/c the factory airbox and pup cats were restrictions that were changed for 02 to help increase the output.
Thread Starter
Burning Brakes
Joined: Aug 2007
Posts: 831
Likes: 2
From: Houston Texas
Thanks everyone for responding to my post !
I am figuring LT Headers with cats ( either LG Pros or American Racing) will bump my present 374 RWHP to the range of 380 to 390 RWHP - likely around 385 RWHP.
On the high end- it sounds like 390 to 394 RWHP is possible while maintaining a safe tune.
I am figuring LT Headers with cats ( either LG Pros or American Racing) will bump my present 374 RWHP to the range of 380 to 390 RWHP - likely around 385 RWHP.
On the high end- it sounds like 390 to 394 RWHP is possible while maintaining a safe tune.
Drifting
Joined: Oct 2009
Posts: 1,438
Likes: 4
From: Always in my lane.
Sounds pretty healthy but I would discount the cat-back exhaust because the gains there are pretty minimal. Long tubes would probably bump it up about 10-15hp. The stock TI is less restrictive than people think. My 01Z has Blackwing, modified radiator shroud, Vram power duct,Stainless works headers, high flow cats , X-pipe and tune for 392hp-387lbsft. Im all good!!
Last edited by DARRYLZO6; Oct 31, 2009 at 06:27 PM.
Melting Slicks
Joined: Dec 2006
Posts: 2,186
Likes: 2
From: Woodinville WA
Thanks everyone for responding to my post !
I am figuring LT Headers with cats ( either LG Pros or American Racing) will bump my present 374 RWHP to the range of 380 to 390 RWHP - likely around 385 RWHP.
On the high end- it sounds like 390 to 394 RWHP is possible while maintaining a safe tune.
I am figuring LT Headers with cats ( either LG Pros or American Racing) will bump my present 374 RWHP to the range of 380 to 390 RWHP - likely around 385 RWHP.
On the high end- it sounds like 390 to 394 RWHP is possible while maintaining a safe tune.
Thread Starter
Burning Brakes
Joined: Aug 2007
Posts: 831
Likes: 2
From: Houston Texas
In Houston you get a fine for not running cats- I know people who've been pulled over and the LEO checked underneath for cats. Serious fine I think.
Regardless- the cats are there to reduce the pollution my kids are going to have to deal for years to come. I'm sticking with them
Regardless- the cats are there to reduce the pollution my kids are going to have to deal for years to come. I'm sticking with them
Le Mans Master
Joined: Jun 2001
Posts: 7,331
Likes: 518
From: Admit Nothing, Deny Everything, Make Counter Accusations.
Burning Brakes
Joined: Aug 2007
Posts: 880
Likes: 0
From: Bath PA
There was an article comparing LG Pro-series with and without hi-flo cats. No reason not to have them unless it's a track only car.
Corvette Fever or one of those.