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07-28-2006, 06:14 PM #1
long tubes fail performance expectations
I just finished installing dynatech's longtube header system on my 99 formula, and i am somewhat dissapointed w/ the performance results. However, i still have a stock catback exhaust system, and i think that is probably severely hindering the long tubes performance potential. Is this true? I plan to get a cutout soon, so that should let me know for sure. And also, the lowest point of my y-pipe is only 3 inches off the ground on a stock height F-body. is that right? Everything else seems to be running fine though, no check engine lights or anything like that. Any help would be great. thanks.
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07-28-2006, 06:36 PM #2
- Join Date
- Jul 2005
- Location
- Earth
- Age
- 47
- Posts
- 3,365
414 RWHP 395 RWTQ- 00 Black Ram Air Trans Am
Yes and yes and yes...how many q's were there again??? 3 inches is normal on height......stock catback and headers??? Why??? Yes cutout will help you greatly, dyno with it open and closed and post up some results, I'm betting you gain 15-20 over stock CB
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07-28-2006, 06:54 PM #3
- Join Date
- Dec 2002
- Location
- n/w chicago
- Age
- 54
- Posts
- 6,932
black- 2000 nhra edition formula
with long tubes and a tune, i gained 30 rwhp.
get rid of the stock exhaust2000 nhra edition formula
a few bolt ons, 379 rwhp
11.96 @113.25
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07-28-2006, 06:55 PM #4
- Join Date
- Aug 1999
- Location
- Arizona
- Posts
- 51,364
Black- 383 Procharged & N20 Vert
Yes get rid of the stock exhaust and get it tuned.
Black 1999 Blown Convertible A4
Forged 383 | ATI D-1SC
NX MAF Kit | 222/226 .585 115
AS Stage II 6.0L FI Heads
Moser 9" | 3.70 | Wavetrac | 35 Spline | Vigilante 3600
548.0 RWHP - 563.8 RWTQ - 10# - D1
666.0 RWHP - 734.2 RWTQ - 125 Shot - P1
Black 2009 Escalade Hybrid 4WD
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07-29-2006, 02:14 PM #5
Keep the stock catback and get a cutout. Ohh, and, get it tuned.
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07-29-2006, 07:37 PM #6
Hah, Its been 4 years since my full exhaust install (Hooker Super comps, coated) and ive never had a tune. I want one, but I dont understand why tunes cost so much $$.
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