Flowmaster Question
Thread Starter
Safety Car
Joined: Feb 2003
Posts: 4,575
Likes: 369
From: Ozark, MO
C5 of the Month 6/13
Flowmaster Question
I'm thinking about buying a set of 40 series flowmaster mufflers for the vette, but i'm not sure if i should get the 2 1/2 offset inlet/center out or the 3 offset inlet/center out. My current exhaust set up is stock, 2 3/4 pipe. Also, should i expect any horsepower gains by installing these mufflers.
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
Re: Flowmaster Question (Johnson 92)
That's a good question. My stock 92 exhaust is 3" in some places and necks down to what looks like 2 1/2" at the muffler inlet. My guess would be to measure the pipe before it necks down and try that. I really think an e-mail to Flowmaster would settle this question. Let us know how it works out.
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Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Flowmaster Question (Johnson 92)
This is why a good cat-back system works best; the stock system has necked or waffle bends which restrict gas flow. Remember flow is restricted more by pipe diameter (actually cross-section area, so square of diameter) than by length.
A mandrel-bent pipe system with hi-flow mufflers is best.
A mandrel-bent pipe system with hi-flow mufflers is best.
Drifting
Joined: May 2002
Posts: 1,432
Likes: 0
From: Southeastern Louisiana
St. Jude Donor '05
Re: Flowmaster Question (Johnson 92)
I believe that it is the 2.5". Flowmaster claims up to 30 horses with their exhaust. I've had mine for about 2 weeks and think that I have some SOTP improvements, but it could also just be me gunning it more to hear the exhaust!
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 32
From: The Top of Utah
Re: Flowmaster Question (Blueyednd)
Congratulations on a REALISTIC results report.
True increases show up on a time slip. In any case, you seem to be enjoying your "improvement". And that's why you did it, isn't it? Thanks, for no "pie in the sky" claims.
RACE ON!!!
(I) think that I have some SOTP improvements, but it could also just be me gunning it more to hear the exhaust!
RACE ON!!!
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Race Director
Joined: Mar 2001
Posts: 11,405
Likes: 26
From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
Re: Flowmaster Question (65Z01)
This is why a good cat-back system works best; the stock system has necked or waffle bends which restrict gas flow. Remember flow is restricted more by pipe diameter (actually cross-section area, so square of diameter) than by length.
A mandrel-bent pipe system with hi-flow mufflers is best.
A mandrel-bent pipe system with hi-flow mufflers is best.