Y-pipe size
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Junior Member
Joined: Sep 2002
Posts: 93
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Car: 91 Camaro
Engine: 383
Transmission: 700r4
Y-pipe size
I have approx 450hp and I was wondering how bad the 2 1/4 y pipe on the slp headers is hurting me? Do you think it would be worth building a new 2 1/2 y pipe for them
Supreme Member
iTrader: (6)
Joined: Aug 2009
Posts: 3,670
Likes: 3
From: Elwood, IN
Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: Y-pipe size
what determains the y pipe size? i got a y pipe off an 89 iroc with a 350, auto and rear disk and i cant for the life of me tell that size it is, hoping it will bolt into my intermidiate pipe.
Joined: Jun 2002
Posts: 13,576
Likes: 30
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
Re: Y-pipe size
yes, it's hurting you. i put a 2.5" y-pipe to 3" single on a set of 2460's on a 260hp 350 crate and it was a HUGE improvement.
there are some calculations on pipe size somewhere. PipeMax is a program you can buy to tell you. you need a certain area per x amount of HP. figure out how much HP you have, then finding the area isn't hard. to find diameter it's just 2(sqrt(area/Pi)). i don't know how to tell you to find the area needed though.
there are some calculations on pipe size somewhere. PipeMax is a program you can buy to tell you. you need a certain area per x amount of HP. figure out how much HP you have, then finding the area isn't hard. to find diameter it's just 2(sqrt(area/Pi)). i don't know how to tell you to find the area needed though.
Thread Starter
Junior Member
Joined: Sep 2002
Posts: 93
Likes: 0
Car: 91 Camaro
Engine: 383
Transmission: 700r4
Re: Y-pipe size
[QUOTE=mw66nova;5383009]yes, it's hurting you. i put a 2.5" y-pipe to 3" single on a set of 2460's on a 260hp 350 crate and it was a HUGE improvement.
what size was the original on the 2460's mine is 2 1/4 into 3" largest I can go with slps is 2 1/2.
what size was the original on the 2460's mine is 2 1/4 into 3" largest I can go with slps is 2 1/2.
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