y pipe size and header type power comparision needed
Thread Starter
Joined: Jul 2005
Posts: 638
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From: Toronto,Ontario
Car: 1989 IROC-Z
Engine: 346 LS6
Transmission: T56
Axle/Gears: Hybrid 8.8 3.73
y pipe size and header type power comparision needed
hello
I am currently planning to use longtube hedman hedders [ 3 inch collector] and make a 2 1/4 inch y pipe that goes around the tranny into a 3" back. Would this be better or worse than midlength hedders with a 2 1/2 inch y pipe in the stock routing location?
Someone please shed some light
Lee
I am currently planning to use longtube hedman hedders [ 3 inch collector] and make a 2 1/4 inch y pipe that goes around the tranny into a 3" back. Would this be better or worse than midlength hedders with a 2 1/2 inch y pipe in the stock routing location?
Someone please shed some light
Lee
Thread Starter
Joined: Jul 2005
Posts: 638
Likes: 0
From: Toronto,Ontario
Car: 1989 IROC-Z
Engine: 346 LS6
Transmission: T56
Axle/Gears: Hybrid 8.8 3.73
Re: y pipe size and header type power comparision needed
i would love to but ground clearance would be a major problem considering that the y ypipe would have to go over the automatic tranny crossmember to use my longtubes.
So for now i just need suggestion on whitch of the two i posted are better.
Thanks
Speed
So for now i just need suggestion on whitch of the two i posted are better.
Thanks
Speed
Thread Starter
Joined: Jul 2005
Posts: 638
Likes: 0
From: Toronto,Ontario
Car: 1989 IROC-Z
Engine: 346 LS6
Transmission: T56
Axle/Gears: Hybrid 8.8 3.73
Re: y pipe size and header type power comparision needed
thats a good idea i haddnt thought of that, is there somewhere i can but it, or do i put normal pipe the the vice?
thanks
speed
thanks
speed
Senior Member

Joined: Jul 1999
Posts: 900
Likes: 1
From: Haslett, MI
Car: 1984 Trans Am WS6
Engine: Minirammed 385, 396 RWHP
Transmission: T56
Axle/Gears: 3.73 Moser 12-bolt
Re: y pipe size and header type power comparision needed
CHeck the thread on "BOOM TUBES" I believe there are several links in that thread that reference where to buy oval tubing. No, you cannot squish it in a vise to make oval tubing. As you squish, the cross-sectional area gets reduced. Oval tubing has a larger circumference to ensure that the cross-sectional area remains constant through the whole length.
Senior Member
Joined: Nov 2006
Posts: 455
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Car: 1984 Trans Am
Engine: Built chevy 350
Transmission: TCI Built 700r4
Axle/Gears: 3.73 posi 10 bolt
Re: y pipe size and header type power comparision needed
Another option is to run hooker 2055hkr...they come with a 3" Y-pipe then run a 3" all the way back into a 3" inlet muffler with dual 2 1/2 outs.
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