4 inch downpipe?

Perhaps i'm getting a little greedy here, but when ya spend 1300$ on a new turbo you want to pull the most out of it. so from what i've read the DP is the biggest improvement even if everything after it is stock, so i get to thinking has anyone done a 4" downpipe? would it be worth the extra effort?
i was thinking to get a 4" downpipe and then size it down to 3" at the cat.
Am I insane for thinking this?

Really no point in going to 4". There are single turbo 5.0's with 3" dp's making over 500hp. A 3" is more than enough with a good elbow off of the turbo.

-Scott Ressler

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S&R Racing
www.s-rracing.com

Am I insane for thinking this?

Why settle for 4"? Go for 5 or 6" Remember size does count!!! [Image: biggrin.gif]

yea but finding something to reduce 6" to 3" is kinda hard, not to mention fitting it in there and somehow mounting it to the T5 flange.
In that note, i was looking at getting Bob's elbow and downpipe. i notice most downpipes don't include the elbow/wastegate flange, i bet thats a lot of HP to be freed up right there.

Originally posted by Qwertys:

In that note, i was looking at getting Bob's elbow and downpipe. i notice most downpipes don't include the elbow/wastegate flange, i bet thats a lot of HP to be freed up right there.

It will give you a nice gain.

Originally posted by Pete D:
Why settle for 4"? Go for 5 or 6" Remember size does count!!! [Image: biggrin.gif]

You were using a magnifying glass when you were thinking about typing the reply right? [Image: eek.gif]



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Dan S
NATO Moderator
84 and 88 Turbo Coupes
It's no longer a hobby, now it's an obsession!

Brother-in-law just got a 40' motor coach with a 370HP Cummins engine. I told him that the turbo looks to be about the right size for the TC. I could use his IC, too.

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Terry: 88TC, 5spd, Gillis valve. NATO Member