IC pipe size 2.5" or 3"

[frontierguy25]

Hey guys, I've searched and I can't find the thread where you guys were talking about numbers with a SP61 turbo or boss turbo.

I'm doing 2.5" lowers, from the turbo to the IC and was thinking about doing the uppers in 3", however it is a pain in the ass trying to route that stuff. I think that I could make it work, just harder to do so. The 2.5" will have no problem.

On 17lbs I'm making 407 rwhp and 408rwtq with a 60-1 boss. The most I want to boost is 25 psi with race gas which will put me in the upper 400's maybe low 500's. I'm doing this today. So Please help a supra guy out.

Thanks

Oh yeah, I don't have a FFIM yet so it is going the stock route, unless 3" then will have to go through the intake port

 

[Slow66]

I'd stick to 2.5"...

 

[frontierguy25]

Thanks Bryan, I'm going to stick with those because routing that 3" pipe is just going to plain suck! Now once I have a FFIM I'll go bigger.

 

[jdub]

i'd stick to 2.5"...

x2

 

[adampecush]

somebody made a post with IC piping size calculations...hopefully somebody has it bookmarked and can post it here.

From your setup, it sounds like 2.5 would be about right. On a similar setup, I'm going with 2.75"

 

[jdub]

The IC needs to have the same size inlet/outlet as the piping or it will not make a lot of difference in flow.