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2.5" is a bit big for your combo and 3" is a bit small. Work looks good though. 2.5" will easily handle 2000-2400hp, while 3" will support 400-450hp. I would have gone smaller on the crossover and bigger on the downpipe. I would have liked to see 2" on the crossover and 3.5" on the downpipe for your setup.
Last edited by Phil99vette; Feb 14, 2011 at 07:54 AM.
2.5" is a bit big for your combo and 3" is a bit small. Work looks good though. 2.5" will easily handle 2000-2400hp, while 3" will support 400-450hp. I would have gone smaller on the crossover and bigger on the downpipe. I would have liked to see 2" on the crossover and 3.5" on the downpipe for your setup.
Working and Working efficiently are 2 different things. We run 2.5" crossover on setups that make 4x that horsepower. The pre-turbo tubing should be sized for velocity and the post turbo should be sized for flow. Will it work, yes.... Can you make small changes and make boost faster, absolutely.
Read this if you got a chance.
https://ls1tech.com/forums/forced-in...es-help-6.html
https://ls1tech.com/forums/forced-in...es-help-6.html
Man I spent alot of time making the hot side. Everyone I talked to said to use 2.5 for the crossover. I dont really have the time or money to remake it and now I'm worried I won't see boost soon enough as it is a street vehicle. If I can should I remake it? Or let it be and see how it works.
you're not building a race car with a giant turbo, i think the crossover is fine. i cant find any of the info on your build (i did now, but i had to dig... YOU STILL DONT HAVE A BUILD THREAD!)
so a t70/ls1 - it'll spool FINE. its not like you're running a 98mm thumper or something. i'd personally go with at least a 3.5 inch DP though. the downpipe should be (appx, from what i've read) 1.25x larger than the outlet of the turbo.
so a t70/ls1 - it'll spool FINE. its not like you're running a 98mm thumper or something. i'd personally go with at least a 3.5 inch DP though. the downpipe should be (appx, from what i've read) 1.25x larger than the outlet of the turbo.
you're not building a race car with a giant turbo, i think the crossover is fine. i cant find any of the info on your build (i did now, but i had to dig... YOU STILL DONT HAVE A BUILD THREAD!)
so a t70/ls1 - it'll spool FINE. its not like you're running a 98mm thumper or something. i'd personally go with at least a 3.5 inch DP though. the downpipe should be (appx, from what i've read) 1.25x larger than the outlet of the turbo.
so a t70/ls1 - it'll spool FINE. its not like you're running a 98mm thumper or something. i'd personally go with at least a 3.5 inch DP though. the downpipe should be (appx, from what i've read) 1.25x larger than the outlet of the turbo.