Rear mount exh 2.5 or 3
Rear mount exh 2.5 or 3 I did a search but got some conflicts. The smaller 2 1/2 spools faster, but will it restrict too much at high rpms? I am using a Garrett STS turbo on a mildly cammed LS1.
I wouldn't do 2.5", no matter how you look at it thats an awful small pipe to be feeding a T4 and to push all the gasses from a 5.7 through. I did 2 2.5" pipes into a single 3" on my rear mount and it spools like crazy and has great top end, the secret to keeping spool times low and building boost is retaining all the heat you can and double even triple header wrapping the pipes, and of course having no leaks. good luck
My last STS in my 98 was all 3" but I had already installed LT headers, I was not impressed with the spool time, but I liked the over all feel. I am putting this in a 93 Toyota pickup and I am still figuring out how to fit it all in. I ordered the CTS-V exh manifolds cause they look real tight, if they don't go I am going to get headers and make them fit and wrap them the best I can. Thanks....
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Well I am putting this setup in a 93 Toyota pickup so I won't be all out racing it too much, I think over 5500 RPMs will be hairy anyway...LOL. I will check search again for that thread, I remember seeing it, but could not find it. I have tried everything for manifolds including the CTS-V ones that fit tight. I ended up last night making a drives side header from cutting up old headers as nobody makes headers for this swap. Thank you for the replies......
