GReddy Turbo Kit Downpipe Problem

[Reaper]

Fullblown made 600whp on a stock overpipe. Why does everyone freak out about overpipe size? I made 393wtq with a perrin 2.5. If your downpipe bolts up to a stock overpipe then that means it has a 2.5 flange on it anyway so going bigger than that won't do anything that close to the turbo.

[fika84]

Originally Posted by ofuts

Thank you for response.
It seems Ultimate racing and MAperformance only have catless, i need cat, and resonator.
I will need to talk with my shop about AVO and FBM.
Any suggestions how to link up with Greddy test pipe? i guess it is 50 or 60mm.

JDL makes a 3" catted front pipe & over pipe. I also wanted the Perrin 3" since I too have the Perrin 3" cb, but I will be going with JDL when the time comes.

http://jdlautodesign.net/shop/ft86-o...nt-pipe-combo/

[King Tut]

Originally Posted by Reaper

Fullblown made 600whp on a stock overpipe. Why does everyone freak out about overpipe size? I made 393wtq with a perrin 2.5. If your downpipe bolts up to a stock overpipe then that means it has a 2.5 flange on it anyway so going bigger than that won't do anything that close to the turbo.

Because they like making life difficult. I don't have the heart to tell him that his turbo setup will probably destroy any high flow cat he puts in anyways.

[FullTuneZN6]

Originally Posted by King Tut

If your downpipe is only 2.5", then I would go with a 2.5" over pipe and then transition to 3" at the front pipe. Even getting a 2.5" over pipe to fit can be difficult.

I agree that 2.5 OP makes the most sense(fitment and clearance), with 3" transition from front pipe back...I like both perrin and nameless mostly for the mellow sound from what I've researched, but it seems that in order to accomplish this setup it will have to be a mix of perrin and nameless bc perrin no longer makes the 3" front pipe.


Option 1) Perrin 2.5 OP, Nameless 3" catted/resonated FP/ Perrin 3" CBE


Option 2) Perrin 2.5 OP, Nameless 3" catted/reson. FP/ Nameless axleback


Option 3) Full Nameless 3" exhaust (their kit has (4) pieces) OP/DP combo, midpipe, S-pipe, axleback.


The concern with mixing aftermarket parts of course is getting everything to marry up nicely.


Option 4) Sorry, Nameless has 2.5 OP/DP combo and then marry that to Perrin 3" CBE? thoughts on transitioning to 3" this late in the exhaust? Will it be a significant enough impact on this turbo setup to justify price OR at this point just go FULL 2.5? Thanks

[myioz86]

well i am in the proses of making my own 3" mid pipe for the 86 front flang is 2.75 rear flang is 3" with 3" high flow cat no resonator . invidia n1 cat back . invidia 2.5" over pipe.off spd turbo with 2.5" down pipe 10PSI . with this new mid pipe i am hoping to push 12psi. KING TUT you said that high flow cat could get destrowed with turbo , could you tell me why that would happen. sorry for the noob question.

thanks john