I've got what I think is an interesting project & I'm coming to the source for help. I've got a 13B-RE Cosmo motor with some FD Twins bolted on the side and the whole package slipped into my FC. Yes it fits, barely, even the downpipe fit! The Cosmo supposedly made good compression, I haven't checked it, I'm rebuilding it anyway to clean up the ports and port it. Big question is..... Which housings should I use? The Cosmo housings have a very restrictive exhaust port, I assume it was to help spool the turbos quicker & I'm pretty sure that sleeve isn't going to cut it after Bryan gets done with the Stage 3 Mod to those Twins, so which housing or sleeve should I use? I'm guessing the housing is going to be useable, I have a pair of S5 TII housings (one is junk to me) but both sleeves are in great shape. Should I swap the sleeves from the S5 or is there a big difference between... or any difference between the S5 and S6 sleeve? Thanks guys.. appreciate the help.

Oh..... I plan to portmatch everything on the intake side and clean everything up, probably a small to small/medium streetport - driveability is the KEY here, would it be beneficial to port the exhaust housings or are the twins the limiting factor?

Thanks again

-B

 

use 13b-rew housings or the sleeves , you should be ok

 

Is there a difference between S6 sleeves (I don't have) & S5 TII sleeves? (I have)

I'm assuming that I should use some type of sleeve to keep the velocity up, correct?

^ & thanks

-B

 

i am no expert in TII but i think they are the same

 

Have any junk FD housings or sleeves?