Hey guys, contemplating what kind of exhaust port to get. My province has no emissions testing so I don't really have any care for that sort of stuff, no noise laws or anything like that. The car will be used on the street and am aiming for a quick spooling setup with ~350 rwhp at ~15 psi and 400 19+psi. Not really sure if any of those numbers will be exact, just guestimating with the information I've gathered from people with similar builds.

I'll be using 9.7:1 rotors now and more than likely a GT35R (or some variant) or a TO4E/TO4S some time in the FAIRLY near future. RB Rev T2 full exhaust.
So basically I'm wondering, what exhaust port should I go with? What will give me best spool or is there minimal difference at all between the ports? How about a race port, any difference there?

 

being from saskatchewan canada im in the same boat. i have had buddys to half bridge ports full bridge ports.....i personally wouldnt go bigger then an aggresive street port.

 

wow, my aunt lives in regina

 

WOAH, i live in regina... and i have an FC... DODO logic anyone?

 

and when you talk about ports, its intake ports, not exhaust. I have heard that making a larger exhaust port doesn't do anything exactly (someone can correct me if im wrong on that, again not 100%). If you plan on getting larger ports, i would get a small or medium street port, nothing to extravagant and then that GT35R. Very nice spool time. If you get to big of ports and try and push to much psi, I have heard of some pretty big problems. Also, there's a reason turbod cars have lower compression than N/A. Do a little bit of research.

 

for 350hp@15psi, and 400@19psi you could do that on stock ports, if you pick the right turbo and exhaust....

also 9.7 rotors probably will hurt you unless you run it on race gas or something. it seems on normal pump, the 9.7 rotors need such a conservative tune that 9.0 on a normal tune makes more hp

i saw a dyno chart, back to back between 9.0 and 9.7's on a turbo engine and it was something like a 50hp difference, in favor of the 9.0's.

 

You could do the stock exhaust ports, but I would go wider and down a little bit. Don't touch the top. Seems to work very well compared to everything else we've done, and that has been everything short of big square ports..

 

Trust me, I've done my research. I'm making my setup aiming for full boost (~15 psi) at ~3000 rpms. I know the "level" of porting refers to intake and that there's not much you can do with the exhaust, but I'm trying to milk EVERY bit of spool out of this. Divided short runner manifold, not decided on intercooler yet (air to water, larger top mount and small core FMIC are what I'm trying to decide between).

This car is gonna be my daily, and I don't need excessive power (I think whatever 15psi gets me will be more than plenty and a high boost setting of ~20psi for fun/drag/drifting).

I'm going to be running Pre-turbo WI to compensate for the 9.7 rotors, and if needed I'll do meth instead and deal with tuning it.