? about porting the 2g ex.manifold

[dsmsucks]

Hi I was going to port my exhaust manifold(Just the outlet part). I was wondering do I port the outlet to match a 7cm gasket or do I just port it to get rid of the step?
I went to vfaq.com but It looked like they only ported the step
Thanks

 

[VBGSX]

Most port the step and maybe just a little beyond.
I would say it depends on several things.
1. how large that gasket actually is
2. How large is the opening of the turbo.

Reading the vfaq:
http://www.vfaq.com/mods/porting-turbo.html
and
http://www.vfaq.com/mods/porting-exhman.html
both just ported the step.

If you bought a ported turbo, port match everything to that size. You want everything flowing smoothly, not running into steps, etc.

Good luck

 

[oldman]

The rule is small to big, never big to small. It would be a great thing if you're willing to port match it to a 7cm gasket, the trick is you must port the turbine housing to match. Check out this thread so you'll have a better idea of what a complete/real port job looks like.