the pope

it was sugested to me to port my waste gate. is this a good idea? what would you port it out to? this is my first turbo so any intel would be useful.
thanks
ben

mar3

iTrader: (8)

If I'm not mistaken, porting a wastegate makes it more responsive and less of a "light switch-on/light switch-off" affair...but I'm not a turbo guru by any means. Let's see what the 2ndgen guru's have got to say.

Mario III

JDMFC3S TII

People port there wastegate (typically on s4 turbos) to eliminate boost creep. Boost creep is when you keep building boost in wide open throttle because of the wastegate being too small and allowing too much exhaust gases to run through the turbine and not enough out the wastegate. I would recommend it to keep you from over boosting and leaning out.

the pope

thanks J
i have an s4 engine and an s5 turbo. would this make a differance or should i port to be on the safe side? would a turbo timer be a good investment?

JDMFC3S TII

Do you have any boost creep issues right now? A turbo timer is really not necessary because rx7 turbos are water cooled. So they really don't get as hot as other turbos.

the pope

i am unsure of any boost creep issues. i do not have it put together just yet.

JDMFC3S TII

Let us know when you put it back together. Good luck!

Aaron Cake

iTrader: (1)

http://www.aaroncake.net/rx-7/s4wastegate.htm

the pope

thanks arron. that was a great walkthrough and a tremendous help