Wastegate Porting
01-14-07, 11:56 AM
#1
Wastegate Porting
Well, with the engine out, i got the chance to do a bunch of smaller projects i've been meaning to do, such as cleaning, wiring & grounding, and wastegate porting. This was all done with a dremel, using the orange grinding wheels. I still need to weld a larger washer to the actuator arm, thats gonna happen when im back at school with access to a welder.
Once its back together, I'll post up about the (hopefully) lack of boost creep.
Once its back together, I'll post up about the (hopefully) lack of boost creep.
01-14-07, 03:05 PM
#2
Engine, Not Motor
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Seems kind of small to me. 
It looks like it's only slightly bigger then the stock flapper valve. You can go much larger.
http://www.aaroncake.net/rx-7/s4wastegate.htm
It looks like it's only slightly bigger then the stock flapper valve. You can go much larger.http://www.aaroncake.net/rx-7/s4wastegate.htm
01-15-07, 04:36 AM
#3
I'm a boost creep...
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Yep, too small... 
Plus it needs a lot more back-cutting.
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/serious-s4-wastegate-porting%85-343788/ (scroll down to post #15 for reposted pics)
Plus it needs a lot more back-cutting.https://www.rx7club.com/2nd-generation-specific-1986-1992-17/serious-s4-wastegate-porting%85-343788/ (scroll down to post #15 for reposted pics)
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