I've found no deffinate write up.

Any help, and I'd be grateful. Thanks

 

http://fd3s.net/turbos.html#WAS

 

From the FAQ thread: https://www.rx7club.com/3rd-generation-specific-1993-2002-16/how-port-wastegate-426526/

 

Thanks guys. I have seen both of those, but I thought there may have been more info involved.

Ima jump on this tomorrow =)

The reason I ask, my Hi-flo cat is chunking, so I figured I'd hollow it out. I have an M2 reflash (PFC on the way!!) and a manual boost control (PF stock mount int., freshly cleaned injectors, dp, 3" cb, an a couple other minor things). Should i be safe for the time bein, or should I leave the stock cat on for now and wait for the pfc + tune?

 

Just get a good bit and go around the hole until the wastegate just barely has enough left to seal off the hole. Don't overport

 

I made a short one a few years back, ill try and find it.. BRB!

Here it is, Ill include a picture as well.
https://www.rx7club.com/forum/showthread.php?t=341412

The first picture is the normal port size, the second shows the difference before and after. Hope this helps.

 

very cool!!!! i vote this to go into the faq thread! -- seeing that it needs to be updated.

Thanks overkill

 

I did mine recently. I locked my manifold piece in a vice on the drill press platform. I removed the flapper and welded on a larger diameter piece when I completed my port and polish job. Works great and took care of boost spikes and gave me a little more piece of mind.

I believe the final diameter for the hole was ~1.35". I found a hemispherical grinding stone mounted on a shaft in my junk drawer which was the exact diameter I was making the port. The hole was chamfered and the flapper also was beveled around the mating edge.

chuck

 

Hey man, you're in the Bay Area? Would you want to do this together? I'm probably going to want to port my wastegate for whenever I get a midpipe/high flow cat. Porting the wastegate helps eliminate boost creep correct?

 

Helps to keep it in check, yes.

 

HardHitter: ^^ what Monk said. I'm in the north bay -- Vallejo. I'm going to port mine tomorrow. I'll let you know how it goes. If I feel confident enough, and you need help, by all means, I'd be happy to help you out.

Bump to my question on post #4, regarding my Hi-Flo cat.

 

Of course the stock cat would be safer. You should be fine with the midpipe and M2 ecu if you can keep boost at 10 psi. I would not run more than 10 psi with the M2 ecu with a midpipe.

 

Good luck with the porting Robb, lemme know how it goes!

 

I have no plans to go more than 10 lbs. Will doing this prove to be benificial though? ie: better turbo response?

 

No, if you overport the wastegate you will actually have slower spool up.

The only reason the port the wastegate (as far as I know) is to prevent boost creep.

 

I'm actually referring to hollowing out my now, rotted out, Hi-Flo cat.

 

this may seem like a noob question but how do i actually get to the waste gate. my turbo's are already out and converted to nonseq. i just need to port it now. can someone take pictures of what bolts i have to remove in order to see the waste gate thanks.

 

common guys you were just talking about how to port. i just want to know how to take the front turbo off so i can get to the porting.

 

Unbolt the halves of the turbo assembly.