IamRobbyah

I've found no deffinate write up.

Any help, and I'd be grateful. Thanks

xblazinlv

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

rynberg

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

IamRobbyah

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?

xblazinlv

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

overkill

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.

IamRobbyah

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

Thanks overkill

a3dcadman

iTrader: (1)

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

HardHitter

iTrader: (4)

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?

Monkman33

iTrader: (28)

Helps to keep it in check, yes.

IamRobbyah

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.

rynberg

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.

HardHitter

iTrader: (4)

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

IamRobbyah

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

afterburn27

iTrader: (5)

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.

IamRobbyah

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

EjCabrera

iTrader: (4)

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.

EjCabrera

iTrader: (4)

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.

dgeesaman

iTrader: (7)

Unbolt the halves of the turbo assembly.