Mazda Rotary Club

Cars by Model Type => 2nd generation RX-7's => Topic started by: dthebuk on April 27, 2010, 03:39:43 PM

Title: S5 waste gate porting
Post by: dthebuk on April 27, 2010, 03:39:43 PM
Just a few quick questions.

going to be running a 2.5 inch downpipe connected a free flowing 3 inch system and ive decided to port the waste gate.

anyhu, just wanted to know how big to go and what the stock size of the waste gate is. Also if the waste gate flap will need replacing for a bigger one.

by this time the car should be running a front mount too.
Oh, its a stock turbo


cheers
Title: S5 waste gate porting
Post by: TiddlesRX7 on April 27, 2010, 04:57:13 PM
I did mine recently. I just went easy with it as I didn\'t want to take too much out. I could have taken quite alot more out TBH.
Guide below
http://www.fc3spro.com/TECH/HOWTO/KWG/kwg.html
Title: S5 waste gate porting
Post by: dthebuk on April 27, 2010, 06:24:39 PM
thank you very much!!
you didnt measure your\'s before you put it back together did you?
Title: S5 waste gate porting
Post by: TiddlesRX7 on April 27, 2010, 06:39:50 PM
I can get the measurements of a stock one if you like. I have one in bits at work. But no, I didn\'t measure the one I ported. You kinda can see when you get into it how much you can open the holes out. Then its just a case of cutting the back of the hole out to suit. Just don\'t go too daft with it. Leave the holes a mm or 2 smaller then the wastegate flap.
Title: S5 waste gate porting
Post by: dthebuk on April 27, 2010, 09:07:45 PM
ah sweet, i was thinking something along those lines.

Cheers for the help. muchos apriciated
Title: S5 waste gate porting
Post by: TiddlesRX7 on April 28, 2010, 12:08:21 AM
No worries. If you FUBAR it give me a call I have 2 spare housings!