wastegate porting
09-09-2002, 03:00 PM
#3
Super Moderator
Join Date: Apr 2002
Location: VA
Posts: 2,532
Originally Posted by Geoffman72' date='Sep 9 2002, 07:22 PM
I did it on my old stock 87 turbo. Were you looking for a walkthrough or...?
:P
09-09-2002, 03:34 PM
#5
Senior Member
Join Date: Nov 2001
Location: Rochester, NY
Posts: 1,234
To answer all your questions,
http://fc3s-pro.com/TECH/HOWTO/howto.html
Then go to turbo turbine housing porting
The benefit of the wastegate porting would be less chance of boost creep. After doing this to mine I didnt get boost creep at ALL, but I also ported mine so large I suspect a little boost was leaking at all times.
The turbine exhaust inlet porting, in conjunction with removing the twin scroll, got me the 1psi back that I lost in the wastegate porting.
So whereas before, it would be at 5 in gears 1 and 2, then spike to 7 or almost 8 in 3-5, after the work was done it would be above 6 in gears 1-2 and close to 7 through the rest.
If I feel like it I might make my own write up on all the steps, tools needed and what not to do this
http://fc3s-pro.com/TECH/HOWTO/howto.html
Then go to turbo turbine housing porting
The benefit of the wastegate porting would be less chance of boost creep. After doing this to mine I didnt get boost creep at ALL, but I also ported mine so large I suspect a little boost was leaking at all times.
The turbine exhaust inlet porting, in conjunction with removing the twin scroll, got me the 1psi back that I lost in the wastegate porting.
So whereas before, it would be at 5 in gears 1 and 2, then spike to 7 or almost 8 in 3-5, after the work was done it would be above 6 in gears 1-2 and close to 7 through the rest.
If I feel like it I might make my own write up on all the steps, tools needed and what not to do this
