Ryu

tell me what you think. to small or should be fine?

gsracer

Looks good.

Ryu

thanks, i can't believe over 60 people have looked and only one person has commented.

zeromage428

well, i dont know alot about porting, but i have seen some porting jobs done n this one looks good : )

Ryu

thanks, i appreciate it.

SureShot

You can also get more flow by back cutting the door so it can open wider before hitting the back plate.


Here is an example:


Also there is a funnel point that can be relived:

Ryu

awesome, thanks for that info. thats exactly the kind of feedback i was looking for.

looks like i'll go back a touch up those spots that you mentioned.

Travelintrevor

`post some results when you get her back on..how much boost you are making...any improvement in boost creep department..etc..

BLUE TII

iTrader: (9)

Also, you could port the front of the wastegate holes where they meet the exhaust runner lower and rounded while leaving the rear of the WH holes vertical of even porting in a little "bowl" to trap flow.

Basically, try to get the exhaust in the turbo housing to favor WG flow as much as possible. I even cut NACA ducts leading up to WH holes, but I am a freak.

SureShot

Here are my numbers:

Completely stock: 5-6-7-7-7
Gutted cats: 6-9-11-11-11 (big boost creep)

Ported waste gate & flapper clearanced: 5-6-6-6-6 (no boost creep)
Stock boost control removed, MBC in line: 9-10-11-11-11 (fully adjustable)

Aaron Cake

iTrader: (1)

Here are examples of my ported S4 wastegate. I would not recommend going this extreme unless you are running high compression, non-stock ports, or both. But I don't know the meaning of the word "boost creep"...

Ryu

very nice Aaron. i've back cut the wastegate a bunch as well, you just can't see it in the pics to well. the larger hole farthest from the turbine can't be ported much due to it running under the other port. if its ported to much then you'll get cracking as you all know.

once i get the car running again i'll post my results but the car won't be back for a while. i just ordered a motor for the car today so when it comes in i'll get to progress further.