ok here is the story. most of you seen my full race 30r results thread. you know since then i pulled the 30r off the car and put the 35r on the car. here is a long story short.

on the 30r
on the 30r setup everything worked fine. i had no boost problems. boost held well. everything was fine.

then i pulled the 30r off the car and put the 35r on the car. NO OTHER MODS WHERE CHANGED

on the 35r
on the 35r at 1st i had no boosting issues. but i had compressor surging. so we went on with trying to fix this. one thing we looked into waste waste gate spring pressure. so we pulled the mbc off the car and ran waste gate psi. 14psi is what it was. then i was told to try and match the waste gate psi to the boost level i wanted to run. witch on pump gas would be around 25psi. so i ordered the springs i needed and now my waste gate psi is 23psi.

then when i installed the mbc is when all hell broke loose. the car will over boost 30+psi. so i took the mbc apart and cleaned it out and reinstalled it. the car still over boosted. so i was told to try a softer spring. i installed that and no help. the car still over boosts. i use a forge mbc and never had an issue with it till now. i cant figure out why this is doing this. any help would be great its driving me nuts.

yes the mbc was turned all the way down
yes the spring was seated right
yes it was cleaned about 10 times
yes it is hooked up right.... i even tryed the other way just to make sure

so i pulled the mbc out of the car and im again running waste gate psi only right now.

anyone with any info please post up. thanks alot feel free to ask any questions and ill answer then as best as i can.

 

anyone

 

I was going to say try a softer spring on the MBC but you have already done that.

 

Reinstall the WG spring(s?) that you had originally which gave you 14 PSI WG spring pressure, and try to find another solution to your compressor surge, such as BOV solutions maybe.

 

Yea I tryed the solf spring and no change at all

I have pulled the waste gates and made sure the springs were in and seated right. They are. I just might have to run the 14psi springs witch would suck. Unless I can figure something out.

The surging was all ready figured out. I need a anti surge comp housing.

 

evodan: Maybe your WG is too small for the 35R. I realize that it's not my money but, have you considered going to a larger single gate or having the manifold flanged for dual gates?

I personally like dual gated setups because the 1st gate can be set really stiff which helps spoolup, because it is backed up by the second gate which is set to open just a pound or two later than the first gate and instantly doubles bypass flow volume.

Incidentally, what gate are you running currently? Obviously, switching to a larger single gate is a more economical solution than a dual setup.

 

Well I have 2 44mm tial waste gates. To answer the rest of your reply you would have to talk to geoff. The way the manifold is setup you can't run just one waste gate.

 

Bump

 

I have had issues with the forge mbc doing the exact same thing. I would suggest swapping it out (easy), to see if that solves your problems. You could always get a ice-maker valve at home depot for a few bucks to see if the mbc is causing the issue.

 

help dan out full race

 

few questions...

1.are you boost creeping or spiking?
2.i dont have forged mbc but on the hallman, there is a pin hole on the vacuum nipple for the turbo side. if that gets clogged it causes issues.
3.double-check the vacuum hoses for both turbo and wastegate is tight, sounds like maybe one is loose or has a hole.

 

spark plugs may have to be gapped a little more that might take care of the problem. my car was doing the same thing and i gapped them to .020 and it pulls all thw way through any gear now with no creep / popping

 

1. No its not creeping. Its an over boost/spike. Any gear that I'm in and go WOT I hit 30+psi instantly.

2. Yes the forge has that little bleed hole. No it is not clogged. Its been cleaned 6 times and regreased as well.

3. The lines that are run are or seem to be fine. I will look this over and replace them and see what happens. But I'm sure there fine.


Nyc drifter
Call me up d o double gee

 

anyone else.


lines checked out to be fine.

 

springs are completely rust free?

yeah i'd definetly swap the lines too .