I bought a GT 35/40 kit in December and I've probably driven the car for about 3-4 months at 7 PSI and a couple days ago it failed. I was ejecting oil into the intercooler and water out the back. Has anybody experienced this also.


I have a 94 FD with GT35/40 kit, Pettit large Intercooler, Power FC, other mods.

 

could be 2 things:
1. lack of oil or the wrong oil dried up the CHRA
2. you sucked something in the inlet (dirt or etc) and broke the seal behind the wheel to the CHRA

BTW: what kind of intake do you have?

 

I have a Blitz intake on my turbo. What was kind of weird was that after a few weeks of having I noticed a slight amount of oil collecting in the bottom of the compressor side. So after 5000 miles it must have totally failed due to wrong fabrication. I also noticed that this turbo does not have any indication of being a Garrett turbo. All it has is the imprinted part on the Turbine side. For all I know its half a Garrett and the other half something else.

 

The turbo is all Garrett no need to worry if it has failed the way you said Garrett should cover it, they will need to determine the reason for failure, they won't cover frieght however.

-Sean

 

Do they cover freight if it was their problem? Where would he have to send it if it has failed? Any experience with turn around time? Thanks in advance, Carl

 

I sent it back to the dealer and he's going to take care of the freight to Australia. He did say that it will take over a month.

 

I've noticed some oil collecting at the bottom of the intake side of my compressor housing too. anyone else having this on a gt3540? turbo runs fine though. 15psi driven hard everyday.

 

I noticed the Oil collecting also. It was mimimal when I first saw it. I noticed a few months later after installation that sometimes it happened, I really don't know at what point in time it would do it because I only ran it for 5000 miles at low psi. It was just bad luck.

 

all turbos will collect slight oil on the bottom of the compressor due to:
1 PCV recirculation
2. inadaquate blow off valve
3. turbos will sometime spray a lite mist of oil during boosting

if you look at the bottom of your IC you might see some oil there.. whereever oil can get trapped it will eventually collect there.

that is normal ive seen it with all my single turbo upgrades

 

thats exactly what i wanted to hear. thanks

 

You know, we might be running too much oil pressure to turbo....

 

Yup. Garrett BB centers use oil pressure to push the shaft and bearing together. You're not supposed to run more than 60psi through the ball bearing center or else you're looking at premature failure. This usually means you need a restrictor on the oil feed line since a FD hits 90+ psi at redline.

Trivia: The big difference between the Garrett (HKS) and IHI (Apex'i) ballbearing turbos is that the Apex'i units use a sprung clip to produce constant seating pressure on the bearing instead of oil pressure like the Garretts.

 

What size restrictor do you use? and where can I get one?

 

The 35/40 has a restrictor built into the oil inlet. Take off the fitting and look.

 

correct.

 

if i may ask, how much power were you putting down @ 7psi and when did it spool up?

 

I don't really know how much power I was putting down because I still don't have a good enough fuel pump and bigger injectors to accomodate for the power. I didn't want to hurt anything so I kept the stock 7 psi spring.

I'll let you know once I get my turbo back.