• Welcome to The Truck Stop! We see you haven't REGISTERED yet.

    Your truck knowledge is missing!
    • Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
    • We have tons of knowledge here for your diesel truck!
    • Post your own topics and reply to existing threads to help others out!
    • NO ADS! The site is fully functional and ad free!
    CLICK HERE TO REGISTER!

    Problems registering? Click here to contact us!

    Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!

Bracing Holset and CKO after install

Supposedly the harmonics were just with the GMx turbo's that needed the brace. Testing from the ATT has shown it doesn't need a brace. There should be enough testing with other turbos to also answer this as not needed.
 
I'm curious how you'd even do it since the intake has to be cut, I had to cut past the mounting point for the stock brace, and my turbo doesn't have a mounting point for a brace that I know of. I'm thinking it's not necessary.
 
Let me rephrase it... I haven't busted the turbo off the engine ATT or HX40II with over 100K combined miles. I have busted alternator brackets (and more stuff than I care to admit) even with a rear alternator brace. Leroy has one upped me by busting an alternator clean in half without a rear brace and even he doesn't have a turbo brace that I know of on his ATT setup.
 
HX40 clocked for CAC 001.JPG There are 2 machined holes at top of turbine housing one of which I could run a custom brace up and over to the center intake mount of old brace.
 
Hmmm, I can see the validity in removing as many potential vibration sources as possible from an assembly that supports a rotating component spinning somewhere in the 100,000-150,000 rpm range.

Your call though. I've had in "unsupported" gm8 on a hard running rig for some time now with no evident ill effects.

That's not to say it doesn't have an effect on it. Just that I haven't seen any.....yet.

:)
 
As the GM8 has 2 braces one at compressor outlet which is commonly removed showing no ill effects however the other runs from top center of intake to top of turbine housing and I some concern over that one. Everything I read about the turbine brace is related to supporting/distribute the weight of the turbo so input from those who don't use braces is a good indicator for the yes/no factor.
 
I don't use one (yet) on the ATT. If you can fab one up easily go for it, can't hurt.
I'll prbably run some kind of bracing on mine with the P400 swap though.
 
Best I recall the reason given, from the ATT folks like Dennis, for the brace was a harmonic vibration that the GMx turbo's had. The ATT doesn't have this. Consider the GM turbo is running near it's redline although the lower boost 1993's also were braced. YMMV on other turbo's. Mine was ok without (HX40II) and I put it through the wringer testing. Even put a spool valve on unbraced.
 
You must log in or register to reply here.
Back
Top