Garrett Powermax turbos

[thaile]

Hey I was wondering if anybody was running these ball bearing powermax turbos on their cummins and if so. How they liked them. I will go ahead and admit that I don't know anything about these except that I was looking to upgrade turbos and was wanting a little more information about them. Like what are the different sizes of compressor wheels available on these turbos and what horsepower they are good for. The guy I am looking at says that he has one with an 88 compressor wheel which seems really big since the other turbo I was considering was A K-31 hybrid turbo from Industrial Injection. Information about either of these turbos would be appreciated. Thanks.

 

[WUnderwood]

tell us what you have done to your truck by filling out your signature, and that will help us out a lot. I think anything with a 88 mm wheel will need some serious fuel to spool it.



hope this helps

 

[jwilliams3]

Thats 88 at the exducer not inducer.

 

[thaile]

What size are they on the inducer and how well do they work.

 

[zstroken]

Check out HTT's website they put the HTB2 series into those numbers. I think the sp66 is like a 90+. For the money I would stick with an HTB2. THe ballbearing chargers spool great, but are expensive to repair, and don't seem to handle the high HP like the others.

 

[RCenters]

What size are they on the inducer and how well do they work.

around 67/88 on the garrett



They say dont go over 40lbs , if they have big shafts and thrust bearings they should b ok

 

[mhuggler]

If you know the compressor trim, you can calculate the inducer size. Unfortunately, I can't remember the formula offhand; anyone?

 

[RCenters]

TRIM values are expressed as 45, 50, 55, etc... and can only go from 0 to 100. A value of 100 means Dp = Dg

A large TRIM indicates a large turbine diameter.

A TRIM of 55, gives 10% more caudal than a TRIM of 50.

TRIM is used in the same way for turbine wheels as for compressor wheels.

TRIM is calculated through the following formula.





TRIM = ( Dp / Dg )² x 100

Si Dg = 50 mm y Dp = 35 mm

TRIM = ( 35/50 )² x 100 = 49

 

[jerrethomas]

so in theory, how would these turbo's compare against a phat shaft or a HTB2 turbo. Have access to both but don't know which one to get. Garrett says there stage 3 will do like 370 horsepower over stock which seems pretty good to me, but what scares me about the garrett is that not to many people are running them.

 

[BradyWilliams]

We also stock the Garrett turbos and they look ok. The reason they don't want over 40psi is that the ceramic ball bearings don't hold bigger pressure very well. Edge may have some knowledge here.