Author Topic: Precision Turbo Longevity  (Read 9477 times)

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Offline Scoobum

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Precision Turbo Longevity
« on: April 21 2018, 06:51:51 PM »
I'm calling bullshit on the thread on the other board questioning Precision turbos poor reliability. I've had this Precision 6262 journal bearing turbo from its inception. I prolly got one from the first run. I have beat this turbo to death at the track...and I checked it today when we pulled the engine and it still has zero in and out play and minimal side to side play. I use dino oil and a Wix filter and a can of EOS and change the oil and filter after every 2 day race weekend.
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Offline Steve Wood

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Re: Precision Turbo Longevity
« Reply #1 on: April 26 2018, 04:49:05 PM »
Some versions 20 years ago had problems and Harry was well known for blaming the customer for problems.  I have not heard of any modern day problems.

If you did not have a Turbosaver, it was your fault, automatically.
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Offline Forzfed

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Re: Precision Turbo Longevity
« Reply #2 on: April 26 2018, 05:42:54 PM »
There isn't really issues with the sleeved bearings it is the ball bearing units.  I've had friends that blew units up, most of these guys ran 4 cylinders.  I did a search on lots of forums and they all showed how crappy the PTE turbos were built.  The ball bearings are the size of a bb.  There were turbo builders that tore a PTE and did a direct comparison to a Garrett and the ball bearings were twice the size in the Garrett.  They also listed other short comings and there were many of these posts on numerous forums.  I found it funny how Bison said he rebuilt the one guys but got rid of the ball bearings. :hmm   And it's funny how lots of these posts slowly start disappearing when PTE comes on board! :(

Offline reality

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Offline motorhead

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Re: Precision Turbo Longevity
« Reply #4 on: April 27 2018, 03:11:47 PM »
My T63E lasted forever at 30psi and tonnes of mileage.

I just bought a $178 "GT45" turbo off eBay - it has journal bearings and is proven. It is essentially a PT67 compressor with an PT88ish hotside.

Billet wheels and ceramic ball bearings are not worth the cost for a moderate improvement in performance, IMO.
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Offline reality

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Re: Precision Turbo Longevity
« Reply #5 on: April 27 2018, 05:16:09 PM »
Come on Mike- if it does not cost $1,000 it will not work on a buick. every body knows that,

Offline daveismissing

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Re: Precision Turbo Longevity
« Reply #6 on: April 27 2018, 05:33:58 PM »
My T63E lasted forever at 30psi and tonnes of mileage.

I just bought a $178 "GT45" turbo off eBay - it has journal bearings and is proven. It is essentially a PT67 compressor with an PT88ish hotside.

Billet wheels and ceramic ball bearings are not worth the cost for a moderate improvement in performance, IMO.

Tell mee that is not the retail price
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Offline earlbrown

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Offline TexasT

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Re: Precision Turbo Longevity
« Reply #8 on: April 27 2018, 06:51:36 PM »
If that had a three bolt flange I'd buy one to try out . Maybe I need to weld a four bolt flange on a header and go for it.
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Offline daveismissing

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Re: Precision Turbo Longevity
« Reply #9 on: April 27 2018, 07:13:04 PM »
Nick is running a 4 bolt. I'm sure it will become acceptable soon...
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Offline motorhead

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Re: Precision Turbo Longevity
« Reply #10 on: April 28 2018, 11:27:34 AM »
There are more than a few guys running 9s with these GT45s.  Making an adapter flange would be easy enough.
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Offline TexasT

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Re: Precision Turbo Longevity
« Reply #11 on: April 28 2018, 11:49:18 AM »
I'm not real worried what others think, just the work involved in putting on a different flange and getting the exhaust and waste gate figured out.
Rich

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Offline nocooler

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Re: Precision Turbo Longevity
« Reply #12 on: April 28 2018, 11:51:55 AM »
Not quite pt88 turbine as the 88 has a 83mm exducer and the gt45 is a 77mm.

So the eBay gt45 is a 68/77. It works well on small v8s, as it runs out of compressor before turbine. I’d think it’d be a laggy sob on a 3.8

All my dealings with pte was around the time all the pt5x series turbos we’re eating turbines. After 2 failures in a row on a friends car I had him send it to limit engineering and the issues went away.

IhaveaV8

Offline motorhead

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Re: Precision Turbo Longevity
« Reply #13 on: April 28 2018, 12:46:30 PM »
I was generalizing. ;)

But, since my flavour of turdbo LS is 5.3L or less it makes good sense.  The 5.3L I built over the Winter has half-assed ported small-valve heads and an LS6 cam and ported LS6 intake so that will help the situation. The 4.8L I have on the floor is getting a healthy cam, some stock 241s, and a TBSS intake.

In either form they suit the GT45 turbo well. 

So, if you are doing a 4.1L+ Buick V6, these GT45s would keep up alright. Employ some spooling tricks and it'll do alright by you.

EDIT: New muffler showed up today.

« Last Edit: April 29 2018, 10:37:32 PM by motorhead »
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Offline daveismissing

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Re: Precision Turbo Longevity
« Reply #14 on: April 29 2018, 11:01:18 PM »
OK, I'm seeing $130 turbos on the bay. Are there compressor maps for this stuff?
It would be quite funny to take a far east intercooler and turbo and be competitive in our elitist circles.
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