Broke my PTE GT47-88 (pics added)
10-03-2008, 08:49 PM
#61
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Neil
10-04-2008, 09:26 AM
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10-04-2008, 05:17 PM
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10-05-2008, 09:02 AM
#66
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I'm over my turbo breakage, I'll rebuilding over the winter.
But those guys running these GT47-88's, I think you should get part numbers over to Jose or Dr Turbo, take pics whatever, and make sure your unit is gonna work.
But those guys running these GT47-88's, I think you should get part numbers over to Jose or Dr Turbo, take pics whatever, and make sure your unit is gonna work.
10-05-2008, 11:06 AM
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10-05-2008, 04:13 PM
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I've been flogging the crap out of the "old style". Had a coupler come off first pass last night but got it all buttoned up and went 5.72@126 @3280lbs Same turbo has been 6.0@117 in my Lightning at over 3600lbs too.
10-07-2008, 12:57 PM
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I just got off the phone with Precision. They said, that Garret changed the design but both versions are rated at 1500 hp, and unless you have a backfire or are running without a blow off valve, or have excessive backpressure or a problem with the rest of the turbo kit, there is not a general problem with these turbo's. They have sold hundreds or either version, and there is not a recall or a stated problem with either design. So... take it for what it is worth. I think I will just run mine as is.
10-07-2008, 01:07 PM
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I am biased, because of a turbo from precision years ago, that later I found out was doomed to die no matter what....and it did, and did and did......(Ironically similar to this story)
But, if its fine...........why would it be changed? HHHmmmmmmmm
and a rating is worth about as much as my used tp.........just today, mcleod told me that their 800 hp clutch wouldnt work with 600 hp vette.
But, if its fine...........why would it be changed? HHHmmmmmmmm
and a rating is worth about as much as my used tp.........just today, mcleod told me that their 800 hp clutch wouldnt work with 600 hp vette.
10-07-2008, 02:11 PM
#77
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I'm running a 50mm Tial BOV, no backfires. No problem, I'm over it. I know it killed itself when I dialed up more boost, I'm moving forward. Can't seem to find a good deal on a PT 88/98 so I'm looking at a slightly used Innovative 88/98 that I would then send to Jose for a inspection and freshen if necessary.
10-07-2008, 06:23 PM
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Was talking to one of the PTE guys for a while, he felt that the turbo croaked from being over spun and that the backpressure might have been way too high. Given that I was only running a 348ci, I'd say those guys running GT47-88's with 348-408ci setups might want to call over there and see what they say regarding backpressure. Seemed to be saying that I would have been okay with smaller cubes but heck that's like running a darn 5.3 truck motor.
and fwiw, I was running the old version.
10-08-2008, 06:27 AM
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Just to clarify John, when the shaft broke was the blow off valve getting a good vacuum signal?
It sounds like a case mean turbo bark if that's the scenario. I wouldn't blame the turbo necessarily.
Running at a high shaft speed (high boost) didn't help the cause, but when the throttle closes the the BOV doesn't do it's thing at 24psi you're going to have serious compressor deceleration. This is very hard on all parts (bearings, shafts).
just my $.02,
Nick
It sounds like a case mean turbo bark if that's the scenario. I wouldn't blame the turbo necessarily.
Running at a high shaft speed (high boost) didn't help the cause, but when the throttle closes the the BOV doesn't do it's thing at 24psi you're going to have serious compressor deceleration. This is very hard on all parts (bearings, shafts).
just my $.02,
Nick
Last edited by VORTECFCAR; 10-08-2008 at 06:34 AM.