precision tubo, Rubbish?
08-26-2012, 08:19 AM
#1
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precision tubo, Rubbish? Hi Fellas, so ive built my first ls1 tubo, it took me about 3 months, and i did all the work myself. Thanks to this forum and you guys for all the help.
So , at the beggining, when looking for a turbo, i wanted to be different from the norm here in australia, and go for a precision tubo, instead of a garret.
A mob in the US told me that a pt88 would suit me fine.
Long story short , it lasted 1000 miles and broke. I was told by precision that the back end was to small, and didnt suit my all but stock ls1.
So i was then instructed by precision to buy the pt88 47.
I was happy with this turbo, it made 700hp atw, on 14psi through a 2 speed glide, only engine mods were rod bolts, oil pump, valve springs, cam, headstuds,truck manifolds,
It only lasted another 2500 miles, and the bearings are flogged out. A well known turbo shop here in australia say that its either from not enough oil, {dash 4 with filter} or it got too hot{possibly because i have a turbo beanie}.
Is this possible, or a precision just a poorly made turbo.
I dont know if i should get it rebuilt here, {my expense ofcourse}, Or should i buy a different brand turbo.
I like the physical size of the pt8847 because its easy to fit, but id rather i didnt have to keep forking cash out to fix it.
As ive said, its making 700 hp atw, and its driven to the track, and does average, 200miles a week. Id like to make the same power, and when i build a bottom end, i would like to make 1000atw.
All your suggestions are appreciated.
I will try to post up pics and stats of my car, cheers
So , at the beggining, when looking for a turbo, i wanted to be different from the norm here in australia, and go for a precision tubo, instead of a garret.
A mob in the US told me that a pt88 would suit me fine.
Long story short , it lasted 1000 miles and broke. I was told by precision that the back end was to small, and didnt suit my all but stock ls1.
So i was then instructed by precision to buy the pt88 47.
I was happy with this turbo, it made 700hp atw, on 14psi through a 2 speed glide, only engine mods were rod bolts, oil pump, valve springs, cam, headstuds,truck manifolds,
It only lasted another 2500 miles, and the bearings are flogged out. A well known turbo shop here in australia say that its either from not enough oil, {dash 4 with filter} or it got too hot{possibly because i have a turbo beanie}.
Is this possible, or a precision just a poorly made turbo.
I dont know if i should get it rebuilt here, {my expense ofcourse}, Or should i buy a different brand turbo.
I like the physical size of the pt8847 because its easy to fit, but id rather i didnt have to keep forking cash out to fix it.
As ive said, its making 700 hp atw, and its driven to the track, and does average, 200miles a week. Id like to make the same power, and when i build a bottom end, i would like to make 1000atw.
All your suggestions are appreciated.
I will try to post up pics and stats of my car, cheers
08-26-2012, 02:19 PM
#5
9 Second Club
What is, or why the filter before the turbo ? Could it be restricting the oil supply ?
There really isnt any need for one as the main oil filter will filter the oil if taken from a suitable gallery
Is it an oil journal or BB unit ?
Ive only ever used their smaller BB units on some 4cyl engines, and they've worked superbly.
There really isnt any need for one as the main oil filter will filter the oil if taken from a suitable gallery
Is it an oil journal or BB unit ?
Ive only ever used their smaller BB units on some 4cyl engines, and they've worked superbly.
08-26-2012, 03:12 PM
#7
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08-26-2012, 04:41 PM
#9
9 Second Club
150+ traps would suggest more than 700USHP though, unless the car is very light.
Bigger turbo will generally make more power at less boost. If he is happy with the spool and how it performs, then it isnt all bad. Larger compressor will also generally mean lower charge temps for any given boost level.
08-26-2012, 05:29 PM
#11
9 Second Club
well, some dyno numbers are massively inflated compared to others so can be difficult to make comparisons.. Track performance doesnt lie though
08-26-2012, 05:33 PM
#12
Precision's quality has been going down hill for a while now. I'm local and know people who know people that work there and they say is junk. Your two failures is nothing new to people around here or around the country. We would rather use a junkyard Garrett unit or a eBay turbo haha. Person who built my turbo setup had three 116mm turbos from precision fail on them in a month. One was there fault but the rest they tried to blame on install error when brought in for warranty work.
08-26-2012, 07:17 PM
#14
You can go to yellowbullet.com search the turbo section and see what guys have been experiencing with pte turbos for a while now. I would sell it and go with something different. I have two friends with smaller pt6765's and they also have had nothing but problems.
08-26-2012, 08:00 PM
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Yes its a joural type, yes it was reccomended to me.
Other than the reliability factor, im really happy with it. It spools up on the trans brake within 4-5 seconds with a 2500 stall. Ive got the filter as i was advised to use it. But im using the old oil pressure port at the front of the engine, which is before the filter. I guess i will be changing to the port on the rear.
I just wanted to see if there was an on going problem with theses breaking down.
Cheers for all the replies.
Other than the reliability factor, im really happy with it. It spools up on the trans brake within 4-5 seconds with a 2500 stall. Ive got the filter as i was advised to use it. But im using the old oil pressure port at the front of the engine, which is before the filter. I guess i will be changing to the port on the rear.
I just wanted to see if there was an on going problem with theses breaking down.
Cheers for all the replies.
08-30-2012, 10:05 AM
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I just thought id update my findings with this turbo.
With our ls1's here in australia alot of the sumps have the hump on the front, and the oil filter on the front. Above the oil filter , there is a provision to get oil pressure to the sports models that have a sports gauge on the dash, different to the oil low light.
This is the port that ive been using for 8 months now, and after the first pt88 blew up beacause the wheels were pushing forward, {wrongly reccomended by precision dealer},
the current pt8847 lasted about 3000 miles and the bearings packed it in. Apparently , not sufficient oil.
On the same side of the sump, at the rear, there is another port from which you can get an oil feed, its actually joined insid the sump to the fron port, BUT ive just found out that the rear port shows, and has twice as much pressure than the front port!!!
I dont know why, but its a fact, This is most probably why tyhe turbo failed.
So my apologies to precision
With our ls1's here in australia alot of the sumps have the hump on the front, and the oil filter on the front. Above the oil filter , there is a provision to get oil pressure to the sports models that have a sports gauge on the dash, different to the oil low light.
This is the port that ive been using for 8 months now, and after the first pt88 blew up beacause the wheels were pushing forward, {wrongly reccomended by precision dealer},
the current pt8847 lasted about 3000 miles and the bearings packed it in. Apparently , not sufficient oil.
On the same side of the sump, at the rear, there is another port from which you can get an oil feed, its actually joined insid the sump to the fron port, BUT ive just found out that the rear port shows, and has twice as much pressure than the front port!!!
I dont know why, but its a fact, This is most probably why tyhe turbo failed.
So my apologies to precision