What is this???

[85 conversion]

bought this turbo off a member and was listed as a "71mm gtq " and was told on phone a 85 exhaust housing. after unboxing i noticed the compressor housing does not look like any pte i have ever seen and only thing on the cover is a engraving "70 TSM". exhaust has on the face thb3-80 and a A/R.63 cast into it. what you guys think!!!!!

 

[85 conversion]

O ya also looks to have a billet wheel!!!

 

[GNBRETT]

Looks like a PTE 70HPQH Buick turbo w/ a journal bearing. Billet tho dont think so? Ask Bison im sure he would know.

 

[85 conversion]

it has the machined grooves like its a billet turbo.

 

[GNBRETT]

Did the seller list it as a billet wheel when he sold it to you?

 

[forcefed3.8's]

The exhaust wheel is a GTQ. The compressor wheel looks like a 71 to me. The pitch of the fins doesn't look billet, but the little maching lines in it sure do.
TB3-80 is .63 GTQ
TB5-80 would be a .85 GTQ
TBx-68 is HPQ ( I have an HPQ stamped TB5-85 also)

 

[85 conversion]

he said he got it as a package deal with some headers and was not sure about it being a billet but he thought it might be one of the older 71 billet due to the machine lines in the compressor wheel. If it is a 71 why would someone engrave 70 TSM in the housing. It does not look like pte did it thought!

 

[85 conversion]

looks like this!

 

[RUQWKNF]

That is a PT71 GTQ, circa 2003-2005. It has a high efficiency Billet 71mm BW comp wheel that likes to make it's power from 25-38psi. It also has a GTQ turbine wheel. This has been a legal TSM turbo for years. We used to engrave 70 TSM onto them. It has the older Holset style H compressor cover with the anti surge ports. This was the style of our H compressor cover for years, until we came out with the new casting that has our Precision logo casted into it. It also has a .63 A/R Buick 3-bolt turbine housing. It had a rating of 875 flywheel hp. This turbo would typically come standard with a .85 A/R turbine housing.
HTH

Patrick

 

[85 conversion]

would the .85 housing be a better choice ?

 

[RUQWKNF]

If you can find one, yes it would help with flow, once you start pushing the turbo.
THB5-80 would be the official part number. We have not had any of those housing for a long time now though. Might check with Limit Engineering to see if they have any left.
HTH

Patrick

 

[Mike Licht]

Depending on what sort of times you expect and what you are doing with the car the 63 housing may be an advantage. Are you looking for a 10 sec streeet car or a 8 second race car?
Mike

 

[85 conversion]

id like to hit a 9.99 atleast once. I primarily drive on the weekend and do go to the track regularly.

 

[85 conversion]

would it be possible to get the newer style ported compressor housing for this turbo?? I believe its the "H" cover.

 

[85 conversion]

Limit Engineering --- email not working!!!!