Physical Size and Turbine Wheels: 7675, PT80, PT88
04-27-2011, 09:58 AM
#1
Physical Size and Turbine Wheels: 7675, PT80, PT88 More questions in anticipation of upgrading my turbo.
I know the 7675 has the 75mm turbine wheel, and it is relatively small physically.
How big is the turbine wheel in the PT80 and the PT88?
I have a good idea on the physical size of the PT88, but what's the PT80 like? Is it smaller like the 7675 or bigger like the PT88? Or in between?
I really can't find much info at all on the PT80, and I'm thinking it might end up being the perfect compromise for me.
Thoughts?
I want 140s in the 1/4. ~4200lbs, I go 134-136 on my TC76 now.
I know the 7675 has the 75mm turbine wheel, and it is relatively small physically.
How big is the turbine wheel in the PT80 and the PT88?
I have a good idea on the physical size of the PT88, but what's the PT80 like? Is it smaller like the 7675 or bigger like the PT88? Or in between?
I really can't find much info at all on the PT80, and I'm thinking it might end up being the perfect compromise for me.
Thoughts?
I want 140s in the 1/4. ~4200lbs, I go 134-136 on my TC76 now.
04-27-2011, 01:16 PM
#3
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JZ from FI posted that the PT88 had an 87mm turbine. Some guys said their PT had an 83mm. But they had older units. I've yet to see anyone personally measure and post info. It also wasn't clear whether that was inducer or exducer size.
04-27-2011, 04:09 PM
#6
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Kendall Johns (10-20-2020)
04-27-2011, 06:30 PM
#10
The pt88, pt80, and 7675 (gts) all share the same compressor cover.......... the bearing housings and exhaust housings are way bigger on the pt's though
Bearing housing and exhaust housing size are almost identical in size from the 7675 to the TC76
The 7675 has done over 900 whp on these engines, which should get your goal easy enough I would think
Bearing housing and exhaust housing size are almost identical in size from the 7675 to the TC76
The 7675 has done over 900 whp on these engines, which should get your goal easy enough I would think
04-27-2011, 07:18 PM
#11
I have both tc76, and Pt88, along with a S480 sitting in my garage right now; i can take what ever pic you need.
To go from 135 to 142 will take 130-150 more HP showing. I don't know if the 7675 will make that over a tc76. I'd call comp, and precision and see if they can do something custom that would fit.
To go from 135 to 142 will take 130-150 more HP showing. I don't know if the 7675 will make that over a tc76. I'd call comp, and precision and see if they can do something custom that would fit.
S480 is a 83mm exh wheel 1.10 T6 AR. The PT88 94mm exh wheel dwafs the S480, 83mm. The TC76 is a toy...
04-28-2011, 06:26 AM
#18
If I'm seeing the tape measurements correctly the TC76 compressor housing is about 6.5-7" and the PT88 is right around 8"? The 7675 compressor housing is the same as the PT88 right? So a 1" difference between 7675 and TC76? Nicd just went 151 mph with his 76GTS (same thing as 7675) using a 3" down pipe, but he is at 3400lb raceweight. Maxing out the 7675 should get you pretty close but you would really be better off with something like the S380R from bullseye as you will be pretty far off the compressor map with your 370.