Howdy guys. Very interesting subject we have going here.
Mind if I chime in a bit?
What's been said by the others is correct.
The older GTQ turbine wheel equipped turbos with our .85 3-bolt turbine housing, was decent technology back in the early 2000's when we first released it. It was superseded by the HPQ turbine wheel, which lead to our previous generation CEA 68 turbine wheel and now the GEN 2 CEA 70 turbine wheel.
Just so everyone knows, I'm working on a new turbo comparison chart in my spare time, that will show the lineage and what we currently offer today for the true bolt on 3-bolt Buick applications.
Our Precision 3-bolt turbine housings have performed very well over the years with the technology that we had to work with. Many racers have set records using our products, all the while utilizing our off the shelf Precision 3-bolt Buick turbine housings. When the original Precision housings were first introduced, we saw significant flow increases over the original Garrett .63 and .82 offerings from the mid to late 80's. There always came a point, where the back pressure becomes an issue, especially when the boost is set to orbital insertion levels. The newer turbine wheel designs have drastically increased in efficiency, as well as raised the back pressure threshold across the entire board of turbocharged applications. IE: side by sides to Pro Mods. Power levels are literally reaching insane levels in the highest classes of racing.
As of now, we offer two 3-bolt turbine housing equipped turbos that would be a direct replacement for this stroker motor combo that would displace any GTQ / HPQ equipped turbo.
GEN 2 PT6870 BB HP Compressor Cover W/ Buick 3-bolt inlet .85 A/R turbine housing. Available with and without a HD wastegate actuator.
The official part numbers are:
21607215579 GEN 2 PT6870 BB HP CC w/ Buick 3-bolt .85 turbine housing and HD wastegate actuator.
21607215799 GEN 2 PT6870 BB HP CC w/ Buick 3-bolt .85 turbine housing and no wastegate actuator.
GEN 2 PT7270 BB HP Compressor Cover w/ Buick 3-bolt inlet .85 A/R turbine housing. Also available with and without a HD wastegate.
The official part numbers are:
21907215578 GEN 2 PT7270 BB HP CC w/ Buick 3-bolt .85 A/R turbine housing and HD wastegate actuator.
21907215579 GEN 2 PT7270 BB HP CC w/ Buick 3-bolt .85 A/R turbine housing and no wastegate actuator.
Now the next question will be this... How much HP can they support?
Answer? TBD... As more and more of them show up on these specific Buick 3-bolt combos and start blowing the heads off the engines, we will find out.
In all seriousness though, the GEN 2 6870 is technically listed as capable of supporting 1100 flywheel hp. And the GEN 2 7270 fwhp rating has not been published yet. Not very many vendors know or have tried it yet with the 3-bolt housing. Or if they have, they've kept the numbers close to the chest. We do have many other applications running this turbo with out T4 .81 and T4 .96 single inlet, tangential turbine housings with great results. I will say this though... It makes serious power.
With regards to the other models we offer with our Stainless all v-band turbine housings, all I can say right now is
yes! We have a ton of options available from 1000 hp up to insanity hp levels. Our Sportsman chassis turbos, are the next upgrade in size compared to the standard T3/T4 chassis turbos that all of our Buick 3-bolt turbos have been based around. Everyone has seen this over the years in the various heads up Buick classes. And most of the serious racers know, that the ultimate limitations have always been the 3-bolt housing and the current level of technology available at the time with regards to turbine wheels and compressor wheels. We even developed the famous Cantaloupe 3-bolt turbine housing, to work with our PT88 turbo for a short time until it was banned from the class. It made some serious steam for what it was and helped prove to the racers that there was power to be made by stepping up the chassis and turbine housing sizes.
Turbocharger technology development has been on a constant upward trend over the past 10 years. Almost as drastic as computer technology development. IE: Bigger better more efficient.
I will close by saying this. We have some
Wicked turbos coming out very soon in the Sportsman chassis and Pro Mod chassis class of turbos. We are also actively building a new website so stay tuned for that. In the meantime, everyone can check out the original website located at
www.precisionturbo.net and we also have our slightly newer shop.precisionturbo.net website. It has some of our latest turbocharger offerings, our boost control products as well as the swag.
Let's keep this thread alive guys. Maybe some of the real world users will let loose with some valuable intel.
Patrick Rubio
Precision Turbo & Engine
Technical Sales Representative
patrick.rubio@Wabtech.com
855-996-7832
NEW ADDRESS:
Precision Turbo & Engine
9401 Georgia Street
Suite 2
Crown Point, IN 46307
P.S. Pics for attention and lols...
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