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Big Power T4 Turbo's

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Old Jan 6, 2014 | 06:41 PM
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Default Big Power T4 Turbo's
I know people know and run the PT88 which according to their website is rated to 1250hp. But has any one ran the PT8847? Rated to 1400hp.

http://www.precisionturbo.net/Street...r---PT8847/287
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Old Jan 10, 2014 | 12:53 AM
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I went with the PT8847 for the LQ4!

No where near running yet, but I found a lot of good information from google about that turbo with similar builds!
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Old Jan 10, 2014 | 06:45 AM
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The PT8847 is one bad ****. Its pretty damn big but it will make big power too
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Old Jan 10, 2014 | 07:32 AM
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I wonder if anyone is running into back pressure issues with it?
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Old Jan 10, 2014 | 08:41 AM
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Search user name SlowredZ.
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Old Jan 10, 2014 | 09:27 AM
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Originally Posted by Heavy H.P.
I wonder if anyone is running into back pressure issues with it?
yes, it's a small housing and turbine wheel for 1000+ hp. Only way I can see a pt8847 making 1250-1400 with a T4 housing is on a small cubic inch motor with a lot of back pressure. Also the PT 47/88 compressor cover isn't nearly as efficient as the larger GT47/88 cover.

Not knocking the pt47/88 just not the best option past 800hp.
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Old Jan 10, 2014 | 09:31 AM
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Originally Posted by LS1NOVA
Search user name SlowredZ.
I believe you mean user name "Jakson" for LS1tech.
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Old Jan 11, 2014 | 12:37 PM
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Originally Posted by mike13
yes, it's a small housing and turbine wheel for 1000+ hp. Only way I can see a pt8847 making 1250-1400 with a T4 housing is on a small cubic inch motor with a lot of back pressure. Also the PT 47/88 compressor cover isn't nearly as efficient as the larger GT47/88 cover.

Not knocking the pt47/88 just not the best option past 800hp.
Then why make it if it can't get the job done?
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Old Jan 11, 2014 | 01:50 PM
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811whp at 15psi is damn good imo. Never got turned up as it broke the T56.
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Old Jan 11, 2014 | 02:58 PM
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Originally Posted by LS1NOVA
Camaro Z28 Turbo 332 LS 800rwhp 15psi - YouTube

332" Turbo LS engine dyno, 1092HP 20psi - YouTube

811whp at 15psi is damn good imo. Never got turned up as it broke the T56.
Damn, what are the details on the motor?
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Old Jan 11, 2014 | 04:02 PM
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Originally Posted by Heavy H.P.
Damn, what are the details on the motor?
https://ls1tech.com/forums/forced-in...-pg-5-7-a.html
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Old Jan 11, 2014 | 04:17 PM
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Originally Posted by Heavy H.P.
Then why make it if it can't get the job done?
it gets the job done, just not 1000 efficiently. People wanting to make a 1000 are using the GT50 & GT55.
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Old Jan 11, 2014 | 05:16 PM
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It is a gt4788 in smaller housings
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Old Jan 11, 2014 | 07:05 PM
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Originally Posted by rotary1307cc
It is a gt4788 in smaller housings
Which aren't as efficient. If you want to make 1000+ type power with a T4 you should look at the Borg Warner turbos Jose at Forced induction has developed. The issue is going to be turbine wheel size. Or if you want to stay with a pt88 based turbo look at the GT91 built by Forced Induction.
Last edited by mike13; Jan 11, 2014 at 07:11 PM.
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