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

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!

The PT8847 is one bad mofo. Its pretty damn big but it will make big power too

I wonder if anyone is running into back pressure issues with it?

Search user name SlowredZ.

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.

I believe you mean user name "Jakson" for LS1tech. :nod:

Then why make it if it can't get the job done?

811whp at 15psi is damn good imo. Never got turned up as it broke the T56.

Damn, what are the details on the motor?

it gets the job done, just not 1000 efficiently. People wanting to make a 1000 are using the GT50 & GT55.

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.