I think I seen that his turbo is a GTS76, which is good for more then a standard t76.

 

Your Precision T76 might be better than my Turbonetics T76. I could see 1150HP at the flywheel on a smaller engine with good heads and 20+psi of boost. I know Precision turbos are really good units, I could be wrong but 800-850RWHP on 408/76MM turbo would be pushing it to the max. The PT88 would be laggy but would feed that 408 to 1000+RWHP, and 20+PSI. If you can make over 20PSI, and 1000RWHP with the Precision T76 I will have to have one. As for the track times I know that you are AWD 5500LBS. Those heavy wheels are going to hurt, and need to go, but I still think a 4000RPM 14PSI launch with 4 light weight 28" tall ET streets could go low 11's to high 10's with that 408. Im also running a power sucking 4L80E/ Autotrack transfer that spinns the front driveline all the time. You could allways pull the front shaft on the dyno.

 

My T76 is not a std unit either. It is one of turbonetics high end water cooled, BB units rated at 1100HP. I think I can make about the 700 corrected RWHP at sea level but that's about it. I would say 800 at the absolute max.

 

Seams strang.. I could hit 15 psi with a gt-67 on my old 6.0, didn't matter if I was at 4,000 foot or sea level, though it did spool better at sea level. Hell, I hopeing it will do more...
Tuning dependent, I think you'll be in the 800 rwhp park. add meth and some cam specs maybe higher...

 

The Dyno is at 6200', and my house is at 7000'+ elevation where I do my testing. There seems to be a big drop off in boost from 5000' up to 7000'. I can hit 18-19PSI easly down in pueblo, 4700'. I have to be careful down there my AFR goes to 12.5+. I hope my new forged 6.0l with a 220/220,.555''/.555'' , will get me there. I will also be up grading from a 2.5" log/3''DP up to a 3" log/3.5" DP as soon as I get some $ saved back up. My Dmax will also make another 2~3psi down there also.

 

The monster is almost done. Hoping to pick it up Friday. It should be dynoed Thursday anybody wanna guess what its gonna make?

Will post dyno sheets as soon as I get em.




https://www.performancetrucks.net/fo...=411978&page=2

 

My guess is 630 rwhp and 700 rwtq. I think you should see low 12s or high 11's in your suv.

 

Teaser shot, just for you James You can see the rest in person....



Ok, one more.... Here is the "FBI" spec, blacked out grill

 

any more pics ?

 

Looks sweet cant wait to see some more pics