Supercharged 8.1 Suburban - 407hp/557 ft-lb torque

tbyrne · October 14, 2003

I finally strapped the Suburban down to a dyno today and was rewarded with 407.2hp and 557.8 ft-lb torque. I think I might be able to find a littlle more horsepower with some more tuning. My goal was 400 rear wheel so I'm happy with today's numbers. The truck will be going to the track next week. The ET goal is low 14s but a 13.99 would be perfect!

Tom

tmf6902 · October 14, 2003

That's with the Whipple supercharger, right? with 6# or 8#?

opg4 · October 14, 2003

I think if I am not wrong its the 8.1 big boy. d**n those are great numbers

CMNTMXR81 · October 14, 2003

He meant 6 or 8 pound setup on the S/C.

Nice numbers Tom. You know you're NOT making this ANY easier on me. I want to S/C mine sooooo badly, but I have a new toy coming I have to think about.

silverado man · October 14, 2003

Sweet numbers man.

tbyrne · October 15, 2003

The kit makes 7.5# of boost. I have a smaller pulley that will get me into the 8.5# range but I'm happy with the way the truck performs with this one. Plus I don't want to blow it up

CMNTMXR81: I think you'll let your new toy. You'll be able to upgrade it at www.ls1gtoperformance.com soon

tmf6902 · October 15, 2003

that is veeeerrry sweet. I'm saving up for a supercharger install this summer, I still havn't made up my mind yet for the Kenne Bell or the Whipple. But I have atleast another 9 months to a year to get all the info I can. I've heard good and bad things about the whipple, but the KB is fairly new so not many people are running it. We need a gm-trucks.com guenie pig!!!!!

Hey tbryne one question for you, I it may have been asked before, but HOW THE HELL do you change your plugs....looks awful tight in there????

tbyrne · October 15, 2003

They really aren't to bad. I passenger's side can be done in 5-10 minutes and maybe about 20-30 tops for the driver's side. I don't spend much time at the gym so I can get my arms in there pretty easy

8100HD · October 15, 2003

Nice numbers, Tom!! You got about 100 ponies and 100 ft/lbs on me, will have to compare numbers when I get the KB in the spring.

CMNTMXR81 · October 15, 2003

Oh, I'll get it, but the car hasn't even been assembled yet and CMNT is blueprinting a nice little 427 stroker for it.

Money....easy come, easy go.

tbyrne · October 15, 2003

I figured this comes out to be about 520hp and 712ft-lb with a driveline loss of about 28%. This is how GM should send them out of the factory

manytranny · October 15, 2003

What kind of mileage are you getting?

Sounds like a beast...Knocking around a well chipped duramax range...

tbyrne · October 15, 2003

It doesn't have Duramax mileage though. I usually see between 11-12 for a mix of city/highway driving and high 7s for all highway while towing an enclosed trailer.