774/774 dyno sheet

Incase anyone is interested, this is the latest run on my Single turbo LT1 with 20lbs boost through a 4in exhaust/magnaflow muffler.

www.ls1speed.com/artwork/jimdyno.jpg

congrats on the numbers.......strange how theyre so close!

not interested. :p

i wonder why they are so close?

Impressive :) Are you still running the ATI 3-core sheetmetal intercooler? What are your IATs at WOT?

:metal:

Hey Jim, one question i've been begging to ask..... what size turbo are you using?


Nice numbers :bow: :cool:

Thanks guys.

Still using the ATI sheetmetal intercooler. I may try something else though.

At the start of the run, IAT's are 65deg, and ramp up to 140 by 6500. I'm not able to get much airflow through the core on the dyno though.

The turbo is an Innovative GT80BB R-trim

Jim, what A/R turbine housing are you using? Just wondering because it looks like it takes a little while to get into boost. Still, kickass numbers though! :bow:

Marty

It's a 1.32 housing. It does hurt spool, but it makes it more tractable on the street while helping the top end.

I can't argue with it being more helpful on the street. I would figure a .85 or .96 would make the best power under the curve with your setup, but then again, it'd be blowing the tires off on the street.
It's an interesting dilemma that I hadn't put much thought into. Was the larger A/R to bring boost on slower part of your plan all along? If so, that's some serious foresight you got goin'...

Marty

I ran a .85 housing on my PT-76, and It would spool up very quickly on the street up to 16 psi, but on the dyno it took until almost 5500 to get up to 16psi. Dyno's don't load the turbo like the street does.

Bill

Originally posted by SMOKNZ
I ran a .85 housing on my PT-76, and It would spool up very quickly on the street up to 16 psi, but on the dyno it took until almost 5500 to get up to 16psi. Dyno's don't load the turbo like the street does.

Bill

unless youre on a mustang dyno. i understand they can program in the variables so that it loads the wheels.

Originally posted by got_hp?
unless youre on a mustang dyno. i understand they can program in the variables so that it loads the wheels.

LOL,,,, just run it with the e-brake engaged. :p

Seriously Jim, you need to get some video coverage next time you put it up on the rollers. ;) I'd love to hear that boy spooling.

BTW, nice numbers.

Mike

Very impressive:bow: whats a quick run down of your motor? i mean it can't be stock running 20psi! I am hoping to see slightly higher numbers with a 396 and a t-88. not that i wouldn't be happy with 774!

I know you told me this before, but your turbo is more or less in the same range as a T76 but a little bigger?

Also, what were my inlet temps compared to yours?