GMC SKI

Hey guys finally got the V band clamp leak issue sorta fixed for now

Let Start by saying the truck idles nice and starts pretty good the first shot still need to so some cold start work

We strapped it down and got things rolling
everything seemed ok for our first pull on the wideband so we decided to go for one full pull
It netted us a 441rwhp and 396rwtq not too shabby but way rich
the wide band was stuck on 10.00
there waas tonnnnes of fuel for the base pull
Fuel preasure was at 58psi at idle and went up too 78psi under load
this pull was with 8psi

I tried taking some fuel out via LS1 edit and did a few more pull still too damn rich but gettin a little better
Anyhow i noticed on EFI live that was dropping masive amounts of timing from 3700rpm i'm at 17.5deg and then it proceeds to drop too 3degrees at 3900rpm ???? then it slowly climbs up to 13.5at 5500rpm
I can't understand why there is no timing there ??

Anyhow i tried adding timing to the hgh octan tables but it wasn't working
i managaged to pull some fuel to squeek out a 10.5 air fuel still pig rich

The last pull netted us a 521rwhp and 470rwtq with 14 psi
The maff maxed out at 4700rpms at 60lbs

I think if i can figure out why there is no timing there between 3700 and 6000pm

There is some Video of the runs that I'm putting together and wil try to post

All in all I drove it and it drives nice and sounds pretty damn good
Just need some tuning damit ..

Jim

White_Hawk

iTrader: (3)

The first thing I would look at is spark knock. Were you scanning for it while it was on the dyno. Also, with a rising rate regulator, your injector curve should be flat, not running from low to high like the stock table on a returnless system. Lastly, is COT turned off? I've forgot that myself before.

Post any efi live logs if you have them, too.

-Geoff

GMC SKI

I had Zero KR on the runs to start off
I logged all the run Via EFI live
The truck fuel system is a send return setup with the Fuel presure ajusment at the rail
Cot is turned off and i have no cats
I'll see if i can post the efi log somehow

MIGHTYMOUSE

iTrader: (59)

your changes to the high octane table werent working probably because your truck was running in the low octane table... copy the high to the low table so you know where youre at.

GMC SKI

I think i have the issue figured out I gotta put in my fuel/water cell for my air/water setup
It's pulling timing due to the hot air charge
he's a vid of the dyno run and the link in the truck foroum
https://ls1tech.com/forums/showthread.php?t=174192
http://www.transamws6.net/Movies/JIMSKI-UNTUNED.mov