Took the truck out to the 1/8 mile Friday night. With the CAI, Gibson exhaust, and stock PCM, I ran 11.00 @ 66.26. Uploaded my new Diablo tune and played with shift points and firmness. With TM off and shifting quick and firm, I turned a best of 10.56 @ 68.40.
I see all sorts of options for WOT fuel and spark, injector slopes, EGR disables, etc. How do I learn more about this stuff. I barely lost to a 2000 Monte SS NASCAR edition.
I wish I had talked to Allen first.
'05 Sierra ECSB w/ 4.8L and 3.23 gears. Mods include K&N CAI, Gibson Dual Sport Exhaust, and Diablo tune.
'70 GMC 1/2 ton SB. Work in progress.
I'm not too sure how diablo is handling their tuning through the predator. In general, you'll want the a/f ratio around 12.9 and max timing. Get a wideband on there and see if the a/f ratio is close. With a scanner, check to see if you have any KR at wot.
As for shift points, raise them until the truck quits pulling, then back them down a bit.
I'd guess shift points for your truck should be around 5900rpms.
good luck,
allen
Nelson Performance
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'94 Chevy Truck: 8.9 et, 408 twins
put the Diablo on E-bay then call Allen. I ran a 16.6 stock and dropped to a 15.7 with his tune...i also have a lil 4.8 w/ 3.23 gears
...1/4 mile times
allen is the man that tune was def the best thing ive ever gotten.... i had a diablo too and sold the fucker to my friend who is to cheap to buy a good tune
1999 GMC Sierra black reg cab short bed SLE Z71 5.3 <--CARDOMAIN PICS
NELSON 93 hot tune, 02 PCM, VOLANT Ram air intake, MSD wires, ACdelco iridium plugs , Edelbrock ceramic shorty headers, jegs off-road y pipe, Dynamax int pipe, 3" Magnaflow Exhaust with turndown, EGR removal, throttle body bypass, vette servo, long servo pin, performance 4th apply piston, B&M shift kit, SLP 160* thermostat, LS1 Fans, NELSON harness, ported and polished throttle body (did it myself, for free lol)..... _______? cam is next as soon as i stop spending all my money
I second selling the diablo and get Nelsons tune!You will not be sorry you did,we all promise you that.
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