91blowthru

ran two passes on a rediculous conservative tune, like 12-14* timing and 10.2 a/f
1st pass
7psi-11.32 @ 121 1.75 60'

2nd pass was set at 10 psi, but because of the gears/shift points/rev limiter it shifted into overdrive and locked up the converter at about 116mph and boost creeped to almost 13psi, and ran 10.82 at 128.5...

truck weighed 3625 with me then.
hoping to get it to around 3550 this time.

1999 gmc sonoma with a lq4 and 4l80e.
motor has rod bolts, pushrods, valvesprings, timing chain and ls6 cam. 80lb injectors, 2 bar map speed density.

50mm w.g. t4 flange..
i am using a turbonetics tc78 with the 68mm f1 wheel and 1.15a/r housing. 3 1/2" downpipe with dynomax bullet dumped at the axle.
has a circle d 10.25 " 3500 stall



i want to run at least 15psi this time, im currently installing 3.08 gears,
looking to run bottom bottom 10's if its possible.

looking for any advice on tune, fuel, plugs, etc..

i currently run 2 steps colder than stock ngk plugs.
should i stay with 2 or go 3 colder?
what race gas, what target a/f and timing? (wanna stay conservative)
i only run a 255/50/16 hoosier drag radial, but the truck weight transfers and hooks very well so far.
i was considering spraying a small shot of nitrous off the line for like 1.5-2 seconds to help with the 3.08s and 60'.
i already have the wet kit in the garage.


let me know what you guys think good or bad.
thanks,
Keith