Stock48 Lq4/GT76 finally hits the dyno...
10-12-2012, 04:52 AM
#1
Stock48 Lq4/GT76 finally hits the dyno...
I didn't think it was a big deal or anything just thought id share.. I know most people do the dyno first but I ended up track testing the combo, then beating on it a couple years then dyno lol
Combo is my 2003 GMC 4x4 Z71 with KBRacing T4 kit with GT76T4 turbo.
-2005 lq4 factory GM short block
-Hand ported stock valve 317 heads
-Isky triple 12 cam
-Arp studs/LS9 gaskets.
-Under hood is 100% factory truck acc's including intake, tb, 1 bar map, and mafs lol...
Haven't decided if I'm going to pull it and upgrade the pistons, and rods or keep flogging it... Drove truck 1.5 hrs to dyno and back home, all pulls were thru full exh just how I race. 1st pull was right off the street on my dd street tune @15~16 psi, 91 0ct/meth inj. The rest of the pulls were at a dead even 20 psi of boost, 80/20 91 oct/112 oct mix, with meth. There was a slight amount of E85 mixed in the tank about 10%. It's a witches brew I know lol.. Computer on dyno was acting up so they couldn't get me the tq, and numbers are in mph vs RPM... Last pull I let out around 5800 RPM and prior pulls went to the 6800 Limiter. Tires were smoking a little on dyno as well.. I feel numbers were pretty accurate due to track times, and trap
Combo is my 2003 GMC 4x4 Z71 with KBRacing T4 kit with GT76T4 turbo.
-2005 lq4 factory GM short block
-Hand ported stock valve 317 heads
-Isky triple 12 cam
-Arp studs/LS9 gaskets.
-Under hood is 100% factory truck acc's including intake, tb, 1 bar map, and mafs lol...
Haven't decided if I'm going to pull it and upgrade the pistons, and rods or keep flogging it... Drove truck 1.5 hrs to dyno and back home, all pulls were thru full exh just how I race. 1st pull was right off the street on my dd street tune @15~16 psi, 91 0ct/meth inj. The rest of the pulls were at a dead even 20 psi of boost, 80/20 91 oct/112 oct mix, with meth. There was a slight amount of E85 mixed in the tank about 10%. It's a witches brew I know lol.. Computer on dyno was acting up so they couldn't get me the tq, and numbers are in mph vs RPM... Last pull I let out around 5800 RPM and prior pulls went to the 6800 Limiter. Tires were smoking a little on dyno as well.. I feel numbers were pretty accurate due to track times, and trap
10-12-2012, 04:56 AM
#2
I've tried and tried, and tried with this thing and pic just keeps getting screwed up.....
#'s are 773 on street tune
and on 20 psi the 5 pulls were
1 892hp
2 897hp
3 887.5hp
4 872.6hp
5 900.6hp(with 3 ppl standing in back of truck)
#'s are 773 on street tune
and on 20 psi the 5 pulls were
1 892hp
2 897hp
3 887.5hp
4 872.6hp
5 900.6hp(with 3 ppl standing in back of truck)
