RickLowpez

well 85 deg.weather,08 rcsb gmc 91oct tune. full bolt on 220 high lift cam , 3500( break stall 3200) edge converter,373s, 28 m/t and only a 1.94 60ft. but went 13.35 at 103.6 mph. all night 103 mph so i was happy on that but not the 60ft. i tried different rpms also but nothing worked . so do i need 410 gears? bigger stall? what could it be? need suggestions asap

ap2002

iTrader: (8)

weather is too dam hot right now for you to expect good 60's, i bet your IAT's are way up there when you launch, which will pull timing netting shitty 60's,

on the good note, the mph sounds very promising, and i would definately do the 4.10 gear swap...

RickLowpez

ap whar rpm r u doing at,70- 80 mph with stocks?

ap2002

iTrader: (8)

stock 17" tires, im at 2150rpm @ 70mph

RickLowpez

so at 80 ur at 2400 or so?

circusboy

iTrader: (2)

my best 60 ft. was 1.88 with 26" MT's. My best 60 ft. on stock tires was a 1.9, lol. I wish mine would launch better too, I think with colder weather we will both be real happy

RickLowpez

may be 411s and a 3800 stall will fix the problem

silver-mod-o

iTrader: (15)

Your converter isn't the problem... Weather and gear are.

RickLowpez

dude it didnt seem that hot all runs were made in 80-90 deg weather.104 was the high 4 the day.it didnt seem hot

BlackPearlZ71

iTrader: (1)

try smaller slicks Rick.. some 26s or 27s, you'll get a better launch out of them... try that, and check your pinion angle.. maybe it could be off and that also affects your 60fts.