Ok gang here is my list of current mods that i have. Sindle program superchip,90mm,jdmcold air, 4lb lower,phanolic spacer, afco heat exchanger, boost bypass oil breather, line mod, traction bars, et streets 28x11.50x16 with a full dyno tune at 398 rwhp and 499lb in 89 degree weather. I still cnat get into the 12's my closest run was a 13.009 at 105 mph. my 60 was around 1.93 and i know i can run a better 60' but my tract isnt the greatest here. Finally my question too all of you guys is that i am on a tight budget and i was wondering what my next couple of steps are to get solidly into the 12's?

 

I found that the Accufab Single blade was worth 13 HP and that it improved driveability as well. Easy install and looks good too!

 

You definatley have the power my numbers are almost the same 402/502 and run 12.5x-12.7x depending on air temp and traction
I see you list a 90mm MAF sensor is your truck a 99-00 if so I think the slicks are hurting you try a smaller tire or get bigger gears you have 3.55's if you drop to a 26" you will be close to a 3.73 wich is what 01-04's have
Just my opinion but power looks good 60's aint to bad but MPH is way down I was running 103 stock and now about 109 w/ 26" slicks which is hurting me in the wrong drirection i need a taller tire
Good luck
Slick

 

I would say upgrade the blower, port it(Apten), MP or KB. Also maybe an electric fan. Is traction an issue at all?

 

lose some weight on a cold night.

 

i lost about 275lb in the lightning with the spare out trailor hitch off and tailgate off. traction is an isssue sometimes thats why my best 60' was 1.90 im heating them up real good but maybe i have too much air pressure. but for your answer slick that does make sense but i only have single chip and im affraid that a 26 will be too short and i might top out to soon.

 

Do you know what program code your chip is? I have similar mods and am finally going to dyno a week from sat.

 

Upper pulley

I know it only gives you 1 to 1.5 lbs of boost, but it will allow the supercharger to spool up faster.

Your so close thats all you would need

 

what's you a/f on that tune?? Your dyno number seem about average for your mods.

I can run 12.9's all day long with my truck with similar mods and 60 ft times, even in the heat. My truck has run as fast as 12.71.

 

Then why not replace the 4 lb lower with a 6 lb lower instead?

Until you are out of lower pulley choices, I see no logic for messing with the stock upper.

 

my computer code is cux1. and for the second question my air fuel was a 12:1 flat across the board and to be exact my dyno was 398.72hp and torque was 497.54 without my phnolic spacer in.