need a littel help

well i'll tell u what i got then somebody can tell me whats wrong.well i drive a 86 z28,with all kinds of goodies.I have a 355 with forged pistons,crank,and H beam rods.292 comp cam with .501 lift no split durition.Speed demon 750 carb,Team G intake,air flow research race heads with 202 intake,and 160 exhust,210 intake runners. MSD 6AL ignition box.Turbo 400 trans with shift kit and cheater valve body,strange axles eaton posi, with 373 gears.And headers with 1 5/8 primarys,and 3in collectors with duals.Before i was putin down 11.20's at the track at 127 mph. But now i just put a 150 shot of NOS and i keep brakin traction midway down the track, i tried biger slicks but can't go any bigger than 10ins. Should i try to backhalf it if it can be done,or what. I'm stumped!! And i know i picked up at least 2 seconds, but lose it when i break traction. HELP!!!!! :confused:

ya might need to downsize the gears in the rear end just a little bit. like the old saying "less is more"

Just learn how to controll it better , Find the range and work around it. I knew this girl that could burn her car all the way down a QTM and she could also lauch it at 9.5 seconds. I asked her how she could do that and it's all a matter of control.

Ps - Post some pictures of you car , I can't really visualize what you have under the hood.

ya might need to downsize the gears in the rear end just a little bit. like the old saying "less is more"
:) I'll try the lower gears ,but it's going 2 kill my gas mileage.

i thinik he meant lower as in a lower number.

progressive nitrous controler.

u didnt list any suspension peices if u did all that and havent done alot of suspension work like traction bars and stuff, if u havent done all that although im assuming u have then i would deffinatly make that next on my list

u didnt list any suspension peices if u did all that and havent done alot of suspension work like traction bars and stuff, if u havent done all that although im assuming u have then i would deffinatly make that next on my list
Sorry i did'nt list my suspension parts,but i got tube a-arms, adjustable torque arm tube upper and lower control arms.And i just got aprogressive NOS controller,it helped a lot but at 100% nos flow it still over powers the tires alittle so i might go to a 3.89 gear and see what it does. Thanks guys your hints helped a lot. :)

progressive nitrous controler.
:smokin: I just got it and it helped a lot thanks but it still over powers the tiers at 100% nos flow when i shift into 3rd ,but not as bad like before. be 4 it do it into second and 3rd. I might try alittle lower gear maybe a 3.89. What do u think. And soon i'll put up a pic for that guy that asked 4 one don't know how that will help, because i don't have a lot of chrome, that don,t make it go faster. :lol: :lol: :lol:

what gears are you running now??? because running deeper gears will probly make you bust tires loose worse. also what stall are you running in the converter???

what gears are you running now??? because running deeper gears will probly make you bust tires loose worse. also what stall are you running in the converter???
Well I'm 3.73's with a 3000 stall convertor,but I think I'm going 2 a 3.89. what do u think??

id go the other way, id drop to 3.42's