more motor or more gear

pontiacmike29 · Dec 9, 2010

I have a tremec 3550 in my 94 cobra with 3.73 gears it has no acceleration in 5th gear and i have to shift into 5th before i get to the end of the 1/4 mile do i need more motor or a different gear best i ran was a 14.7 smoking the tires through 1st and 2nd it just runs out of umph when i go to 5th

Grim94GT · Dec 10, 2010

What kinda tires are you running?? I think if you could get rid of the tire spin thru first and second with a nice set of tires, therefor getting you a quicker 1/4 time.. Just my 2cents

pontiacmike29 · Dec 10, 2010

stock size wheels and tires

95opal · Dec 10, 2010

lol refresh our memory I dont think i have ever owned an SN with "stock size wheels and tires"

2slo95fiveoh · Dec 10, 2010

95opal said:
lol refresh our memory I dont think i have ever owned an SN with "stock size wheels and tires"

X2... actually the 1994 GT i just bought still had the factory "tri-bars" on them... I was like, ohh.. what are those?
ha..
To the OP, you could get a pair of 15s or 16s for the back and put some slicks on them for the track.. A taller tire
will keep you in 4th going through the traps, and the slicks will help reduce the "smoking through 1st/2nd."

5.0kid · Dec 10, 2010

^what he said!

any other mods?

castine917 · Dec 10, 2010

what rpm are you shifting at?

pontiacmike29 · Dec 10, 2010

well it dont have the stock wheels it has 17x9 FR500 wheels it has lakewood shocks in rear lowering springs with an air bag in the passenger side spring hotchkis uppers and lowers tremec 3550 performer rpm 2 intake bbk 70mm tb 30lb injectors e303 cam 1.6 scorpion roller rockers bbk cai a/c removed smog removed egr removed bbk longtube headers bbk x pipe mac catback exhaust all this was allready done to the car when i got it with the exception of the mac exhaust. i have a dss 306 with main girdle and windage tray with tfs track heat heads tfs stage 2 cam tfs 1.6 roller rockers tfs r intake not the box intake 75mm bbk tb and tfs elbow to go in the car after christmas or whenever i get the time to change it

Grim94GT · Dec 11, 2010

Well with all that said you for SURE need better tires on those 17s or a nice set of slicks. Because with those mods you should definitely be running better than a 14.7. I have a completely stock 95 GTS except for a CAI and I ran a 15.0 flat with some crappy sumitumo tires.. So try to get a set of slicks and you will feel the difference.. :headbang:

pontiacmike29 · Dec 11, 2010

yeah i for sure need some slicks or drag radials and i shift it at 6000 and I'm also very inexperienced racing Ive only been down the track 4 times i know the car can do way better than that i ran a 15.2 in my bonestock automatic 88 gt 12 years ago

OnyxCobra · Dec 11, 2010

I can't figure out how you're possibly getting to 5th gear with those mods, that would mean you're trapping like 120 or something.

2slo95fiveoh · Dec 11, 2010

OnyxCobra said:
I can't figure out how you're possibly getting to 5th gear with those mods, that would mean you're trapping like 120 or something.

X2.. now that I think about it.. My car with 4.10s and stock wheel/tire (245/45/17) size is usually 5,600(appox)rpm in 4th when I cross the line,
3.73 with stock tire size I would think you would be less than that.. But taller slicks are a must to kill 2 birds with 1 stone in this scenario.

Mntlkase · Dec 14, 2010

To much throttle body for ya setup. But anyway, you should be low 13's or better with that setup. As already said, run a taller\stickier tire. Just a hint, when my 95 gt was stock with only gears, I ran 13.885 @ 99mph. I Launched at 15-1700 feathering clutch through first, shifting at 5600-5800. And crossed the line mid 4th. So all in all, taller\stickier tire and practice

bradtheblade · Dec 14, 2010

yea sounds alittle to gung ho off the line tires dont stop spinning befrore you grab second and just keep going i have the same trans and tire set up but with 4:10's and do not need 5'th in the 1/4 so i think you just need some seat time at the track(the taller stickies wont hurt of corse)

302N20 · Dec 14, 2010

What is your trap speed? I have 3.73s with a little 26" tall tire and I'm about 124 mph through the traps at 6000. If you think your doing 6000 rpms through the traps and are going less than 124 with stock size tires, your Tach is wrong.