black_ws6

MT ET street radials (255-50-16) with a stock 10 bolt?

I know it's not a good idea, but I can't shell out 2K for a 12 bolt right now.


Edit...I guess I should have put this in drag racing tech.

Rare96WS6

I've pulled off some high 1.6's and low 1.7's launching at 2000rpms, but mine is an auto. it is really hit or miss. Some hold up well and some do not. I've seen 6 speed cars break with stock power levels from 2500rpms and have also seen some 10 bolts hold up to 400rwhp dumping the clutch from higher than that. If you don't have the money to rebuild then it might be best to take it easy until you do. What if your 10 bolt is one of the duds?

black_ws6

I am pretty good friends with a guy that has a garage / salvage yard. I could pick up a stock 3.42 10 bolt pretty cheap if something happens.

Rare96WS6

I guess you can take the chance then. The guys I know with stock 6 speed cars seem to get good results it the 2200-2600rpm range.

black_ws6

Thanks. I'll find out tomorrow. I was thinking a 2500 dump for my first run.

BlueSix

Slipping the clutch will help save the rear...

black_ws6

I tried to launch at

2,000 - 2.2 60'
2,500 - 2.1 60'
3,000 - 2.0 60'
4,000 - 2.0 60'
4,200 - 2.0 60'

The tires hooked and then the car bogged really badly. I ran .02 faster than last year and I went from a TR220 to a TSP 231/237. I even lost 2 MPH. I went to the track hoping for 11's so I am pretty pissed.

Vortec5300

BlackWS6, check this thread out..I feel your pain.

https://ls1tech.com/forums/drag-racing-results/307878-wtf-my-cam-only-turd.html

Vortec5300

BTW we need to check stories, maybe we are on to something. You said you lost 2 mph, I am missing about 2-3mph atleast. I am thinking its the lack of low to midrange power. Its killing the 330s which is killing the 1/8 mph. Thats where the missing mph is at. Gimme the stats on your slip.

Coach 02 A3 Z/28

iTrader: (10)

Post up your slip or just the numbers off it. We'll check it out and see if we can tell anything.

Coach

SScam68

iTrader: (20)

fwiw I dump the clutch at 6600rpm off the rev limiter, stock clutch and stock 10 bolt. This on slicks. 60' is in the 1.98-2.0 range.

I am down ~80hp from you sea level guys but 6600 rpm clutch dumps can't be good at any power level.

black_ws6

First off, thank for the replies.

Here is the slip:

60' 2.006
330' 5.492
1/8 - 8.313
MPH - 86.66
1000' - 10.724
1/4 - 12.733
MPH - 111.38


Here is my best run last year before the new cam and slicks.

60' 2.040
330' 5.549
1/8 - 8.365
MPH - 87.25
1000' - 10.760
1/4 - 12.754
MPH - 113.42

SScam68

iTrader: (20)

What was the difference in weather?

If the slip has a date and time you can look it up at www.weatherunderground.com .

FWIW with the exact same setup except 200lbs lighter I was running the same E.T's and traps. The difference was 30 degrees in temp and a higher humidity....

Vortec5300

Your second slip mirrors mine. Notice the weak 1/8 mph. Your 60' is about average but your 330' is about a half a second off what other guys are running. I think thats the missing link. SHould be a 5.0-5.10, not 5.50s, even with the same 2.0. I think these things are just bogging too bad after the dump and its killing the 330'. Thats keeping the 1/8 mph down and if its down, the 1/4 will be down. I think it has something to do with these big *** cams, just not enough low to midrange power with stock gears. I am thinking a 4.10 will help this flat spot in power but I don't see it giving us the 3-4 mph we are missing. I had almost perfect conditions to.

black_ws6

Yeah, I think 4.10's will help as well. They only thing is now I'll have to shift 3-4 and that usually makes me drop MPH. I have be leaving it in 3rd through the traps hitting the rev-limiter. I have some more tuning to do so hopefully I can get it worked out.

Rare96WS6

Get rid of the rev limiter and get the 4:10's. That way you can hold it in 3rd as you cross the line. With the gears, you should pick up 2+mph. I went with 3:73's on mine and picked up 2mph.

black_ws6

Get rid of the limiter and hold 3rd gear? That sounds like an easy way to blow the engine.

trigger1

iTrader: (28)

Stock 10bolt Six speed car here. 4k launches no bog, dead hook. So far so good. I think I might have a magic tenbolt!