Well... Only got to make the one pass tonight. The Clutch got kind of stuck after the burnout when I was going to do the second pass. It was weird. THe pedal felt fine but the clutch wouldn't disengage so I could put it in gear. The burnout went fine and the car hopped right up to the staging lights. I clutched it so I could tickle the car into the staging beams but it was acting as if I'd never pressed the clutch pedal. I had to be pushed back off the track. Once there, with the motor off, I put it in reverse and cranked it. It bumped a couple of times, then caught and I backed it into the pits. After that, the clutch made a few 'inappropriate' sounds like squeals but returned to functional status. WTH? Anyway, on the one pass...
I'd ran out of time and didn't get to unbolt the front sway bar. I also didn't get to swap out the stock LCA for my BMR. This caused the 245x50x16 Nitto DR's to do some wheel hopping. I *did* the short 1st to 2nd shift and 2nd gear felt flat wonderful, then I shifted to 3rd and 4th normally but the acceleration felt a bit flat so I let off before the end of the track.
Result:
Reaction: 0.135
60 foot: 2.017
330 ft mark: 5.417
660: 7.941
MPH1: 108.52
1000 ft. Mark: 10.041
1320 ft mark: 11.876
MPH2: 119.86


The time slip is so grainy it's hard to see and I'll post it in a minute. The Cobra beside me thought he was going to hand me my head. I think once I got into 2nd gear, he had a rethink moment. Looks like he let off and coasted...
Here's the pass. Please forgive my wife's shaky camera work (Think Blair Witch), lol..

http://www.youtube.com/watch?v=O70nJ42L1WQ There's no need to watch after the 13 second point.
You'll notice some 'stuff' coming out of the exhaust in 3rd and 4th. I don't know if it was running lean (max PSI for the run was 14.4) or rich. I have a wide band in the pod but I didn't look at it. The car wiggled a bit in second and I was focusing on that. Like I mentioned, acceleration felt a bit flat in 3rd and 4th. I'll have a look at the plugs and take a 3rd gear pull to watch the wide band and see if I can determine what's going on.
It sure felt great to be racing on the track again after a 5 year absence.

 

the car is flying to do 108mph by half track!!! You typically gain 28-30mph with turbo cars in the back half. If I remember correctly, when justin ran 10.8 @ 128 he only had 100mph 1/8th!

 

I suppose it could be that. I have new heads(Canfields) and gaskets ready to go on.

 

you may have jacked up yourclutch, i had the same thing happen to my centerforce duel friction in my old car, the springed weights let loose and it was always engaged.

 

Damn 108 in the 1/8th is MOVING, that should go 136+ in the back end.

 

Sounds encouraging! Thanks for that input. This is still with the untouched mail order tune too!

 

What are your next steps for diagnosing the issue?

 

He said he lifted on the back end.

 

Oh snap, I missed the lift part... I thought perhaps it didn't pull through the second half!!! That changes alot... definitely could be more clutch related.

 

Bet its clutch smoke... could be something else though.

 

That is hustlin' ! I'm pretty sure you will see the north end of 130 + after you sort out your clutch / tuning issues

 

Thanks! I'm putting a built Th350 back into it. The tranny should be here in a week or two. Just gotta figure out what TC of Vigilante's to go with. I'll give Precision Industries a call tomorrow and give 'em my specs/setup and see what they recommend.

 

Dave,

Shoot Justin a PM and get his opinion. He has runs a number of TC's with a TH400, turbo and nitrous experience, he can offer advice!

Jon

 

Okay! Thanks for the tip
Which User ID does Justin go by?

 

post #5 in this thread

1982z28with18s