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-   -   H-I-J '76 Nova re-fit. (https://classracer.com/classforum/showthread.php?t=67661)

Nmbr1GMfan 09-30-2019 08:36 PM
Re: H-I-J '76 Nova re-fit.
 
Quote:
Originally Posted by FireSale (Post 598859)
If you have a trusted line lock or transbrake button to spare, wire it in place of the factory button to eliminate a failed switch as the issue.
If that still fails, wire a switch to the alternate contacts mentioned in the manual. It's possible the factory trigger circuit (blue button circuit) is faulty in the box.


EDIT: BTW, that switch is a $13 part.
I'll have it out to work at it later this week.

Bob Gullett 09-30-2019 08:39 PM
Re: H-I-J '76 Nova re-fit.
 
Quote:
Originally Posted by Nmbr1GMfan (Post 598860)
Mark, by an outsiders obsevation it seems you're quite a revered member of this site, with that being said, maybe you shouldn't comment about things that may derate your classracer social status. In other words, everything you said is wrong.
Hey Todd. Watched the in car video and Autumn did everything right including the burnout. The burnout you can do in 2nd or 3rd. Doesn't matter. I've made enough runs on mine to know missing a shift point (which I've done lots LOL) unless you hit the limiter will maybe affect ET a few hundredths. She's doing good and will get better and more comfortable with seat time. Getting a clutch to be perfect can be tough. Once you get the racepak working it will be an amazing tool to make sure the clutch is working as it should. Have enjoyed following the build of the Nova.

Nmbr1GMfan 09-30-2019 08:41 PM
Re: H-I-J '76 Nova re-fit.
 
Quote:
Originally Posted by gsa612 (Post 598862)
FWIW,going by Wallace calc.your 1/8 et (7.27) and (93.50) mph says your 1/4 should be 11.55 at 115 which seems reasonable.That would be a big jump from Indy!...gsa612
That's basically what I came up with, and the DA was 2800'. I'm pretty sure there's another .10+ in tuning and a gear swap, I'm ok with that for a start.

Nmbr1GMfan 09-30-2019 08:46 PM
Re: H-I-J '76 Nova re-fit.
 
Quote:
Originally Posted by Bob Gullett (Post 598865)
Hey Todd. Watched the in car video and Autumn did everything right including the burnout. The burnout you can do in 2nd or 3rd. Doesn't matter. I've made enough runs on mine to know missing a shift point (which I've done lots LOL) unless you hit the limiter will maybe affect ET a few hundredths. She's doing good and will get better and more comfortable with seat time. Getting a clutch to be perfect can be tough. Once you get the racepak working it will be an amazing tool to make sure the clutch is working as it should. Have enjoyed following the build of the Nova.
Thanks Bob, we run a heavily counter weighted setup, it will drive right through the clutch hitting it from 2500 rpm. Tinzy called me today and said her and Cale are coming to see us in 2 weeks so I'll have the clutch guru's here and I'll get even more knowledge and inspiration from the folks at Black Magic!

Rich Biebel 09-30-2019 08:54 PM
Re: H-I-J '76 Nova re-fit.
 
Quote:
Originally Posted by Nmbr1GMfan (Post 598863)
This is exactly right, the clutch only seems a little light at the hit, which, as you mentioned the lower starting line rpm will have a hand in slippage running a counter weighted setup.


Here's the Waller 1/8 mile calculation, remember we only ran it just past the 1/8th.
https://i.imgur.com/N7HcoKXh.jpg
If you ran those numbers in a 1/4 mile run You’d have to be real happy. I would be.

I wired the stock horn button to work the line lock on our ‘68 Nova back in 1969.

That car had a built in rev limiter. It would just go flat at 6000 or less with what we had to work with back then...Some cams pulled up a little higher at 6200.....Hydraulic lifters, stock springs, stock rockers. 12.20’s at 114+ was best numbers back in 1970 on 7” tires ! 10-1 compression 350...


The clutch was low tech. Schiefer RevLoc diaphragm clutch, 10-1/2” GM disc 11” 30lb wheel.

Mark Yacavone 09-30-2019 09:20 PM
Re: H-I-J '76 Nova re-fit.
 
Quote:
Originally Posted by Nmbr1GMfan (Post 598695)
. Clutch needs a tightening up for sure.
Kinda wonder who I'm discussing this with now.

So, okay ,if you think 7000, make that 7500 on the burnout is necessary and good for the valve springs, etc. , is the right thing to do, and I'm wrong, then tell Autumn to keep doing it..By all means
;-)

Nmbr1GMfan 09-30-2019 09:27 PM
Re: H-I-J '76 Nova re-fit.
 
Quote:
Originally Posted by Rich Biebel (Post 598870)
If you ran those numbers in a 1/4 mile run You’d have to be real happy. I would be.

I wired the stock horn button to work the line lock on our ‘68 Nova back in 1969.

That car had a built in rev limiter. It would just go flat at 6000 or less with what we had to work with back then...Some cams pulled up a little higher at 6200.....Hydraulic lifters, stock springs, stock rockers. 12.20’s at 114+ was best numbers back in 1970 on 7” tires ! 10-1 compression 350...


The clutch was low tech. Schiefer RevLoc diaphragm clutch, 10-1/2” GM disc 11” 30lb wheel.
I'm honestly amazed after the dyno runs and where the power was, how far this thing will rev, in lower gears it will hit 7500 no problem.

Nmbr1GMfan 09-30-2019 09:35 PM
Re: H-I-J '76 Nova re-fit.
 
Quote:
Originally Posted by Mark Yacavone (Post 598872)
Kinda wonder who I'm discussing this with now.

So, okay ,if you think 7000, make that 7500 on the burnout is necessary and good for the valve springs, etc. , is the right thing to do, and I'm wrong, then tell Autumn to keep doing it..By all means
;-)
60' is off, needs some clutch at the hit. If you dump the clutch at 5k the wet tires won't turn a lick, low base all counter. The only reason it stopped at 7500 is because thats where the chip is, were here to run heads up and haul *****, if we have to turn it 8k and buy valve springs, we'll throw a couple sets in the trailer or we'll fix it when it snaps something off. How's that saying go? We're here to chew bubblegum and break valve springs and we're all out of bubblegum!

Mark Yacavone 09-30-2019 10:03 PM
Re: H-I-J '76 Nova re-fit.
 
Quote:
Originally Posted by Nmbr1GMfan (Post 598875)
60' is off, needs some clutch at the hit. If you dump the clutch at 5k the wet tires won't turn a lick, low base all counter. The only reason it stopped at 7500 is because thats where the chip is, were here to run heads up and haul *****, if we have to turn it 8k and buy valve springs, we'll throw a couple sets in the trailer or we'll fix it when it snaps something off. How's that saying go? We're here to chew bubblegum and break valve springs and we're all out of bubblegum!
Okay, I understand the low base /counterweight thing. Better use 2nd gear then.
Forgive me, guys.
Carry on..

Nmbr1GMfan 09-30-2019 10:08 PM
Re: H-I-J '76 Nova re-fit.
 
Quote:
Originally Posted by Mark Yacavone (Post 598876)
Okay, I understand the low base /counterweight thing. Better use 2nd gear then.
Forgive me, guys.
Carry on..
It's all good!


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