H-I-J '76 Nova re-fit.

[Nmbr1GMfan]

Originally Posted by Rich Biebel

I did not think the run sounded like the clutch was slipping badly at all....
RPM did not flair.....engine was weak and rpm did not climb....

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.

[Rich Biebel]

Originally Posted by Nmbr1GMfan

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.

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.

[Nmbr1GMfan]

Originally Posted by Rich Biebel

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.

[Rich Biebel]

Originally Posted by Nmbr1GMfan

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.

A stock Z/28 302 would rev to 8000 if you let it back in 1969-1970

I drove one and that’s with stamped rockers and springs that had about 100lbs on the seat IIRC..

The difference from a hydraulic cam engine to a solid cam was like night and day.

[Rich Biebel]

My friend Joe Demarzo making a real nice pass this past Sunday at MG



https://www.facebook.com/larry.guest...4756815921752/

[Nmbr1GMfan]

Originally Posted by Rich Biebel

The difference from a hydraulic cam engine to a solid cam was like night and day.

Absolutely

[Casey Miles]

Originally Posted by Rich Biebel

A stock Z/28 302 would rev to 8000 if you let it back in 1969-1970

I drove one and that’s with stamped rockers and springs that had about 100lbs on the seat IIRC..

The difference from a hydraulic cam engine to a solid cam was like night and day.

Please tell that to NHRA, the solid lifter engines were penalized with HP from the factory and now that all the hydraulic engines can use solid lifters they didn't get HP. But the solid lifter engines didn't get a reprieve of HP.
Casey Miles
Stock

[Mark Yacavone]

Originally Posted by Casey Miles

Please tell that to NHRA, the solid lifter engines were penalized with HP from the factory and now that all the hydraulic engines can use solid lifters they didn't get HP. But the solid lifter engines didn't get a reprieve of HP.
Casey Miles
Stock

1970 LT1 , 360 hp, now 320 with manual trans. ;-)

[Nmbr1GMfan]

Really really hot here at VMP, made a clutch adjustment and two test runs today. About .05-.07 slower than our test last week but Good weather is on the way. Too hot so I'm going in the a/c for a bit then doing carb work tonight. Shot an in car video and you can clearly hear the car labor in high gear till maybe 6100 then takes right off till about 6900 at the finish. Making some shift light adjustments for tomorrow.

[Casey Miles]

Originally Posted by Mark Yacavone

1970 LT1 , 360 hp, now 320 with manual trans. ;-)

1967-69 Z/28 302, 290 HP from factory, 309 NHRA Factor. That same 350 that you mentioned, only has to weigh only 110 lbs. more than the 302 in E/S. The 302 is factored to 1.023 HP per ci, the 350 since it's basically the same engine just more cubic inches should have the HP factor of 358 HP fallowing the same formula. NHRA gave that engine combo a gift.
Casey Miles
Stock