H-I-J '76 Nova re-fit. - Page 175

FireSale · 04-17-2020, 06:20 PM

What does your RacePak tell you? Is it set up to log A/F and RPM? That would tell you what the fuel mix is doing at your shift points. Stock limits your cam lift but you can still move the valve events around.
Good luck.

HP HUNTER · 04-17-2020, 10:33 PM

Piston to wall clearence?
Heads been evened up?
Who picked the lobes?

Respectfully I don't see how the MPH is any of the problem at this point.

1320/117=11.28

Don Kennedy · 04-18-2020, 11:30 AM

Quote:

Originally Posted by Nmbr1GMfan

Absolutely not. Just dead, no power.

It looks like me I would get another opinion on the clutch just to cover bases . Call Rob Youngblood 208 880 6214 won't hurt

Rod Greene · 04-18-2020, 12:13 PM

Todd your pm's are full. I agree with Don give Rob a call.

Greg Reimer 7376 · 04-18-2020, 03:21 PM

Something doesn't seem quite right if the car goes 6900 at 117.50. That's fast enough to indicate that the engine makes a reasonable amount of horsepower.You said that it has 5.14 gears and goes 6900. That almost seems to me that the car needs more gear. My 327 Chevelle in I/SA had 5.57's in it when I ran it at Pomona a few years ago, and it has a Glide with a typical stocker converter. It ran 7480 in the lights, and it felt like it wouldn't go any faster, it was pretty well done. That figures out to 68 RPM per MPH. I put 5.38's in it, doesn't sound like a huge change, but that is 61 RPM per MPH. The engine seems to like it better, although the first half of the track is about .03 slower. The overall result is about the same. Your engine seems to pull fourth gear OK, but a little more gear would make its job a bit easier. You have a car there that is consistent, and a consistent set of results run to run. Maybe moving the cam up might show some results. I don't think I would change too many pieces until I had some answers. The clutch would be one thing to investigate, how ever.

Glenn Briglio · 04-19-2020, 09:20 AM

What rpm does it make max hp at? What rpm is max torque at? How is the torque at drop rpm of shift and how is torque curve on up from drop off rpm?

Nmbr1GMfan · 04-19-2020, 10:53 AM

Quote:

Originally Posted by Hacksaw

Camshaft ?

I don't think so, same cam as it had before and this wasn't a problem before the engine explosions.

Nmbr1GMfan · 04-19-2020, 10:55 AM

Quote:

Originally Posted by Dyno

Running out of fuel?

No, carries fuel pressure the whole way and has ample volume.

Nmbr1GMfan · 04-19-2020, 11:10 AM

Quote:

Originally Posted by Don Kennedy

It looks like me I would get another opinion on the clutch just to cover bases . Call Rob Youngblood 208 880 6214 won't hurt

Quote:

Originally Posted by Rod Greene

Todd your pm's are full. I agree with Don give Rob a call.

It's not a clutch issue, I've had it loose and tight and it still has issues pulling early in high gear.

Nmbr1GMfan · 04-19-2020, 11:29 AM

Quote:

Originally Posted by Greg Reimer 7376

Something doesn't seem quite right if the car goes 6900 at 117.50. That's fast enough to indicate that the engine makes a reasonable amount of horsepower.You said that it has 5.14 gears and goes 6900. That almost seems to me that the car needs more gear. My 327 Chevelle in I/SA had 5.57's in it when I ran it at Pomona a few years ago, and it has a Glide with a typical stocker converter. It ran 7480 in the lights, and it felt like it wouldn't go any faster, it was pretty well done. That figures out to 68 RPM per MPH. I put 5.38's in it, doesn't sound like a huge change, but that is 61 RPM per MPH. The engine seems to like it better, although the first half of the track is about .03 slower. The overall result is about the same. Your engine seems to pull fourth gear OK, but a little more gear would make its job a bit easier. You have a car there that is consistent, and a consistent set of results run to run. Maybe moving the cam up might show some results. I don't think I would change too many pieces until I had some answers. The clutch would be one thing to investigate, how ever.

Greg, thanks for the insight. I believe for what we have it makes great power and runs well, I have always thought the car needs more gear as it runs currently. I also believe if we had the old head that was broken on the engine now this may be a non issue. The car runs fairly well so messing around with the gear now when we're going to swap heads and manifold just to change the gear again isn't in my plan. The problem isn't so bad in good weather but Autumn says it's dead in 4th when the air gets bad. We do have a couple tuning things to try when we get back to racing, but since we'll be changing the setup with new heads I'll not get too far into it. Thanks again.

04-17-2020, 06:20 PM	#1741
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 236 Times in 127 Posts	Re: H-I-J '76 Nova re-fit. What does your RacePak tell you? Is it set up to log A/F and RPM? That would tell you what the fuel mix is doing at your shift points. Stock limits your cam lift but you can still move the valve events around. Good luck. __________________ Dale Shearon 68 Mustang 6394

04-17-2020, 10:33 PM	#1742
HP HUNTER Senior Member Join Date: Feb 2012 Location: Colorado Springs Colorado/Thousand Oaks Ca Posts: 606 Likes: 68 Liked 238 Times in 97 Posts	Re: H-I-J '76 Nova re-fit. Piston to wall clearence? Heads been evened up? Who picked the lobes? Respectfully I don't see how the MPH is any of the problem at this point. 1320/117=11.28 Last edited by HP HUNTER; 04-18-2020 at 09:44 AM.

04-18-2020, 12:13 PM	#1744
Rod Greene Senior Member Join Date: Mar 2002 Location: TN Posts: 514 Likes: 355 Liked 204 Times in 72 Posts	Re: H-I-J '76 Nova re-fit. Todd your pm's are full. I agree with Don give Rob a call. __________________ Rod Greene Real men shift for them selves. Slowly working on TA Challenger for D,E/S and a 72 Challenger for SS/K, L as if I don't have enough other projects.

04-18-2020, 03:21 PM	#1745
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,111 Likes: 164 Liked 649 Times in 208 Posts	Re: H-I-J '76 Nova re-fit. Something doesn't seem quite right if the car goes 6900 at 117.50. That's fast enough to indicate that the engine makes a reasonable amount of horsepower.You said that it has 5.14 gears and goes 6900. That almost seems to me that the car needs more gear. My 327 Chevelle in I/SA had 5.57's in it when I ran it at Pomona a few years ago, and it has a Glide with a typical stocker converter. It ran 7480 in the lights, and it felt like it wouldn't go any faster, it was pretty well done. That figures out to 68 RPM per MPH. I put 5.38's in it, doesn't sound like a huge change, but that is 61 RPM per MPH. The engine seems to like it better, although the first half of the track is about .03 slower. The overall result is about the same. Your engine seems to pull fourth gear OK, but a little more gear would make its job a bit easier. You have a car there that is consistent, and a consistent set of results run to run. Maybe moving the cam up might show some results. I don't think I would change too many pieces until I had some answers. The clutch would be one thing to investigate, how ever.

04-19-2020, 09:20 AM	#1746
Glenn Briglio VIP Member Join Date: Nov 2002 Location: Massapequa Park,NY Posts: 1,206 Likes: 1,729 Liked 822 Times in 264 Posts	Re: H-I-J '76 Nova re-fit. What rpm does it make max hp at? What rpm is max torque at? How is the torque at drop rpm of shift and how is torque curve on up from drop off rpm? __________________ 1989 Camaro Iroc-Z I/SA B&B Auto Machine Shop.