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

Hacksaw · 11-05-2018, 09:50 AM

Quote:

Originally Posted by Glenn Briglio

Have you seen any math for the auto combo?

Several years ago ATI had a formula for the auto combo. Can't seem to find it anywhere.

Glenn Briglio · 11-05-2018, 01:11 PM

Quote:

Originally Posted by Hacksaw

Several years ago ATI had a formula for the auto combo. Can't seem to find it anywhere.

I remember seeing it.......it was based on engine stroke alone ....I think lol

FED 387 · 11-05-2018, 01:50 PM

there are various charts that have been around for quite a few years--- basically they all use rear gear ratio multiplied by first gear ratio---a guy named Dick Miller had a book out way back called""" hook & launch"""" or something like that where he used stroke and weight to calculate his numbers---others (Walcott) ATI etc. have charts that use tire diameters and other variables like HP to do their calculations---I believe that most of these are for AUTO trans cars not MANUAL trans cars---but even then those numbers might get you somewhat close as opposed to way out in left field trying to get a reasonably close ratio---bottom line is a 3000 lb car with a 5:00 gear and a 3:00 first gear making 400 HP and a 28-30 inch tire needs XXX ratio to be close ---you just have to figure that number out --- probably going to be somewhere about 10.00 -12.5 SLR probably----FED 387

Nmbr1GMfan · 11-18-2018, 10:51 AM

Sorta been laying a bit low getting some little stuff done, still messing with brakes and stuff. Weather permitting we'll be at the track next weekend. Tires came in, I'll throw the rears on to test.

6130 · 11-18-2018, 03:57 PM

Quote:

Originally Posted by Nmbr1GMfan

Sorta been laying a bit low getting some little stuff done, still messing with brakes and stuff. Weather permitting we'll be at the track next weekend. Tires came in, I'll throw the rears on to test.

Great news.

Hope you take lots of pics.

David Lee · 11-18-2018, 04:09 PM

Quote:

Originally Posted by Nmbr1GMfan

Sorta been laying a bit low getting some little stuff done, still messing with brakes and stuff. Weather permitting we'll be at the track next weekend. Tires came in, I'll throw the rears on to test.

What size slicks did you settle on?

Nmbr1GMfan · 11-18-2018, 06:33 PM

Quote:

Originally Posted by David Lee

What size slicks did you settle on?

29.5/9 stiff

Nmbr1GMfan · 11-23-2018, 11:36 PM

Been workin' workin' workin'. seats been out, steering column out, pedal assembly out and all back in. New rear tires are on for now and had it aligned, wheelie bar is on. We'll go to the track Sunday and make some runs.

11-05-2018, 01:50 PM	#3
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,428 Likes: 561 Liked 335 Times in 182 Posts	Re: H-I-J '76 Nova re-fit. there are various charts that have been around for quite a few years--- basically they all use rear gear ratio multiplied by first gear ratio---a guy named Dick Miller had a book out way back called""" hook & launch"""" or something like that where he used stroke and weight to calculate his numbers---others (Walcott) ATI etc. have charts that use tire diameters and other variables like HP to do their calculations---I believe that most of these are for AUTO trans cars not MANUAL trans cars---but even then those numbers might get you somewhat close as opposed to way out in left field trying to get a reasonably close ratio---bottom line is a 3000 lb car with a 5:00 gear and a 3:00 first gear making 400 HP and a 28-30 inch tire needs XXX ratio to be close ---you just have to figure that number out --- probably going to be somewhere about 10.00 -12.5 SLR probably----FED 387

11-18-2018, 10:51 AM	#4
Nmbr1GMfan VIP Member Join Date: Aug 2013 Posts: 1,763 Likes: 1,197 Liked 1,955 Times in 492 Posts	Re: H-I-J '76 Nova re-fit. Sorta been laying a bit low getting some little stuff done, still messing with brakes and stuff. Weather permitting we'll be at the track next weekend. Tires came in, I'll throw the rears on to test. __________________ Todd Greene

11-23-2018, 11:36 PM	#8
Nmbr1GMfan VIP Member Join Date: Aug 2013 Posts: 1,763 Likes: 1,197 Liked 1,955 Times in 492 Posts	Re: H-I-J '76 Nova re-fit. Been workin' workin' workin'. seats been out, steering column out, pedal assembly out and all back in. New rear tires are on for now and had it aligned, wheelie bar is on. We'll go to the track Sunday and make some runs. __________________ Todd Greene