Tire Help for Heads-up Manual Transmission Class

Rich osmond · 04-24-2023, 02:31 PM

I am building a car for the NMCA Coyote stock class (sealed factory engine ~500HP, 3000# min weight, and g101a transmission). The cars 60' in the mid-1.30 range, and run ~9.7's. Nearly all of the cars in the class run 26" x 10" M/T stiff all slicks, but I am wondering if there is any advantage (or disadvantage) to running a 28" tire with the appropriate gearing. Any experience is appreciated!

Ralph A Powell · 04-24-2023, 02:57 PM

What clutch and flywheel (steel or aluminum) and what 1st & 2nd gear ratio? A larger diameter will give you more contact area

Rich osmond · 04-24-2023, 03:19 PM

Thanks. Aluminum flywheel, single clutch disc 10” min, but we can run a tamer. First gear ~ 3:1, second gear ~2:1. Appreciate the help.

Jim Caughlin · 04-24-2023, 05:34 PM

Quote:

Originally Posted by Rich osmond

Thanks. Aluminum flywheel, single clutch disc 10” min, but we can run a tamer. First gear ~ 3:1, second gear ~2:1. Appreciate the help.

Oh boy, here we go again...

Rich osmond · 04-24-2023, 05:38 PM

OK. I’m just seeking a little help. Thx

1347 · 04-24-2023, 10:06 PM

why wouldn't you put a 30x9 bias tire the Stick stocker guys run? i know thats why you are asking what to use, but I would think a 30x9 would give a much better contact patch over a 26x10.

04-24-2023, 02:31 PM	#1
Rich osmond Junior Member Join Date: Jan 2016 Posts: 5 Likes: 4 Liked 0 Times in 0 Posts	Tire Help for Heads-up Manual Transmission Class I am building a car for the NMCA Coyote stock class (sealed factory engine ~500HP, 3000# min weight, and g101a transmission). The cars 60' in the mid-1.30 range, and run ~9.7's. Nearly all of the cars in the class run 26" x 10" M/T stiff all slicks, but I am wondering if there is any advantage (or disadvantage) to running a 28" tire with the appropriate gearing. Any experience is appreciated!

04-24-2023, 02:57 PM	#2
Ralph A Powell Member Join Date: Oct 2017 Location: Bay City Texas Posts: 388 Likes: 2 Liked 225 Times in 136 Posts	Re: Tire Help for Heads-up Manual Transmission Class What clutch and flywheel (steel or aluminum) and what 1st & 2nd gear ratio? A larger diameter will give you more contact area

04-24-2023, 03:19 PM	#3
Rich osmond Junior Member Join Date: Jan 2016 Posts: 5 Likes: 4 Liked 0 Times in 0 Posts	Re: Tire Help for Heads-up Manual Transmission Class Thanks. Aluminum flywheel, single clutch disc 10” min, but we can run a tamer. First gear ~ 3:1, second gear ~2:1. Appreciate the help.

04-24-2023, 05:38 PM	#5
Rich osmond Junior Member Join Date: Jan 2016 Posts: 5 Likes: 4 Liked 0 Times in 0 Posts	Re: Tire Help for Heads-up Manual Transmission Class OK. I’m just seeking a little help. Thx

04-24-2023, 10:06 PM	#6
1347 Senior Member Join Date: Aug 2007 Location: Monroe Twp NJ Posts: 501 Likes: 1,029 Liked 988 Times in 272 Posts	Re: Tire Help for Heads-up Manual Transmission Class why wouldn't you put a 30x9 bias tire the Stick stocker guys run? i know thats why you are asking what to use, but I would think a 30x9 would give a much better contact patch over a 26x10. __________________ Duane Hoven 1342 SS/GT