Minimum weight in NHRA SS/GT

wesley montgomery · 08-04-2014, 04:31 PM

This is a dream build as I am relegated to spectator for a long while. I know the rulebook makes mention of 2,650 as the minimum weight is that for FWD conversions only or is that for factory RWD cars? I would like to get a try and get a low HP 302 combo and put it in a flyweight car. I was thinking a 82 mustang 302 in a 61 Falcon. Is that legal given a shipping weight of 2,250 and a GT factored 302 at 157 gives you a race weight of 2,200 plus the 170 for the driver. Would this be a legal combination, I understand that getting a 61 Falcon to 2,200lbs would be impossible but I am just curious how flyweight a GT car can be. Thank

ss3011 · 08-04-2014, 06:01 PM

RWD cars must have originally been equipped with V-6 or V-8 engines.

FireSale · 08-04-2014, 10:09 PM

Quotes from the rule book. Correct me if I'm wrong.

“Shipping weight will be determined by using the power to weight factor of the vehicle with the heaviest gasoline engine and appropriate transmission, and multiplying the factor times the horsepower or performance rating.”

Heaviest 61 Falcon

factor - 25.7 HP - 101
25.7 X 101 = 2595.7 lbs. for shipping weight.

“The proper class weight will then be determined by dividing this figure by the horsepower or performance rating of the engine used”

82 Mustang 302/132 HP

2596/132 = 19.7 as a classification factor.

Your car would be GT/M (14 or more) and not viable.

Dale

wesley montgomery · 08-04-2014, 11:07 PM

Thank you for the info, I appreciate the knowledge

08-04-2014, 04:31 PM	#1
wesley montgomery Junior Member Join Date: Apr 2005 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Minimum weight in NHRA SS/GT This is a dream build as I am relegated to spectator for a long while. I know the rulebook makes mention of 2,650 as the minimum weight is that for FWD conversions only or is that for factory RWD cars? I would like to get a try and get a low HP 302 combo and put it in a flyweight car. I was thinking a 82 mustang 302 in a 61 Falcon. Is that legal given a shipping weight of 2,250 and a GT factored 302 at 157 gives you a race weight of 2,200 plus the 170 for the driver. Would this be a legal combination, I understand that getting a 61 Falcon to 2,200lbs would be impossible but I am just curious how flyweight a GT car can be. Thank

08-04-2014, 06:01 PM	#2
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 885 Likes: 63 Liked 221 Times in 102 Posts	Re: Minimum weight in NHRA SS/GT RWD cars must have originally been equipped with V-6 or V-8 engines.

08-04-2014, 10:09 PM	#3
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 236 Times in 127 Posts	Re: Minimum weight in NHRA SS/GT Quotes from the rule book. Correct me if I'm wrong. “Shipping weight will be determined by using the power to weight factor of the vehicle with the heaviest gasoline engine and appropriate transmission, and multiplying the factor times the horsepower or performance rating.” Heaviest 61 Falcon factor - 25.7 HP - 101 25.7 X 101 = 2595.7 lbs. for shipping weight. “The proper class weight will then be determined by dividing this figure by the horsepower or performance rating of the engine used” 82 Mustang 302/132 HP 2596/132 = 19.7 as a classification factor. Your car would be GT/M (14 or more) and not viable. Dale __________________ Dale Shearon 68 Mustang 6394

08-04-2014, 11:07 PM	#4
wesley montgomery Junior Member Join Date: Apr 2005 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: Minimum weight in NHRA SS/GT Thank you for the info, I appreciate the knowledge