CLASS RACER FORUM - View Single Post

Travis Miller · 02-28-2020, 09:06 PM

To figure a car for SS/GT you first need the shipping weight of the car. Ex...1968 Mustang hardtop (coupe) with heaviest engine as found in the NHRA Classguide weighs 3253 lbs.

Next you need to find which engine you want to run in the 1968 Mustang hardtop. Ex...1964 Ford 352/250 engine. Again you go to the NHRA Classguide this time using the 1964 Ford page. At the top of the page you see the GT ratings for 1964 Ford engines. The 1964 Ford 352/250 engine is de-rated down to 244.

Lay out the data as follows.....

3253 – 250 = 3003 divided by 244 = 12.30

3253 + 250 = 3503 divided by 244 = 14.35

12.30 is GT/M or GT/MA. 14.35 is GT/Q or GT/QA. The car can run M, N, O, P, and Q classes in SS/GT. Weight is found by multiplying the class weight break (as found in the NHRA rulebook) times the GT horsepower and then adding 170 lbs for the driver.

Ex...GT/NA would be 12.50 times 244 = 3050 plus 170 driver = 3220 lbs. (Note: the top class GT/MA cannot go to the class break of 12.00 because the shipping weight of 3253 has already had the max of 250 subtracted. GT/M would be 3003 + 170 = 3173.)

All outer classes can use the class break when figuring the minimum scale weight.

02-28-2020, 09:06 PM	#12
Travis Miller Member Join Date: Jun 2007 Posts: 478 Likes: 1 Liked 276 Times in 27 Posts	Re: Super Stock classification To figure a car for SS/GT you first need the shipping weight of the car. Ex...1968 Mustang hardtop (coupe) with heaviest engine as found in the NHRA Classguide weighs 3253 lbs. Next you need to find which engine you want to run in the 1968 Mustang hardtop. Ex...1964 Ford 352/250 engine. Again you go to the NHRA Classguide this time using the 1964 Ford page. At the top of the page you see the GT ratings for 1964 Ford engines. The 1964 Ford 352/250 engine is de-rated down to 244. Lay out the data as follows..... 3253 – 250 = 3003 divided by 244 = 12.30 3253 + 250 = 3503 divided by 244 = 14.35 12.30 is GT/M or GT/MA. 14.35 is GT/Q or GT/QA. The car can run M, N, O, P, and Q classes in SS/GT. Weight is found by multiplying the class weight break (as found in the NHRA rulebook) times the GT horsepower and then adding 170 lbs for the driver. Ex...GT/NA would be 12.50 times 244 = 3050 plus 170 driver = 3220 lbs. (Note: the top class GT/MA cannot go to the class break of 12.00 because the shipping weight of 3253 has already had the max of 250 subtracted. GT/M would be 3003 + 170 = 3173.) All outer classes can use the class break when figuring the minimum scale weight.