stock classification

[Chuck Norton]

Originally Posted by FED 387

If the engine factor is 23.08 and the shipping weight is 2770 what/ or how do you figure what class the car falls into??? comp 387

If it's a V8 = U/S or U/SA

If it's a four or six cylinder = V/S or V/SA

if it's a four cylinder w/added weight = W/S or W/SA

If it's FWD = D/F

[FED 387]

Thank you but do you ever divide pounds per cube or cubes into weight when doing this??? Thanx FED 387

[Woodro Josey]

No Sir!

[FED 387]

So 23.08 is how you determine which class you are in AND 2770 is the minumum the car can weigh for that class correct???... At what point does the 170 pound driver figure come into play as part of the 2770 or is it added to the 2770 or is the car weight 2770 LESS 170 to determine the minimum car weight???? Thanx FED387

[George Mirza]

The basic formula is Factor x NHRA HP + #170 (driver)= Min. Weight.

The issue here is determining the correct factor for this combo. Like Chuck stated above, if it's a V-8 the heaviest V-8 class is U and the factor is 20.00 or more.

If it's a 4 or 6 cyl. it falls into V and the factor is 22.00 or more. (23.08 listed factor) So you use 22.00 as your factor for V.

Now all you need is the NHRA HP to figure your weight.

[FED 387]

NHRA site lists a 151 cu in 4 cyl engine at 90 hp and a "factor" of 23.08 and a shipping weight of 2770 so it is a V class but what is the least it can weigh??? And do you thnen add the driver or will that weight include a 170 pound driver??? FED387

[Mark Yacavone]

Dick , If you want to run V ,which is it's natural class, it's 22 x 90=1980 + 170 = 2150 . I doubt it's that light , but you want to run W anyway, which is a 4 cyl class (24 lbs) (two more lbs per hp) so add 90 twice and you got it.
It's not FWD ,is it? PM me if you want.

[Tom keedle]

Originally Posted by FED 387

Thank you but do you ever divide pounds per cube or cubes into weight when doing this??? Thanx FED 387

well, it's not the cubes that they divide into, it's horsepower (real or factored) but i'm waiting to be eddykated on how the drive weight stuff works.
i havent seem 170 lbs in 30+ years