stock classification
 

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

Re: stock classification
 

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

Re: stock classification
 

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

Re: stock classification
 

No Sir!

Re: stock classification
 

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

Re: stock classification
 

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;)

Re: stock classification
 

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.

Re: stock classification
 

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

Re: stock classification
 

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.

Re: stock classification
 

What it seems is confusing you is the additional 170 lbs. added in for the driver. Here is how that works:

For classification purposes only, the shipping weight of the car as supplied by the manufacturer (in this case 2770 lbs) is divided by the power factor (120) to get the power to weight factor (23.04). The power to weight factor and, in this case the engine type (4 cyl), determines the classification. Since there is no 23 lb/hp class, you can adjust weight to make either V (22 lb/hp) or W (24 lb/hp) .

For actual race weight, the tech guys will calculate the class factor for V (22) or W (24) times the power factor (120) to get the minimum weight for the class. 22 x 120 = 2640 for V, or 24 x 120 = 2880 for W. Then they will add 170 for the driver and the total is the amount the car must weigh when it goes across the scales with the driver in it . For a V car, 2640 + 170 = 2810 lbs; for a W car, 2880 + 170 = 3050 lbs. It does not matter that the driver actually weighs 170 lbs, just that the scale weight is correct with the driver in the car.

I am assuming you are looking at a 1982 Camaro with the 151 4-cylinder factory rated at 90 hp and NHRA factored at 120.

Re: stock classification
 

Dwight-- Yes how viable is that combo??? FED387

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It wouldn't be one of my choices. It has small valves (1.72 & 1.5), pushrods and blueprinted compression is only around 8.5 to 1. Out of all the 151 combinations, it seems to have the best specs. Is it a multi-port injection? I'm not all that familiar with those engines, but a power to displacement ratio of close to .8 (120/151) requires that it be a stellar performer. That alone would make it hard to perform against other possibilities in those classes.

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OK using the same 82 Camaro what other competitive classes are there maybe a v-6???

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so, i'm MY case the car itself can be 50#s light?
l weigh in at 230, uh, ish.....

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The V-6 combo holds the current V/SA record. Still I'd rather have a 231 buick 2 bbl @130 hp or a 2300 Ford Turbo.
The 151 in the Camaro is TBI......... Hp is too high . Wouldn't you rather have a 196 (3.0) Buick V 6 at 115 hp in a Monza?

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I sure would!

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Are you sure you can fit in that Rambler??

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Dwight/Alan----I understand now and then you go to the technical area to find out what head/intake/carb etc is allowed correct??? Thanx fed387

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That is in the Engine Blueprint Guide. Cam lift and valve sizes are there as well. There is also a piston guide and a connecting rod guide.

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Dwight/Alan--- OK I understand the whole thing now--Now I have a clean 1982 Camaro Factory 4 cylinder /auto trans car----PLAIN JANE kinda car no air/windows etc... Decent shape in/out gotta be light I'm sure--I understand you can change these around to different years by changing front fascia/grill and taillights---with a V-6 OR 305 4bbl carb motor what class do I want to run with what factored engine and what year---not looking to set the record but dont want to look like a complete a--hole out there either---want to run a bit under the index first time out-then will work on the combo to be quicker-thanx fed387

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The V6 and 305 cars are not my forte, I do not know what to tell you on that. I'd lean towards the 305 strictly because I'm more familiar with it, and do not like the 60 degree V6 stuff, not at all. If I were doing this, I'd be looking at the qualifying sheets, the records, and maybe Nitro Joe's stats.

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Aren't those V-6's the regular 90* stuff or were the early ones 60* engines??? fed387

Re: stock classification
 

I looked at 82 through 85, the V6 is the low performance 173 60 degree V6. About as desirable as a social disease, at least to me. At least a shot will likely cure the social disease.

I take it you want to build a carbureted automatic combination.

Re: stock classification
 

would prefer to--fed387

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As I said I personally would avoid the 60 degree V6 like the plague. I would have to seriously consider a 4 speed with the 305 though, but an automatic might do okay.

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Alan is right stay away from that 6, its not the same stuff they run in SS and comp.

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oh thanks................

hey, how ya been?
i'm still collecting parts...