Wheelbase/HP Relationship??

[RJ Sledge]

Is this something that every combo has, or is it just certain ones? The reason I ask is that there are several engine combo's that are identical and depending on the wheelbase of the vehicle they have different HP ratings?

Whats up with that? For instant, Mopar 383/330 is rated at 280 in a big car and 287 in a small car(soon to be 294). Same motor, just different HP ratings. The only difference is the wheelbase 116/108.

The motors are identical.

This does not seem right. If it is right how come this is not done with the Fords and Chevrolets?



Later RJ

[Jeff Lee]

The 383 / 280 engine is the non-magnum engine; smaller cam than the 383 Magnum engine. Might even be a slight decrease in compression, check the specs. As used in the '67 A-Body cars, it also suffered from a very restrictive cast iron exhaust manifold.
The WB has nothing to do with anything. But sometimes it is a reflection on what is being run in competition and subsequently it may be hit by the AHFS.

[RJ Sledge]

Jeff

We are not talking about Pure Stock with factory exhaust manifolds here, we are talking about identical engine specs for these motors, regardless of what the Factory Rating was. We have the same motor being factored by Wheelbase and nothing else. Do you think that this is right?

R J

[SSDiv6]

R J, could you be more specific in the particular car bodies?
Are we talking about A-Body vs. B-Body or A-Body vs. E-Body?

[RJ Sledge]

From what I read on the Classification and Blue Print Specs is that the 280 hp motor and the 325/330 HP motors are all identical as far as carb, cam, intake, rocker ratio, cam lift, deck, gasket, etc., etc.. So why are they separating the HP ratings on these motors according to "A" Body, "E" body, "B" Body "D" Body or Any Body and No Body???? I realize that the transmission does make a difference in the AHFS and it should be that way. What I am confused about is why the difference in the Wheelbases and "Body" differences?

I am really confused here and would appreciate it if somebody could explain why a Wheelbase is even considered a reason for different HP Rating.

Thanks RJ

[SSDiv6]

Originally Posted by r sledge

From what I read on the Classification and Blue Print Specs is that the 280 hp motor and the 325/330 HP motors are all identical as far as carb, cam, intake, rocker ratio, cam lift, deck, gasket, etc., etc.. So why are they separating the HP ratings on these motors according to "A" Body, "E" body, "B" Body "D" Body or Any Body and No Body???? I realize that the transmission does make a difference in the AHFS and it should be that way. What I am confused about is why the difference in the Wheelbases and "Body" differences?

I am really confused here and would appreciate it if somebody could explain why a Wheelbase is even considered a reason for different HP Rating.

Thanks RJ

R J, there is an actual difference in performance when the same engine is used in the various body styles. The combination will perform differently when put in an E-Body to a B-Body and from a A-Body to an E-Body. Ask Larry Hill how his engine combo would perform from a B-Body (Charger) to an E-Body (Cuda).