Re: Wheelbase/HP Relationship??
 

RJ
I took a little time and looked at Ford 1968 and it happens to everyone. The 428/335 hp E version is rated at 370 in the Fairlane and 375 in the Mustang. I think the engines are the same and it appears the Fairlane was dropped 5 hp in 05, likely thru a request. Again, I think it has to do with "families" in the AHFS. Mopar A body is a different family so when an A-body gets hit the B and E body doesn't.
Again, I could be wrong.

Re: Wheelbase/HP Relationship??
 

Stewart, you are correct. Also, the reason why you have not seen many competitive 383's and 440's in the past was due to the fact that many did not want to build these engines due to the CFM limitations of the carburetor. With the HP defactoring and the cam rule change, theses combinations with 383/440 engines with the Carter AVS carburetor, have become competitive. Also, let's not take away, and let's recognize the hard work and many hours of R&D by racers like Steve Wann and others that have made these engine combinations competitive in Stock and Super Stock class.

Re: Wheelbase/HP Relationship??
 

On both the 383 & 440 4-bbl, the hp on these cars have been lowered the past few years. The 383 used to be 315 or 320 hp when we ran it in the late 80's, now I think it's 280 or 290. The 440 4-bbl used to be the factory rating of 375, now it's 350. Both of these engines are now inline to be competitive. Neither are killer, but are 1.00 second under engines when done correctly.

SSDiv6 is correct about the 4-bbl engines. The carbs are not that bad, but the factory intake is horrible. To get into the cylinder head, the air/fuel charge goes UPHILL, it's that bad.

On the cam rule, this rule change did not help the 383 or 440. Both have had plenty of spec duration for a long time.

Re: Wheelbase/HP Relationship??
 

A good example for this is the 305 Chevy's of various years. Camaro's are more aero than , say a Malibu S/W. thus have more HP.

Re: Wheelbase/HP Relationship??
 

Chris! Not only have they (NHRA) lowered the HP on the B/RB engines but they now allow the 915 head to be used in place of the 916 if they put a 1.60 exhaust valve in the 915 which had a 1.74 ex valve. Yes the AVS can be made to work very well!..........Later, John