Weight of A/FX vs B/FX Pontiac Super Duty 421s

[FireSale]

I have a rule book from that era but it's on a broken computer. I found this article on the Swiss Cheese if it helps at all:

http://www.supercars.net/cars/4922.html

http://blog.hemmings.com/index.php/2...ll-for-800000/

Dale

[DeuceCoupe]

Originally Posted by FireSale

I have a rule book from that era but it's on a broken computer. I found this article on the Swiss Cheese if it helps at all:

http://www.supercars.net/cars/4922.html

http://blog.hemmings.com/index.php/2...ll-for-800000/

Dale

Dale,
Thanks, I had seen 1 of those links but not the other.


Recently some of us were resolving another issue, about Grumpy's Toy, and after much searching found that Chevy454 over on HAMB went to a huge amount of work and scanned all the NHRA Rule Books into PDF. VERY handy!
1958-1968 NHRA Rule Books scanned into handy PDFs

http://www.jalopyjournal.com/forum/threads/nhra-rule-books-1958-present.870742/

The links you gave bring up yet MORE confusion!
They both say the big Packer Pontiac set the C/S record in 1963 at 12.27 and 114.6.


Well, to run C/S, as I read the Rule Book, at 10.60 lb/hp minimum, a 405hp car would have to weigh at least 4300lb (or 4350 at the 410hp rating).


So the car weighed 3300 yet ran in B/FX (well maybe) and now we read it ran in C/S meaning it had to weigh 4300 or more??


I also don't see how NHRA would even let the car into C/S as there were only 14 swiss cheese cars made, and less than 100 SuperDuty cars made near as I can count for 1963.
EDIT: I have seen where these cars ran in A/S, in AHRA not NHRA. AHRA did not require 100 units production like NHRA.
Maybe that 12.27 at 114.6 is the A/S record in AHRA, not the C/S record in NHRA.
If the Cat was "de-lightened" say in the rear half only, brought up to 3580 lb, it could run in A/S with a weight break of 8.70 lb/hp (assuming AHRA weight breaks are same!)
If it were de-lightened even more, up to 3790lb, it could run in B/FX at a weight break of 9.00 lb/CID.
De-lightening would make the Swiss Cheese Cats tail-heavy, great traction like a wagon.

Beautiful big cars, would be nice to make sense of their NHRA history.