Quote:
Originally Posted by Travis Miller 
Refactoring of engine horsepower by NHRA actually started as early as the 60's but it was kept a secret for whatever reason until they published a book called the "Factor Finder" in 1972 followed by an updated version in 1973. Sometime in 1973 is also when NHRA started listing the refactored horsepowers at the bottom of the column in the classguide.
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Does anyone have a copy of the 73 Class Guide which has the refactored HP in it?
Stan
PS Let me add this.
Quote:
Originally Posted by Paul Ceasrine
J-Code,
From what I have in my articles from 1972 NHRA Stock Class.
Some of the 'popular competitors'
A/S or A/SA
* 1968 - Chevrolet Camaro Z-28 ~ 302/290 HP
* 1968 - Chevrolet Camaro SS396 ~ 396/350 HP
* 1969 - Plymouth Road Runner 'Six-Barrel' ~ 440/390 HP
* 1969 - Dodge Super Bee 'Six-Pack' ~ 440/390 HP
* 1971 - Oldsmobile 4-4-2 'W-30' ~ 455/365 HP
* 1969 - Ford Mustang 'Cobra-Jet' ~ 428/335 HP
B/S or B/SA
* 1971 - Plymouth 'Duster 340' ~ 340/275 HP
* 1970 - Oldsmobile 4-4-2 ~ 455/360 HP
* 1972 - Oldsmobile 4-4-2 ~ 'W-30' ~ 455/300 HP
* 1969 - Ford Torino 'Cobra-Jet' ~ 428/335 HP
* 1972 - Plymouth Road Runner/GTX ~ 440/290 HP
C/S or C/SA
1972 - Buick GS 455 'Stage 1' ~ 455/270 HP
1971 - Dodge Charger ~ 340/275 HP
1972 - Plymouth 'Duster 340' ~ 340/240 HP
D/S or D/SA
1972 - Plymouth Road Runner ~ 400/265 HP
E/S or ESA
1972 - Oldsmobile 4-4-2 ~ 455/270 HP
H/S or H/SA
1966 - Chevrolet Biscayne 4-Door ~ 283/220 HP
1972 - Dodge Demon ~ 318/150 HP
J/S of J/SA
1966 - Chevrolet Bel Air ~ 283/195 HP
L/S
1972 - Ford Pinto ~ 122/100 HP
M/S
1966 - Chevrolet Corvair ~ 153/90 HP
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