I meant to add more of the text from the article, so here it is...
Buick 455 Stage 1
"This one had the highest torque of at at 510 lbs/ft. and the torque curve was pretty flat from 2500 to 3500 rpm. We have assigned it a true peak rating of 420 hp at 5400 rpm, well up from the factory rating of 360 hp."
Camaro Z/28 and Boss 302 Mustang
"Both of these engines were rated at 290 hp at 5800 rpm, with 290 lbs/ft torque. These ratings were obviously fudged to get the cars into the lower stock classes at the drag strip. It didn't work. NHRA officials immediately factored their horsepower up to 310, and put them in a higher class. And that was their true power peak- 310 hp at 6200 rpm."
Mopar 340-4 bbl
"This was another small block engine that was conservatively rated to get it into a more favorable drag strip class. And it did work for a while. But actually this was one of the sweetest small block street engines of the period, and that factory rating of 275 hp at 5000 rpm should really be 320 hp at 5600 rpm. The mill would put out more than 275 hp net."
Ford Cleveland 351-4 bbl
"This one was marketed as a 'peppy, responsive' passenger car engine for the mass market. But actually it was a thinly desguised high-performance V-8 for the youth market. The advertised rating of 300 hp was very conservative. With 11-to1 compression, huge ports and valves, long camming and 650 cfm carburetion, the 351-4 bbl Cleveland would dyno 340 hp at 5600 rpm very easily. Note also that the optional Boss 351 version, with better camming and manifolding was good for another 20 hp at 6000 rpm. Healthy engines for 351 cubes."
Boss 429 Mustang
"On paper this engine should have been close to the Chrysler Street Hemi in dyno performance. It actually had bigger ports and valves. But, alas, those huge ports and valves were the Boss 429s downfall on the street. Mid-range response and torque were soft. And with the limited carburetion and camming necessary for street driving, the act never really got it together even above 5000 rpm. The Boss 429 was a lost soul, with no rpm range where it was really comfortable. The true dyno peak of 420 hp at 5600 rpm was very little better than the 428 Cobra Jet."
I'll post the last three from the text in a little while.
Originally Posted by Bob
