4-30-20 day for the 430 CanAm aluminum big block Chevy

[Vortecpro]

Originally Posted by JoeC

the NHRA Pro Stock records are

1970 144.48 mph

1971 146.10 mph

1972 149.50 mph

I put 700 hp and 3010 lbs in the calculator and came back with ...
Your ET / MPH computed from your vehicle weight of 3010 pounds and HP of 700 is 9.47 seconds and MPH of 142.68 MPH.

The question is are you using the right calculator? You can't go wrong with the Moroso power speed calculator, lines right up with my dyno/track testing.
Take a look at this MPH calculator its close. http://www.wallaceracing.com/et-hp-mph.php


I get 707 HP for 145 MPH @ 3010, big power back in 1970!

[EZ Nova]

Joe and Mark, one main issue is that the MMPS and "Match races" were not at 3000+ lbs? They took the weights out, used bigger engines and ran them! This why the 1970 times were 9.90 or there abouts and the Match racers were around 9.40's.

Don't forget that most of the cars in 72 were small blocks and lighter, not the 3000+ lbs like the 70/71 years.

So to use the 144+ MPH is NOT the 427430 inch motors? These were the match race 490/500+ inchers that ran light.

Just putting the MPH/Weight ratio into prospective.

[JoeC]

Originally Posted by 70 copo

Since it is a Big Block perhaps a better RPM/REV comparison would be to the L-88 right?

From reading about the 430 Chevy , there were a few comments that it " would rev like a small block" or "rev like a 302".

I think they were taking about the short stroke or de-stroked dimensions , large bore to short stroke dimensions.

To get the SCCA legal 302 cubic inches, Chevrolet used 327 block and 283 crank so a 4.00" bore and a 3.00" stroke which was considered a short stoke for the 4 in bore size

similar to the 430 Chevy, that had a large 4.440 in. bore and 3.47 in. stroke vs the 427 L88 Bore and Stroke 4.251 in. x 3.760 in