454 365

[Jim Hanig]

Anyone out their want venture a guess on how much power one would make? Stock nhra engine.

[HP HUNTER]

Originally Posted by Jim Hanig

Anyone out their want venture a guess on how much power one would make? Stock nhra engine.

Example: 71 454 365 HP Impala, 4003 pounds, F/SA 11.85 index, 1320 divided by 121 mph =
10.90, 121 MPH @ 4003 pounds=553 crankshaft HP, so your looking @ 560-580 corrected STP crankshaft HP should be close. Another example: 402 350 HP, we know these make around 510 corrected STP HP with conservative heads, 510 divided by 412 = 1.23, 1.23 X 470 = 581 HP, not so sure this is a great example, but something else to consider. Another example: 260 CFM @ 28 inches X 2.2 = 572 realistic HP potential.

[Jim Hanig]

Originally Posted by HP HUNTER

Example: 71 454 365 HP Impala, 4003 pounds, F/SA 11.85 index, 1320 divided by 121 mph =
10.90, 121 MPH @ 4003 pounds=553 crankshaft HP, so your looking @ 560-580 corrected STP crankshaft HP should be close. Another example: 402 350 HP, we know these make around 510 corrected STP HP with conservative heads, 510 divided by 412 = 1.23, 1.23 X 470 = 581 HP, not so sure this is a great example, but something else to consider. Another example: 260 CFM @ 28 inches X 2.2 = 572 realistic HP potential.

l think your a bit high the 375 396 engines ,very good ones make 600 range.This engine has has stock heads,not the enhanced ones flow in the 245 range.But thanks for your input.

[jimmyparker]

Jim, I had a 454 -365 by Parsons and Meyers about 12 years ago that made 480 on their dyno. The person I bought it from said when he bought the engine that for an additional $3500 the power would have been in the 515 range.

[Bob Pagano]

If you still have to use the stock intake, thats a big bump to get to work.

[Coleydog]

A certain hp to move a certain weight at 121 mph, pretty easy to figure out, law of physics 101. IMO
Mike

[Greg Hill]

Originally Posted by jimmyparker

Jim, I had a 454 -365 by Parsons and Meyers about 12 years ago that made 480 on their dyno. The person I bought it from said when he bought the engine that for an additional $3500 the power would have been in the 535 range.

480 on their Dino is probably 530 on someone else's.

[Jim Hanig]

Originally Posted by Greg Hill

480 on their Dino is probably 530 on someone else's.

Ya Greg I had one of their 396 on Trumbles dyno it made 475 ran that way to ,but think 535 would be a good one.

[HP HUNTER]

Originally Posted by Jim Hanig

l think your a bit high the 375 396 engines ,very good ones make 600 range.This engine has has stock heads,not the enhanced ones flow in the 245 range.But thanks for your input.

"very good ones make 600 range "


I would open this question up to the whole forum, if you have a A/SA 1969 Nova with a 375 HP 396 stick and it runs 135 MPH @ 3470 in a 29.00 baro, How much HP does this take?


With 245 CFM @ 28 inches it would have to make in the 530s for HP corrected STP. My Buick flowed 213 CFM @ peak lift and made 474 HP, theres no way that BBC intake manifold is worse than the Buicks.

[Jim Hanig]

[QUOTE=HP HUNTER;531772]"very good ones make 600 range "


I would open this question up to the whole forum, if you have a A/SA 1969 Nova with a 375 HP 396 stick and it runs 135 MPH @ 3470 in a 29.00 baro, How much HP does this take?


With 245 CFM @ 28 inches it would have to make in the 530s for HP corrected STP. My Buick flowed 213 CFM @ peak lift and made 474 HP, theres no way that BBC intake manifold is worse than the Buicks.[/QUOTE What buick are you talking about? The 455 is way better than the 365/454 intake.