What was the true horsepower of a 70 440 4bbl ? i know 375HP is the published ponies but ??
- Thread starter WhiteGP
- Start date
Katfish
Well-Known Member
Google the Engine Masters series, I'm sure they did a test on that
pschlosser
Well-Known Member
It was +/- 5% of that figure. And to get even the 375 horsepower on a used or worn engine, presuming all OEM parts are in place, things have to be perfect, fuel quality, carburetor, fuel mixture, exhaust, etc.
Nicks Garage (Youtube) has done some tests, too. I think that's where I've seen that bit about "being perfect."
Some nice things about the 440, is it's not too hard to squeeze more HP and Torque out of it, and there is a wide base of experience and knowledge still out there to be harvested using google search.
In 1970, the only difference between the 440-4 HP and the 440-6 was the carburetors, which netted another 15 HP.
Nicks Garage (Youtube) has done some tests, too. I think that's where I've seen that bit about "being perfect."
Some nice things about the 440, is it's not too hard to squeeze more HP and Torque out of it, and there is a wide base of experience and knowledge still out there to be harvested using google search.
In 1970, the only difference between the 440-4 HP and the 440-6 was the carburetors, which netted another 15 HP.
Last edited:
Xcudame
Well-Known Member
Actually about 350 horsepower. 69 was closer to 375. But the 480 ft-lbs of torque is pretty close! But with a camshaft kit, adjustable rocker arms and corresponding valve springs and headers, 500 horsepower is so easy (think Mopar Performance .524 solid lift cam)! Remember the compression lowered from 10.1:1 in 69 to 9.7:1 in 70. But the true compression ratio was at least half a point less when you calculate it out.
Now the 383 HP made about the same horsepower as the 440 but had 70 or so less ft-lbs of torque. And the 340 4bbl was actually over 300 horsepower. This explains why a good driver in a 340 car could hold his own against a big block and a 383 could beet a 440 all day in the 1/8 mile. But the extra torque comes into play for the 440 eventually.
But again, that 440 upgrade I mentioned earlier. Zowie!
Now the 383 HP made about the same horsepower as the 440 but had 70 or so less ft-lbs of torque. And the 340 4bbl was actually over 300 horsepower. This explains why a good driver in a 340 car could hold his own against a big block and a 383 could beet a 440 all day in the 1/8 mile. But the extra torque comes into play for the 440 eventually.
But again, that 440 upgrade I mentioned earlier. Zowie!
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