Power Estimate?

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Power Estimate?

Post  hot460 on February 14th 2013, 8:51 pm

I have a 460 that was "built" by a local machine shop and was hoping someone could give me an estimate of what kind of horsepower and torque it would make. Here is as much as I know. The engine was in a '71 Lincoln Mark III, bored .030 over and it has D0VE C heads and forged pistons (balanced rotating assembly). Using Comp cams Magnum roller rockers. Valves are stainless and seats were reworked and enlarged some, but not sure of the sizes or spring specs. Exhaust ports were opened on the heads. Running an Edelbrock Performer intake (port matched) with a Holley 770 cmf Street Avenger carb and Holley 80 GPM fuel pump. Headers are Ford Powertrain Applications (shorties). Using a Pertronix Flame Thrower coil and Mallory Unilite distributor. Cam is an Ultradyne (now owned by Bullet) model 316000 grind no. FF 276/286-10H with these specs:

Duration at .050 221/230
Duration at .006 276/296
Lobe Lift .3100/.3027

I would appreciate anyone who knows enough about 460's giving me an estimate of the HP and torque it should make with this set-up. Thanks.

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Re: Power Estimate?

Post  whitefield on February 14th 2013, 11:06 pm

No idea ! What do you plan on doing with it ? Seems like a pretty good street set up! Cool
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Re: Power Estimate?

Post  Tennessee Bullitt on February 14th 2013, 11:31 pm

375-400HP on the high end. Heads ported? Flatop pistons?
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Re: Power Estimate?

Post  dfree383 on February 15th 2013, 2:16 am

Above post is on the mark IMO
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Re: Power Estimate?

Post  zbob on February 15th 2013, 9:11 am

all is not lost. my engine is about the same. slightly better head but smaller cam. it is good for a 12 sec street ride. in a 3300 pound car with cruiser 327 gears and a small like in 235 60 15 drag radial. fwiw, bobn

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Re: Power Estimate?

Post  hot460 on February 15th 2013, 9:03 pm

The engine is in a '72 Mark IV, a 5,000 lb. car. I am running a 3.50 Traction Lok rear end. The guy that built it told me it should make 400 hp but said it would make around 550 lbft of torque, which was what I need for this heavy car. It will light up a set of Michelins. I was hoping I'd hear that it made more HP. Someone asked about the heads and pistons. The heads were ported and pistons are flat top. Thanks for the comments.

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Re: Power Estimate?

Post  hot460 on February 16th 2013, 2:53 pm

One more thing on heads / pistons... The compression is 9.6:1. This engine was rated by the factory as having 365 bhp (SAE gross) with 10.5:1 compression. I'm wondering if Tennessee Bullitt's estimate is SAE net or if all the mods don't give you much improvement over stock.

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