351W 428 Stroker What kind of HP - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
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post #1 of 4 (permalink) Old 01-25-2014, 02:23 PM Thread Starter
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351W 428 Stroker What kind of HP

Engine 428CI
351w .040 over
4.170 stroke 400M crank offset ground
eagle H beam rods probe forged pistons
Victor jr heads bowl work 2.05/1.60
cam 242/252 @.050 114 centerline
All EFI TF 351w intake port matched
80mm TF 80mm Mass air
36lb injectors
1 3/4 long tube headers
3 inch dual exh.
10.1 comp ratio
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post #2 of 4 (permalink) Old 01-25-2014, 07:32 PM
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Re: 351W 428 Stroker What kind of HP

488.3487658921 average HP

Dennis

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post #3 of 4 (permalink) Old 01-25-2014, 11:12 PM
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Re: 351W 428 Stroker What kind of HP

LOL. Welcome to the Forums, autopart101. Actually, I would have to say less than Dennis' joking thin-air number. In-part due to the intake, and mostly the throttle body. An 80mm TB is rated about 370hp under commonly accepted pressure drop and velocity calcs and comparison to factory TB sizings. While it will do more than that, I think the the increases would rapidly diminish and tend to strangle it. Although if a larger one is used, the street drivability would diminish without progressive linkage, and the likelihood of 'tip-in' lean-out is also increased with factory-based ECMs. The injectors are sized well for just under 500hp at a standard 85% duty cycle though.

David

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post #4 of 4 (permalink) Old 01-26-2014, 05:48 AM Thread Starter
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Re: 351W 428 Stroker What kind of HP

Quote:
Originally Posted by PSIG View Post
LOL. Welcome to the Forums, autopart101. Actually, I would have to say less than Dennis' joking thin-air number. In-part due to the intake, and mostly the throttle body. An 80mm TB is rated about 370hp under commonly accepted pressure drop and velocity calcs and comparison to factory TB sizings. While it will do more than that, I think the the increases would rapidly diminish and tend to strangle it. Although if a larger one is used, the street drivability would diminish without progressive linkage, and the likelihood of 'tip-in' lean-out is also increased with factory-based ECMs. The injectors are sized well for just under 500hp at a standard 85% duty cycle though.

David
Thanks for the reply. The flow info I have is an 80mm TB flows 873cfm and suports 582 hp.
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