another hp guess? - 460 Ford Forum
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post #1 of 11 (permalink) Old 11-20-2012, 09:01 AM Thread Starter
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another hp guess?

Ive got a 11:1 .040 over 429. Heavily ported c9ve-a heads slightly larger valves, edelbrock performer intake, going with a 750 holley, and working on a custom cam. Also i think 1 7/8 headera will work pretty well. What kind of crank hp do you guys think ill be looking at?
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post #2 of 11 (permalink) Old 11-20-2012, 11:18 AM
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Kinda depends on the cam.


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post #3 of 11 (permalink) Old 11-20-2012, 01:22 PM Thread Starter
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any recomendations on cam?
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post #4 of 11 (permalink) Old 11-20-2012, 07:38 PM
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Way to hard to guess with so little information. 11:1 compression with a Performer intake is a bit of a goofy combination as well. That high of compression can use a lot more cam than that intake will like.

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post #5 of 11 (permalink) Old 11-21-2012, 06:28 AM Thread Starter
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May not be a performer for sure. But im trying to stay with a lower rpm 6200ish dual plane street style motor. How much cam should i be looking at. I didnt plan foe 11:1 just kinda happened with the parts i have.
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post #6 of 11 (permalink) Old 11-21-2012, 08:50 AM
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Originally Posted by stangman95 View Post
May not be a performer for sure. But im trying to stay with a lower rpm 6200ish dual plane street style motor. How much cam should i be looking at. I didnt plan foe 11:1 just kinda happened with the parts i have.
How did you arrive at 11:1? Did you actually measure everything, or are you going off published figures?

A 429 with flat tops .020 in the hole, and 75cc heads will likely be closer to 10.25:1.....which can work with pump gas. If you really have 11:1 compression, pump gas will be "challenging".

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post #7 of 11 (permalink) Old 11-21-2012, 10:57 AM Thread Starter
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well to be honest I havent actually measured everything up yet to be certain, I was more going off of numbers i have found, per what TRW says and the cc of the c9's. its a thinner head gasket. I have never really messed with the stock type stuff like this before. I have always messed with high compression big bore motors.
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post #8 of 11 (permalink) Old 11-22-2012, 11:21 PM
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Am I the only one that thinks a 750 is too small?

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post #9 of 11 (permalink) Old 11-23-2012, 11:27 AM
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Am I the only one that thinks a 750 is too small?
750 is to small if it was bone stock
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post #10 of 11 (permalink) Old 11-23-2012, 07:06 PM Thread Starter
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Only reason i said 750 is because its what i have. Ive seen several stock 460 trucks with 650s never have a problem. Never ran lean or anything noticeable. So am i better off using a 850?
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post #11 of 11 (permalink) Old 11-23-2012, 08:45 PM
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i did have a 3310 750 vac sec on my cruiser. the change to a 850dp proform made a noticeable difference in the launch. car definitely liked it. btw i do have a rather lame *** cam. bobn
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