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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

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Old Jun 26, 2014 | 09:45 PM
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gadowski1996
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Horsepower Problems

1971 F-100 LWB 302 bored 30 over with a holley double pumper 750cfm Elderbrock performer intake. It has a C-6 auto with 4.11 gears in a 9 inch rearend. Really trying to figure out how much HP and torque it has. Disc brake conversion all around lowered.Has 255/60/r15 all the way around.
 
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Old Jun 26, 2014 | 09:57 PM
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unless you have a super hot cam, higher compression ratio, and at least headers that carb is way overkill for a 302 i would guesstimate 220 hp and around 320 tq but who knows for sure sounds like a fun set up at least......And welcome to FTE
 
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Old Jun 26, 2014 | 10:03 PM
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Its has a .475 lift cam. I would think it would have more because of the bore. It also has a electronic ignition and a double roller timing chain. Top end power is crazy because of the 4.11.
 
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Old Jun 26, 2014 | 10:04 PM
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Pretty big carb for a small block, and a DP at that, I'd think it would bog down some with that big of Holley. That's better suited for a 390/428 cu in

Dp's carbs don't do so well on these heavy of vehicles.

May be Mike will chime in and give you some idea on what you wanting to know.

Orich
 
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Old Jun 26, 2014 | 10:10 PM
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I was planning on running two 600s. With the set up I have i have ford racing heads that are rated for a 600 lift cam.Would I need a bigger bore i have a 3inch stroke do I need to go bigger?
 
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Old Jun 27, 2014 | 12:08 AM
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Is that you clay101196?
 
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Old Jun 27, 2014 | 09:15 AM
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your engine is drowning , 750 wayyyy to big for a 302
 
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Old Jun 27, 2014 | 12:55 PM
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302 with a 750 DP? Crack that throttle anymore than 1/2 way and It'd be like flushing a toilet.
 
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Old Jun 27, 2014 | 04:00 PM
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Originally Posted by MIKES 68 F100
your engine is drowning , 750 wayyyy to big for a 302
Unless it's turning a sustained 8,500 RPM....
 
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Old Jun 27, 2014 | 09:04 PM
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Originally Posted by BryanMichael1989
Is that you clay101196?
Maybe it is, he describes a very similar rig.
 
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Old Jun 27, 2014 | 09:04 PM
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Originally Posted by BryanMichael1989
Is that you clay101196?
ROFLMAO!!!!!
 
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Old Jun 27, 2014 | 09:10 PM
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Nah it ain't him. Not unless his truck got a year newer and he switched cams and rear end gears.
 
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Old Jun 27, 2014 | 09:14 PM
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Originally Posted by gadowski1996
Its has a .475 lift cam. I would think it would have more because of the bore. It also has a electronic ignition and a double roller timing chain. Top end power is crazy because of the 4.11.
Not trying to insult you here, but none of that is related.

Cam lift does not have any relation to cylinder bore.

4.11 gears would create LOW end power. But the engine makes the same amount of power no matter if it had 7.21 or 2.72 gears.


How new are you to this kinda stuff?

Again, no offense meant, but your confused.
 
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Old Jun 27, 2014 | 09:56 PM
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Kind a Sounds like the young man with $2k wanting 400-450 HP from a 302.
I'll bet he's got a high performance double roller timing chain also.
orich
 
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Old Jun 27, 2014 | 10:20 PM
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My 383 windsor stroker is real happy with a 650 speed demon vacuum sec.
 
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