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Old 2007-02-09, 15:09   #1
tyrelmidgett
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Horsepower on stock 302 1974

Hey guys i am trying to replace the 250 I6 with the 302 V8. I have found a remanufactured engine that I am going to convert to EFI but need to know how much horsepower it can handle before everything cracks. Does anyone know if 300-385 bhp is to much? Has anyone tried to convert their 302's from carb to EFI?
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Old 2007-02-09, 15:18   #2
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If your going to replace your motor, don't buy a remanufactured 74 302, I think it's around 185 HP from the factory (not very much, I could be off with 185) the stock compression is pretty low, save your money and buy a rebuilt or good original 302 roller motor.
I've just spent $2000.00 on one of my 74 302's (just the short block) and think it would have been better spent on one of the roller motors I have.
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Old 2007-02-09, 15:41   #3
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I have the 74 and it only has 8:1 compression, as low as they ever went. I don't think it had even 180 hp stock (I don't know for sure), I would have guessed more 130-150 (flywheel).

Many guys are getting 500 hp consistently, then cracking the block if they go too much over that, so building a 400-450 hp engine should be strong and safe.
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Old 2007-02-09, 16:30   #4
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if you go with a 302, dont rebuild it to stock. rebuild it with the same amount of cash, maybe a little more and get some power out of it.

it all depends on what you want to do with it.. drag.. street.. play around, or daily driver
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Old 2007-02-09, 17:35   #5
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Just found this on THIS SITE!!!

1973--302-8 horsepower drops to 138, compression down to 8.0:1
1974--302-8 rises back to 140 hp (from 138) (that makes me RIGHT ON correct with my estimate of 130-150!!! )

But I am pretty sure it is not because of a compression change.

Entire site is here http://www.maverick.to/grabber/mavchanges.html
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