horse power estimate

Old 04-14-2009, 01:33 PM
  #1  
bowhay
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Default horse power estimate

its in an 83 chevy longbed


bottom end
2 bolt main 350 bored 40 over
eagle cast stroker crank 3.75 stroke
gm preformance rods
keith black claimer flat top pistons

top end
vortec heads 62 cc chamber
comp roller rockers
voodoo 489, 491 cam
highrise dual plane and a 750 holley

compression is 11.2-1
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Old 04-14-2009, 03:24 PM
  #2  
bbchevy
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Default HP?

315-325HP.
Hope this HELPS?
Later
G 8)
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Old 04-14-2009, 04:22 PM
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bowhay
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i run that before the vortec heads
i had stock 194s with a 9.5 comp
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Old 04-14-2009, 05:14 PM
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I972Nova
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I have to agree with G. The vortec heads are better than stock 70's heads, but its not much.

Back in the day I had a Firebird with a 355 flat top motor, .488 / .510 cam, Weiand dual plane intake, 750 dp. It ran 9.0's in the 1/8 with 4.10 gears, powerglide tranny with 3200 stall converter. I switched to the vortec heads and it only ran a best of 8.93. I thought they would help it a bunch, but it was less than 20 hp I would guess.

That sounds like plenty of motor to have some fun with in your truck. My old 355 ended up in my 67 pickup. It does some good burnouts, but I have never taken it to the track.
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Old 04-14-2009, 07:36 PM
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bowhay
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they arent just stock vortecs
ive ported them and done a 3 angle valve job and had them milled from 64cc to 62cc
i dont know if that really makes a hole lot of defference though
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