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Old 02-09-2011, 09:22 PM
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350 with s/r i-052 heads whats the hp

ok im a complete dummy and need some help, i did do a little research prior to asking though. i have a 350 bored .60 over with 67cc heads(i-052) 272/284 crane cam aluminum intake and headers and roller rockers. i know this is probably not enough but what kinda hp am i looking at?

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Old 02-09-2011, 09:49 PM
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If the "I052" is from the heads, it's a date code. Sept. 5 of a year ending in 2.

You need the long number from under the valve cover that will be something lime 333882 or 3923441 as an example.
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Old 02-09-2011, 10:01 PM
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thats whats stamped on the heads under the valve covers
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Old 02-10-2011, 08:12 AM
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Quote:
Originally Posted by 86---chevy
thats whats stamped on the heads under the valve covers
That's SOME of what's under the valve covers. The numbers should be cast into the head- raised up from the surface- not stamped into the surface.

Look harder and you should find the casting numbers- unless these are aftermarket heads of some sort. Below are the numbers from a Vortec head as an example:

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Old 02-10-2011, 03:40 PM
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the heads are aftermarket s/r 67cc 2.02 intake/1.60 exhaust made by world products the cam is crane cam #113942 dont really know how to judge the lift of the cam.
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Old 02-10-2011, 04:00 PM
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Quote:
Originally Posted by 86---chevy
the heads are aftermarket s/r 67cc 2.02 intake/1.60 exhaust made by world products the cam is crane cam #113942 dont really know how to judge the lift of the cam.
CAM SPECS:

Cam Style Hydraulic flat tappet

Basic Operating Range 1,800-5,600 RPM

Intake Duration at .050" Lift 216

Exhaust Duration at .050" Lift 228

Advertised Intake Duration 272

Advertised Exhaust Duration 284

Intake Valve Lift with 1.5 Rocker Arm Ratio 0.454"

Exhaust Valve Lift with 1.5 Rocker Arm Ratio 0.480"

Lobe Separation 112

Grind Number H-272-2
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Old 02-10-2011, 04:05 PM
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i have read those specs but which one describes the lift ...... in other words if you ask what lift cam ........what would i say. so is this high performance cam and heads? like i said im learning bear with me i appreciate it.
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Old 02-10-2011, 05:34 PM
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Quote:
Originally Posted by cobalt327

Intake Valve Lift with 1.5 Rocker Arm Ratio 0.454"

Exhaust Valve Lift with 1.5 Rocker Arm Ratio 0.480"
These are the lift numbers
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