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Old 06-22-2011, 10:21 PM
jimang jimang is offline
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chevy 350 build help

Hello, i am new here and been reading a lot, thank you for all the info everyone puts on here.

To start i been trying to build my 79 vet and could use a little help.
It's a chevy 350, Crank i believe is stock # 3832442 seen its out of 78 to 88 heavy duty 4 bolt 2 piece rear seal. Heads are World Products s/r 1-052, Rocker arms are comp steel 1.52 ratio, i know pistons are .60 over cant remember what they are, torque converter is 1,700 to 2,100 stall, flex plate 168 tooth internal balance, stock distributor, headers, elelbrock 1406 600 cfm, nothing has been done to automatic tran, stock rear end. i have tried couple cams.********* first cam was a summit cam Cam Style Hydraulic flat tappet
Basic Operating RPM Range 2,400-6,000
Intake Duration at 050 inch Lift 224
Exhaust Duration at 050 inch Lift 234
Duration at 050 inch Lift 224 int./234 exh.
Advertised Intake Duration 282
Advertised Exhaust Duration 292
Advertised Duration 282 int./292 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.465 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.488 in.
Valve Lift with Factory Rocker Arm Ratio 0.465 int./0.488 exh.
Lobe Separation (degrees) 114

************2nd cam was Cam Style Hydraulic flat tappet
Basic Operating RPM Range 2,500-6,400
Intake Duration at 050 inch Lift 243
Exhaust Duration at 050 inch Lift 257
Duration at 050 inch Lift 243 int./257 exh.
Advertised Intake Duration 295
Advertised Exhaust Duration 313
Advertised Duration 295 int./313 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.500 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.486 in.
Valve Lift with Factory Rocker Arm Ratio 0.500 int./0.486 exh.
Lobe Separation (degrees) 107
Computer-Controlled Compatible No
Grind Number 295TH7

nether was good choose, the thumper cam sound good ran baaaadddddddd!!!!!!!

i removed the valve covers an seen that the number 5 and 6 cyllinder compression side rocker arms where barely moving and there was a popping noise from exhaust, ran good at idle and ran bad in gear.

now i am lost picking new cam. like i said i am new but reading alot. I would like it to sound health and run good. i want to keep adding to this car little at a time. i know i really need to know the compression ratio.but dont understand it all yet still reading, i have the cam out at this point. where do i start to do this right. i know a got a lot to go. i dont drive this car to work or on long trips. want to burn out and move when i want to. please any help. thank you for your time
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