General Category > Quadrajet Carb Talk and Tips
cam selection
tayto:
Cliff we talked last Sunday on the phone about selecting a roller cam for my 350. To refresh your memory it's a 350 bored .030" over with flattop pistons. squish will be in the in the .035-.038
Cliff Ruggles:
What are the rest of the engine specs?
Static compression ratio?
What brand?
What cylinder heads?
Type of vehicle?
Auto or stick shift?
Converter stall speed?
Rear gear ratio?
Intended use of the vehicle, etc?
tayto:
--- Quote from: Cliff Ruggles on August 28, 2018, 05:45:20 AM ---What are the rest of the engine specs?
Static compression ratio?
I think with flattops bored .030 over, .035 squish and 64cc heads its in the 10.2-10.3 range
What brand?
SBC 350 roller block
What cylinder heads?
191 TBI heads, 64cc
Type of vehicle?
1986 GMC 1500
Auto or stick shift?
Auto
Converter stall speed?
1800
Rear gear ratio?
Has 3.08s but I will be going to 4.11s
Intended use of the vehicle, etc?
Hauling/towing, want a nice driver
--- End quote ---
My answers are in BOLD. I need cam to have a fuel pump lobe, I do not want to retrofit an electric pump. There is a cam grinder locally that can grind to my specs. but i wil have a reduced base circle and have to run longer push rods.
We talked about the 350 TPI cam, 202/207 @ .050 .404/.4 114.5 LSA. These apparently have a fuel pump lobe on them even though they were used in a fuel injection application. You had mention when we talked about something in the 210 duration and no less than 112 LSA.
Cliff Ruggles:
Will your cam grinder to a HR grind or are you talking flat tappet?
tayto:
Hydraulic roller
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