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Thread: Small block cam advice
08-11-2013, 04:09 PM #1
Ok guys. I'm thinking about putting a mild can in my engine before I put it in the truck. I don't want anything radical, just mild. I want to keep a little fuel mileage anyway. If I can improve mileage, AWESOME! Lol I won't get my hopes up. I have to do better than 10hwy
Here's the summit results. Help pick me out a cam via part number. How are the summit kits?
I don't know anything about picking cams to be completely honest. My dad always handled that department growing up
90 gmc suburban
1972 block (internally OE, TBI an intake being ported and 1" spacer being used.)
Heads stock OE
Gears- unknown (will update when I figure it out) how do I find out without removing diff cover?
700r4 trans (4wd)
Tire size is currently 235/75/15. Will change to 31's or 33's later
Plans are for towing and daily driving
Last edited by BurbanMan; 08-11-2013 at 04:20 PM.Chuckie!!!
08-11-2013, 08:54 PM #2
You want a cam with very little overlap, a little higher lift, and average duration. Read http://www.enginebuildermag.com/Arti..._camshaft.aspx for some good tips about choosing what you want.
Exhaust also matters, are you running stock manifolds, or aftermarket headers? Long tubes or shorties? Long tubes will take away from low end torque.
You could also improve the search on Summit, by adding the "Camshaft usage" filter as "Truck." The 4x4 cams listed in there will probably work well for you, as cams designed for 4x4 trucks are usually ground with low end torque in mind.
Also, if you drive in 4WD mode a lot, you should switch to 2WD for normal driving if you can. With 4WD on, you're sacrificing some power, to be able to get it all to the ground, so you lose a little MPG.
08-12-2013, 01:08 AM #3
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