You can start with any of those listed above and then build around it.Chevrolet small-block engine (first and second generation) I can attest that everything you do will lead to changing something else if you dont start with a solid game plan from the start.Ĭompression ratio, stall converter, tire size, transmission, gear ratios and intake type will all dictate what kind of cam will give you most power. I am no expert on the performance side of things but have built a few gasoline and large diesel engines, but just recently built a 383 stroker. With a high lift/high pressure cams, those press in studs will pull right out causing engine failure. High lift cams tend to drop valves if you dont have enough spring pressure.Īlso, you really need to look into screw in studs and guide plates. Personally I would have the spring pockets machined to accept high lift and use high performance springs. They are built for this intended purpose. For one, if you trying to gain lift then go with the Beehive springs comp cam offers. But for a budget build, it should still run pretty well.
You're pretty limited on lift with the Vortec heads unless you do some machining, and you'd be better off with a 2.02/1.60 head anyway. Upgrade the heads, and use a good cam in the 2500-6500 rpm range, and you'll get there. Personally, I think expecting north of 400hp from that combo is pushing it. It's been a really great motor for the street, and has decent manners in traffic.ĭo what you will with that info. Compression is just a hair under 11:1, and it runs just fine on 93 octane. It's a little lazy down low, but pulls like a freight train from 3500 to 6000 rpm.
I'm making just about 425hp, on a Vortec 350 block and bottom end (motor had 10,000 miles on it, so it didn't need any cylinder work or bearings, but I re-assembled with ARP fasteners, since it sees 6500rpm occasionally), Keith Black 10.8:1 pistons, cleaned up 70cc Performer RPM heads, upgraded springs, solid pushrods, scorpion 1.5 full rollers, Comp XR294HR cam, Performer RPM Air Gap intake, tweaked Holley 670 carb, full MSD ignition (box, coil, distributor), Hooker Super Comps, and a few other goodies.
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