Take a look at the following smaller Melling cams ALL w/ 110* LSAĪnd any of the above three should work just fine with the stock springs OE 80 lbs on seat it'd be nice if your guy installed new ones as they're rather cheap.
That's the bottom rung.įwiw, CS274 is a Sealed Power number and is direct cross to above same cam. If you want even a little more CCS-2 ain't it. there's no difference or none significant between CCS-2 and the OE stock cam in a OE dish-piston, low-compression smog-motor RPO LM1 aka L48 aka ZQ8 (all Base 4 bbl 350).
My Melling cat says CCS-2 is 258*/269* ADV. Intake valve closing on that is 63 degrees. Lets look at the 268H high energy intake valve closing 60 degrees. The 280H wanted 6500 and -7000 rpm shifts.īut max HP spread was only 150 RPM between the 2 camshafts. Small 601's with 1.84-1.50 valves But best shift RPM at the track for the 268H was 5500 RPM for the 1-2 shift and hold 2nd gear to 6000 or 6500 it did not matter it was the 1-2 shift that made 2 tenths difference. I stuck in a 280H on a 110 and made max wheel HP at 5,850 RPM Same heads and everything. My custom ground 268H on a 106LSA made max power at 5700 RPM and on a 112 made the same at the same RPM. Now just because an engine revs to that RPM does not mean it is making max power at that rpm. With ported heads holding 1.84 or 1.94" intake valves it would twist to 70 rpm. Ran it in a 355 one time with 305 2 barrel heads 1.72-1.50 valves Ported of course. Then the 280H rated at 2000-6000 RPM and. Head flow will make a huge difference in RPM Stuck Ported 601 onto it and gained 1000 RPM on the shifts. That was a 350" with RPM intake and 750 carb and headers 487X heads. Stock non ported heads with stock valves run out of steam with that 268H at 5500 rpm so quite accurate. Take the Comp high energy 268H for example it is. Rated camshaft RPM is as accurate as comparing advertised duration without knowing at what lift.
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