Torque is the main factor, proboly both cams make around 360 hp. Camshaft, Hydraulic Roller, Duration 270 Int./270 Exh., Lift 0.570 Int./0.541 Exh., Lobe Separation 118, Chevy, LS, 3-Bolt, GEN III/IV, Each. What kind of power differance would the Isky be over the GM.
It is going in my 80 Camaro, (396) TH350(trans-go shift kit),3000 TCI stall 3.73's, 255-60-15 tires out back, 3" exhaust w/H-pipe and 40 series delta race flows, 2" primary headers( I know its to big of a system for a stock engine, but it looks Bad-Ass). I've adjusted them 1/2 to 3/4 turn once warmed up and they sound like a mechanical lifter. I am looking for driveability and reliability out of this enging. I have installed a comp 270 cam, comp magnum hydraulic flat tapped lifters and Comp roller rockers. 480 lift 292 duration, ported 64 CC Double Hump heads, Full roller rockers, Holley Street D. With the cam swap I want to do an intake manifold swap as well. A typical performance 350ci SBC that makes +/- 400Bhp and favours a. C3 Tech/Performance - COMP CAMS Magnum 270H in a '77 L-48 - I was wondering if anyone out there was using one of these cams in a L-48 I will be installing Dynomax 1-5/8 headers soon with true duals. The one I was thinking about is #12353920(cam kit) and its recomended for 396-427, 9.5-10.75-1 comp, 3000-3400 cruise rpm, 2200-5700 (6500 atainable with proper valve springs and lifters), 228/238. Currently the cam in the car is a Comp Magnum 270HR, 215/215 w/. The 350HP-327 cam was used in tens of thousands or even hundreds of thousands of daily drivers. Harmonic Balancer Torque Specs Dorman Applications Torque Spec 594-001 1990-88 3.8L (231) Buick, Chevrolet, Oldsmobile, Pontiac 219 lbs 594-002 1996-69 5.7L (350) Chevrolet, GMC Truck 75 lbs 594-003 1990-88 3.8L (231) Buick, Chevrolet, Oldsmobile, Pontiac 219 lbs 594-004 2000-95 3. I was thinking of swaping that for a Isky 270 mega, but was wondering if a GM performance cam be better.
Now it has a Lunati cam that is almost the same specs as the Eddie Torker, just 114 centerline. 0:00 / 0:10 Comp cams magnum 270h 350 chevy DirtJunkie Subscribe Share 13K views 7 years ago Here's my 350 with a comp 270h, idles around 550. 480 Lift 1 3/4' Headers 93 Octane Pump Gas. Heres what Im looking at: 350 4 bolt 60 over Std 350 crank 6inch rods w/ flat top pistons (4 valve relief) balanced Sportsman IIs 72cc 2.02/1.60 valves (going to port & polish them) Edelbrock Performer intake 750 Rochester Q-jet 2100 stall converter 3. 500"/.I have a 396, stock 350 horse model. 350 cid Small Block Chevy Package AFR 180cc Street Heads 9 to 1 Compression. Looken at Comp Cams Magnum (hydraulic)270H or 280H but cant decide. ON NO ACCOUNT use these settings before the maximum advance on the distributor has been correctly limited. 270/270 Advertised Duration, 224/224 Duration. Below is a table of advance requirements and expected idle speeds for a range of cam specifications. Best with mild converter, headers, 9:1 compression and lower gears.
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