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	02-16-2012 09:05 PM #1SBC 350 rebuild to run on 87 octane, Daily Driver?
 
 I am to take the stock engine to have it rebuilt here in town. I am a little confused though on what I need done. I am looking to keep the engine running on 87 octane but squeeze what I can out of it. The guy up at the shop said they would resurface the heads and install flat tops along with a mellings MTC-1 cam and i would still be able to run 87 octane.
 cam specs for MTC-1
 Cam Style Hydraulic flat tappet
 Basic Operating RPM Range Idle-4,500
 Intake Duration at 050 inch Lift 204
 Exhaust Duration at 050 inch Lift 214
 Duration at 050 inch Lift 204 int./214 exh.
 Advertised Intake Duration 278
 Advertised Exhaust Duration 288
 Advertised Duration 278 int./288 exh.
 Intake Valve Lift with Factory Rocker Arm Ratio 0.420 in.
 Exhaust Valve Lift with Factory Rocker Arm Ratio 0.433 in.
 Valve Lift with Factory Rocker Arm Ratio 0.420 int./0.433 exh.
 Lobe Separation (degrees) 112
 Computer-Controlled Compatible No
 
 
 
 I am reading that I need to stay around 8.5-8.75CR to stay with 87 octane. My current compression is 8.50 to 1 or a little under with the stock engine. 
 
 My current set up is with this as a daily driver.
 
 84 c-10 with a quadrajet
 rear end ratio, 2.73
 truck weight , 4000Lbs
 trans, turbo 350
 tires , 31" tall
 stock exhaust system, 2 pipes into one then cat and muffler.
 
 Engine Name: 350 LM1
 Horsepower: 249 HP @ 5,000 RPM
 Torque: 304 Ft/Lbs @ 3,500 RPM
 Compression Ratio: 8.50 to 1
 Block: 4 – Bolt, 2 Piece Rear Seal, 4.000” Bore
 Crankshaft: Cast Nodular 3.480” Stroke
 Heads: Cast Iron, 76cc
 Valves: 1.940” / 1.500”
 Camshaft lift: 0.390” / 0.410” Hydraulic
 Duration @ 0.050”: 195° / 202°
 
 A little confused on which set up would be best.  Last edited by BigTruckDriver; 02-16-2012 at 09:28 PM. Friends dont let friends drive fords! 
 





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