350 Timing - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chevy00 · 03-24-2002, 01:38 PM

I need timing figures for a '71 Cheyenne w/ 350 & automatic. After replacing the stock distributor, I set the initial advance at 8 deg w/o the vacuum advance connected. It runs nice, but I am wondering where it is really supposed to be? Any help is appreciated.

Chevyman69 · 03-24-2002, 02:16 PM

I assume you replaced the stock distributor with HEI. Either way an HEI equipped SB 350 that is stock or even a little warmed over runs great at 8 degrees, thats where I set mine too.

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69 CST 10, 402, steel crank, heavy rods, Federal Mogul Forged Pistons, 9.9:1 compression, polished ported 781 heads 2.19/1.88 manley stainless valves, Crane Powermax Hydraulic roller 288/296 and .587,.610 lift, hardened pushrods, Crane Roller Rockers, Weiand Action Plus, 750CFM Rochester QJET, MSD HEI, MSD 8MM Wires, Dynomax Ceramic coated headers, should be about 500 H.P. 700R4 2500 stall, pretty nasty shift kit, 373 Auburn Pro Series Posi, buckets/console air/tilt/tach 4wheel discs

Daily Driver: 92 Chev Reg Cab LWB Silverado 4x4, loaded, 350 Accel filter/cap/rotor/coil/AC Delco wires/AC Delco RapidFire plugs, Edelbrock intake and headers, 180 degree thermostat, Hypertech Thermomaster Chip, true duals 700R4 with B@M Shift Kit for now!

69 longhorn · 03-24-2002, 04:35 PM

On a stocker with HEI,I would try a 10-12 BTDC setting. listen to what the engine wants,go pull a few hills.....if it spark rattles,its too much. If you dont have enough timing,it will put a dent in perfomance/milage........69 longhorn.

704x4 · 03-24-2002, 07:22 PM

well said 69 longhorn

03-24-2002, 01:38 PM	#1
Chevy00 Registered User Join Date: Apr 2000 Posts: 26	350 Timing I need timing figures for a '71 Cheyenne w/ 350 & automatic. After replacing the stock distributor, I set the initial advance at 8 deg w/o the vacuum advance connected. It runs nice, but I am wondering where it is really supposed to be? Any help is appreciated.

03-24-2002, 02:16 PM	#2
Chevyman69 Vortec 350's Suck Join Date: Nov 2000 Location: Pickardville Alberta Canada Posts: 544	I assume you replaced the stock distributor with HEI. Either way an HEI equipped SB 350 that is stock or even a little warmed over runs great at 8 degrees, thats where I set mine too. ------------------ 69 CST 10, 402, steel crank, heavy rods, Federal Mogul Forged Pistons, 9.9:1 compression, polished ported 781 heads 2.19/1.88 manley stainless valves, Crane Powermax Hydraulic roller 288/296 and .587,.610 lift, hardened pushrods, Crane Roller Rockers, Weiand Action Plus, 750CFM Rochester QJET, MSD HEI, MSD 8MM Wires, Dynomax Ceramic coated headers, should be about 500 H.P. 700R4 2500 stall, pretty nasty shift kit, 373 Auburn Pro Series Posi, buckets/console air/tilt/tach 4wheel discs Daily Driver: 92 Chev Reg Cab LWB Silverado 4x4, loaded, 350 Accel filter/cap/rotor/coil/AC Delco wires/AC Delco RapidFire plugs, Edelbrock intake and headers, 180 degree thermostat, Hypertech Thermomaster Chip, true duals 700R4 with B@M Shift Kit for now! __________________ 69 Chev CST 10 reg cab lwb Daily Driver: 92 Chev Reg Cab LWB Silverado 4x4, K.I.A 7:51 AM 04/22/03 Will be resurrected

03-24-2002, 04:35 PM	#3
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	On a stocker with HEI,I would try a 10-12 BTDC setting. listen to what the engine wants,go pull a few hills.....if it spark rattles,its too much. If you dont have enough timing,it will put a dent in perfomance/milage........69 longhorn. __________________ http://community.webshots.com/user/hotrodhorn

03-24-2002, 07:22 PM	#4
704x4 Registered User Join Date: Feb 2002 Location: Greene, Iowa Posts: 150	well said 69 longhorn __________________ 70 3/4 ton 4x4 FOR SALE Greene, IA



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