Timing questions.. can you help?

03-20-2001, 10:26 PM

my cam is cut 4 degrees advanced ok so what ignition timing should I run.. is it the same as if the cam was cut on zero? or do i give it 4 more or less degrees.. somebody help me out here cause we all are confused here.. thanx guys

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SOLD THE 87GT, .. GT40, 70mmTB, 75mmBullet, 24lbinjectors, cold air induction, Edelbrok 6025 Rpm's, Inch phonolic spacer, tall FMSvalve covers, an SFI balancer, Canton 7quart, the shortblock... Lunati 51025 (224/232 .535/. 544 @112 deg) Ross lightweight pistons (10:1) Eagle H-Beams, Total Seal plasma Moly Rings, Clevite bearings, ARP throughout, FMS main Girdle&Studs, Forged Crank, of course HV-OilPump and hardened FMS shaft, Dual Friction centerforce, T5, and 4.10's Longtubes and 2.25 tail pi

moosejaw · 03-21-2001, 03:22 PM

Go ahead and use normal timing for your Ignition. The cam is setting valve timing which affects the general shape of the power band.

An advanced cam will lower the torque peak somewhat at the expense of top end power. A retarded cam will raise the power peak somewhat at the expense of low end torque.

These are not huge gains or losses but merely a movement in RPM of where the peaks will occur.

A for how your cam will effect timing....
The lower RPM torque peak will allow a little more timing on the bottom end. Experiment with the timing once the motor is broke in to see how much you can add.

Mike

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Live near St.Louis?
Check out Mustang Muscle and Dyno in High Ridge, MO
Check out my ride.

03-20-2001, 10:26 PM	#1
87GTman Guest Posts: n/a	Timing questions.. can you help? my cam is cut 4 degrees advanced ok so what ignition timing should I run.. is it the same as if the cam was cut on zero? or do i give it 4 more or less degrees.. somebody help me out here cause we all are confused here.. thanx guys ------------------ SOLD THE 87GT, .. GT40, 70mmTB, 75mmBullet, 24lbinjectors, cold air induction, Edelbrok 6025 Rpm's, Inch phonolic spacer, tall FMSvalve covers, an SFI balancer, Canton 7quart, the shortblock... Lunati 51025 (224/232 .535/. 544 @112 deg) Ross lightweight pistons (10:1) Eagle H-Beams, Total Seal plasma Moly Rings, Clevite bearings, ARP throughout, FMS main Girdle&Studs, Forged Crank, of course HV-OilPump and hardened FMS shaft, Dual Friction centerforce, T5, and 4.10's Longtubes and 2.25 tail pi

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03-21-2001, 03:22 PM	#2
moosejaw Registered Member Join Date: Apr 1999 Location: St.Louis,MO Posts: 274	Go ahead and use normal timing for your Ignition. The cam is setting valve timing which affects the general shape of the power band. An advanced cam will lower the torque peak somewhat at the expense of top end power. A retarded cam will raise the power peak somewhat at the expense of low end torque. These are not huge gains or losses but merely a movement in RPM of where the peaks will occur. A for how your cam will effect timing.... The lower RPM torque peak will allow a little more timing on the bottom end. Experiment with the timing once the motor is broke in to see how much you can add. Mike ------------------ Live near St.Louis? Check out Mustang Muscle and Dyno in High Ridge, MO Check out my ride.