preludewillie

iTrader: (1)

I've been checking around, but can't seem to get a solid answer for my question. I have an ls with pr3 pistons and delta 272 cams. Head has been milled .030. I recently degreed the cams. I ended up with +2.5 on the exhaust cam, and -4 on the intake cam. Before taking it to get street tuned (car will never see the dyno), I decided to double check my ignition timing. I did everything as far as the basics are concerned. Jumped the service check connector, operating temp, even unplugged the iacv since the idle was set a little higher to keep the engine from stalling when the cams were first installed. With the head being milled, and the cam @ -4 degrees, I can't get enough adjustment out f the distributor. To get it to run without ******* from a stop, it's all the way advanced, and it looks to be about 15 degrees. So here are my questions:

Is this common?

Is my new base ignition timing actually 24 degrees for the amount of intake retard? (2 degrees ign for every 1 on the cam gear)

Do I leave the distributor all the way advanced where it is now, and have my tuner add the extra (approx) 9 degrees across the board to get from 15 to 24?

Other cams have not had this much adjustment before, so I've never encountered this. Thank you!

odz-fab

if distributer is maxed out with adjustment than add or subtract x amount of total timing in your timing maps to so that you true timing for your tune is on point. make a note of what the timing change was so that future changes can be reversed if distributer adjustment can corrected.

cruizinmax

iTrader: (2)

You set the base timing at 16 degrees, no other calculations. You are only 1 degree retarded from where it should be.

raverx3m

iTrader: (1)

if you are using a remanufactured dizzy thats what you get most of the time. they are not calibrated properly and max out with stock settings giving you no play.

i had exact same issue when dynoed my car first time