ignition advance issue

[Grumpy]

Alot of you have followed me over the last few years and know of the countless issues I have had building my 61 Impala. I am having timing issues with my 90s oem roller 357 chevy engine in my 61 Impala. Around 10 to 1CR, cam around 224 duration at .050 with .492 lift on a 110LSA. I am running Short water pump, so we are using a timing mark to the right of the balancer. Also Pertronix billet ready to run dizzy with ignitor II inside and vacuum advance. Eddy 1406 600 carb. Aluminum heads, NGK iridium plugs and MSD 8mm wires. When we put timing light on motor while running, it will show as low as 1 degree of initial timing, yet when we give her gas goes all the way up to 36-41 buy 3200rpms. We got the motor running alot better, but still the timing will jump around no matter what we do. I am thinking that it is the weights and springs in the dizzy. I have read online that alot of guys have had issues with the internals on the Pertronix dizzys. What do you guys think is going on, and what do you recommend. My motor has less then 50 miles and I am going to sell my Impala once I get this resolved. BTW motor is very strong, great compression, purrs once you get over 2500rpm.

guessing , assuming, and not verifying reality,is a waste of time and effort!
deal in proven, verified FACTS
READ THE LINKS
GET AN ACCURATE TIMING LIGHT
GET A DAMPER TIMING TAPE

AND A PISTON STOP
step one is verify TRUE TDC and your timing marks and damper all AGREE, if they don,t your pissing into the wind until you get that reading correctly

http://garage.grumpysperformance.com/index.php?threads/finding-top-dead-center.967/

http://garage.grumpysperformance.com/index.php?threads/timing-tabs-and-indicators.1015/

http://www.superchevy.com/how-to/ad...now-about-vacuum-advance-and-ignition-timing/
STEP TWO
VERIFY YOUR TRUE IGNITION ADVANCE CURVE

http://garage.grumpysperformance.com/index.php?threads/verifying-your-real-advance-curve.4683/

step three, is changing your ignition advance to whats required,
once you have a consistent and repeatable base ignition timing curve you can make changes as required and test the results to find out if its the initial timing or the distributor internal mechanical, or electrical parts or the ignition advance curve or some other factor that needs tweaking

http://garage.grumpysperformance.com/index.php?threads/advancing-the-ignition-timing.1809/

http://garage.grumpysperformance.co...ouble-shooting-rebuilding-hei-ignitions.2798/

this is usually a good starting base line, for your ignition advance curve