Timing retarding 2* after installing crank trigger

colormebad · 04-18-2016, 02:12 PM

I'm running a 7AL-3 Black Ignition' Just installed a sbf used crank trigger..... Set the sensor with one of the magnets, locked on 30* and turned the dist to #1 ... Fired right up. Looks rock solid till I rev the engine, then it retards 2 degrees.... I have tried everything with no luck... The sensor wires match the wires going to the 7AL-3 , but reversed them and timing advanced 20 * so switched back... Crank trigger wheel is on right side' with arrow on outside turning clockwise... Sensor is about 50 airgap from trigger wheel..
Things I tried below...
Tried another but used sensor
Tried another crank trigger wheel
Tried a used digital 7
Just tried a new out of the box digital 7
Have 0 chips in retards not using and ran gnds also
Ran gnds from aluminum heads to frame
Using flaming river self powered regular timing light ' but tried 3 others
Put light on # 6 cyl and still same thing
Even though I have heavy gnd's and hot at rear and front of car, ran 10 gauge + & - from 7AL3 to batt
Intsalled a new I had laying around , shielded cable from sensor to ign box...
Timing was off 2* on balancer when I first built the motor' went back yesterday with a dial indicator in #1 cyl and made sure it was still the same...
MSD has went out of their way trying to help me but said they didn't know what else to try..
Anyone here ever have this problem ?? thanks

04-18-2016, 02:12 PM	#1
colormebad Junior Member Join Date: Apr 2016 Posts: 8 Likes: 0 Liked 0 Times in 0 Posts	*Timing retarding 2 after installing crank trigger** I'm running a 7AL-3 Black Ignition' Just installed a sbf used crank trigger..... Set the sensor with one of the magnets, locked on 30* and turned the dist to #1 ... Fired right up. Looks rock solid till I rev the engine, then it retards 2 degrees.... I have tried everything with no luck... The sensor wires match the wires going to the 7AL-3 , but reversed them and timing advanced 20 * so switched back... Crank trigger wheel is on right side' with arrow on outside turning clockwise... Sensor is about 50 airgap from trigger wheel.. Things I tried below... Tried another but used sensor Tried another crank trigger wheel Tried a used digital 7 Just tried a new out of the box digital 7 Have 0 chips in retards not using and ran gnds also Ran gnds from aluminum heads to frame Using flaming river self powered regular timing light ' but tried 3 others Put light on # 6 cyl and still same thing Even though I have heavy gnd's and hot at rear and front of car, ran 10 gauge + & - from 7AL3 to batt Intsalled a new I had laying around , shielded cable from sensor to ign box... Timing was off 2* on balancer when I first built the motor' went back yesterday with a dial indicator in #1 cyl and made sure it was still the same... MSD has went out of their way trying to help me but said they didn't know what else to try.. Anyone here ever have this problem ?? thanks