Thread: timing issues...

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working on a stroked 351w . it has the comp cam mutherthumper cam in it, edelbrock heads, victor intake, roller rockers,and msd ignition. here is the problem.... when it is up to operating temp, and you shut it off, it wants to hard start, like the battery is really weak. it does have a dual electric fan on it. could it be drawing too much voltage from the battery, or am i looking in the wrong direction. it is timed 14 degrees initial, is that too much, or not enough? i had it at 8 degrees, but it was slow to respond, and didnt seem to have much power.all internals are new, but it also has low idle vacuum (8 inches)i have never had any trouble setting up fresh engines, but this one is really giving it to me... help please!!

What's the starter draw in amperage numbers??? Most shops have a gauge they can check the draw with while the engine is cranking...

IMO, too much initial timing....Does the distributor have vacuum and mechanical advance, and what rpm's are they coming in at????

A little trick we use on the high compression drag engines that don't have the retard at start feature in the box is to have a separate toggle switch for the lead going to the distributor to power it up.... You can flip the switch off, no voltage to the distributor, turn the key on, hit the starter button and when it has turned over a couple times then flip the switch in the ignition wire to on and power up the distributor....

Try retarding the timing a little.

Originally Posted by camaro mike

working on a stroked 351w . it has the comp cam mutherthumper cam in it, edelbrock heads, victor intake, roller rockers,and msd ignition. here is the problem.... when it is up to operating temp, and you shut it off, it wants to hard start, like the battery is really weak. it does have a dual electric fan on it. could it be drawing too much voltage from the battery, or am i looking in the wrong direction. it is timed 14 degrees initial, is that too much, or not enough? i had it at 8 degrees, but it was slow to respond, and didnt seem to have much power.all internals are new, but it also has low idle vacuum (8 inches)i have never had any trouble setting up fresh engines, but this one is really giving it to me... help please!!

go to 12 degrees, you have to much initial.