3503 setup

[67chevy]

I have two questions and hope someone can help. I run a pro flo 3503 on a 350 chevy, the manual says to set base timing at 10 deg. at 1500 rpms. Is this the correct rpms I would think it should be set at idle speed. Last wuestion, can you drive car with the idle control torned off.

[J.Wagner]

The 1500 rpm is used to load the engine a little to stabilize the timing. When Base Timing is set to ON, it should always read 10 deg, regardless of RPM.

You can drive the car with idle control OFF.

[67chevy]

What happens if its set at idle ( 900 RPM )

[J.Wagner]

it will still show 10 deg, but it may move around a little due to no load on the engine. This will depend on idle quality, if you have a cam with a choppy idle, the timing will move around more.