General Category > Quadrajet Carb Talk and Tips

Gm hei question

<< < (2/2)

lightning boy:
Have you tried one light and one heavier spring? Sometimes this is what is needed.

73ss:
I'm using a similar distributor, Original delco, but for BBC. I'm using one stock heavy spring and one medium aftermarket spring. Advance starts at 1100 RPM and all in at 2800~2900 rpm. Original GM 106 weights, 406 center cam. I'm getting 21 degrees total mechanical advance.

Anyone know where to find the plastic seal & felt washer located under the pick-up coil?

Cliff Ruggles:
I've had ZERO luck in long term service with aftermarket springs.  They are poorly made and get "soft" over time.  The heavier wired diameter factory springs will hold their tension for at least 100 years if they don't get rusty.

You can "manipulate" the spark curve with the heavier springs by simply opening up the "eyes" in the ends of them.  Quite often I'll leave one side stock and open up the other one to allow the curve to come in a little quicker but still not add anything at idle speed......

lightning boy:
that's a great idea. I'll have to try that. thanks for the tip Cliff!

Navigation

[0] Message Index

[*] Previous page