Thread: Timing Curve
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Old 05-23-2014, 07:55 AM
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wolf k wolf k is offline
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Join Date: Jul 2010
Location: Augusta, MO
Cobra Make, Engine: Sold ERA FIA 2139, 331 Weber IDF
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Hi Paul,
I also can confirm that webers like a lot of initial timing advance. At least on a small block, I am at 22 deg at idle, 36 deg at 2700 rpm. No starting issues, in fact it starts immediately, and settles to a nice idle almost as quickly as an injected motor. I spent a lot of time with different curves and initial settings, and this is where my engine seems to perform best. Engine has 10.5 compression, mild cam.
I have always wondered why webers on IR manifold need a lot of initial timing. Perhaps they do not atomize fuel as well as a single carb on a manifold at low engine speeds?
When you say your starter has a hard time at 14 deg, do mean with your current weber set up, or your old 4bbl set up? And we are also just talking about mechanical only adv. distributor, not vacuum correct?
Wolfgang
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