[Diy_efi] Ignition Advance

[Tim Marsteiner]

A richer mixture burns faster requiring less advance.
Correct?

Anyone care to estimate how much? 

This is on an air cooled 1386 cc normally aspirated
V-Twin with a 3.66" bore.

Let's say I was running 14.7:1 (closed loop) at 40%
engine load with 35 degrees of advance and let's
assume the onset of knock occurred at 40 degrees. 

If I switch to an open loop map with an A/F of 13.7:1.
How much should timing be retarded as a starting point
for tuning?

I built up a little microphone amp circuit and glued a
small condenser mic to a spring clamp. I plan on
clamping it to the fin closest to the bottom of the
piston skirt at TDC. Anybody care to describe what the
onset of knock will sound like. 

Any other guidance is appreciated.

Thanks,
Tim


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - now with 250MB free storage. Learn more.
http://info.mail.yahoo.com/mail_250
_______________________________________________
diy_efi mailing list
diy_efi at diy-efi.org
http://lists.diy-efi.org/mailman/listinfo/diy_efi