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even or odd fire?
Posted: Thu Sep 29, 2011 11:08 pm
by Alxsmt
I dont know what makes an engine even or odd fire... I cant find it online, seems like it would be such a stupid basic and common knowledge question but there isnt any info on it..
is it what # cylinder fires first? thats my best guess..
trying to figure it out for the 3400, need to know for megasquirt
Re: even or odd fire?
Posted: Thu Sep 29, 2011 11:31 pm
by scd88ga
An even-fire engine is one in which the firing of each cylinder is separated from its predecessor by the same angular travel of the crankshaft. An odd-fire engine is one in which each cylinder fires at a different rotational spacing from its predecessor.
GM 60 degree V6's are even-fire.
In a standard 6-cylinder engine with inline, horizontally-opposed, or a 60 degree V layout, one cylinder fires every 120 degree of crankshaft rotation.
GM 90 degree V6's are odd-fire.
Re: even or odd fire?
Posted: Fri Sep 30, 2011 9:03 am
by Barry
Do you need a msq to get your car running? I have a msq for msI and msII for a 3500 with 28lb 43psi injectors being run at 55psi. I can email them to you
Re: even or odd fire?
Posted: Fri Sep 30, 2011 6:56 pm
by Alxsmt
well that kinda makes sense. thanks!
barry, that would be helpful! im having an issue with no rpm reading and im thinking its one of the settings. but I had it set to odd fire so that may be it.