even or odd fire?

If there isn't a place for your question then put it here.
Post Reply
Alxsmt
Registered User
Posts: 302
Joined: Sat Jun 11, 2011 12:08 am
Location: Oregon
Contact:

even or odd fire?

Post 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
Image
88 Beretta CL - your average grandma car.. Ls1 swap in progress
77 Celica - needs an engine swap
96 Geo - 1.0L, Cam, 3 angle, magnaflow, Koni, coilovers.
86 Subi - Supercharged @7psi
User avatar
scd88ga
Registered User
Posts: 1828
Joined: Mon Jun 28, 2010 9:02 pm
Location: Wisconsin Rapids, Wisconsin
Contact:

Re: even or odd fire?

Post 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.
'94 Quad 4 H.O. 5 speed Z26, Red & Rare! 1 of 896 Quad Z26's and of those it's 1 of 167 red paint/gray interior!
Need A Quality Used Part? Contact me at Posihead Auto Parts!
https://www.facebook.com/pages/Posihead ... 3779691724
User avatar
Barry
Global Moderator
Posts: 1871
Joined: Fri Feb 29, 2008 8:11 pm
Location: Hatfield Pa

Re: even or odd fire?

Post 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
Alxsmt
Registered User
Posts: 302
Joined: Sat Jun 11, 2011 12:08 am
Location: Oregon
Contact:

Re: even or odd fire?

Post 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.
Image
88 Beretta CL - your average grandma car.. Ls1 swap in progress
77 Celica - needs an engine swap
96 Geo - 1.0L, Cam, 3 angle, magnaflow, Koni, coilovers.
86 Subi - Supercharged @7psi
Post Reply