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srt8 afr too low
Posted: Wed Sep 05, 2012 12:44 pm
by jaltb4k
hi folks,ive got a 2006 charger srt8 with cam heads etc.....my question is my afr ratio under wot is 10.0 to 11.0. would you guys recommend me pull fuel or add more timing to get the afr correct?
Re: srt8 afr too low
Posted: Wed Sep 05, 2012 2:27 pm
by Mike_Levy
You need a CMR tune. You can't run major mods with the canned tunes. You're gonna grenade the motor. Not to mention you're probably out of injector.
Re: srt8 afr too low
Posted: Mon Oct 08, 2012 9:29 am
by jaltb4k
thank you for your advice,i took your advice and got mike at tuning superstore to do me one up. you mentioned i might be out of injector? what do you guys find the limit of the factory injectors to be?
Re: srt8 afr too low
Posted: Mon Oct 08, 2012 9:38 am
by Mike_Levy
It varies. Log the fuel injector pulsewidths and see what the duty cycle is. Anything over 80% is considered too high. My heads/cam Jeep SRT8 ran 105% with the stockers, so I'd guess yours has gotta be awfully close.
Re: srt8 afr too low
Posted: Tue Oct 30, 2012 8:37 pm
by 69rrbruce
I'm confused.........a AFR of 10 or 11: 1 would be rich not lean!
Re: srt8 afr too low
Posted: Tue Oct 30, 2012 9:09 pm
by Mike_Levy
Right, thats why he had asked if he should pull fuel.