srt8 afr too low

[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?

[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.

[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?

[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.

[69rrbruce]

I'm confused.........a AFR of 10 or 11: 1 would be rich not lean!

[Mike_Levy]

Right, thats why he had asked if he should pull fuel.