Quote Originally Posted by WASyL View Post
Open loop is the best way to go if You don't use catalic convetrer. CL is only to protect cat conv not to melt and work properly, all emission related. I run LT1 (92 and 95) OL, with ignition and VE finetuned (i'm MAF delete guy) i was able to get more MPG and power at the same time. CL is always targeting 14.7 AFR (except WOT situation) so you won't get bes overall performance and that limits MPG savings.

best regards
Thanks for the input. So what about if there is a cat in the picture? Even though I could get away without in my part of WA state, I did decide to go with one - it’s a straight flow aftermarket type, low back pressure. Will running in OL fry my cat?