I've done some researching and I'm going hook up to a Lambda wideband O2 sensor (to be installed in downpipe, still have main cat). From what I've read I should be tuning to get some where around 11.5-11.1:1 A/F ratio (Is this correct or am I ...wrong?) Also my duty cycles should be around 85%, right? What else should I be looking for reliability and performance wise?
I have a switch that I can change between 3 (boost/fuel/timing) settings, (If any one is familiar with the purple box) I use the 3rd setting for ‘valet protection’ and for the 1st setting I’m looking to get good (better) gas mileage (say for the interstate) and stay close to the stock performance (I will be running 10psi on primary and 11psi on secondary). Finally the 2nd setting, (I want my passenger to be looking for something to hold on to) I will be running 12 and 13psi (yes I still have the stock IC, and I have ‘will power’ and don’t run the 2nd setting often (I don’t have the room here in Atlanta to open her up that much)…I’m just as paranoid as the next guy, about popping the motor). This is my first time going to a Dyno, so if anyone has advice I’d love to hear it. Sorry so freakin’ long. (and yes I’ve been to Wade’s site, very helpful be the way; Thanks Wade)

 

Well, the best place to put the O2 sensor would be at the bottom of the DP right before the main cat (weld in a new bung & plug it with a bolt when your done).

That A/F should be fine, but your inj. duty cycles should be 85% OR LOWER! Don't sit there in richen it up for a desired % just to lean it back down for a desired A/F...

 

Thanks

 

yes, i don't think there is any ideal injector duty. its just that over 85% can wear them out faster and the closer you get to 100% the greater chance you have of shorting the engine on fuel...
good luck on the dyno! with intake/dp/exh/ecu/12lbs you should be good for 270-280rwhp.

 

Thanks man, I don't know what to expect but those #'s sound great! I'll do my best to get the sheets posted tomorrow.

 

i had drop in k&n, dp, high flo cat, same exhaust, ported engine and got 270 before the clutch let go.
an extra 50 or so horses is goot for .5-.8s off the 1/4 time. out of curiousity, what shop are you going to?

 

Dyno-Lab in Marietta, GA