just got my car back here is the dyno sheet. tell me what you guys think. is the a/f safe? thanks

 

It leans out a tad getting to redline and curves a a bit jumpy maybe needs a bit better tuning to smooth it out.

 

The last run is pushing it. How much boost are you running? Are you using the "Greddy" reflash.

 

I wouldnt be revving past 6500 until you address a fuel system upgrade.

Can you refresh our memory on the setup you are running?

 

i beleive he has a ECU pulling out timing... if its running stock timing then its definatly a little lean but im almost sure he is pulling out timing.

 

It seems like the a/f is climbing more and more. Do you guys use stock fpr's with the greddy kits? Or does it come with an adjustable one?

 

Stock, some have installed an adjustable one when installing the return system.

 

Sorry if this is a goofy question, but isn't 12.5 about where the a/f should be?

 

12.0 or less on a stock motor, or even a built motor for that matter.

 

the setup im using is greddy tt, aam fuelsystemw/ walbro255, kinetix testpipes, injen exhaust, aam ecu reflash. i have the fuel system upgrade so i dont understand what you mean?

 

12.5 is said to be ideal for max power for FI but that is purely academic. In the real world, the engine rarely is under the most ideal conditions as far as temperture and consistent octane fuel.

 

yes i have some timing pulled out via aam ecu reflash about 6 degrees. yeah cat call me anytime so i can give you a ride.

 

What I think is happening is that you have run into max duty cycle for your injectors...12.5 is as Enron Exec has stated "purely academic" is infact one of those things I would consider as a guide line not a rule.....For example, Xsmallpaulx is probubly running 91-92 octane fuel and taking up to 6 degrees of timing out of his motor (when the timing comes out has not bin stated) then as the fuel pump startes to increase it pressure to increase flow it runs into a road block....This blockage is the amount of fuel a injector can move before it is just spraying fuel all the time this is the injector duty cycle. There is then a lean condition that is created by there not being enough fuel supply for the amount of air in the cylinders. What you realy need to know along with the A/F ratio is the exhaust gas temp....This will tell you if you are running lean or just about right....I use both when tuning a engine....

 

Here is my AF curve, a lot smoother. This is without the fuel return system which is going on hopefully within a week. I am pulling timing based on boost 1/2 degree per pound.

 

thanks guys. any more info? i think im going to take my car in to tune it again in 2 weeks. any suggestions on what i should tell the tuner?