Air Fuel Ratio's

[Beasly B]

Just learned how to datalog with my lm1 do these numbers sound right? Up to about 4k they are high 12's to low 13's and after that up to 6k they are mid 12's I have my PMS now what could I do to make them better or are they okay?

 

[Daggar]

Sounds good to me for a N/A car. With your ATI, you should be between 12.1 and 12.5 when you're in boost.

 

[Grn92LX]

For my n/a combo I tuned it so it starts at a low 13 across and works its way to a upper 12 up top to 6700 rpm. Try pulling out -2% fuel @ 6000 rpm in high load and WOT.

When you do your blower, you want it in the 11's.

 

[Beasly B]

thanks sounds good, friday I ordered 42lbs injectors pro-m blow thru meter and the 3 bar map sensor that was close to 700 bucks hopefully I won't be naturally aspirated for long, really the only thing I have left is the procharger kit and I'm real close but don't want to be in a bind for money so maybe a few weeks I'll be tuning for boost with yall's help. thanks

 

[criticman]

I second Grn92LX - blown applications need to be in the 11's from any tuning piece I have read. That is what I will be aiming for this week.

 

[Daggar]

It's not necessary to run that rich with just 9 lbs and an intercooler.

 

[criticman]

Ah yes, forgot about the intercooler. 12's would be fine then.

 

[Beasly B]

also now that I really look at my sessions the rpms go up to about 8800 rpms, is my rpm adapter setup right? I only reved to about 6k tops, shouldn't the graph stop at 6k?

 

[Grn92LX]

The rpm converters are pieces of sh it. Mine does the same thing, it isn't perfect when I load it to my computer. Its ok enough to tune though.

And shoot for 11's for your blower a/f

 

[Beasly B]

thanks man, wanted to make sure it was setup right, wasn't sure. Wonder why it does this? Does everyone have this trouble?

 

[Daggar]

If you set up the converter with an inductive pickup, it will work fine. You need not purchase the one from Innovate. All you need is aabout a 12 inch length of 8 or 10 G solid copper wire. Wrap it around your coil wire and run your rpm converter to one end of it. Works great, no muss, no fuss. The RPM converter on the LM-1 is on the sensitive side. This poor man's inductive pickup works great.

 

[Beasly B]

so just do away with the wire from the tach signal on my msd box and wrap the solid wire around the coil wire and hook it up the rpm screw on the adapter and that will be more accurate?

 

[Daggar]

Yep... that's pretty much the cruz of it. Don't forget to tune the RPM converter, if you haven't already. The audio card method seems to work the best.