I know it doesn't tell much but I have just so when I'm really on it I know it's RICH.

If that meter is displaying RICH is the car really running RICH or is there a possibility it's running a little LEANER then it should even though it's still all green (green=rich).

I'm putting in a 3.125 today, I have 6G spark plugs, and I have either the 6:1 or the 8:1 plate, I tried to measure it but didn't have a ruler. Vortech shipped some of the earlier V1's with 8:1 plates. Also, I'm positive I put the FMU back together properly but I still hate knowing the fact that I took it apart and if anything is slightly moved it could totally screw up my engine. Like that little tiny piece of thin metal that goes underneath the 4 allen screws, you can only really put it in right because otherwise you couldn't put the 4 allen screws back in, the size is perfect to fit, but anyways I still feel like I didn't do something right putting it back together, guess just scared hearing about all this 'how bad it is to be lean' stuff.

I also heard V1's make a little less boost then a V2. Thus, am I going ot be ok with 6:1, 6G, 3.125, and 93 octane gas? When I finish I'll closely make sure that it's not detonating and that at least the meter is reporting rich.

 

when i was on the dyno with the autometer a/f gauge, it was green while i was getting 14:1. you should get this: http://forums.maxima.org/showthread.php?threadid=155842

 

I don't know what 14:1 is supposed to be. Is that considered lean/rich? How does that number connect with the 6:1 or 8:1 plate?

 

14:1 is the air/fuel ratio, which is lean. see, the autometer doesn't tell you that, whereas the greddy does. generally speaking, your a/f ratio needs to be around 12:1(safer) if you're using forced induction, but i wouldn't go over 13:1. how does a/f correspond to FMU discs? well, you need to change the discs to achieve the correct a/f mixture that will net you the most hp w/o running overly lean.



subliminal message: you must get the greddy gauge to do this

 

Thanks for the reply!!!

To my knowledge the Autometer guage measures volts off of the exhaust's O2 sensor. The higher the voltage the richer it is. Therefore, the very first green LED will go off at a cerain voltage reading while the very last (richest) led will go off at a higher voltage. Thus, someone should be able to figure out what the ratio is at those different led levels right?

If I have it floored at redline with the stock pulley it usually is 3-4 LEDs away from the richest one. I don't know how it's going to look after 3.125, I'll probably be too scared to get on it because of fuel.

 

the problem is this: when you floor it, the autometer gauge lights up 2 or 3 leds at the same time, sometimes even 4. that's not much to work off of.

 

True that, what if you were to base it off the leanest bar, as long as all the bars are in the green what would the ratio be like?