Should I change FMU Disc from 8:1 to 6:1 I'm Running Rich??
 

I checked with Stillen and the part that comes on v2 2000+ are indeed the 8:1 disc. And I'm running pretty rich at this point even with the AFC tuned at 23+%. Fuel Pressue was at 34psi. Now it's idling at 40psi. And gas miles have sucked lately. I get like 250 sometimes on a full tank. I used to get 300+ easily. So I guess I should look at getting the 6:1 disc so I can lean it out a bit and then retuning my AFC?

I'm running the 6:1 disc on my V1 w/a 3.33" pulley and 1 step colder plugs. I STILL get horrible milage. My fp idle is 38-41psi. I guess the colder plugs and stock fpr is killing me. The V2 makes a little more boost per psi then the V1 depending on the pulley, so if your running a 3.33" I'm not sure what you should do. If your running the stock pulley, then by all means switch. I hit something like 65psi at WOT with my setup which is good.

I'm running on the 3.33" pulley

Do you have an a/f curve?

get an adjustalbe FMU
vortech : $280
cartech : $240?


here is my dyno, FYI
http://forums.maxima.org/showthread.php?threadid=197893

another 5th gen max has similar setup with AFC and his A/F ratio was exactly the same as mine before Kevin tuned the AFC. Kevin brought it back to a nice flat 12.5:1.

:nervous:

If I remember right my af was like 12.5:1+ when I dyno'd. And tuning the afc it came down to something like 11:5 or so.. They guy at the shop said I was still running way rich..

12.5 is fine. Why did they continue changing the a/f?

If they went 11.5, it's actually running richer now. 11.5 is not as way rich as you think. It may even give you more hp than 12.5.

I forgot to mention i'm running the Walbro HFP. Your not running the stock pump are you PCGURU?

Yeap.. I'm still running the stock pump...

Hmmmm.....you'd think you'd be running leaner if anything. Wtf? :confused:

He won't run lean since the stock pump + aux. pump can support the 2.87" pulley and still run rich (see [maxi-overdose]'s dyno). :kiss: