I tried searching for the exact specs but couldn't find it on this forum...
I hear many people speaking of "maxing out" the MAFS...I want to know at what voltage this ocurrs. Because I think I am maxing my MAFS out past 5000 RPM in first, second, third and fourth gear....
My Blitz R-VIT measures the airflow as 5.11 volts past 5000 RPM in all these gears.
If I am "maxing it out," what's the negative effects of this? By the way, I am only running 9 psi, and past 5000 RPM (when the MAFS is showing 5.11 volts), my boost is only around 7-8 psi MAX, and this is from a T3 super 60.
Also, I'm running a JWT ECU and some of the timing measurements I got don't seem to make sense...the timing is retarded more @ 5000 RPM than it is at 6000 RPM and 7000 RPM, in every gear...BUT, there is more boost at 5000 rpm than their is at 6000 rpm and 7000 rpm...but I didn't think the JWT retarded timing based on boost....
For those of you interested, here's some specs on the timing...
1st gear 4000 RPM (full boost), 13 BTDC1st gear 4500 RPM, 13 BTDC1st gear 5400 RPM, 15 BTDC1st gear 5850 RPM, 17 BTDC1st gear 6787 RPM, 17 BTDC
2nd gear 5000 RPM, 15 BTDC2nd gear 6000 RPM, 17 BTDC2nd gear 6762 RPM, 18 BTDC
3rd gear 5000 RPM, 14 BTDC3rd gear 6000 RPM, 17 BTDC3rd gear 6762 RPM, 18 BTDC
4th gear 5000 RPM, 12 BTDC4th gear 6000 RPM, 17 BTDC
Timing at idle is 20 BTDC.
I was going to advance it to 22 BTDC at idle because i've heard the timing for the JWT is real conservative, so everyone of those numbers would be advanced 2 degrees...is that safe or should I leave it at 20? I mean I could always go back to 20 if after advancing it to 22 it started to ping, but the engine has NEVER pinged to date.
Anyway, help is appreciated, thanks.
PS--Can anyone find a graph or chart showing o2 sensor voltage v. air/fuel ratio? The only one I can find is on
http://www.splitsec.com, but a few days ago I found an autometer graph showing 02 voltage v. a/f ratio and now I can't find it.