I had more wires coming out of my engine bay than i've ever seen on that
test along with exhaust "sniffers" in each tailpipe. We wanted to see
EVERYTHING that the engine was doing. I know the Dyno check was correct
since we went back with my truck after a few more "tweaks" and the A/F Ratio
was back down to 14.4-14.8:1.
12.0:1 - 13.0:1 is pretty much application dependant...but 12.5:1 is an
average.
- Bernd
-----Original Message-----
From: owner-dakota-truck@buffnet.net
Subject: RE: DML: Viper/Dakota Map Modifier
At 03:44 PM 11/16/00 US/Central, you wrote:
>14.7:1 is not a "Pinging" range
I have read a few efi articles from various media sources that says
the opposite. That's why I mentioned it in the previous post. As
for myself personally, I don't know.
>...from what i've seen on a Dyno with the A/F Meter hooked up (on three
Dakota's)
>we are hitting 15.5-15.7:1 in some cases...that in conjunction with the
40+ degrees
>of timing in before 3000rpm is a major factor in the pinging problem.
Just wondering how this works on the dyno. Do they use a wide band O2
sensor
in their setup? Our O2 sensors are narrow band and don't have the
resolution
to detect much either way beyond 14.7.
>Ideal for performance is 12.3-12.6:1 (12.5:1 being the norm for "Best
>Performance".)
This is the range that I've seen as well but I've also read 13.x:1
as well.
Bob. Burlington, Ont., Canada.
'97 Dakota CC, 5.2L, 4x2, 3.92 SG, auto., 4265 lb.
Dyno: 231.2 rwhp 340.0 lb-ft rw torque
PB: 14.737 @ 91.75 9.364 @ 72.95
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