Question about WOT table in $8D bin

[timsiford at hushmail.com]

At 5600rpms and 80deg C I am running ....

8.2   Modification to the WOT Change to AFR vs RPMS
22.7 Modification to the WOT Change to AFR vs Coolant

Using your formula that yields ....
(1 - ((8.2 + 22.7)/100)) * 14.7 = 10.16

Heh heh ... maybe that's why I get away with running 42deg of Timing at 
those RPMs.  The AFR and the timing SOUNDS high but the car likes it.  I 
am not complaining since I have run 12.2 at 112mph NA with the stock 350 bottom 
end.

Tim

At Sun, 12 Nov 2000 17:51:35 -0800, romans at starstream.net (Romans, Mark) 
wrote:

>
>
>Hi Edmond:  I will try and help you.
>This info applied to 165 ecm, using 87-88 code for F&Y body.  It "may" 
>=
>be the same for your app, if not it will
>hopefully send you in the right direction. This info is being carefully 
>=
>typed just like it says in my MT manual.
>
>"WOTR
>This table is percent change to Air Fuel Ratio used at or near wide 
>open =
>throttle conditions Vs. RPM.  AFR is based
>on 14.7:1.  The values from WOTC and WOTR are summed to arrive at the 
>=
>WOT Air Fuel Ratio.
>
>Approximate WOT air fuel ratios may be calculated using the method shown 
>=
>below.
>
>For the selected RPM, suppose the percent change to Air Fuel Ratio from 
>=
>the WOTR table is = -5.1 and the percent change
>to Air Fuel Ratio from the WOTC table at the selected coolant temp is 
>=
>= 22.7, then the approximate AFR would be:
>
>1 - (-5.1+22.7)/100 * 14.7 = 12.1:1 AFR"
>
>If you have diacom it will show you the "Commanded" AFR.  Keep in mind 
>=
>that this is an estimate.
>
>I am running a commanded AFR of 12.0:1 and I am sure it is leaner than 
>=
>that because if I drop the AFR a bit leaner the car falls down
>and detonates, but 12.0:1 would really be too rich.
>
>HTH's
>
>Mark
>  ----- Original Message ----- 
>  From: Edmond 
>  To: gmecm at diy-efi.org 
>  Sent: Sunday, November 12, 2000 4:24 PM
>  Subject: Re: Question about WOT table in $8D bin
>
>
>  Nobody has any idea about this  ? :/
>    ----- Original Message ----- 
>    From: NRG 
>    To: gmecm at diy-efi.org 
>    Sent: Saturday, November 11, 2000 8:30 PM
>    Subject: Question about WOT table in $8D bin
>
>
>    Hey guys. I got a quick question. What does the "WOT change to =
>Air/Fuel ratio compared to RPM" table in TunerCat for the $8D definition 
>=
>file ? I mean it's pretty self explanatory but the numbers arent. Mine 
>=
>has both positive and negative numbers. What is the relation between 
>=
>these numbers and the actual ratio ?=20
>
>