Need help with WB calculation.

[Redline Motorsports]

I was fooling around with the WB on my dyno tonight and figured out that the Autronics WB puts out two voltage signals. One is 0-5 and the other is 0-1. The 0-5 is currently being sent to the dyno which it displays on the screen. I tried tapping off of it to send it to FS but always had issue with both reading at the same time. I am starting to think it was a ground issue....anyway I thought that maybe if I used the 0-1 for FS it would be a dedicated voltage that wouldn't be shared.

Tonight I recorded some voltage output vs. AFR to try and figure out the formula that will be needed for FS to convert it to AFR.

All the current calcs are based upon 0-5 and not 0-1. I have been playing with Excel and can't seem to figure the constant needed. These are some of the values I came up with;

11.0:1=.049 volts
12.5:1=.125 volts
12.8:1=.140 volts
13.0:1=.150 volts
15.0:1=.252 volts
20.0:1=.505 volts
30.0:1=1.00 volts

these numbers are pretty close as I was trying to watch the volt meter and WB display at the same time. I know the answer is something simple but I am too fried to process it! Any help would be appreciated!

Thanks

Howard

[Redline Motorsports]

I think I figured it out!

Its ({EXT.1}*20)+10

Boy I'm glad I got myself. Thanks.....

HT

[TAQuickness]

it only took you 20 minutes too!

[Redline Motorsports]

Yeah and I don't have a flux capacitor!

[joecar]

Howard, good job. :cheers:

[TAQuickness]

Yeah and I don't have a flux capacitor!

ahhh.. The flux capacitor is mostly for bling (pretty lights). The RCPD's are what really get things going :D

[Redline Motorsports]

Not only did I get it figured out but I got it working with the 0-5 volts split off the dyno!:rockon:

Its balls on the money using the Autronics PID. My WB reads to .01 an d the FS would switch to the next tenth once the WB crossed over .05.

I have no idea why this was such a struggle before... must be the V2!:master:

At least it was a good exercise in the volts vs. AFR!

Howard