Thread: How to hook up the A/D inputs on the DHP Powertuner?

How to hook up the A/D inputs on the DHP Powertuner?

I have an Innovate LC1 wideband and i'd like to hook up to my DHP POwertuner so I can scan the readings. Can anyone help me with this? Thanks...

there are four ports. One is a ground and the other three are positives (1,2,3 which would be the 1,2,3 AD inputs under the gauges selection. The only thing you will need to figure out is how to make the powrtuner show the input as an afr. It will show up as a voltage just like the O2 sensor. Here is the info I used to make my wideband show up as an afr. I got it from the powrtuner site.


Right click on the gauge showing your A/F voltage and add a formula to what is there. Basically the span of your wideband divided by 5 plus the lowest reading your wideband can go. eg. mine can read 7.35 to 22.39 AFR. (22.39-7.35)gives span of 15.04. 15.04/5=3.008 so every 1 volt change represents 3.008AFR. Add on the 7.35 bias(that's my zero volt AFR) and you're there. There will be some numbers there already like N51/something or other. I don't remember what exactly. Don't change that, just add the formula to the right in the proper algebraic order. N51/whatever*3.008+7.35 in my case. At zero volts out you get (0 * 3.008) + 7.35 = AFR of 7.35. At 5 volts out you'd get (5 * 3.008) + 7.35 = 22.39 AFR or full scale. "()" aren't needed when you enter the formula. If you need to tweek it for voltage losses and the like fudge the multiplier as needed. If I tell my WB to output 5 volts and check it with my fluke it's 4.9 something so I have to make allowances.

I appreciate the help but... i'm lost. LOL. I may have to go to collage to figure out how to hook up my wideband! WOW.

Can you by chance repect everything you said in about a 3rd grade level? Help a brotha out! :-)

Next question, when I hook up the input (ground and power wire from the AF gauge) how do i set it up to show in the scanner? Or as soon as hook up the gauge it pops up?

Ok I will just start from scratch and do the best I can. I find it hard to explain things over the internet. Do you have msn by chance, might be easier to explain on there were we can talk back and forth.

BTW don't worry we will get it figured out

Its not your fault dude. When anyone tries to explain anything to me about the powertuner I feel like i'm trying to learn chinese. I just flat ass don't get it. Thats why I have Overkill do my tuning.

I don't have MSN, I do have AIM though...

Ok I added you on AOL, but you are not on

Ok I will try this again, so here it goes.

On the little green plug on the side of the PT interface there are four little spots to put wires in. Each little hole has a screw that you turn down onto the wire to hold it in place. The four slots are marked G(ground), 2, 3. If you go into the powrtuner on your computer and open the scanner you will see you can select certain gauges. I believe there is engine, trans, accessories, and then A/D inputs. If you click on the A/D inputs so it drops down you will see A/D 1 though 3. Now which slot (on the little green plug in) you put your wires in coming from your w/b will determine which A/D input you want to use to monitor your w/b. Now once you have the right A/D input gauge opened up it will show a voltage reading from your w/b. Right click the gauge, there will be a couple options. I can't remember what they are anymore. Pick the one that takes you to a window that has a line with the numbers N51 typed in it. I am not 100% sure those are the same numbers you will see but there will be an "N" for sure. If you got this far now you can read the following directions.

Right click on the gauge showing your A/F voltage and add a formula to what is there. Basically the span of your wideband divided by 5 plus the lowest reading your wideband can go. eg. mine can read 7.35 to 22.39 AFR. (22.39-7.35)gives span of 15.04. 15.04/5=3.008 so every 1 volt change represents 3.008AFR. Add on the 7.35 bias(that's my zero volt AFR) and you're there. There will be some numbers there already like N51/something or other. I don't remember what exactly. Don't change that, just add the formula to the right in the proper algebraic order. in my case. At zero volts out you get (0 * 3.008) + 7.35 = AFR of 7.35. At 5 volts out you'd get (5 * 3.008) + 7.35 = 22.39 AFR or full scale. "()" aren't needed when you enter the formula. If you need to tweek it for voltage losses and the like fudge the multiplier as needed. If I tell my WB to output 5 volts and check it with my fluke it's 4.9 something so I have to make allowances.


Now you need to know the range of your wideband. In the directions it was 7.35 afr to 22.39 afr. Take the higher AFR and subtract the lower one from it. Whatever number you come up with will be the span of your wideband. Now take the span of your wideband and divide it by 5. Now you can enter the numbers in that line behind the N51 (or whatever is there, but leave it all there). After the N(whatever) enter this equation without the ()'s. (*(the number you came up with from dividing)+(the lowest afr you w/b will read). In the directions he came up with this N51/whatever*3.008+7.35. I hope that made sense. If not maybe the next time I have some free time I will get you some screen shots. Let me know if that helped or not. I know it is kind of a mess, but it was the best I could do at 4am.

thanks again for the help. Sorry I missed your PM, I just got it today!!! Anyway, i guess i'll mess with it again here soon...

Did any of what I said make sense? If not see how far you get and let me know and I will try to help you from there.