How to connect an LC1 to be a wide and narrow o2

[Sp00ner]

Originally Posted by NoRemorse

but how does that help with tuning a specific part of open loop fuel? Sue I can see the entire thing, but I can't really correlate that with MAP/RPM/TPS

If I had both, I could refereance HPT, and say yea, at EXACTLY that point is where logworks is saying im a bit rish, or what not

Well, since you adjust A/F in a 'flat' way for performance, all you need to see is the general curve of the plot. If it's flat at 12.5 from tip in to redline, it's right.

You're thinking the fuel adjustments are a bit more complicated than they are. TPS is easy to corrolate, you don't get fuel enrichment until you do, and once you do, the line goes flat. MAF and MAP aren't critical, I can picture those two graphs in my sleep, they're always the same. Sure it would nice to see it, but then you should've bought the right interface for the job, ya know? Since WOT fuel tuning is done based on a calculation based on stoch as a constant, all you're doing is picking your A/F ratio over the RPM range, and adjusting it to suit. What's important, is what the A/F ratio is at a certain RPM, more than anything else.

[NoRemorse]

Originally Posted by Sp00ner

Well, since you adjust A/F in a 'flat' way for performance, all you need to see is the general curve of the plot. If it's flat at 12.5 from tip in to redline, it's right.

You're thinking the fuel adjustments are a bit more complicated than they are. TPS is easy to corrolate, you don't get fuel enrichment until you do, and once you do, the line goes flat. MAF and MAP aren't critical, I can picture those two graphs in my sleep, they're always the same. Sure it would nice to see it, but then you should've bought the right interface for the job, ya know? Since WOT fuel tuning is done based on a calculation based on stoch as a constant, all you're doing is picking your A/F ratio over the RPM range, and adjusting it to suit. What's important, is what the A/F ratio is at a certain RPM, more than anything else.

Exactly, and is that easy to do if you don't have it all on the same graph? I mean, if I see on logworks it's a tad lean, how can I correlate that to a certain RPM? If I had some sort of 'referance' on HPT, even if it wasn't very accureat, I could at least get an idea of what RPM to adjust for.

[Sp00ner]

Originally Posted by NoRemorse

Exactly, and is that easy to do if you don't have it all on the same graph? I mean, if I see on logworks it's a tad lean, how can I correlate that to a certain RPM? If I had some sort of 'referance' on HPT, even if it wasn't very accureat, I could at least get an idea of what RPM to adjust for.

Because you've choosen the slope of the fuel curve in HP Tuners. You should have a flat line for 99% of the WOT fuel curve. If you're dipping lean at some point, or rich at some point, there's something else going on. Again, I understand what you're going for, and 1/2 of that is picking the right tool for the job, you've got a metric socket and you need an SAE one, but you have to make due with what you have... I've been playing with the fuel curve for weeks now, it can be done just like I said. Or you can go through all the reprogramming of the LC1 and HPT to build your custom PID... that's another part of the issue...

[NoRemorse]

Originally Posted by Sp00ner

Because you've choosen the slope of the fuel curve in HP Tuners. You should have a flat line for 99% of the WOT fuel curve. If you're dipping lean at some point, or rich at some point, there's something else going on. Again, I understand what you're going for, and 1/2 of that is picking the right tool for the job, you've got a metric socket and you need an SAE one, but you have to make due with what you have... I've been playing with the fuel curve for weeks now, it can be done just like I said. Or you can go through all the reprogramming of the LC1 and HPT to build your custom PID... that's another part of the issue...

Well, I'll get the thing on there and see what happens. Hopefully it wil work out! (as I am sure it will, I'll make anything work, lol)

[nduchene]

Originally Posted by nduchene

How many wires do our stock o2 sensors have? I just ordered mine today and havent had a chance to look yet... just planning on a quick install, so I wanna be prepared beforehand...

I think I may have answered my own question... 2 wires - Purple and white, right? I think I need to run the 1v out from the LC-1 into the purple, correct?

Let me know. Thanks!

[NoRemorse]

Originally Posted by nduchene

I think I may have answered my own question... 2 wires - Purple and white, right? I think I need to run the 1v out from the LC-1 into the purple, correct?

Let me know. Thanks!

I beileve there are 4, but only 2 of them matter(maybe one, there is the signal wire and a ground), as the other 2 are for heating the sensor, which is not needed with the lc-1

[Sp00ner]

Yes, there's 4 of them, but none of mine were purple... I don't think... I removed the O2 sensor from the car and used the charts from HPT to match up what wire goes to what pin.

[nduchene]

Originally Posted by Sp00ner

Yes, there's 4 of them, but none of mine were purple... I don't think... I removed the O2 sensor from the car and used the charts from HPT to match up what wire goes to what pin.

So we have 12v power and ground running down there already??? That would be great.... I was planning on having to route some wiring somewhere.

[Sp00ner]

Do NOT use those for power.... especially not the ground. The ground MUST be grounded at the exact same spot as the PCM is, meaning you have to ground it to the HP box, or to the frame when not logging. You need ALL of your grounds to be in the same spot.

[NoRemorse]

Originally Posted by Sp00ner

Do NOT use those for power.... especially not the ground. The ground MUST be grounded at the exact same spot as the PCM is, meaning you have to ground it to the HP box, or to the frame when not logging. You need ALL of your grounds to be in the same spot.

The ground plays a vital role in non digital signals (well, in digtial as well, but not nearly the same) In fact the ground is EVERY bit as important as the signal wire