[Chief Orman]

To those of you running water meth (and who still have their emissions system intact), have you noticed any change in the frequency of your regens? I have noticed that my regens have gone from one every ~220 miles to every ~190 miles. Everything I read led me to believe that installing a water meth system would result in fewer regens and longer intervals between the regens. Then again, I was also led to believe that EGTs would drop based on the manufacturer's website. My EGTs have definitely increased even when I am running a 50/50 mix. I know that is not news to the more knowledgeable folks on the site, but it was a surprise to me.

[DWR]

Originally Posted by Chief Orman

To those of you running water meth (and who still have their emissions system intact), have you noticed any change in the frequency of your regens? I have noticed that my regens have gone from one every ~220 miles to every ~190 miles. Everything I read led me to believe that installing a water meth system would result in fewer regens and longer intervals between the regens. Then again, I was also led to believe that EGTs would drop based on the manufacturer's website. My EGTs have definitely increased even when I am running a 50/50 mix. I know that is not news to the more knowledgeable folks on the site, but it was a surprise to me.

So now you know not to believe everything that is on the internet.
Oops, just painted myself into a corner.

The answer is - here it comes - it depends. You are correct, lots of studies show a decrease in particulate with the introduction of methanol. However, you probably won't find a single study with the AFRs we operate at. At lower AFRs, methanol will increase smoking, just not in the same proportion as diesel.

[Persian Whisperjet]

Originally Posted by DWR

So now you know not to believe everything that is on the internet.
Oops, just painted myself into a corner.

Awesome.

[Hoooper]

Havent noticed a difference in regen frequency on mine, but I dont keep all that much track. Its a lot less frequent than every 190 miles though.

[Mark M]

How do you monitor regen frequency? Is it by watching pre and post dpf temps? Or something else?

[Chief Orman]

Originally Posted by Mark M

How do you monitor regen frequency? Is it by watching pre and post dpf temps? Or something else?

Carly regen status function

[Chief Orman]

Originally Posted by DWR

So now you know not to believe everything that is on the internet.
Oops, just painted myself into a corner.

The answer is - here it comes - it depends. You are correct, lots of studies show a decrease in particulate with the introduction of methanol. However, you probably won't find a single study with the AFRs we operate at. At lower AFRs, methanol will increase smoking, just not in the same proportion as diesel.

As always an education. My AFRs are low but I don't notice a lot of smoking. In fact, I am amazed by the lack of it but I suppose that is a testament to the DPF.

[DWR]

Originally Posted by Chief Orman

My AFRs are low but I don't notice a lot of smoking ... I suppose that is a testament to the DPF.

Hit the nail on the head.

[Mark M]

Originally Posted by Chief Orman

Carly regen status function

I take it this is a android function? I haven't located it on my iOS Carly app.

[Chief Orman]

Originally Posted by Mark M

I take it this is a android function? I haven't located it on my iOS Carly app.

I switched to Android because of this issue. If you're diehard Apple fan, just buy a cheap Android phone and don't activate it.

[Chief Orman]

Originally Posted by DWR

So now you know not to believe everything that is on the internet.
Oops, just painted myself into a corner.

The answer is - here it comes - it depends. You are correct, lots of studies show a decrease in particulate with the introduction of methanol. However, you probably won't find a single study with the AFRs we operate at. At lower AFRs, methanol will increase smoking, just not in the same proportion as diesel.

AFRs get as low as 12.5 under full acceleration with a 50/50 mix.

[DWR]

Originally Posted by Chief Orman

AFRs get as low as 12.5 under full acceleration with a 50/50 mix.

Here's another piece of 'education'.
At elevated pressures WB02 sensors over report either side of stoichiometric AFR. The DDE has compensation, but probably not enough with higher horspower and backpressure.

Still, 12.5 is very low. I can tell you that you are most likely loosing power at that level. Guessing the H20/meth is too high in the lower rpms - just a guess, based on the info you have shared.

[Chief Orman]

Originally Posted by DWR

Here's another piece of 'education'.
At elevated pressures WB02 sensors over report either side of stoichiometric AFR. The DDE has compensation, but probably not enough with higher horspower and backpressure.

Still, 12.5 is very low. I can tell you that you are most likely loosing power at that level. Guessing the H20/meth is too high in the lower rpms - just a guess, based on the info you have shared.

That makes sense to me based on the article you shared addressing AFRs. Given the boost controlled nature of my system and your comments, I think I should take my trigger point from 14 psi to 18 psi to help ensure that I am injecting at higher RPMs.