Thanks for the tip. I have wasted a few gauges because I didn't know such things even existed (outside my head)

 

Over what?

If I was thin skinned I wouldn't last long as an administrator.

I too appreciate you taking time (on the weekend, no less) to give tech support in front of an audience. Good to have you here.

 

Begle gets grumpy all the time!

 

WOW!! This threads been busy!

FWIW to all ~

I'm planning on creating a General Water/Methanol Install thread based on my install and that info gleaned from other users of W/M in these forums. I'm hoping to have it on a level with the Piston Lift Pump Install thread.

. . .. Soon to be posted.

 

Hey Wanna, BC847, & Loch,

I changed the pump up to 95% duty cycle (from 80%) and am still running the Tune on "10". My engine gets much louder and high-pitched when the W/M hits. The increase in boost and power is pretty incredible. Do you guys also notice your engine gets really loud and high-pitched when the W/M starts ramping up? By "loud and high-pitched", I mean in a good way...I think.

 

David from CM,

Do you have a ballpark estimate on what psi this system is pushing with dual 16gph nozzles at 25% duty cycle (when it first kicks in with default settings)?

I changed my pump minimum duty cycle to 40% and it seemed to make the system perform better. When I set it to kick in at 15psi there is no noticeable effect from about 15psi - 17psi, then it seems to really ignite and the boost skyrockets. I'm thinking the reason for that "flat spot" is there might not be enough system pressure at 40% duty cycle and 15-17psi to properly atomize the W/M.

I think starting the pump at 25% duty cycle is too low for turbo diesels, probably due to the extra nozzle and higher boost levels we typically run. It might be good to offer the diesel version with a 40% minimum default (or recommend it be changed to 40% if possible). With dual large nozzles and 15-20psi of starting boost, I don't think the nozzles are able to atomize when set to kick-in at 25%.



BC847,

I would definitely think about hooking your controller to a laptop and upping the default minimum pump setting to 40% just to be sure you're atomizing the W/M nicely.

 

I certainly agree that you would get better performance in your case to bump the duty cycle higher. Im certain I mentioned that to you in the past. I dont know what psi 25 PCT duty cycle with two large nozzles, but along with the boost in your system the checkvalve requires 22 lbs to open...changing the duty cycle to 40 % will make a significant difference in the initial spray.

Also, if look back many posts ago I told you to boost your max duty cycle from that 70% to 100%. I made an error when I told you to max it at 70%. the 70% would be in the case that you have ONE 16 GPH nozzle. With 2 nozzles you can have it go to 100% no problem.

We make the tool available for you to configure it to your vehicle. When we designed the controller the idea behind it was to make it configurable for any vehicle. By using the software (when necessary) you can do that.

David

 

Yup, messing in the software's next.

It is pretty sweet that with the variable controller there's no "Bang" when it hits as those with the Hobbs switch describe. My drive-train appreciates that.

I've got to confess, no matter where I have the spray come on, as jrussell points out, the boost jumps very fast to 35psig (MBC limited). I was thinking earlier today while driving around, This thing's ether purring at zero to eight pounds boost @ 700* to 800*, or is WFO at 35psig boost and 1300*. No in between!
With the start point set low, the truck jumps right on up to highway speed. I've lost all linearity of the throttle as I knew it before. It's frigging KEWL!

The sound?
With the BHM, there's nothing but the engine. I guess the intake sound is unique compared to most with the Stock-pot cold air box and its wide opening through the radiator bulkhead thing. And that's muted with my running the silencer ring. Still though it competes with the sound of the engine itself. I can't think of how to describe that. It's definitely not a sound of a struggling engine.

That software's awesome! I gotta find a serial cable in this heap of a computer room. Twenty rig Folding@Home farm to my right. You'd think I could find such a cable . . . .

 

I think that's due to the driver and not the truck!

I know what you mean though...I'm the same way. I was actually able to use the 15psi-35psi "zone" last time I towed with it. Turning the sysem off while pulling up a hill and then turning it back on really shows the difference it makes. The only way I can describe it is like a shot of Nitrous when you turn it off and on while under a lot of boost. Oh, and this was BEFORE I installed the second nozzle!

I guess the sound has a lot to do with the turbo spooling and the boost jumping from 15psi to 35+psi so quickly. The "high-pitched" sound I was describing must be the turbo. It's hard to tell as the whole engine gets pretty loud when the spray hits. I absolutely love it!

Do you guys believe me about the level of customer service that David and Coolingmist provides? You can tell they really stand behind their product, even if the customer has some odd issues that others don't. How many other companies would have been here all day on Sunday answering our questions and concerns? Thanks David!

 

How much of the performance gain is due to the alcohol? Has anyone tried comparing straight H2O to a 50-50? If this is redundant, I apologize...

Mark

 

Hi Mark,

I've tried ~12% meth, 25% meth, and 45% meth. The boost goes higher for every bit of meth that you ad to the mix. It definitely makes a BIG performance difference running 45-50% meth than running 25% or less. I haven't really noticed a difference in max EGT's between any of the mixes (I haven't tested that thoroughly yet though).

Best Regards,

Justin

 

https://www.dieseltruckresource.com/...5&page=2&pp=15

Check out this thread, specifically post #27, it really explains alot of theory about how much meth you would want to run on a specific truck.

Good luck!!

 

There is a lot of misinformation in that thread (including post #27), read my post #34 for my take on water/meth percentages.

 

I just came back form there and was going to make the coment of what you said .....maybe you should transform your #34 to here!.........Na I guess that thay wouldn't understand, with out reading #27

 

Yeah I saw that peeing contest, put in a constructive .02 and got out.

Dave, that final paragraph is an outstanding example of a simple, to the point, and VERY accurate answer. Hat's off to ya.