[gear jammer 91"]

I'm just curios what mixture percentage works the best for cooling? I have a diesel and my EGT's can get above 1400. I'm runnin a 15% methanol 85% water mix at the moment and that helps, but not much. I'm also runnin two injectors, one is 14gph one is 10gph. I need more cooling and I don't know what route to take, more gph or different mixture. Any help would be appreciated.

[pacemkr86]

on our 12v.. we use 100% water

[Terry Syd]

I've seen discussions that 12.5% to 15% gives the best overall cooling. Apparently around 13% is the cross-over line between water slowing down the combustion and methanol increasing the speed of combustion. So if you want to increase the speed of combustion you would use more than 13% methanol in the blend. If you want to slow it down, use less than 13%.

That takes care of the blend part, but there is also the amount of flow you are using. If you are already using 15%, then perhaps you need to increase the flow rate to try and wash some heat away.

I suspect that there are multiple factors involved, but that is the rule of thumb I am using and it seems to be working. I'm running some advanced timing with my biodiesel and the speed of combustion during higher boost pressures is a bit too fast. I am using a 10% blend and it seems to work well with the biodiesel. I use an M2 pre-turbo on my 2.4 TD that works well for most driving. I also have a post-turbo M2 that I can engage through a solenoid when I want to add some more flow on long uphill climbs.

Perhaps having a secondary nozzle that you can selectively engage for certain conditions may work for you.

[Dust]

I think it's also necessary to note that with increased water, nozzle must be decreased. I wish I could run all water when the kit gets here, but I have a feeling that even with the Progressive Controller the M1 with water will be too much for the car.