My mechanical preturbo water injection

[dudemaaan]

Originally Posted by drewrey2004

Actually I purchased a replacement cap that flows 1608cc at twenty psi and I was thinking running meth all the way or at least 50/50. Also I'm not experiencing any breakup but it does feel very sluggish up top as it drags to hit 8000 rpm. I just need to find a way to get meth around here or use washer fluid.

I will try it with the coolingmist jet in front first and see how works. I was going through some of the logs and noticed that on a hot day the IAT was at 145 degF cruising and at 10 psi would go up 10-15 degrees. At 15-16 it was reaching 175-185 degrees. Also I have an activation LED that lights up when the Coolingmist pump activates and noticed on some of my runs that it wouldn't light. It's the reason why I'm leaning towards the mechanical setup. The Coolingmist system is inconsistent from what I noticed and might be the reason why I'm seeing high temps.

And wanted to throw it out there and see if anyone has tried using Isopropyl. I noticed it's really cool to touch and read somewhere they used this type of alcohol testing AI. It's cheap and can mix it up using water.

The density of the air at those temperatures is very low which means you make a lot less power. The same thing happens when you run a turbo past it's efficiency range. You make more heat then power. I'm not surprised that it feels sluggish. Falling off on top could also be caused by intake and exhaust restrictions. (turbine housing too small, exhaust too small, restrictive plumbing etc) An ignition system won't help unless you're not igniting the mixture completely, that doesn't sound like it's your issue. Once you try to burn 1600cc that may change. The alcohol will help with that though. You should have no problems with intake temps if running alcohol too.

Isopropyl can be used, the flash point isnt as low as methanol so it doesn't cool as much per volume, it also has a higher BTU then methanol so you will need to pull more fuel from the fuel maps compared to injecting the same amount of methanol. So if you're nozzle is a set size methanol will have more cooling ability while not effecting the fuel maps as much. If you can find methanol it's a better option and should cost less to run.

Also that 1600 cc nozzle will be using a lot of whatever you inject. You will want a fairly large tank to keep from needing to fill it all the time. Roughly you will be using about 1 gallon of water/alcohol every 2 and a half minutes of full boost. So 2 gallons every 5 minutes. You will want a constant supply of alcohol, you might look into ordering a big drum of it to save money.