Decided to go for 50/50 water/meth injection to allow me to run more timing, and additionally to cool the inlet temps. Got the meth from a chemical distributor in Belfast.
Whilst recently whupping some lexus on the motorway - an IS-F - inlet temps went to over 55 degrees. I was expecting this as my setup is for drag use mostly.
I have started to fab up a reverse scoop for the underside of the boot where the intercooler is, but in the mean time, I went for an AEM water/meth injection kit.
To say the meth makes a difference is a massive understatement, I thought my knock detection was broken as I was able to add so much more timing. Inlet temps are super cool now, even on a long boost.
Few pics from my phone (apologies for quality, its an HTC HD2) of almost finished setup
You can see at the top right where I mounted the injector nozzle
(http://www.mark-chapman.com/uploads/wi1.jpg)
Tank, pump and some (for now) messy wiring in the boot. The long trailing wire is the serial hookup for the o2 sensor controller
(http://www.mark-chapman.com/uploads/wi2.jpg)
Close up of nozzle mounting position, excuse the writing on the pipe, was to remind myself of the thread I needed to tap it with!
(http://www.mark-chapman.com/uploads/wi3.jpg)
This is where I am mounting the controller. The long wire is for the LED thats on the dash that is now wired up.
(http://www.mark-chapman.com/uploads/wi4.jpg)
wow....55+c is pretty dam hot after your inter-cooler etc...
what sort of boost are you running at how / how much pressure on the wi pump ?
Ive seen a few people experimenting with wi hoping to stop ring gumming running veg oil.... cant deny it looks like it temporally fixes problems for some people.... but don;t really think of it as a long term fix.... more or a quick steam clean for already buggered rings...
up to 2.1 bar so far, and the water/meth gets injected at 10 bar pressure.
Makes a huge difference on a petrol motor - the water is to reduce knock and temps, the meth ups the effective octane of the petrol.
When you inject water doesnt it also expand in the cylinder to give a bit of steam power ?
Yes, its supposed to raise cylinder pressure as well
(http://literary.erictmarin.com/archives/Issue%2017/images/train.jpg)
When this meths kicks in, youre going to see some serious sh*t.