Here's my setup. 392 cu in Hemi, fully forged with 8.6:1 pistons. Paxton NOVI 1500 centrifical supercharger, currently running at 11.5 lbs of boost. Using a 4.5"X4.5"X9.5" with 2.5" i/o air/water intercooler that came with the kit, I felt it was too small and was actually creating a restriction. After contacting Terry at the Supercharger Store, he told me that I could eliminate the intercooler and just inject water for my cooling needs. He said that methenol shouldn't be needed with my compression and running 93 non-oxygenated fuel. We could always add it if needed. The guy's at Snow Performance agreed about removing the intercooler as well. I guess we'll see. What do you guy's think?

 

personally id rather have a larger intercooler and then meth/water if needed, but then again that would be for a street truck and not sure what your trucks duties will be

 

I suppose I should have included what I use my truck for. It's not a daily driver. It just goes to the strip, car/truck shows and I'll take the wife for a cruise every now and then. I put on less than 2,000 miles a year.

 

id say the meth/water injection would be fine for your app then

 

Terry said that running water injection is the best for cooling. If I see any KR, than add the meth.

 

yes some run a mixture and the water is for the cooling and the meth is for fuel/octane boost

 

You'll need to retune your setup,because it will probably pickup about 1.5lb more boost.For a track only setup you should be fine running meth/water injection.I would keep some meth in the system because of the octane bump and it's effect on timing.You'll probably be seeing your boost coming in sooner too.

 

Tuning , plus the additional boost is the fun part.

 

Water injection is a double edged sword. I ran it for five years before removing it just last month. You can keep adding water to a point, but water vapor takes up space in the comustion chamber and does not burn. That space would be better filled by cool air and fuel. At some point with water injection you will start to lose power. If more water is being injected than can be absorbed by the heat in the charge air you'll get misfires. I had my setup right on the edge of that threshold. In the winter I had to switch to a smaller jet because the cooler more humid air could not absorb and give up enough heat to the water jet used in the summer. I used 10GPH in the summer, 7GPH in the winter with 7psi of boost on the 350. (Never used water on the 383.)
To be effective an intercooler has to acommodate spikes in charge air and smooth it all out to a very steady cool temperature not too much warmer than ambient ont he discharge side. For example, if you see a significant rise in IAT during wide open throttle it could mean the intercooler isn't pulling heat out efficiently enough.
I like the intercooler much better. The H20 injection system was very thirsty and you have to buy distilled water for it. Ironically, I was buying methanol in bulk from work and it was actually cheaper per gallon than distilled water. I ran a 50/50 mix int he summer, straight water in the winter. Climate really does make a huge difference.

 

I'll try the H2O injection and the Snow Performance Stage 2 with dual 375 nozzels. If it dosen't work as expected, I'll probalby switch to an air to air intercooler. I appreciate all the feed back. Thanks