evolutionm.net - View Single Post - Water injection as intercooler replacement?

firefighter81 · Nov 15, 2008, 05:47 AM

This isn't Evo related at all, but this seems to be the most active water/alky injection forum I can find.

Late next year, I'm going to be picking up an early 70's KGC10 Nissan Skyline. It's got an L20 engine in it, but the RB25DET swap is fairly straightforward, just custom motor mounts.

Where the problem comes in, is with the design of the car, installing a front mount intercooler involves cutting into the car quite a bit, something that I'm not really interested in doing in a 40 year old Skyline.

So the RB25DET runs about .7bar stock with a side mounted intercooler. If I had no intercooler, and instead ran a water injection setup, could I maintain stock boost? Or even possibly bump it up to about .9bar? My power goals aren't huge, maybe 260rwhp.

I've ran water injection on an Evo before, but that was in conjuction with an intercooler. This setup will be pure water injection.

Note: Methanol is a controlled substance here in Japan, so I can't get it. Closest thing I could get would be Denatured Alcohol or rubbing alcohol.

Any help on this would be appreciated!

Nov 15, 2008, 05:47 AM	#1
firefighter81 Newbie Personal Sales Rating: (0) Join Date: Aug 2005 Location: Okinawa Posts: 98 Drives: 2001 Silvia Spec-R	Water injection as intercooler replacement? This isn't Evo related at all, but this seems to be the most active water/alky injection forum I can find. Late next year, I'm going to be picking up an early 70's KGC10 Nissan Skyline. It's got an L20 engine in it, but the RB25DET swap is fairly straightforward, just custom motor mounts. Where the problem comes in, is with the design of the car, installing a front mount intercooler involves cutting into the car quite a bit, something that I'm not really interested in doing in a 40 year old Skyline. So the RB25DET runs about .7bar stock with a side mounted intercooler. If I had no intercooler, and instead ran a water injection setup, could I maintain stock boost? Or even possibly bump it up to about .9bar? My power goals aren't huge, maybe 260rwhp. I've ran water injection on an Evo before, but that was in conjuction with an intercooler. This setup will be pure water injection. Note: Methanol is a controlled substance here in Japan, so I can't get it. Closest thing I could get would be Denatured Alcohol or rubbing alcohol. Any help on this would be appreciated!
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