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Old 11-19-2006, 12:41 AM   #1
Evil Dr. Scoob
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Default Water/Methanol Inj on 2.2L turbo

I'm setting up a TD04 to run low boost (5lbs) on my 98L without intercooler. I was thinking water/methanol injection might work as a safeguard against detonation. I found the link for the project WRX setup:
http://www.projectwrx.com/modules.ph...howpage&pid=34

What the write-up doesn't provide, since he's using engine management, is how I can trigger the alky injection at specific RPMs or boost pressure. So my question is how can I do this with a homemade system?

Christian
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Old 11-19-2006, 03:10 AM   #2
hippy
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You need a boost and/or rpm switch.

peace
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Old 11-19-2006, 09:13 AM   #3
dibblejr
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Without lower compression pistons your engine probably wont last that long. Alky/ Water injection may postpone the disaster, but more often than not high compression pistons on NA cars wont last long.

Jay-R
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Old 11-20-2006, 12:01 PM   #4
Evil Dr. Scoob
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Even with 5 lbs of boost? There are people running low boost with absolutely no engine management/timing adjustment. I would imagine that alky inj would offer additional protection against detonation, at least that's what every post here says; and detonation is what's going to cause problems with the pistons.
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Old 11-20-2006, 12:30 PM   #5
DonkeyPunch
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Yes, if you keep the boost pressure moderate, 5-8 lbs, with a decent EM you should be fine even without alky. With alky, this will act as a buffer, and let you push the car a little harder with the same boost pressure, or a little more, and still be safe. Now I recommend getting some sort of aftermarket fuel computer. Even a Apexi Super AFC would be better than the stock engine managment. You need to be able to take away fuel based on how much alky you inject. Also something that can vary your timing would be nice also. You will be able to advance timing, also adding more power if you use alky/water.

The original question, get a snow performance varible controller. It has two boost set points. The lowest one kicks the pump on at half pressure at a certain boost pressure, and then when you reach the next pressure you set, it kicks the pump on full pressure. Now you may not need the two pressure controller since you are only running 5-8 lbs of boost, and you may quench the flame kernel from the plug with starting the spray two early after on boost. So maybe just set the lower boost setting way high to a pressure you won't see, and then set the high boost knob to the pressure you want to spray at, probably about 5-6 lbs. You might be able to get away with just the low boost spray knob being used.

Here is the product description. There are other controllers from other companies to, check them out also. Devil's Own, Cooling Mist, etc.
http://www.snowperformance.net/prodd...p?prod=auto030

DP
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