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Discussion Starter · #1 ·
For all of you that use water/alky injection, tell us how it has worked for you. Let us know the ease/difficulty of installation, where you mounted the pump/tank, and where you mounted the injector(s). What kind of gains did you see, and what mods do you have.

Let us learn from your experience!
 

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EngineRunup said:
For all of you that use water/alky injection, tell us how it has worked for you. Let us know the ease/difficulty of installation, where you mounted the pump/tank, and where you mounted the injector(s). What kind of gains did you see, and what mods do you have.

Let us learn from your experience!
I have the SMC progressive kit:

1) Installation was pretty easy - just had to figure out the best routing from the nozzle to the engine bay, and that ended up being through the big gromet in the driver's side wheel well

2) Tank and pump are in the driver's side wheelwell in the trunk

3) The nozzle is plumbed into the stock upper intercooler pipe. If I had an aftermarket UICP, it would be in the elbow just before the TB.

4) Going from 21psi to 26psi, I gained 34whp and 80wtq. From 307whp/280wtq to 341whp/361wtq.

5) tbe, mbc, bov, fuel pump, panel filter, dynoflash, ported/coated stock manifold/hotside/o2 housing
 

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Warrtalon said:
Yes, I love it, but I believe that the progressive feature is critical on an Evo.
I'm not questioning you at all, I am just wanting to know what makes you come to this conclusion.
 

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I also have the SMC kit, but I think I personally would prefer an "all or nothing" setup rather than progressive since I have the AEM EMS and can tune for it good. I think the progressive system works better for people using the stock ECU with a flash for engine managment.

My mods are full Buschur Racing stage 4 with HKS 272 cams, adjustable cam gears tweaked for better idle, sheet metal intake manifold, Buschur stage 3 head, GT35R turbo kit, and the alcohol injection.

Keith
 

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EngineRunup said:
I'm not questioning you at all, I am just wanting to know what makes you come to this conclusion.
For me, it's because I don't need nor want 100% spray all the time. I don't need any knock resistance for boost up to 18-20psi, and I don't need 100% spray even at 20psi. The way mine is setup is it doesn't start spraying until 18psi or so and doesn't go full spray until 26psi. Since I only run 26psi peak anyway, then I'm rarely at 100% spray. With less alcohol being used, I am potentially not getting as much power as possible, but at the same time, it means that I have a much larger margin of safety if my alky fails for any reason.

A side effect of this is that I also don't use a lot of alky. I road raced this entire past weekend and expected to use a full gallon of alky during each 20-25 min session. Since we had 4 sessions each day totaling 90mins of track time, I brought 4 cans of denatured alky (1 gal each) the first day with the expectation of having to buy 4 more Saturday night for Sunday's sessions. However, by the end of Sunday, I had run 7 sessions for a total of 135-140mins of track time and only used 3 gallons of alky. I was very pleased by this, because it means I can go a full 25-min session of full boost with no obstruction and not worry about my alky running out.
 
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