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Old 08-27-2008, 04:46 PM
Razor Razor is offline
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Join Date: Dec 2007
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Quote:
Originally Posted by I8AV8 View Post
i have run a water/methanol injection system for years (mixed at 50/50) on my turbo buick that uses a washer bottle w/integrated pump from a nissan, a hobbs pressure switch and discharge jet in front of the T/B. the switch turns pump motor on at 2 psi, so the system is primed and pumping when i get to full boost - it works great.
Why spend $500 on an alky kit when water inj has been successful in turbo applications since WW2?

is the goal to kill detonation, or add fuel, or both?
Doing what your doing, your not adding any fuel. And I doubt you can get any really "real" gain due to the pressure output of the pump you run. The $500 dollar alky kits pump will make over 200 PSI pressure vs the 20-30 PSI pressure a WW pump will make if that.

As the boost increases the output of your pump decreases due to pressure in the intake pipe. So forget trying to run 30 PSI boost on 91 octane as your doing it. This may not be your goal. Thats fine.

Does a little liquid being injected into the intake tract work.. sure does. Guess it depends on your goals. If your trying to kill detonation at 30 PSI boost on marginal gasoline octane, your setup will never support that.

The first alky kits from BG Customs used a little tank with a WW pump. The Edelbrock VariJection used a similar setup.. this was 10+ years ago and the items worked. So did 286 computers. Technology has advanced and so have the "kits". Today we see 200+ PSI pumps, teflon braided hoses, electronics, dedicated systems per vehicle, custom proms, etc.. So as time progresses there have been advancements to the WWII scheme of things.

So yes.. we use todays systems to suppress detonation, as a fuel system, and as both. And increase the performance/drivability through better design of a simple concept.
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