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Discussion Starter · #1 ·
<A HREF="http://www.enginerunup.com/how-it-works-faqs/info_8.php" TARGET="_blank">http://www.enginerunup.com/how...8.php</A><p>Are these guys for real? Are people actually injecting water mist into their intake? Anyone tried this in their <I>R</I>?<p>I gave it a quick read and it sounds a bit dangerous.<p>Comments?<p>LTA<br>
 

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Re: Water injection, sounds crazy! (LTA)

Water injection isn't new, does basically what the site says (I just scanned it quickly). Article does seem a bit optimistic on some of the points, but water injection itself isn't snake oil.<p>R&T article a few months back about Jay Leno and his 700hp, twin-turbo, 1967 Buick Riveria (built with lots of Corvette chassis, suspension, brake pieces, etc). Engine required 100 octane unleaded to prevent detonation, but the article mentioned that his mechanic was installing water injection to allow it to run on 91.<p>That's the basic benefit. To what degree - if any - it would hight help the R, I don't know. I think this has been discussed previously. Do a search.
 

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We would use a mixture of water and methanol to reduce the risk of detonation in high boost or on boosted high compression engines, this cools the intake charge to eliminate detonation and increase the ability to run higher levels of boost. Basically helps to increases intercooler efficiency. Water injection if not installed properly can cause bore washing or in very unusuall situations hydrolock can occur<br>Jonathan
 

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Discussion Starter · #5 ·
Re: (JonnyEnglish)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>JonnyEnglish</b> »</i></TD></TR><TR><TD CLASS="quote">We would use a mixture of water and methanol to reduce the risk of detonation in high boost or on boosted high compression engines, this cools the intake charge to eliminate detonation and increase the ability to run higher levels of boost. Basically helps to increases intercooler efficiency. Water injection if not installed properly can cause bore washing or in very unusuall situations hydrolock can occur<br>Jonathan</TD></TR></TABLE><p>Thanks Johnny. Installation is one thing but I'm sure maintenance and regular use or abuse could cause bigger problems. In this light it seems this is NOT the thing for the every day street R. <p>FMIC may be more expensive and have less affect (that's a guess) but FMIC is a much safer option, especially for everyday driving (install it and forget about it).<p>LTA<br>
 

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Re: (LTA)

Somebody on this board installed water injection on their R and used the windshield washer reservoir for the source. I thought it was really trick because the when the reservoir got low it would light up a warning on the dash display.<p>I learned alot about water/alcohol injection on this board a few months back. I always assumed they meant spraying water directly on the intercooler surface. But in fact, they spray the intake charge!
 

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Re: (steamboatsig)

Water injection is <I>sooo</I> 1940's.<p>(That was intended to be funny, not snotty)<p>Used in piston-driven fighter aircraft of the era.<p>My 1982 Mazda RX-7 had a water injection injection system. Actually, you were supposed to fill it with a water/anti-freeze mix. You can't inject ice, you know!<p>The mixture helped the rotors seal against the housing to help cold starting. It was impossible to start the damn thing in sub-freezing weather if the little reservoir was empty.<p>It would be interesting to know if current rotary engines still employ this crutch.
 

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Re: Water injection, sounds crazy! (LTA)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>LTA</b> »</i></TD></TR><TR><TD CLASS="quote">Are these guys for real? Are people actually injecting water mist into their intake? Anyone tried this in their <I>R</I>?<br></TD></TR></TABLE><p>IPD has tried it... still trying it... maybe they will bring it to market? <p>What is very cool about using the windshield washer resevoir is that you actually inject washer fluid into your engine, because it is a mix of water and alcohol. Totally freaking nuts, but it works. Also, has the built in sensor warning when resevoir gets low. <p>This would be very useful if someone didn't want to run 94+ octane and was concerned about detonation running BSR (a little lean in upper revs evidently) with a 3" DP.
 

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I am using the Aquamist system...in fact I have a dual setup.<p>1 is set to trigger at 1.1bar and the other at 1.4 bar.<p>So far both have worked flawlessly for the past 6 months. <p>The car has been on long road trips where avg speed is 110mph as well as on the track. In no instance has the units failed.<p>Because my car is tuned by MTE, we can advance ignition timing to take advantage of the Aquamist system <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0">
 

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Re: Water injection, sounds crazy! (LTA)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>LTA</b> »</i></TD></TR><TR><TD CLASS="quote"><A HREF="http://www.enginerunup.com/how-it-works-faqs/info_8.php" TARGET="_blank">http://www.enginerunup.com/how...8.php</A><p>Are these guys for real? Are people actually injecting water mist into their intake? Anyone tried this in their <I>R</I>?<p>I gave it a quick read and it sounds a bit dangerous.<p>Comments?<p>LTA<br></TD></TR></TABLE><p>We are now selling Aquamist systems. They will be featured in our new catalog, which mails in about 3-4 weeks. We have used it on several project cars over the years with excellent results. Aquamist builds a very serious hihg tech product used mby many top WRC teams. Learn more abot it at <A HREF="http://www.aquamist.co.uk" TARGET="_blank">http://www.aquamist.co.uk</A>
 

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Re: Water injection, sounds crazy! (StaggRLee)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>StaggRLee</b> »</i></TD></TR><TR><TD CLASS="quote">"blot" is running an Aquamist 2D water injection system.</TD></TR></TABLE><p>Yes indeed. I'm running a 2D system with priming pump and an extra accumulator. This allows me to run 2 nozzles of 0.5mm for a water injection rate of up to 360ml/min or a 10 to 12% water to fuel ratio.<p>Discom on the other hand is running a dual 1S system.<p>So far no problems at all...and it allows me to run an aggressive ignition advance timing without fear of detonation.
 

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Discussion Starter · #15 ·
Re: Water injection, sounds crazy! (blot)

Hey Blot,<br>You've done an amazing amount of work to you car!<br>Can you comment on the effects of the water injection vs. the FMIC? ie. if you had to choose just one (FMIC or Water Injection) which one would you choose and why?<p>Thanks,<br>LTA<br>
 

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Re: Water injection, sounds crazy! (LTA)

Always do the FMIC first as that will get the most gains out of the car. Water injection in my case is to help bring down intake temps further and also to prevent detonation at high rpms...(redline at 7500). Of course the system also allows a methanol/water mix for even more power, but I'd use higher octane fuel before using the former.
 

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Re: Water injection, sounds crazy! (Sue Esponte)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Sue Esponte</b> »</i></TD></TR><TR><TD CLASS="quote">Scott,<p>What kinds of results are you finding?</TD></TR></TABLE><br>Yes, indeed; what kind of results are you finding? Is is really possible to get the performance of 94+ octane from 91 octane pisswater using the water injection? If so, I may have to re-think my decision to pass on modding my R (I don't want to be tethered to gas stations selling 100 octane racing unleaded gas).
 

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Re: Water injection, sounds crazy! (LTA)

Here is an excellent Article by Richard Lamb of Aquamist:<p> <A HREF="http://www.volvoclub.org.uk/forum/showthread.php?t=13970" TARGET="_blank">http://www.volvoclub.org.uk/fo...13970</A> <p>Also, here is some discusion on water injection:<p> <A HREF="http://www.aquamist.co.uk/phpBB2/index.php" TARGET="_blank">http://www.aquamist.co.uk/phpBB2/index.php</A> <p>Enjoy~
 

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Re: Water injection, sounds crazy! (Sue Esponte)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Sue Esponte</b> »</i></TD></TR><TR><TD CLASS="quote">Scott,<p>What kinds of results are you finding?<p>-Eric</TD></TR></TABLE><p><br>On the R's in particular, you can retain performance in hot weather. As most of you are aware, the R suffers from heat soak (loses 10-20% power) when ambient exceeds 80 deg and it gets worse as the temp rises. You won't see it on a boost gauge as ME7 pulls igntion timing to control this problem, not boost. <p>In simple terms, Aquamist will provide about a 20-30 degree ambient shift. <p>ie- 100 ambient is seen as 70-80. <p>For the more tech savy, this is actually occuring via the IAT. The lower realized IAT allows ME7 to operate on ignition advance data correlating to the lower temps, in other words, more advance/ more power. <p>We were able to verify this last summer during early Aquamist testing on our V70R project.
 
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