If you need a 13 gal water tank I suspect you would lose your driver's license long before using up all the water. Not even I stay in boost that long.
On Tue, Apr 29, 2008 at 2:37 PM, Russ <[EMAIL PROTECTED]> wrote: > Holy cow… 1.5:1? So with a 13 gallon gas tank, you'd want an equivalent > sized water tank. Doesn't need to be 1 ½ times the size since you wouldn't > be running WI all the time, just while on boost. > > > > > > *From:* [EMAIL PROTECTED] [mailto: > [EMAIL PROTECTED] *On Behalf Of *Bill Cardell > *Sent:* Tuesday, April 29, 2008 11:19 AM > *To:* MiataPower List > *Subject:* More water inj stuff > > > > Again from autospeed:* **Experimental test data show that water injection > into an unheated manifold, when the engine speed is reasonably high, will > not give water a sufficient time to vaporise during the compression stroke. > Of course, in normal operation of a naturally aspirated engine the water > does not vaporise until after combustion is well under way. This effect well > explains why injection of water into very highly compressed or supercharged > engines has been successful.* > > *It is well evident that water injection slows the combustion process down > in SI [spark ignition] engines. Thus to maintain standard MBT* [mean best > torque]* **spark setting the timing should be advanced... when using water > injection gasoline combinations.* > > The use of water injection in water/fuel ratios from 0-1.5:1 caused the > research octane number (RON) to rise from 70 to 93 and the motor octane > number (MON) to increase from 64 to 90. NOx emissions were substantially > decreased, being reduced by more than 50 per cent when a water/fuel ratio of > 1.5:1 was employed. Lanzafame suggests that the best results of water > injection come with a water/fuel ratio of 1.25:1. > > With an intake air temp of 143 degrees C and a water/fuel ratio of 1:1, > the paper shows that peak cylinder pressure occurred about 20 crankshaft > degrees later and that the peak cylinder pressure was reduced from 56 Bar to > 37 Bar. With water injection occurring, rapid fluctuations in peak pressure > were also much reduced. Exhaust gas temperatures also dropped, falling from > 705 degrees C with no water injection to 692 degrees C with a water/fuel > ratio of 0.5:1, 675 degrees C with a water/fuel ratio of 1:1, and 665 > degrees C with a water/fuel ratio of 1.5:1. > > Look at the increase in octane rating! And also the ratio of water/fuel, > who needs gas? FWIW, since I've been running it on our Westfield, we will > be offering the Snow Performance kits shortly. Nice stuff, simpler and > cheaper than the hydramist and doesn't require a programmable ecu. > > Bill Cardell > TurboDog's Dad > www.flyinmiata.com > 1-800-FLY-MX5S (sales) > 970-464-5600 (tech) > 2008 FM Open House: August 14-17 > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > > -- Robert McElwee and Red Beast 1991 T25 Turbo @ 15 PSI Link ECU, FM IC, 9:1 pistons Over 400 lbs of "added lightness" www.lightweightmiata.com Lightweight Miata Forum: www.lightweightmiata.com/forum The Miata Trailer Project: www.lightweightmiata.com/trailer
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