Subject	What is the intended result of this mod?
Posted by	Marshall on February 24, 2005 at 3:00 PM
	This message has been viewed 84 times.
In Reply To	Electric Water Pump Mod - Progress >>>> posted by Ash's Z on February 24, 2005 at 12:06 AM
Message	Do you plan on installing a switch to turn it on/off for the track? If a 1/4 HP electric motor is able to drive the water pump as well as the stock water pump, then it stands to reason that this mod would save 1/4 hp at the most, if it was off. But since you're driving it electrically with the alternator, the alternator will have to provide 186.5 watts to the motor. Since a car alternator has an efficiency of ~80%, and a DC motor has about the same efficiency, you're losing about 40% of the energy in transmission. Considering that the water pump was being driven fairly directly before, it would have been pretty efficient. I guess I'm just missing how this will free up power when it seems that it's really just incurring efficiency losses. I'm not trying to rain on your parade, I just like to see proof in numbers.
Follow Ups	Electric Water Pump Mod - Progress >>>> - Ash's Z 00:06:42 02/24/05 Whoa, that's cool! - ZFreak (Dallas) 00:11:37 02/24/05 About 1300F cool actually. :) Just imagine cutting an old - Ash's Z 00:17:07 02/24/05 Time to make 2 spares to sell then, right? (n/m) - ZFreak (Dallas) 01:01:56 02/24/05 Well, lets see how it works first. If it works as planned, - Ash's Z 02:31:22 02/24/05 I'll take one if they aren't already spoken for ;) - Rob'Z 02:51:02 02/24/05 What DON'T you do? I always love seeing these posts... - whitepearlz 00:13:14 02/24/05 ash you never seize to amaze me..seriously! (n/m) - College Boy 00:13:41 02/24/05 *cease (n/m) - Justin (So Cal) 00:21:32 02/24/05 Zeeze? (n/m) - College Boy 00:22:44 02/24/05 Gesundheit (n/m) - robo (sebring1970) 02:58:14 02/24/05 Thats a good one (n/m) - mxsprocket1 09:48:37 02/24/05 What college do you attend? Hopefully technical one...... (n/m) - KLRBIRD 11:06:03 02/24/05 Are you human? - ZXRider(SoCal) 00:17:53 02/24/05 Re: Are you human? - Barbiecar 08:20:15 02/24/05 Interesting :) (n/m) - CrazyGreek 00:18:08 02/24/05 You just made me think back to HS shop class... - BradZ (FL) 00:19:00 02/24/05 you're quite the jack of all trades!! - FantomZ32 00:19:51 02/24/05 Hope you the best of Luck! (n/m) - ranryu 00:24:31 02/24/05 OBDII? (n/m) - Zluster(Project Platypus) 00:32:42 02/24/05 That is on the list and I hope to be getting to it soon. - Ash's Z 01:00:43 02/24/05 cool.... - Zluster(Project Platypus) 11:25:12 02/24/05 Paint? (n/m) - YugoBernie (NoVA) 01:35:59 02/24/05 Garage? (n/m) - Zluster(Project Platypus) 09:06:09 02/24/05 DAMN!!! You are a genius! - TheTwinZ (Peru) 01:48:52 02/24/05 This set up would work best at the track, in between runs - Eishozzzz 03:31:22 02/24/05 good job. How much current draw will it have? (n/m) - E=m[91NA-(2+2)-(5sp)]² 07:33:16 02/24/05 1hp=744w. 744/4 = 186w 186w/12v = 15.5a. (n/m) - Ash's Z 11:23:12 02/24/05 Why do you divide by 4? - degradated 12:09:58 02/24/05 The motors are 1/4 hp. (n/m) - 90Z-NA (ATL) 12:50:55 02/24/05 746w (n/m) - Marshall 14:22:53 02/24/05 745.7 ;) (n/m) - 300zx90 15:02:28 02/24/05 Heh, I think I have WagZ dyno # stuck in mind, LOL. (n/m) - Ash's Z 16:41:16 02/24/05 haha, very cool. you're sandcasts are getting better - Z32POWER.com 07:40:03 02/24/05 link to purchase electric water pumps>> - ScubaSteve 08:44:12 02/24/05 Ummm...do I wanna know how you made the holes? :) - Milo (Sport Z Magazine) 08:58:54 02/24/05 Ha, those are some pretty small holes, too :) (n/m) - Haasz32 10:32:19 02/24/05 It's not the size of your water pump..... (n/m) - Milo (Sport Z Magazine) 10:49:56 02/24/05 Check out using Plaster instead of Green Sand. - Gordo 93TT NYC 10:34:40 02/24/05 what are the advantages of an electric water pump? (n/m) - Nixta TTZ 10:51:54 02/24/05 takes a load of the crankshaft - 3 double-0 ZX(Va Bch) 11:02:13 02/24/05 It drives the alternator and the fan that is mounted to the - Zirvana 11:42:22 02/24/05 only if you can take if offline. - Marshall 14:35:41 02/24/05 At WOT, the alternator circuit is disengaged. - Ash's Z 00:58:06 02/25/05 Ash... you are hardcore. - aggiez32 11:59:18 02/24/05 Heh. You've certainly got initiative. Good luck. (n/m) - Kenny 12:42:06 02/24/05 Why bother casting? You'll still need finish machining, so - 300zx90 15:00:27 02/24/05 I dont have a mill or lathe yet, so milling it is out of the - Ash's Z 16:50:21 02/24/05 What is the intended result of this mod? - Marshall 15:00:34 02/24/05 A few things are in mind about it >>> - Ash's Z 17:09:29 02/24/05 Last paragraph states 95% of the benefit, IMO. - RSR 20:36:13 02/24/05 Good info, thanks. (n/m) - Marshall 10:49:13 02/25/05 OK now start on your intercoolers... (n/m) - PIRANHA 20:48:44 02/24/05
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