Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical Chat

Post Reply
 
LinkBack Thread Tools Display Modes
Old 03-10-2013, 09:31 AM   #1
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 3,150
google or a search on this forum will find lots of talk about electric PS. cup cars run electric PS, and you can find cup car electic PS motors on ebay and the forums. expensive, and they are just repurposed mercedes a-class electric ps motors. mostly a euro thing, you cna find them (relatively) cheap on ebay.uk. another common electic PS pump used is from the mr2. regardless, watch what you buy as different pumps (even for the same car depending on year) have different controls; you want something that is on/off and without steering position and engine speed controls.

renegade hybrids does electric water pump conversions, but for replacing the m96 with an ls-series engine (no room for accessories when putting the ls in a 996). most of the parts are off the shelf from rodders (search jegs and whatnot); you would have to fab a blocking plate for the water pump and tstat.
The Radium King is offline   Reply With Quote
Old 03-10-2013, 08:15 PM   #2
Registered User
 
Join Date: Mar 2013
Location: idaho falls
Posts: 257
Quote:
Originally Posted by The Radium King View Post
(search jegs and whatnot); you would have to fab a blocking plate for the water pump and tstat.
I'm with you on the on/off switch... my thought is that the car is so light and weight neutral, steering effort is probably pretty mild regardless. About the only time you'd want it is around town and even then mostly just in parking lots. IMO, turning the PS off would probably make the box a lot more fun to drive while still maintaining the convenience of not going through an upper body workout every time you hit the mall.

Jegs is where I started with water pumps (I guess great minds really do think alike ). A small, stand alone pump would be easy, cheap, and robust. For simplicity, I'd probably just stick it in-line and use the old pulley driven pump itself as the block off plate. Just remove the impeller, pulley, shaft, bearing, etc and plug the hole. Bingo! Instant block off plate with perfect dimensions and intake fitting that's ready to rock 'n roll with a stock $5 gasket. The only difference is the incoming water is already pressurized instead of being pumped through the housing via the impeller.

Here's a link to Pedro's write up with some decent pics for visualization:

Replace Water Pump

(BTW, electrifying accessories has been shown to increase efficiency resulting in mpg and HP gains by reducing parasitic drag on the engine).
sam c. is offline   Reply With Quote
Old 03-10-2013, 08:48 PM   #3
Registered User
 
Join Date: Mar 2013
Location: idaho falls
Posts: 257
To put things in perspective, I've used a non-turbo 2g eclipse as a DD to run back and forth to the day job for the last couple of years. The car was cheap to buy, cheap to maintain, practically free to insure, and I don't care about racking up the mileage during my 110 miles/day commute.

They're 140 hp stock out of the box. Not much but enough for a 2600 lbs car that's pretty slippery to the wind. Plus, I have a few ideas to shed some pretty serious pounds without stripping it out like some high school kid with his Honda.

Now here's where things get fun though... There is some debate to these numbers but the dynos report that the PS pump alone uses 5-8 hp at highway speeds. To put this in perspective, the car only requires about 20 hp to maintain 75 mph.

With some aero mods, a change to a 3.55 final drive ratio, an UD pulley, and a PS delete, the car routinely gets 44 mpg and dynos at about 155 hp running on the ********************tiest gas possible. Ground breaking? No, but it has no problem running at 130 mph on the highway with absolutely no fuss or effort. Hell, its wearing cinder block heavy 17's and running staggered 235 front/255 rear tires (on a fwd car ). Certainly not because it needs them but because I like the grip and look. Haha.

The short version of all this is that accessories are a huge drag on an engine and thats why everyone is going electric.
sam c. is offline   Reply With Quote
Post Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 10:27 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page