Is an electric water pump worth it?
04-18-2007 | 07:28 PM
#41
Originally Posted by koolaid_kid
First, I am not promoting electric or mechanical. I personally do not care. I have the stock mechanical pump and I have no complaints.
If you truly run your car at high rpm only (or mostly) I find it difficult to believe that you drive on the street. Even my motorcycles run mostly lower rpms unless I can find an empty stretch of road where I can open them up.
If you drive on the street, your rpm are mostly lower (IMHO), and the maximum flow rate of a mechanical pump must be discounted. Our LT1s are supposed to shift at 5700, IIRC.
If you change a part for a different one, and gain horsepower, then the new part must be more efficent than the old one. How could it be otherwise?
If you truly run your car at high rpm only (or mostly) I find it difficult to believe that you drive on the street. Even my motorcycles run mostly lower rpms unless I can find an empty stretch of road where I can open them up.
If you drive on the street, your rpm are mostly lower (IMHO), and the maximum flow rate of a mechanical pump must be discounted. Our LT1s are supposed to shift at 5700, IIRC.
If you change a part for a different one, and gain horsepower, then the new part must be more efficent than the old one. How could it be otherwise?
Efficient would imply doing the same work but using less energy. The electric pumps do less work using less energy.
Far as the discounting the mechanicals max flow as I said when you need more cooling is under load and I don't know about your car but if mine is under load the rpms are probably climbing in a BIG way. If you want to talk low rpm though how about 20gpm at 2000rpm that is probably in the ballpark for everyone's cruise rpm right?
I have no way to test it but I bet the electrics restricted by the cooling system do not actually move much more than that, Alan's car running warmer at cruise backs this up.
The LT1 might be factory set to shift at 5700 but most bolton cars will shift higher than that even the b-bodies with their "truck" cams shift around there with a good tune.
04-18-2007 | 08:41 PM
#42
I'd be curious what the differences are in cruise temp between the regular Meziere and the HD version and rwhp differences between the two...and does anyone know if the HD pump is physically larger?
--Alan
--Alan
04-18-2007 | 09:56 PM
#43
The alternator at peak output is capable of supporting less than 2hp I honestly can not begin to believe that the electrical load difference between the standard and HD electrics would showup at the tires.
04-19-2007 | 12:43 PM
#45
Staging Lane
Joined: Apr 2007
Posts: 87
Likes: 0
From: Carlinville, IL
Originally Posted by vseventyone
I'm not picking sides in the debate, but here is an insteresting site that show a little how to, and a before and after dyno run. Don't shoot the messenger, I know dyno number are not everything. But, none the less, at least this a way to measure before and after. BTW, one of the biggest reasons I run a E-pump is for timing set options.
+1 FTW
04-19-2007 | 06:27 PM
#46
Teching In
Joined: Jan 2007
Posts: 15
Likes: 0
From: memphis, tn.
electric by far! ive got a 94 that i put the mezieri on and use it as my daily driver. it is a bit difficult to install ( **buy new wp gaskets**, remove old mechanical, remove cover, press out impeller with a machine press, install freeze plug...which is included, install electric where cover went, remove passenger fan and cut out a section for clearance, install entire assembly back on block, wire it up, test it, put fan back in, and its ready) took me a couple of hrs, but worth it, bc ive had no leaks outta it yet. be sure to use 3M yellow sealant with the new wp gaskets....it rocks better than rtv blue or black sealant.
04-19-2007 | 09:23 PM
#47
Thread Starter
Staging Lane
Joined: Oct 2005
Posts: 92
Likes: 0
From: the sneads fizzle, NC
Thanks for all the input,I went ahead and got a new stock pump.It was only $85 with gaskets and I thought that was a pretty good deal.Now just to put it in and get the T/A back on the road.
04-22-2007 | 07:00 PM
#48
Originally Posted by ZEX-Z
I gained 6 hp and 8 ft lbs at the wheels with the Mezier and I drive it everyday.
