EBP vs. pump rebuild any opinions?

[greezmunky]

Pros? Cons? I want to use this pump www.daviescraig.com.au/newproduct_ebp.html its the same one that andy whittaker uses and I feel pretty comfortable trusting his judgment. I was also planning on adding a thermostat switch and a couple of relays to keep the pump running after I shut the car off. Any thoughts?

[katolotus]

Dermots has done the same thing on his S4 (see owner page on www.lotusespritworld.com). It might be worth emailing him through the UK Yahoo Group (www.lotusespritworld.com/links.html) and asking his opinion. It's difficult to fit from what I've heard, but works great.

As for leaving it running after the engines been turned off. I don't see the point. As far as I know (waiting to be corrected) the pump is for the Chargecooler, which cools the air after the turbo (see www.lotusespritworld.com/EMaintenance/chargecooler.html) before it is push into the engine for combustion. No real point in leaving it running after the engines turned off, as what's the point in cooling as no air is passing through the turbo.

Great idea to fit the electric pump though. Just a shit job. You can get the pump from Demon Tweeks and it's not expensive.

Hope I've been of some help. I'm sure others will know more.

kato
Lotus Esprit World

>> Edited by katolotus on Saturday 1st February 10:29

>> Edited by katolotus on Saturday 1st February 10:30

[janszott]

The EBP pump has a capacity of about 3 gal/min. www.mawsolutions.com/documents/ebpinfo.PDF

I also heard that some people were using the JABSCO 18510-0020 pump tha has a capacity of 15 gal/min. http://jabsco.nxtranet.com/prodInfoApp/servlet/DisplayItemDetail?itemId=18510-0020&catalogId=Marine&categoryId=JMGEN&typeId=JMGCR

There was a post on turboesprit a while back that said 4 gpm was not up to the job and that you need 15 gpm.

Does anyone know what the capacity of the standard mechanical pump is?

[lotusguy]

Pros? Cons? I want to use this pump www.daviescraig.com.au/newproduct_ebp.html its the same one that andy whittaker uses and I feel pretty comfortable trusting his judgment. I was also planning on adding a thermostat switch and a couple of relays to keep the pump running after I shut the car off. Any thoughts?

GM,

Why do you want to use this pump? Is there a problem with the stock pump? Does the chargecooler feel warm when you touch it? If not, using a different pump will provide no improvement.

Secondly, why in the world would you want to run a chargecooler pump with the engine switched off and no charge to cool?

Bigger is not always better and more is not always more. If your chargecooler is providing sufficient cooling to the intake air, leave it alone and concentrate on other things.

If on the other hand you are planning on 'splicing' the pump into the cooling system, pretty much the same arguments apply, except to say that cooling at low RPMs such as in traffic (provided you encounter significant amounts, regularly) will be improved. A run-on pump added to the 3 fans to provide post shut-down cooling will be a tremendous drain on the battery, shortening it's life and increases the potential of stranding you away from home. When you add this to the minimal benefit derived, there's little cost/benefit here either. Happy Motoring! Jim85TE

>> Edited by lotusguy on Saturday 1st February 17:15

[greezmunky]

duh ok nevermind the after run thing.. I was thinking back to my honda days then I'd wire similar pumps to keep that coolant flowing through the turbo after the car was shut down. Anyway I am trying to put this car together on a budget (which i have already blown) and I was planning to completely bypass the mechanical chargecooler pump and use an electric pump in its place. I like the fact the the electric pump is not dependant on engine speed and I wouldnt have any problem throwing together a temp driven power supply so I can use a bigger electric pump but only have it work hard as needed. Something like this www.daviescraig.com.au/newproduct.html with the controller and I'd be replacing the mechanical pump with something really superior for about the cost of a pump rebuild at my local lotus dealer.

[greezmunky]

Oh yeah.. I acquired this car with 31k miles and no service records.. I will get the pump rebuilt unless i can find a suitable alternative

[cnh1990]

I have a stereo power amp. I run the A/C alot during the summer and in the fall the heater so the blower is going a lot. My alternator is marginal even after the rebuild. I went the OEM pump rebuild. Pretty easy, 2-3 hours. After the rebuild I understand how the chargecooler is supposed to feel. During the fall run. I touched the box, ice cold even when the engine compartment was hotter than blazes. The turbulence in the header tank even at idle was tremendous
Calvin 90 SE

[lotusguy]

greezmunky said: duh ok nevermind the after run thing.. I was thinking back to my honda days then I'd wire similar pumps to keep that coolant flowing through the turbo after the car was shut down. Anyway I am trying to put this car together on a budget (which i have already blown) and I was planning to completely bypass the mechanical chargecooler pump and use an electric pump in its place. I like the fact the the electric pump is not dependant on engine speed and I wouldnt have any problem throwing together a temp driven power supply so I can use a bigger electric pump but only have it work hard as needed. Something like this www.daviescraig.com.au/newproduct.html with the controller and I'd be replacing the mechanical pump with something really superior for about the cost of a pump rebuild at my local lotus dealer.

GM,

I completely understand your reasoning, and agree with it. It's your timing I don't understand. If everything is working fine at the moment, why mess with it? You say your are on a budget, who isn't? I'm not questioning the wisdom, just the timing. I'd wait til the mechanical pump fails before upgrading to the electric pump. It does provide constant flow, independent of crank speed, but, since you don't come on boost at the lower RPMs anyway, by the time your at boost producing RPMs, you have sufficient flow to adequately cool the intake charge.
The turbo is not water-cooled, it's oil cooled, so running the charge cooler has no effect on the turbo. To protect the turbo, you need an electric oil pump such as a Pre-luber which will pressurize the oil gallery and continue flow through the turbo after engine shut-down. Happy Motoring! Jim'85TE




>> Edited by lotusguy on Sunday 2nd February 19:58

[sydneyse]

I just put the EBP pump in my car two weeks ago. FANTASTIC!! Just like calvin notes, even after a hard run (and I run increased boost-1.28Kg/cm) the intercooler is cool to the touch... my engine cover above the turbo could fry an egg...

The pump is VERY easy to fit (use Andy's instructions). The hardest part was to undo the hoses from the factory pump. This is facilitated by removing the airfilter box/filter and using a hoseclamp removal tool (flexible shaft screwdriver with correct size socket for the bolt on the hoseclamp).

Wiring is even easier- ground goes to the intercooler ground and the I used the power from the positive post of the alternator.

As point of interest- when I removed the hose from the chargecooler, little bits of rubber (ie pump impeller) where floating around (also when I drained the system).

Next step would be to wire in an illuminated switch so that I can turn it off if I want as well as seeing if the circuit is complete (if the fuse blows for any reason).

I can't say I can hear the pump.... but I've got a 3" straight through exhaust... (actually even crouched over the engine bay the pump is very quiet.

I highly recommend the EBP.