Booster water pump.

[layada]

Does anyone have experience with in-line booster water pumps; supposedly they increase flow at low engine rpms (how does the water get past the mechanical pump?)and they are simple to fit.

Stewart Components do one of these boosters. Meziere dont mention one but, I like the look of their kit and wonder if any type can be used as such.

I already have a high flow mechanical pump (fitted as standard by AS) and dont really want to completely replace the mechanical one with an electric item.

Adam

[gtr-gaz]

Didn't Stig try one of those on his GTR, or was that an ordinary electric pump? Can't remember, but whatever he used it wasn't successful!

Check out his build site

[CanAm Dave]

Hi Adam

Stig used a Davies Craig pump. I am also fitting one to my Can-Am. They are simple enough to fit. They fit into the return feed from the rad to the engine. I am mainly fitting one to avoid head soak after the engine is shut down. The electric pump will run on after shut down. The instructions say they can pump through each other. I'm not sure how Stig set his up but I will run mine in a bypass pipe so not to cause a restriction when at high rpm. The mechanical pumps are very efficient at high revs but not so at low rpm.

Regards Dave

[cortina1]

I have a Davis Craig thats straight routed in the system, fitted originally for overheating reasons, but this seems to have been primarily fixed by uprating rad fans to Pacet units. Have maintained the electric water pump and occasionally kick in if temp gauge rising while paking up or sitting in traffic- seems to work well under these conditions. However I have done nearly naff all miles this year so could say this is a proven pump....and certainly when I was looking for feedback on electric pumps a while ago, this one did not work for Stig.

[layada]

CanAm Dave said:

Hi Adam I'm not sure how Stig set his up but I will run mine in a bypass pipe so not to cause a restriction when at high rpm. The mechanical pumps are very efficient at high revs but not so at low rpm. Regards Dave

Thanks Dave, I'm interested your bypass arrangement.

Will you put a one-way (check) valve in the hose from the rad and then 'Tee' in the electric pump around this?

I'm guessing a check valve would allow a free flow from the rad to the mechanical pump at high revs (essentially bypassing the electric pump). However, at low rpms it would prevent the electric pump from 'back pumping' water around its own tee system.

With a check valve set up, I'd imagine it would be possible to use any type/make of electric pump.

Adam

>> Edited by layada on Wednesday 17th May 18:31

[splatspeed]

Hi

i have aquired from the us a water pump that fits in the space of the mechanical water pump

so replacement becomes easy

Sean

[splatspeed]

electric pump just to clarify

sean

[stig]

CanAm Dave said:

Hi Adam Stig used a Davies Craig pump. I am also fitting one to my Can-Am. They are simple enough to fit. They fit into the return feed from the rad to the engine. I am mainly fitting one to avoid head soak after the engine is shut down. The electric pump will run on after shut down. The instructions say they can pump through each other. I'm not sure how Stig set his up but I will run mine in a bypass pipe so not to cause a restriction when at high rpm. The mechanical pumps are very efficient at high revs but not so at low rpm. Regards Dave

Yup, I ran one and it's best to do it with a bypass.

It didn't do the trick for me though and after I'd removed it to install in my racing seven, it failed very quickly.

[v8owner]

I used a davies craig pump on my last kit. again not wanting heat soak, I used a timed relay i bought from rs supplies which allowed you to specify the time you wished the relay to remain on after the ignition was switched off.. I also fed the fan relay though it, meaning the car would cool itself as required once the ignition was turned off.