Honda K20 electric Waterpump kit

Description

This is our Honda K20 electric waterpump kit that we developed for our own engine as current ones on the market were not suitable for our application as we have very little engine bay space

We wanted to design a more compact offering than existing kits but also have the provision to have multiple sensors installed,

this has enabled us to run water temperature and pressure sensors without any extra pipework with 1/8 npt threads

Our kit is the only one on the market that has sensor provisions

It took us a while to choose the correct alternator for the application as we wanted to design a strong mounting solution.

We use a 90 amp alternator for our kits,We do not use the standard K20 alternator as fitted to the k20a2 engine as it is too big and bulky.

 

This waterpump kit has been designed around using the pierburg cwa 200/400 waterpumps as these have a larger inlet

It features a full bore water flow with a radiused blend at the engine side ensuring a smooth transition

The breather port is 3/8 Npt to enable a wide range of adaptors to fit any installation

O ringed sealed to the block for a water tight connection

 

This is an ideal kit for kswap conversions as it doesnt need alot of space

The kit will run without a thermostat

If you want to run a heater hose output it has to be connected in between the waterplate and electric waterpump

*Please note*

The water temperature and pressure sensors do not come with the kit, the were bought seperately from KA Sensors in the uk

It is using a standard Npt1 temperature sensor

The coolant pressure sensor is an Asl

 

Parts included:-

Waterplate

Alternator pulley

Alternator belt

Alternator adjuster

All bolts

The only extras needed are:-

Alternator – K20 one is too big – Information is supplied upon purchase

Pierburg cwa waterpump

Ecu controlled Pwm output or tecomotive controller

 

 

Current of the cwa400 water pump

45% duty = 4amps
We have tweaked our water setup so we estimate the maximum pump speed could be 50-60%now

Water temperature averages 85-90℃ * depending on size of rad used
The testing of this has been using a full size rad

The crankshaft pulley used was RRC type,usually found on the FD2 civic – 13810-RRC-003
There are a few different crankshaft pulleys available for these engines