Electric waterpumps - pressure important?

[DEVONMAN]

Hi sidecar.

My engine is out of the car at the moment but if no one does it before me I will do the pressure gauge test when the engine is active again. I can easily put a tee/gauge into the 8mm water pipes to the turbos.
This will be alot less messy than my idea if removing the heater hose

I suppose the sequence of the test will be:-

-Check pressure at various revs from cold ( stat closed)
-Pinch the various bypass/heater hoses and turbo hoses and note difference.
-Check pressure at various revs when hot (stat open)
-Pinch the various bypass/ heater hoses and turbo hoses and note the difference.

This should give some indication of change in block pressure against pump speed.
Naturally the cap pressure will need to be allowed for in the hot case.

Not sure when I can do this as currently I am installing a 6 speed T56 box to the RV8 and still have the rear mount, tunnel and prop to sort out.

Cheers Denis

[sidecar]

Hi sidecar.

My engine is out of the car at the moment but if no one does it before me I will do the pressure gauge test when the engine is active again. I can easily put a tee/gauge into the 8mm water pipes to the turbos.
This will be alot less messy than my idea if removing the heater hose

I suppose the sequence of the test will be:-

-Check pressure at various revs from cold ( stat closed)
-Pinch the various bypass/heater hoses and turbo hoses and note difference.
-Check pressure at various revs when hot (stat open)
-Pinch the various bypass/ heater hoses and turbo hoses and note the difference.

This should give some indication of change in block pressure against pump speed.
Naturally the cap pressure will need to be allowed for in the hot case.

Not sure when I can do this as currently I am installing a 6 speed T56 box to the RV8 and still have the rear mount, tunnel and prop to sort out.

Cheers Denis

Hi Denis,

Sounds like the engine that you are building is going to be a good one!

With regards to the pressure test, that would tell us one way or the other, I can only quote what I have read but your analogy with what goes on inside a kettle makes sense to me.

Regards,

Pete