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Pump????

General engine tech -- Drag Racing to Circle Track

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88bluestar
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Pump????

Post by 88bluestar » Wed Jun 19, 2019 12:55 pm

Which pump do you think is better?
It' an open system with no thermostat, single pass radiator running straight water.
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mag2555
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Re: Pump????

Post by mag2555 » Wed Jun 19, 2019 1:05 pm

Not sure about the pump thing, but those ribbed Hose's make for a good amount of reversion along with the turbulence also!

Kevin Johnson
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Re: Pump????

Post by Kevin Johnson » Wed Jun 19, 2019 1:29 pm

I am sure they saved a few cents per unit on the top one.

ProPower engines
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Re: Pump????

Post by ProPower engines » Wed Jun 19, 2019 6:29 pm

If an oil pump cavitates you loose pressure and volume.
water pump works 5the same basic way only its not really trying to build that much pressure.
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exhaustgases
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Re: Pump????

Post by exhaustgases » Wed Jun 19, 2019 6:32 pm

No thermostat? Are you trying to run too hot or too cold? That will depend on the ambient temp.
Which one is better? What is the country of origin :lol:

engineguyBill
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Re: Pump????

Post by engineguyBill » Wed Jun 19, 2019 10:23 pm

Thermostat should be used in order to efficiently control engine temperature. Use a low temp 'stat, 160 degree or so and drill a few small holes in it so that a limited amount of coolant will circulate during the time that it is closed. If you are not running coolant, use one of the available coolant substitutes such as Evan's products, etc. Straight water should be avoided in any automotive cooling system.

The pump on the right is probably more efficient, as the impeller fits within the pump housing much closer therefore excess coolant is not lost between impeller and housing. Also, your system will work better if you utilize the bypass hose from the pump to the intake manifold. There is no advantage to be gained by blocking this bypass. The bypass hose and the holes drilled in the thermostat allow the engine to transition from cold to operating temperature much more efficiently'

Also, remember to use good quality fan (s) and a shroud that fits closely around the fan.
Bill

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88bluestar
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Re: Pump????

Post by 88bluestar » Wed Jun 19, 2019 10:55 pm

This is for a circle track engine, we’ve found they work better minus the thermostat. The left one is a short pump while the right is a long

88bluestar
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Re: Pump????

Post by 88bluestar » Thu Jun 20, 2019 1:49 am

100 degree weather, low humidity.

RCJ
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Re: Pump????

Post by RCJ » Thu Jun 20, 2019 6:08 am

I would use the one on the right.I've made plates and spent some time getting the pumps tighter fitting ,never made much difference.I believe the heads and block limit flow not the pump.One of the biggest changes was to follow the directions on a felpro 1003 head gasket and drill holes in the block by the center exhaust ports.

88bluestar
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Re: Pump????

Post by 88bluestar » Thu Jun 20, 2019 11:10 am

1003 fel pro is what I'm using. Eq iron cylinder head.

rp930
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Re: Pump????

Post by rp930 » Thu Jun 20, 2019 11:14 am

Get a Stewart pump and run A 160 HD Autozone thermostat. Drill a couple small holes as mentioned above. Did you drill the block for the head gaskets? Made a big difference on mine.

Warp Speed
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Re: Pump????

Post by Warp Speed » Thu Jun 20, 2019 11:45 am

I would NEVER run a thermostat in a racing application.........ever!

tuffxf
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Re: Pump????

Post by tuffxf » Fri Jun 21, 2019 1:47 am

G,day Warp,
Do you mind if I ask why

Cheers
Paul

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Re: Pump????

Post by exhaustgases » Fri Jun 21, 2019 2:49 am

A thermostat is a temperature regulator of sorts, maybe why it is called what it is. So what happens without one is, there is nothing, zero, nada, to stop or hinder the flow of coolant. So unless the radiator is huge and has alot of cold air cooling it the coolant flows so fast that it does not get a chance to cool on a hot day. And on a very cold day the inverse can happen. So I'm curious why no thermostat? Actually I would think if the pump is engine driven that more HP would be used to pump the coolant than if a thermostat was in place. With blocked flow I think an impeller pump would unload, and use less power.

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Re: Pump????

Post by Krooser » Fri Jun 21, 2019 2:53 am

The one on the right.
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