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Home > Help Needed / General Tech Chat > Water pump pulleys, large or small preferable?

Prawn

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basingstoke

4th Aug, 2010 at 08:13:10am

chaps, I'm about to start a new front mounted rad setup, and whilst it's all off, I was wondering what's the preference on water pump pulleys.

I'm currently running the smaller pulley due to my previous head being skimmed so much, but the engine runs very hot with a minispares 2 core rad.

Is it preferable to run the larger pulley? it's a high revving n/a 1380 motor (8k rev limit) if that makes any odds. Would the pump be cavitating at high revs with the small pulley?

Cheers

Nick

Small pulley8 Votes 8 Votes - 0%
Large pulley4 Votes 4 Votes - 0%

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

BENROSS

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Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

5th Aug, 2010 at 11:09:13am

the smaller pump will make more flow for the same RPMs than a bigger water pump pully .......... i would stick with that






mowog

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5th Aug, 2010 at 10:30:07pm




On 4th Aug, 2010 Prawn said:
chaps, I'm about to start a new front mounted rad setup, and whilst it's all off, I was wondering what's the preference on water pump pulleys.

I'm currently running the smaller pulley due to my previous head being skimmed so much, but the engine runs very hot with a minispares 2 core rad.

Is it preferable to run the larger pulley? it's a high revving n/a 1380 motor (8k rev limit) if that makes any odds. Would the pump be cavitating at high revs with the small pulley?

Cheers

Nick


If your running with the by-pass between the head and pump, that will cause cavitation and a bigger pulley would help.

Vegard

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I pick holes in everything..

Chief ancient post excavator

Norway

5th Aug, 2010 at 11:29:54pm

Road car, small. Race car, big.

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

Joe C

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Carlos Fandango

Burnham-on-Crouch, Essex

5th Aug, 2010 at 11:56:59pm

I'm with vegards thinking,


i'd say for anything that will see idle forany length of time fit a small pulley.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/


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