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Which water pump for boosted application?

Discussion in 'Engine Building' started by jtornado, Jan 17, 2008.

  1. jtornado

    jtornado New Member

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    I hear the LS water pump gives 131% more coolant flow than the GSR. The LS pump has a smaller gear and the Gsr has a larger gear. I heard use the ls pump if your not using a vtec and if you are using a vtec head than get a vtec pump even though the ls pump flows better to an extent. The reason the GSR pump is larger is because to reduce cavitation and its says cavitation can stop coolant flow or create bubbles, so they made the gsr pump larger to reduce cavitation. I'm not 100% sure about all this but this is what I read. Well if I were to be boosting the ls would I need the ls or gsr pump? I will not be revving as high as the gsr, only the oem spec for the ls which is 6800 but since ill be reaching my rpms faster, would I need something larger diameter gear to reduce cavitation or do I not know what im even talking about?
     
  2. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    The LS water pump will be fine unless you will be running some ridiculous HP #'s.
    If you are going to go 300-400hp you will be fine.
     
  3. dtob

    dtob New Member

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    Even at those HP levels you would still be fine.

    Don't run the GSR pump in an ls unless you plan on taking it to 8k rpm. Also don't use an ls pump in a gsr unless you don't plan on revving more than 7k.
     
  4. jtornado

    jtornado New Member

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    Cool thanks guys. Just wanted to be sure.
     
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