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will slp underdrive pulley cause less voltage&cooling?

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Old 09-21-2007, 03:21 PM
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Default will slp underdrive pulley cause less voltage&cooling?

Im having a little higher coolant temps with my new turbo setup up. Im running a 25% underdrive pulley. Would putting the stocker back on help out alittle with coolant temps?
Old 09-21-2007, 04:19 PM
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Yup, it slows your pump down.. Mines runs a little warmer as well, nothing above 210 though in the summer.
Old 09-21-2007, 04:30 PM
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The fans blow the same speed, and come on at the same coolant temperature. The rate of flow will be decreased, but the coolant it will spend more time in the radiator releasing heat.

This is basically an "I don't know" answer.
Old 09-21-2007, 04:37 PM
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I say YES to both.
Old 09-21-2007, 04:38 PM
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Originally Posted by Hilton
The fans blow the same speed, and come on at the same coolant temperature. The rate of flow will be decreased, but the coolant it will spend more time in the radiator releasing heat.

This is basically an "I don't know" answer.
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that's sig material right there.
Old 09-21-2007, 07:13 PM
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I think im going to try the stocker and see what happens
Old 09-21-2007, 07:46 PM
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Before you go to all that effort, what radiator are you running? If it is the stocker, I'd lean towards that since it can barely keep up with a mildly modded LS1...
Old 09-21-2007, 07:47 PM
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Ive never heard that a stock radiator cant keep up with even a highly modified ls1.
Old 09-21-2007, 07:49 PM
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Originally Posted by SPRAYED 01
Ive never heard that a stock radiator cant keep up with even a highly modified ls1.
Is that sarcasm? I can't really tell tonight...my brain is half off right now.
Old 09-21-2007, 08:09 PM
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No not at all, i know of plenty of guys running high hp ls1s with stock radiators
Old 09-21-2007, 08:15 PM
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My dealer says my SLP under-drive pulley causes lower voltage, but my speed shop says I still get 12+ volts.

I do like my electric water pump and 160 degree thermostat.
Old 09-22-2007, 12:27 PM
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Originally Posted by SPRAYED 01
No not at all, i know of plenty of guys running high hp ls1s with stock radiators
And they can probably get away with it provided that there is enough airflow going through it and it is in good working condition. Honestly, I think replacing the pulley would only serve to chip away at a larger problem...the stock radiator was designed just for that purpose...stock performance. Beyond that, all bets are off.




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