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Compression ratio and pulley swap question

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Old 07-18-2013, 12:58 AM
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Kadorja
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Default Compression ratio and pulley swap question

So right now with a 4.10" pulley and stock compression I'm at 550whp. The new engine will be exactly the same CID but the compression ratio will be lower (about 10:1) but I figured the blower cam will gain about 50-60whp putting me around 600whp.

I want to swap on a pulley but I don't want it to be too much for the RST clutch to handle. I've heard about .1" is 10hp. I'm stuck between a 3.6" or a 3.7" pulley. I'd like to get some good power out of the car but not overpower my brand new clutch by screwing up the math and getting too much power.

Anyone have a good guess?
Old 07-18-2013, 07:42 AM
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Slo-Poc
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Built motor with dropped cr, I would do the 3.6 and a nice cam. You can always tune it back but I doubt your clutch will know the difference in 15-20 wtq
Old 07-18-2013, 11:51 AM
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Kadorja
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Yeah I went ahead and got the 3.6" pulley. Hopefully they have it in stock and can mail it out soon. Injectors should be shipped today or tomorrow and my clutch gets in next Tuesday. I can't wait.

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