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Old 06-21-2013, 12:42 AM   #1
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1991 4.0 lower max torque rpm

I need help picking a cam to lower the max torque from 4000 to a usable 1800 to 3000.

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Old 06-21-2013, 06:18 AM   #2
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check comp cams, they have a cam selector program where you enter your motor specs

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Old 06-21-2013, 06:37 AM   #3
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Pinch your exhaust pipe; a bit of back pressure will help the low end torque.
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Old 06-21-2013, 11:39 PM   #4
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Never heard of pinching the exhaust pipe. I'll try the comp cams approach and look into the other. Thanks for the answers.
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