4.0 ohv intake porting - Ranger-Forums - The Ultimate Ford Ranger Resource

4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 12-20-2008
ringer4x4's Avatar
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4.0 ohv intake porting

anyone else on this site try this? finally picked up a spare manifold to try it on, it appears to have alot of room for improvement though probably have to do heads as well to see max improvement, though not as excited to try that as more expensive..cost of spare heads to minimize down time, need new head bolts, gaskets,etc
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Old 12-21-2008
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Just an FYI. Match the runners to your heads intake port. Have each runner funnel down to that matching shape.

My 06 has a plastic intake and there is no way to port it easily. Besides above 5800-6000 and the bottom end harmonics are *dirty*.

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