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Old 07-23-2010, 07:33 PM   #42 (permalink)
comptiger5000
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Join Date: Feb 2010
Location: CT, USA
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RaceJeep - '98 Jeep Grand Cherokee (ZJ) 5.9 Limited
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If the cam is lumpy, it is often set up for high RPM power. However, an RV cam is usually meant for low end. Do you know what RPM range it's set up for?

3.90 gearing would probably be a good compromise, and might be enough to get the engine closer to its powerband, improving mpg.
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