Question about 1995 Jeep Grand Cherokee
Putting a r/v cam in sometimes will help a bit. An r/v cam will not really give you more HP, but will move the torque curve of your engine to a more usable rpm range. Believe it or not, most of the gain you will see isn't from the cam but is from changing the timing chain which in a high mile engine is likely worn. Most engines benefit from advancing the cam a few degrees (they actually sell kits for doing that) when installing. As a chain wears, it actually retards cam phasing.
Changing anything usually is a trade-off. Moving the rpm range of the cam will add low end response but will take away high end performance. If you do not generally run the engine up to 5,000 rpm, you may not notice that though.
Changing the intake, adding headers or adding a "performance chip" all have some benefits but never really give you the "advertised" increase. As far as those chips go, they generally work up around 4-5,000 rpm's and don't add much to everyday driving (read: worthless).
In reality, the most reliable way to restore lost power in a high mile engine is to do a total rebuild or find a compatible engine with lower miles. There is no "bolt on" cure for internal wear and though the Jeep engine is a tough reliable old bird, they do wear!
Posted on Aug 30, 2010
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Posted on Jan 02, 2017
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