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post #1 of (permalink) Old 11-17-2002, 09:59 PM Thread Starter
 
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R.V. cam for 258/4.2?

I'm thinking on getting an R.V. cam for my 4.2 but I would like to hear what results others have had on fuel mileage and power.Thanks in advance.
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post #2 of (permalink) Old 11-18-2002, 01:48 PM
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Re: R.V. cam for 258/4.2?

I assume that you are referring to a cam that will make better power at lower rpm. What you should look for is a cam with more lift, without much change in duration from stock. Mopar actually has several good grinds in the performance rock. Be careful about comparing #'s between different manufacturers, the numbers usually aren't directly comparable.
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post #3 of (permalink) Old 11-18-2002, 02:09 PM
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Re: R.V. cam for 258/4.2?

I put a COMP cam in my 258 and have really been impressed. I used part number 68-201-4. It has advertised duration of 260 (@0.050" 212) with a valve lift of 0.447. It makes good power and has a good idle. little burp under 1k rpm, but livable.
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post #4 of (permalink) Old 11-18-2002, 04:24 PM
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Re: R.V. cam for 258/4.2?

I put a Clay Smith cam in mine. Search the web. They will do a custom grind. It's $$$$ but you get what you pay for!! [img]images/graemlins/wink.gif[/img] If your worried about it have them grind you one. My motor has got a few other mods but it runs like a scalded dog and I attribute most of it to the cam being dang near perfect. I'll have to get the exact specs on it if you are interested. In fact I'd consider it more than perfect. I can't tell you how impressed I am with it.... they nailed mine.

For what it's worth ...... my 2 cents


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