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pittdawg
Dodge Dakota
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7/29/2002
13:46:42

Subject: ho conversion and higher octane
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Why does the HO 4.7 require atleast 91 octane, does it have anything to do with the cams, is it just the higher compression, or everything together? Considering the cams but dont want to have to always run 91...



CW
GenIII
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7/29/2002
14:39:59

RE: ho conversion and higher octane
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Higher compression different spark timing.

2001 4.7HO RC 5sp 3.92 LSD

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Glenn
Dodge Dakota
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7/29/2002
16:02:06

RE: ho conversion and higher octane
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I have had my HO cams in for 1500 miles now and have had no problems with 87 octane. This is the first I have heard of having to run higher octane. Does this change if you do the manifold as well?

Glenn



alex
Dodge Dakota
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7/29/2002
17:11:52

RE: ho conversion and higher octane
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You don't have to run higher octane with the HO parts unless you added the HO pistons and have a computer flash. Otherwise, 87 octane is fine.



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