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confused about fireing order

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Charlie Daubitz

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Aug 23, 1996, 3:00:00 AM8/23/96
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Is a HO 302 fireing order the same as a 351? My new cam is for a
351so I thought it would use the 351 order but it works with the same
fireing order as my 302?


Charlie Daubitz

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Aug 23, 1996, 3:00:00 AM8/23/96
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Gordon L. Banks

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Aug 23, 1996, 3:00:00 AM8/23/96
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cd1...@airmail.net (Charlie Daubitz) wrote:

Charlie, the 302 firing order changed with the 1982 models, and since
has been the same as the 351 and 460.
Usually a cam referred to as being applicable for a 289/302 has the old
firing order (1-5-4-2-6-3-7-8) (watch the 7 & 8 wires).
In turn, a cam referred to as aplicable for the 302/351 has the new firing
order (1-3-7-2-6-5-4-8) (watch the 6 & 5 wires).
(watch the x & x wires) because these are sequential firing cylinders,
and the primary location of cross-firing between cylinders if the plug
wires are run parallel to each other.

Gordon Banks, Huntsville, AL

Timothy L. Anderson

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Aug 23, 1996, 3:00:00 AM8/23/96
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In article g...@news-f.iadfw.net, cd1...@airmail.net (Charlie Daubitz) writes:
> Is a HO 302 fireing order the same as a 351? My new cam is for a
> 351so I thought it would use the 351 order but it works with the same
> fireing order as my 302?
>


You got it backwards. The 302 HO (1982+) used the 351W firing order. Something
to do with reduced main bearing loads, if I remember correctly. The early
HO actually used a "marine" (1973 part number) camshaft until the '85 roller
cam came out.

Tim Anderson
1996 Cobra
1972 Mach 1 (429 engine swap)

Tom HIWATT

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Aug 23, 1996, 3:00:00 AM8/23/96
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221, 260, 289, pre-HO 302: 15426378

HO-5.0, 351W, 351C, 351M, 400: 13726548

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