Changing a 302 Firing Order to Windsor - Vintage Mustang Forums
 
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post #1 of 10 (permalink) Old 03-12-2008, 10:36 AM Thread Starter
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Hey all.

Ive been looking around for a cam recently for my engine, and I called Comp Cams "CamHelp" line and one of the questions the gentleman asked me was if I wanted the standard firing order or the Windsor firing order. I understand the difference but has anyone done it and recommend it? he said its smoother and will increase power a little. Ive been searching and all I really found was this quote from a website...

"A stock 351 Windsor cam was a popular low-buck performance gainer for 289 and 302 engines once upon a time. It smoothed out the engine and gave a better feel throughout the useable rpm range." (http://www.jalopyjournal.com/forum/a...hp/t-1525.html) ..the source.

Thanks for any help, and as always any insight is appreciated.
-Sean K.

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post #2 of 10 (permalink) Old 03-12-2008, 11:03 AM
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well ford did just that when they went to the roller cammed engines in 1985. remember they had a reason for doing it too.

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post #3 of 10 (permalink) Old 03-12-2008, 11:03 AM
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I don't think it makes much difference either way.


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post #4 of 10 (permalink) Old 03-12-2008, 11:19 AM
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i was always told that the 351w reduces the load on the front of the crank snout because the firing order is not 1-5 like on a 302 engine. not sure how much merit this carrys but it always sounded like a good enough reason.
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post #5 of 10 (permalink) Old 03-12-2008, 06:02 PM
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I did it on my smallblock. The difference is not noticeable but by the same token, I can say that there are no detrimental effects from doing it, either.

Just make sure whenever someone else works on the car, that they are aware of the change.

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post #6 of 10 (permalink) Old 03-12-2008, 08:37 PM
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Quote:
Originally Posted by RTM
i was always told that the 351w reduces the load on the front of the crank snout because the firing order is not 1-5 like on a 302 engine. not sure how much merit this carrys but it always sounded like a good enough reason.
It is my understanding that this is why Ford changed the firing order ... better bearing life.

I doubt it makes any difference in performance or idle quality. If it does, you'd need a dyno to tell the difference.

The only real draw back to going to the 351w firing order, is that your plug wires won't fit any more. If you're replacing plug wires, though, there's really no reason not to go to the newer firing order.

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post #7 of 10 (permalink) Old 03-12-2008, 08:40 PM
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I have the 351 firing order in my 289, no problems for me.

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post #8 of 10 (permalink) Old 03-12-2008, 10:26 PM
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This is the same thing that the Chevy guys call a 4/7 swap. The 4/7 swap turns the standard Gen I SBC firing order of 1-8-4-3-6-5-7-2 to the Gen III (LSx) firing order of 1-8-7-3-6-5-4-2 -- the no. 4 and the no. 7 change places. (Keep in mind GM numbers the cylinders 2-4-6-8 on the passenger side and 1-3-5-7 on the driver side.)

Here's a Hot Rod magazine story on a side-by-side comparison.

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post #9 of 10 (permalink) Old 03-12-2008, 10:32 PM
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+1 on what Johnpro said. It will give you better bearing life.

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post #10 of 10 (permalink) Old 03-13-2008, 07:14 PM
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I built a 302 a couple of years ago and put in the 351W cam and it seem to me the motor twisted up to higher RPM faster and was smoother. I just built another 302 and put in a 351 W cam. Haven't stated yet but sure I will be happy. Jim


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