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Discussion Starter #1
The 302 and the 302HO have different firing orders. I know what they are, but don't know why. Can someone explain? Reason I ask is that my HO had a cracked block; bought a FMS 302 short block and it never occured to me to change firing order.

[ July 16, 2005, 07:18 PM: Message edited by: Dale ]
 

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They made it the same as the 351 to reduce the stress on the front main bearing. The old firing order fires 1 and then 5.

Bill G
 

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Discussion Starter #5
So, its the cam. Thanks, Jeff.

So, with my E303 cam, the HO firing order is correct?
 

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Discussion Starter #7
OK, one down. Thanks.
 

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BILL G.
Is the winner and gets a 351C/M Dist. for his 351W.
Thats the reason of the 1-3 vs 1-5 firing orders. Now take a CHEV sbc order 1-8-4-3-6-5-7-2 with even # on the driver side. Not much stress on the front of the crankshaft.
 

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I suppose it's not really important to the post, but I have to make a small correction. The Chevy firing order is actually identical to the non-HO 302. Chevy just numbers cylinders differently than Ford... The front two cylinders fire one right after the other... CHEV#2 then CHEV#1.

Chev# = Ford#
1 = 5
2 = 1
3 = 6
4 = 2
5 = 7
6 = 3
7 = 8
8 = 4

Chevy Firing order: 1 8 4 3 6 5 7 2
Translated to Ford nubmering: 5 4 2 6 3 7 8 1
Shifted to show #1 first: 1 5 4 2 6 3 7 8
There's the Ford non-HO 302 firing order...
 

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Arachnyd: Your correcT about the SBC. We run the 302 cam for years till they got cheaper. The stress was FORD ideal .
 
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