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Firing Order Diagram

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Old Jun 30, 2014 | 06:33 PM
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Default Firing Order Diagram

Looking for a diagram of the firing order for a 79
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Old Jun 30, 2014 | 06:58 PM
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I don't know who's pic this is but it's good. #1 is on the left front of the engine and #2 is on the right front.

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Old Jun 30, 2014 | 07:14 PM
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Old Jul 1, 2014 | 12:16 AM
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The order is 1-8-4-3-6-5-7-2 in the clockwise direction looking down at the top of the distributor. But, the #1 plug wire can be made to work in ANY one of the available positions. Also, there are some camshafts that are made with a 1-8-7-3-6-5-4-2 order (supposed to run a bit smoother and make a smidgen more power).

To know where the #1 plug wire should be placed, find the compression stroke TDC for the left-front cylinder and see where the distributor rotor points. The #1 plug wire should be placed in that [respective] location on the distributor cap.

Last edited by 7T1vette; Jul 1, 2014 at 07:04 AM.
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Old Jul 1, 2014 | 09:36 AM
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Originally Posted by 7T1vette
The order is 1-8-4-3-6-5-7-2 in the clockwise direction looking down at the top of the distributor. But, the #1 plug wire can be made to work in ANY one of the available positions. Also, there are some camshafts that are made with a 1-8-7-3-6-5-4-2 order (supposed to run a bit smoother and make a smidgen more power).

To know where the #1 plug wire should be placed, find the compression stroke TDC for the left-front cylinder and see where the distributor rotor points. The #1 plug wire should be placed in that [respective] location on the distributor cap.
I never heard that, and not saying you are wrong, just wondering how that would play out with the timing in regaurds to the crank position?
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Old Jul 1, 2014 | 09:58 AM
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I think it swaps the compression/exhaust stroke with the 4/7 cylinder - the piston is in the same position during the rotation.
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Old Jul 1, 2014 | 09:59 AM
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Originally Posted by SCHOONS
Looking for a diagram of the firing order for a 79
FYI- they're the same for ANY small block chevy. Like, you could have totally googled this:

https://www.google.ca/?gfe_rd=cr&ei=...c+firing+order

Feed a man a fish...
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Old Jul 1, 2014 | 10:57 AM
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Originally Posted by davidchristopher
FYI- they're the same for ANY small block chevy. Like, you could have totally googled this:

https://www.google.ca/?gfe_rd=cr&ei=...c+firing+order

Feed a man a fish...
If you are building a perfectly built big block engine and have a single plane intake matched perfect to the heads you may gain a few ponies across the board.

I have never heard any evidence of power gain for a 350ci small block chevy.
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Old Jul 1, 2014 | 01:01 PM
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Originally Posted by hardlanding
I never heard that, and not saying you are wrong, just wondering how that would play out with the timing in regaurds to the crank position?
You have to have a 7-4 swap cam in order to do this - you can't just swap the plug wires. I'm running a 7/4 swap cam in my 407 '64, and it runs exceptionally well. I've written the new firing order on my intake manifold so I don't forget about it when I do my valve lash setp: thumbs:

Lars
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