How Are CYlinders Numbered?
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 6,269
Likes: 1
From: Richmond Ca
How Are CYlinders Numbered?
Can anyone tell me how the engine cylinders are numbered.
Which is number 1, Number 2, ect.
Is the numbering scheme (which is 1, & which is 2, ect.) the same for all vehicles and engines, or do different manufacturers use different numbering sequences?
Thanks!
Which is number 1, Number 2, ect.
Is the numbering scheme (which is 1, & which is 2, ect.) the same for all vehicles and engines, or do different manufacturers use different numbering sequences?
Thanks!
Team Owner
Joined: May 2001
Posts: 36,836
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by Patches
Driver's side front to rear is 1, 3, 5, 7.
Passenger's side front to rear is 2, 4, 6, 8.
Firing order - 1-8-7-2-6-5-4-3
Passenger's side front to rear is 2, 4, 6, 8.
Firing order - 1-8-7-2-6-5-4-3
And this is a change from the firing sequence that was used for many many years by most, if not all, the GM divisions. It used to be 1-8-4-3-6-5-7-2. 
Le Mans Master
Joined: Sep 2004
Posts: 5,707
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From: Los Angeles
Originally Posted by LoneStarFRC
And this is a change from the firing sequence that was used for many many years by most, if not all, the GM divisions. It used to be 1-8-4-3-6-5-7-2. This is true and I've always been curious as to why they changed it? Does anybody have an understanding of the technical reasons they would have done this?
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Instructor
Joined: Nov 2004
Posts: 119
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From: San Diego CA
Originally Posted by Chalky'sC5
I think one of the reasons was to smooth out the engine at idle.
• The Gen III firing order has been revised from 1-8-4-3-6-5-7-2 to 1-8-7-2-6-5-4-3. Note that the pairings 1-8, 4-3, 6-5, and 7-2 remain the same, but the pairing order is different for reduced vibration.
