 Basic Engine Questions, Firing Order and Water Out the Tailpipe |
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| Highland |
 Aug 14 2024, 05:07 PM
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#1
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Senior Member  Group: Members Posts: 542 Joined: 8-August 11 From: San Diego, CA Member No.: 13,418 Region Association: Southern California  |
Wondering what the firing order isn't 1-4-2-3 instead of the actual 1-4-3-2. Wouldn't it make more sense to go back and forth between opposing sides? Would the engine sound smoother with 1-4-2-3?
I happen to be by my tailpipe when my engine transitioned from cold idle (~1800 rpm) to warm idle (~1000 rpm). When the rpm dropped water sputtered out the tail pipe and continued compared to dry exhaust while cold idle. I know water is a product of combustion, but does this tell me anything about running to rich or lean at these idle conditions? |
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| 914werke |
Aug 15 2024, 10:46 AM
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#2
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"I got blisters on me fingers" Group: Members Posts: 11,248 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest 
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ever wonder why the fire order on a Suby (4) is 1324
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| Superhawk996 |
Aug 15 2024, 12:44 PM
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#3
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914 Guru Group: Members Posts: 7,031 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(914werke @ Aug 15 2024, 12:46 PM)  ever wonder why the fire order on a Suby (4) is 1324 (IMG:style_emoticons/default/laugh.gif) now I'm totally confused (IMG:style_emoticons/default/av-943.gif) since Subaru cylinder number scheme is different. Regardless both are flat plane cranks, have to have 180 degrees between cylinder firing which at the end of the day, that sort of establishes the sound. Meaning, you'll never end up with a syncopated sound like you get off a V8 or a Harley. |
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| Superhawk996 |
Aug 16 2024, 08:11 AM
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#4
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914 Guru Group: Members Posts: 7,031 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(Superhawk996 @ Aug 15 2024, 02:44 PM) QUOTE(914werke @ Aug 15 2024, 12:46 PM) ever wonder why the fire order on a Suby (4) is 1324 (IMG:style_emoticons/default/laugh.gif) now I'm totally confused (IMG:style_emoticons/default/av-943.gif) since Subaru cylinder number scheme is different. This was bugging me. Looked up Subi cylinder numbering and renumbered to 914 numbering convention. Subi 1324 = 914 4321 which = 1432 (IMG:style_emoticons/default/av-943.gif) now I get it. I’m slow and not intimately familiar with Subi’s. (IMG:style_emoticons/default/happy11.gif)  |
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Posts in this topic
Highland Basic Engine Questions Aug 14 2024, 05:07 PM
Ron914
Wondering what the firing order isn't 1-4-2-3... Aug 15 2024, 10:34 AM technicalninja When you burn a gallon of gasoline you produce ALM... Aug 15 2024, 11:14 AM Superhawk996
Wouldn't it make more sense to go back and fo... Aug 15 2024, 11:46 AM 914_teener
Wondering what the firing order isn't 1-4-2-3... Aug 15 2024, 12:29 PM
Highland Last question no it does not tell you about idle m... Aug 15 2024, 02:06 PM Dave_Darling I can only speculate about the firing order--but I... Aug 15 2024, 01:31 PM 930cabman Maybe the boys in the fatherland did an eeny miny ... Aug 16 2024, 04:55 AM Superhawk996
Maybe the boys in the fatherland did an eeny miny... Aug 16 2024, 06:33 AM 73-914 How many lobes on camshaft? Only 4 , 2 intake 2 ex... Aug 16 2024, 06:33 AM 930cabman
How many lobes on camshaft? Only 4 , 2 intake 2 e... Aug 16 2024, 08:14 AM technicalninja Between the difference in 4-cylinder numbering seq... Aug 16 2024, 08:19 AM |
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