 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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| 914_teener |
Aug 15 2024, 12:29 PM
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#2
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914 Guru Group: Members Posts: 5,264 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
QUOTE(Highland @ Aug 14 2024, 04:07 PM)  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? Last question no it does not tell you about idle mixture. A CO meter will. |
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| Highland |
Aug 15 2024, 02:06 PM
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#3
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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 |
Last question no it does not tell you about idle mixture. A CO meter will. [/quote] What is ideal CO for stock 2L Type 4? If the product of combustion is CO2 and H2O, is a CO a result of not enough O2 or a rich mixture? |
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Posts in this topic
Highland Basic Engine Questions Aug 14 2024, 05:07 PM
Ron914
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Superhawk996
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