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safe
Joined: 18 Mar 2017
Posts: 698
Location: Sweden
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 Posted: Mon Mar 03, 2025 11:13 pm Post subject: NA head with air injection exhaust? |
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Did some engines, I guess US/California engines, come with an air pump that injected air into the exhaust ports?
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/Magnus, Stockholm Sweden
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Porsche 924 -79 NA, EFI and Turbo.
Porsche 931 -79
Porsche 911 -77, 3.2 Targa
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Cedric
Joined: 27 Aug 2004
Posts: 2801
Location: Sweden
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| Posted: Tue Mar 04, 2025 1:45 am Post subject: Re: NA head with air injection exhaust? |
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| safe wrote: | | Did some engines, I guess US/California engines, come with an air pump that injected air into the exhaust ports? |
Searching this board results in several threads around this subject, and how to get rid of the air pump etc 
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safe
Joined: 18 Mar 2017
Posts: 698
Location: Sweden
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| Posted: Tue Mar 04, 2025 1:57 am Post subject: Re: NA head with air injection exhaust? |
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| Cedric wrote: | | safe wrote: | | Did some engines, I guess US/California engines, come with an air pump that injected air into the exhaust ports? |
Searching this board results in several threads around this subject, and how to get rid of the air pump etc |
Yeah, found it too. But as you said, the ports could be used for something much cooler than emission control.... if they are big enough...
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/Magnus, Stockholm Sweden
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Porsche 924 -79 NA, EFI and Turbo.
Porsche 931 -79
Porsche 911 -77, 3.2 Targa
Porsche 911 -69, 3.6, Coupe |
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924RACR
Joined: 29 Jul 2001
Posts: 9061
Location: Royal Oak, MI, USA
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| Posted: Tue Mar 04, 2025 5:00 am Post subject: |
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Yeah, they did... stupid things...
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'79 924 #77 SCCA H Prod racecar
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Cedric
Joined: 27 Aug 2004
Posts: 2801
Location: Sweden
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| Posted: Tue Mar 04, 2025 7:16 am Post subject: |
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Well, they really could possibly be used for silly stuff, who knows
Toyota WRC celica anti lag system 
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1980 924 Turbo
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safe
Joined: 18 Mar 2017
Posts: 698
Location: Sweden
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| Posted: Tue Mar 04, 2025 5:21 pm Post subject: |
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| 924RACR wrote: | | Yeah, they did... stupid things... |
Nothing even stupider like even smaller valves and ports?
They did that to the 911.
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/Magnus, Stockholm Sweden
=======================
Porsche 924 -79 NA, EFI and Turbo.
Porsche 931 -79
Porsche 911 -77, 3.2 Targa
Porsche 911 -69, 3.6, Coupe |
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