Tumble valves - what are/were they
23 July 2007 | 05:46 PM
#1
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From: Stroke it baby!
Tumble valves - what are/were they
I dont have any on mine, but I used to.
Not quite sure what they are, or indeed why you would get rid of them.
Anyone care to explain
Not quite sure what they are, or indeed why you would get rid of them.
Anyone care to explain
23 July 2007 | 08:04 PM
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From: In the Flatlands of Lincolnshire
The tumble valves are fitted between the inlet manifold and the cylinder heads. Their purpose is to provide turbulence within the intake tract at low air speed to aid the suspension of the fuel, thus allowing a cleaner burn.
If you look through the website below you will find a item called the Tumble delete unit (close) and you can read more information there.
Subaru STI Performance
Hope this answers your question. Steve
If you look through the website below you will find a item called the Tumble delete unit (close) and you can read more information there.
Subaru STI Performance
Hope this answers your question. Steve
29 July 2007 | 12:29 AM
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From the research I have found on NASIOC, they only matter the first 20 seconds or so after a cold start up for emissions. After that, useless.
Last edited by dcpatters; 29 July 2007 at 12:30 AM. Reason: spelling
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