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Alan L's Avatar
 
Join Date: Apr 2006
Location: New Zealand
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Rubber sensor plate stopper gap

Next time someone is poking around in their air intake system, could they have a look at the gap between the bolt head on the air plate, and the rubber stopper.
I received one from Pelican, and there seems only 1 part No, but I have a 10 mm gap between the two. Which seems a bit pointless.
Can't work it out.
Thanks
Alan
Old 01-13-2008, 07:37 PM
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Alan, I will take a look at this one in my garage when I next go in there.

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Old 01-14-2008, 11:14 AM
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I'm not even sure why it's there (the rubber stopper) as the plate doesn't come close to it.
Old 01-14-2008, 05:03 PM
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Wonder what it is supposed to do then - Nathans seems to have a gap too - but hard to tell from pic.
Weird - not really like Porsche to build in redundant bits.
Something to do with a backfire perhaps - I presumed it was to help stabilise the plate from flutter.
Alan
Old 01-16-2008, 08:49 PM
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I think it compliments the air horn that's in the air filter housing. It may have been designed that way to direct air flow to the outer circumference of the air metering plate.
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Old 01-17-2008, 07:25 AM
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In the picture below posted by A930Rocket in another post, it sure looks like the plate is touching the stopper.
Old 01-17-2008, 03:52 PM
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I would have expected it too, if it was going to serve the obvious purpose. But the plot thickens. In Nathans pic, it 'appears' not to (the plate appears fully shut). In my situation I have a significant gap, and in A930Rockets post, there is a gap (but in the pic the plate appears open by about 1 mm)..
What I can't figure out is how it is supposed to just touch to be useful, without any meaning- ful way of adjusting it to do so. If it pushed the air plate down by an extra mm, you would have some serious idle/tuning issues. If it sits high by a mm, it would appear redundant, as at full shut the air plate seems to 'bottom out' on the housing.
I am perplexed to say the least. To fit mine in the present config seems pointless, and best forgotten. But properly fitted, I suspect it would help alleviate the plate flutter at idle - which is about the only use I can imagine for it. But my 10mm gap seems to big to compensate for.
At rest, my plate sits fully shut against the housing. Maybe the stopper is theoretically supposed to hold the plate open by about 1mm, in the idle position. In which case it would prevent any violent shutting action. Shutting right off may set up a choking/oscillating action in the engine? But you might have expected some way to adjust for this fine setting?
Alan
Old 01-17-2008, 04:27 PM
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