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Join Date: Oct 2005
Location: MS/NH/PNW
Posts: 218
What causes this with carbs

Ok guys, I know this is kind of a dopey question, but here goes. I noticed two of the pre-atomizers on my zeniths were sort of "mushed" at the top. I figured the PO bashed them up somehow. Then I noticed on ebay a set of zeniths with exactly the same thing, but with four of the atomizers. Here's the pic:



So my question is this: what causes this deformation? Physical abuse? Carb fire? (they almost look melted), act of God?
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Stephen
GruppeB #906
1970 911T
Old 03-03-2006, 10:42 PM
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Location: Portland Oregon
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Stephen:

Yessir, those things backfired (too lean or wrong timing) and they melted.

Time for new ones.
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Steve Weiner
Rennsport Systems
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(503) 244-0990
porsche@rennsportsystems.com
www.rennsportsystems.com
Old 03-03-2006, 11:52 PM
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I figured that was the case. I'm glad mine aren't as bad as the ones in the pic. Two of my atomizers are slightly bellmouthed, so I'm hoping I can replace them with good spares and leave it at that. Is it a problem of repeating backfire, or just one good spitback? Those atomizers are pretty thin, but I would think it would take some heat to completely melt the whole top of the tube. I weld aluminum on a fairly regular basis, and it takes a large heat input to have it flow easily.
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Stephen
GruppeB #906
1970 911T
Old 03-04-2006, 08:03 AM
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