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Registered
Join Date: Feb 2008
Location: Knoxville, Tn
Posts: 808
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Weber serial number questions
I have a few questions about the serial numbers on the webers. I have two setups, one set are 40IDA 3c1's and the others are 40IDTr 3c1's. What is the difference in these two setups? I have looked at a couple of Weber books and cant find the IDT's. I am guessing they are later manufactured carbs? Also any sugestions on venturis, chokes and jets for a euro '80 911sc? thanks guys i appreciate it.
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07-25-2008, 06:32 AM
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Registered
Join Date: Jul 2001
Location: Thunder Bay, ON
Posts: 4,551
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For all intents and purposes, IDA and IDT carbs are the same. The IDT carbs were fit on the '68 and '69 911T models and had a different idle mixture screw setup (to assist with emissions I believe)
That said, venturies, jets, and emulsion tubes are all interchangeable between 3bbl IDA, IDS and IDT carbs. Regards, Andrew M
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1970 911E - track / weekend car 1970 911S - under restoration 1986 930 Slant Nose - fun car |
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07-25-2008, 08:59 AM
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Registered
Join Date: Oct 2002
Location: Minneapolis
Posts: 775
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Webber 40's
Andrew is correct, the three barrel 40 carbs are virtually interchangable when used other than on the original cars.
The IDT's (1968 I believe) have a pair of vacuum ports on the manifolds for US emmissons - which are just plugged if used on other engines. Bob |
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07-25-2008, 09:27 AM
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