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DennisV

Aug 19 2022, 11:25 AM

As I was checking the availability and price of Weber IDTP carbs for our 914-6, I discovered a very subtle distinction in a pair I saw for sale. If I have this right, the 914-6 part number adds a "1" after IDTP, whereas the 911T does not. So
914-6 70-76

40 IDTP 13 C1 - 901.108.115.00
40 IDTP 13 C - 901.108.126.01

911T 69-

40 IDTP 3 C1 (left 911) - 901.108.118.01
40 IDTP 3 C (right 911) - 901.108.118.01

So now I'm curious if there are any difference in these other than the number, and if they can safely be mixed and matched.

DennisV

Aug 19 2022, 12:43 PM

The 914-6 vs 911T front / back and left to right was getting hard for me to keep straight. I created this graphic to help keep my sanity. Maybe it will help someone else down the line.
Click to view attachment
The graphic I included in this post originally was incorrect with regards to the position of the throttle linkage. They are not opposite end of the carb on 914-6. Per Paul Abbot from Performance Oriented:

QUOTE

The Webers themselves look identical from IDTP to IDTP1, the only real difference is the location of the main fuel jet installation. The main fuel jet location for the middle barrel is towards the front of the car so for 914/6 the location of the main fuel jet is relocated from that of the 911, nothing more that that and a part number difference.

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