any tips for tuning weber 34ict? Options

[JOE M]

Curious about how to set the carbs up.The timing is close but may be out slightly.I started by turning the air mixture screws all the way in and than backing both off by 2 1/2 turns to start. I let the car idle and than I move 1 side until the car runs rough than back off the other way about 1/2 turn.I did the same for the other side. It runs ok but pops through the exhaust every now and than.It gets better when I take the throtle linkage off.I think my biggest problem is seting the idle speed screw. Is there something I should do prior to starting any other alignment?I read the procedure but I am stumped. What typically causes it to pop through the exhaust?I did check the vacum on both sides and they are real close ( within 1 of each other).

[hi4head]

I installed a set of the Weber 34 ICT's last year and have been pleased with them overall. (Especially since the car is now back on the road.)

There is a fairly good set of instructions at http://www.cbperformance.com/weberict.asp

On mine, I did run a balance line to connect the barbs on the two manifolds. Also, I ran a vacuum line from one carb to the vacuum advance. On the retard side (?) of the vaccum, I ran a short line and plugged it with a golf tee.


Also, don't forget about possibly needing to swap out some of the jets. I have the ICT's installed on my 2 liter. I would guess that your set up should be different than mine. Mine came equipped with 1.30 for the main jets; I am running well with 1.35. The idle jet was a .52 and now I run with .60.

The biggest issues that I had was balancing the airflow and getting the right jets. With the stock jets, the carbs ran way too lean for my car.
There are good articles on jetting at aircooled.net .

I have more pictures available of my setup if needed.

Regards,

Chris