You have the wrong impression of the towers function. If you were to look at the original K-jet airflow meters you would find a small screw where the tower now sits. To make the adjustment the airfilter must be removed, the screwed pulled out and then an allen wrench is inserted through the hole. All this time false air was also entering through the hole. One had to adjust then cover the hole with ones finger till the mixture was stable and then do it again until the adjustment was correct.

The tower is just a tool. It performs no function except in adjusting the mixture. With the tower (and no anti-tamper plug) the adjustment can be made without removing the airfilter and without false air being introduced.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician