On a 302 block, I have Weber IDF’s. Unfortunately, the vacuum created by the Webers is leading to a sticky throttle. The foot pedal was modified to bring the cable connection as close the pivot point as practicable, and the bellcrank was extended slightly with a bracket to increase the leverage. Both were sufficient to get the car through its recent IVA, but the throttle is still resistant especially at the beginning of the travel. As the resistance is worse at the start of pedal travel, looking at the attached photo, my belief is that this is due to the initial angle of pull on the bellcrank (I have checked the foot pedal movement and the inner cable and there are no restrictions there).
I was thinking of replacing the bellcrank with a pulley so that the cable pull is always at 90deg to the fulcrum, however, I am concerned that if I unbolt the bellcrank, it may release the captive nut below it into the manifold. Since I did not fit the Webers myself, I do not know how the bellcrank centre bolt is secured into the manifold. Can it simply be unbolted in place without risk of losing the lower captive nut? Any advise from other IDF owners appreciated.
Also, I am sure that my problem is not unusual and I would imagine others out there have experienced the similar problems with a sticky throttle. Any suggestions or ideas from other owners that have had these same problems would be greatly appreciated.
Thanks in advance
Ian
I was thinking of replacing the bellcrank with a pulley so that the cable pull is always at 90deg to the fulcrum, however, I am concerned that if I unbolt the bellcrank, it may release the captive nut below it into the manifold. Since I did not fit the Webers myself, I do not know how the bellcrank centre bolt is secured into the manifold. Can it simply be unbolted in place without risk of losing the lower captive nut? Any advise from other IDF owners appreciated.
Also, I am sure that my problem is not unusual and I would imagine others out there have experienced the similar problems with a sticky throttle. Any suggestions or ideas from other owners that have had these same problems would be greatly appreciated.
Thanks in advance
Ian