I've been setting up my '82 245 CI [k-jet] car, and have a question for those of you in the know: The Bentley manual gives the setting for the later models, beginning with the '83. Mine is the B21F-9 CI. Are the settings the same as for the Turbo model discussed in the Bentley manual [duty cycle 49 percent]? Or are the settings different for my old car? I have both a duty-cycle meter and a dwell meter to check the setting. Any help would be appreciated. Also, the anti-tamper seal on the airflow/fuel meter [fuel distributor] was gone when I started work on it, and whoever knocked it out left a good sized hole in its place. It seems to me that this might cause a vacuum leak under high load, not to mention that the big draft would be of unfiltered air. Any ideas? Maybe there's something in the airflow meter to prevent such a vacuum bypass. In any case, when I'm all done I intend to leave the hole covered over somehow. Before I get there, I think I'll try a propane test to see if the rpm's spike when I allow propane to be drawn into the hole.

Thanks again in advance for your help!

If the adjustment hole for the air/fuel mixture is left unplugged, you'll get a little unfiltered air into the system and maybe some dirt and dust. As I understand it, though, the unplugged hole will not affect the air/fuel mixture or the metered air because the adjustment hole is before the air metering device, i.e., the air sensor plate. That's how I understand it anyway. See what others say. I recommend plugging the hole somehow to keep dirt out.
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Thanks everyone for all the help, Doug C. 81 242 Brick Off Blocks, turbo bars and wheels, M46; 86 244, B230, 150k , auto; 81 242 Turbo, intercooled, M46, 122k.

According to Haynes the duty cycle for a CIS non-turbo is 46 to 49 percent (41deg to 44deg on Dwell). Hope that helps.

Mario
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'I've always been crazy, but it's kept me from going insane' Waylon Jennings

41-44 on the dwell meter.