[Steve C.]

What Larry said...

"A lot of builders shy away from the lockup converter on these types of TV cable transmissions mainly because of the way it's activated. Usually electric solenoid via vacuum switch or one of the two. Very hard to adjust them to engage exactly where you want, and behind an engine with a bumpy camshaft can cause chugging when engaged at an inopportune time. Some of the vacuum switches can be tweaked with a small adjustment screw but the range is very limited."

At the time I had a lock-up converter installed the cam was either a 260 or 255 @ .050" solid roller with 0.701" or 0.709" lift and a 110 LSA, I don't remember which now. It was "bumpy". That can lead to issues Larry eludes to.

Much will depend on the overall combination but for me personally with bigger cams and anywhere from 635-660 HP the best thing we did early on was to change to a non lock up converter on my 2004R transmission.
That and a proper TV cable hook up.

My non-lock up converter was built by Continental and purchased thru Cliff Ruggles. It is well coupled out on the open highway with about a 200 rpm slippage. The transmission has been in service for almost 12 years.


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