Quote:
Originally Posted by ertech
I have studied all that is writen here and still do not know what it does beside cold idle .what else is it good for ,
my car is a little modded with exhaust ,IC and K26-7200/
Thanks
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That 'side" of the device (vacuum side) mechanically alters the distributor's moving mass to retard timing as affected by intake manifold pressure. It moves timing approximately 10 degrees positive as it looses vacuum signal.
Without it, timing at idle needs to be 10/12 degrees advance so engine can get to 28/29 deg above 3000 rpm, no load, to get power out of the fuel/engine.
Engine will probably misfire at idle due to too much timing, won't pass emissions. And, there will be no cold start high idle assist (which is the result of removing vacuum from the pot when the engine is cold).
What else is it good for? Runs cooler and idles smoother at idle, and assists in lowering emissions which makes tree huggers happy. Or, if one is looking for more off boost power, facilitates 10/12 degrees excess timing (to give you 20/22 degrees timing off idle/off boost to help wake up low end performance - provided however, one can get rid of the excess timing when the engine goes into boost. (It's but a small piece of the slippery slope.)