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On 27 Sep 2005 at 7:43, Chris Wright wrote: > Hi Jim, > once again, many thanks, my responses are in caps after each question. > Good suggestions, but again all tried ecept the dizzy cap. Please keep > them coming!!!! Uhhh, the first one would be to avoid quoting a whole digest when you post a reply.... ;-) Second would be to mention that the caps are not necessary, because your email software properly puts the > sign in front of the quoted material. You need to start each of your replies on a fresh line (hit carriage return), however, to make this work right. > >Jim's reply: > >I'm not familiar with the early distributors, but if there's a wire in there > >that flexes as the dist advances, you should consider the possiblity that the > >wire itself is broken under the insulation. I've seen that happen, and you can > >only tell it by pulling rather hard on the wire to see if the insulation > >stretches and breaks. > THERE IS A BRAID WHICH IS SOLDERED ONTO THE NEW VAC UNIT WHICH IS > SECURELY SCREWED TO THE ADVANCE PLATE. That braid is usually soldered or welded at each end, but that's not the wire I was talking about. How about the wire to the points? Is there a wire there that you haven't changed? > >>>>On 26 Sep 2005 at 10:02, chris wright wrote: > >>>> > >>>> > >>>>You can imagine it best by imagining accelerating on a very bumpy road so > >>>>that the car jerks over the bumps. > >>>To me this sounds more like ignition "miss" than anything else. I would be > >>>looking at ignition problems. > >The Bosch caps seem to last forever. In general, I only see them damaged when > >abused, never just from use. Is the carbon contact inside the top center still > >there, protruding and spring loaded? > > > IT IS LOOKING OK BUT I CAN'T VOUCH FOR THE LENGTH OR STRENGTH OF THE > SPRING. IVE TRIED GIVING IT A SMALL STRETCH. It should probably stick out about 1/4" and should push back in easily. You may be able to feel that you've hit it as you slowly lower the cap into place. As long as it touches it is fine. > >>I'VE NOT USED IT IN THE RAIN LATELY AND IV'E DRIVEN TO WORK SEVERAL > >>TIMES IN THE SUN, A 40 MILE EACH WAY TRIP. What's your overnight weather like? Where are you located? Any rain at night, heavy dew in the morning? > >I wonder if another possibility is that what you're feeling is a slight > >pinging. Have you tried higher octane gas? Upping the displacement from 1500 to > >1600 would also up the compression ratio a bit, and this could be blindsiding > >you. > NO PINGING UNDER ANY CONDITIONS. I TRIED 98OCTANE BUT NO DIFFERENCE. > WOULDN'T GOING FROM 1500s PISTONS TO 1600 FLAT TOP LOWER THE COMPRESSION > RATIO? Going from the domes to flat tops would lower the CR. Going from 1500 to 1600 would raise it. If the heads were flycut to clean up the sealing surfaces that would raise it. It's not at all clear where your CR is now, unless your chamber volume and deck height were measured after the engine was rebuilt. If 98 octane didn't help, then it's probably not a CR problem. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~