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Join Date: Oct 2006
Location: north carolina
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dwell meter hook up (101 projects pg 73)
1974 911, 2.7, all stock with cap discharge system and points.
. Waynes book 101 projects, pg 73 says do NOT connect the dwell meter across the coil as damage may occur to the CD system and the meter, instead hook the "signal lead" (- lead I guess?), to the point wire on the dist. I thought the neg wire on the coil went to the dist?............I'm confused?? , please describe the best way to hook up my dwell meter, and help me understand why? thanks , marion
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marion.. '74 911 |
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02-25-2007, 04:10 PM
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02-25-2007, 04:39 PM
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Honestly, I haven't hooked up a dwell meter to a car in like 20 years
 ...but in the past I always used "distributor side of the coil" and ground. Works on domestic points-era cars. Any reason why that explanation won't work on a Porsche?
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Dan in Pasadena '76 911S Sahara Beige/Cork |
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02-25-2007, 05:11 PM
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The points for a CDI system are just a switch for to tell the CDI Box to fire. Unlike the older, Kettering system, where the points directly sent voltage to the coil.
There is a connector just on the outside of the distributor where the points are connected, this is the location Wayne is refering to.
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Harry 1970 VW Sunroof Bus - "The Magic Bus" 1971 Jaguar XKE 2+2 V12 Coupe - {insert name here} 1973.5 911T Targa - "Smokey" 2020 MB E350 4Matic |
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02-25-2007, 05:19 PM
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The dwell meter goes across the points in a CDI system, which means one side to ground and the other side to the trigger lead at the distributor to the CDI and tach.
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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02-25-2007, 05:31 PM
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Set dwell at 38 +- 3.......Works better than a feeler gauge any day....
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Bob S. 73.5 911T 1969 911T Coo' pay (one owner) 1960 Mercedes 190SL 1962 XKE Roadster (sold) - 13 motorcycles |
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02-25-2007, 07:34 PM
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thanks folks,,
think i got it,, dwell hook up: neg to ground, and pos to the connection on the side of the dist (two spade tip connectors, of which one goes to the CDI and the other to the tach).. .. 38 + - 3..... thanks marion....
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marion.. '74 911 |
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02-26-2007, 05:01 AM
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
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Marion,
I like to set my dwell initially @ 35. Then, as the rub block and point gap goes down and the dwell increases, it will eventually get to 41, which is the other extreme. Don't forget to oil the distributor wick and grease the rub block and shaft surfaces.
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Paul Yellow 77 Sunroof Coupe/cork interior; 3.2L SS '80 engine/10.3:1/No O2; Carrera Tensioners; 11 Blade Fan; Turbo tie rods; Bilstein B6; 28 tube Cooler; SSI, Dansk; MSD/Blaster; 16x7" Fuchs/205/50 Firestone Firehawk Indy 500s; PCA/UCR, MID9 Never leave well enough alone |
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02-26-2007, 07:47 AM
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Paul, another great idea,,thanks...
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marion.. '74 911 |
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02-28-2007, 10:33 AM
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1987 Porsche 944 2.5
