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 hulbyw
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| posted on October 18th, 2009 at 09:19 PM |
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Silicone Spark Plug lead retainers
Have silicone spark plug leads fitted but they are too fat for the plastic retainers that clip into the fan shroud. Tried filing them but there is not
much plastic to file. Anyone out there already solved this problem?
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bajachris88
A.k.a.: Chris Leete
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| posted on October 18th, 2009 at 11:05 PM |
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If its just the plastic that holds the leads together... you can buy new universal ones from your auto parts store.
(ô_!_/ô) (ô_!_/ô)
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68AutoBug
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 posted on October 19th, 2009 at 12:42 AM |
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| Quote: | Originally
posted by hulbyw
Have silicone spark plug leads fitted but they are too fat for the plastic retainers that clip into the fan shroud. Tried filing them but there is not
much plastic to file. Anyone out there already solved this problem?
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Hi,
When i replaced My wire vw leads a few months ago, I used 8mm silicone leads...
and although the plastic bits are sitting in the holes...
the 8mm leads are not fitted to them...
I don't know of any quick answer...
the generic ones [which I have in a plastic bag somewhere]
are NOT going to answer the problem...
that is how to keep the leads away from metal so they don't short out...
plus they don;'t get melted on hot exhaust pipes...
Maybe 90 degree plastic ones would work.. not sure what You would mount them onto the fan shroud with..
maybe a 10mm bolt & nut..??
PH Billet has got customised alloy ones...
can't exactly remember what they looked like...
the VW bits are made for 6mm leads I believe so 8mm ones are a bit too big... but after filing the U shaped bits..
what about filing in between the back part so they can open further much more easy...
then a bit of soapy water...
but beware.. the silicone cord in the centre can break very easily if pulled... [I found that out with My Coil lead]
there are excellent Hi tech leads out there [read expensive]
the spiral type that are guaranteed for life...
and are excellent for noise suppression in two way radios...
but are probably 12mm thick....
then you have problems...
Remember nothing is impossible....
Just a darn sight harder...
[so I'm told...lol ]
cheers
LEE
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- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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johny rotten
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| posted on October 19th, 2009 at 07:02 AM |
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Don't use silicon leads on a vw air cooled motor unless u want problems
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hulbyw
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| posted on October 19th, 2009 at 08:55 AM |
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I have heard this before but when asking for more information havn't had anyone be able to be specific about what problems they cause. Personally I
don't understand what the difference is between air and water cooled as far as providing power to the spark plugs but I am certainly no expert so
would welcome your input
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 matberry
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| posted on October 19th, 2009 at 09:01 AM |
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The difference is the ignition system already has enough resistance built in with a 5k ohm rotor button. When you add the high resistance of the
silicone ignition leads (designed for a zero resistance rotor) you are adding too much resistance to the system for the coil which WILL die.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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hulbyw
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| posted on October 19th, 2009 at 03:10 PM |
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Thanks Matt. An explanation at last. The guy who made the leads said it depends on what model 009 (genuine etc) I have as to what resistance is in the
rotor button. Also, the leads he made are about 2000 ohm resistance which he reckons is less than the standard leads/resistor ends. So hopefully my
old GT40 won't croak.
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johny rotten
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| posted on October 19th, 2009 at 08:15 PM |
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Silicon leads tend to cross fire and break down much quicker in the air cooled engine bay with the extreme temps @ the cylinder head,
also the high resistance is not helpful as has already been pointed out.
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hulbyw
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| posted on October 19th, 2009 at 08:52 PM |
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Thanks. What sort of leads should I be using and where are they readily available?
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johny rotten
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| posted on October 19th, 2009 at 09:46 PM |
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std vw plug end are 1k ohm copper leads are zero
the rotors vary between 1 to 5k ohm
anyone who sells silicon leads for an air cooled 
just used std ones unless you are using EFI then u must use SPIRAL core silicon
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68AutoBug
A.k.a.: Lee Noonan
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| posted on October 19th, 2009 at 11:07 PM |
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| Quote: | Originally
posted by hulbyw
Thanks Matt. An explanation at last. The guy who made the leads said it depends on what model 009 (genuine etc) I have as to what resistance is in the
rotor button. Also, the leads he made are about 2000 ohm resistance which he reckons is less than the standard leads/resistor ends. So hopefully my
old GT40 won't croak.
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Yes,
You can still buy the original wire type leads... [not expensive]
and also use the special resistor spark plug caps...
VW had the resistance in the spark plug caps and the rotor...
I had lots of problems running silicon leads in My type 3 back in the 70s-80s..
the heat of the engine killed them...
shorted out everywhere...
I'm using silicon leads at the moment to try to stop the interference in My 2 way radio...
My engine lid is also open at the top...
My rotor doesn't have the resistor...
You can buy them in the USA.... CIP1 or CB Performance.?
I would like the Spiral leads... but out of My bank balance..
I may go back to the wire leads and cover them with copper sheathing from Coaxial cable...
Dizzy cap will be fun...
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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