Cavis ignition wires

Do you even have a choice w your suppliers?

 

The Cavis red and the Cavis black that I have seen are both spiral wound. The core was not carbon like one would find in a NAPA Belden wire. It seemed to be some kind of nylon or plastic filament. It was fairly hard.

The Cavis red disappeared quite a few years ago, but the last time I needed it the Cavis black was available from Ferrari by the meter. GT Car Parts has a French sourced black wire that is spiral bound and works very well at a fair price. Of course the printing on the wire is not "correct".

I don't know if it is still true, but Alfa wire sets used to come with Cavis red wire and it could be used for many Ferrari applications. The problem was the limited lengths that were available.

 

You can purchase Cavis high tension wires by the foot from Jacques at Maseratisource www.maseratisource.com
I'm not sure if he has the exact wires you are looking for, but it's worth a shot!

~Ciao!

 

OK, I don't have electrical engineering degree, but based on my limited experience and (perhaps inadequate) abilities to analyze these sort of things, this is the way I think (red) Cavis wire is constructed (and anybody with more knowledge on this , please correct me, if required):
The outside red plastic/rubber mixture is the "insulator/housing" for two inner components, first and the outer being the spiral metal-wire, which is the actual "conductor" for current and is coiled around the second component, which is either just a "support" to wrap the conducting wire to or it might also act as some type of "suppressor" to help keep the electrical field better contained and not play havoc on radio waves (?).

Just recently I discovered how much PITA these wires can actually be. Trying to isolate a problem and after multiple conductivity tests, which showed the wires being fine every time, but once installed on a freshly rebuilt and running (Daytona) engine, were periodically "acting up". Well, some of the (New/Prefabricated) wires had inadequately assembled spark-plug ends and apparently made just enough contact every time I had pulled them out and was pending them "just right"(?) for testing. Once in place, the contact was lost.
Timo

 

The metal inner conductor wire in the red Cavis ignition wire, which is hard to work with and very easy to break as it is a little larger in diameter than a human hair is wound around a fiberglass inner core. This is just a support for the wire and does not conduct electricity. Once the small metal wire breaks, the wire will show infinite resistance if you check it with an ohmmeter. Sometimes the engine will still run with broken wires as the spark arcs internally in the wire. But I have found replacing broken wires with new will make a significant difference in how well the engine runs.

 

I have used the first listed wire (21570) for replacing the whole set. Of course it does not say Cavis on the wire, but the printing on it is easily removed w/ solvent. It is non-suppression type.


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there is a cavis set for a daytona on ebay.
ed

 

Dave Helms at Scuderia Rampante has silicone jacket Taylor ignition wire that he sells in bulk length with terminals. Exceptional product if you can live with a black jacket.

 

Steve
The eBay ads says brand new. Unopened package
Ed

 

+1. The Taylor 7mm wires that Dave Helms (Scuderia Rampante) are the best you get get. He will sell in bulk or you send him your wires and he makes a set for you and his turn around is wicked quick. You can't compare the two. The Taylor wire is the best there is. Dave has all the remaining wires that were available. Give him a call and it will put your wire issues to bed.

R

 

I bought up all the remaining bulk supply inventory that Taylor had on hand a number of years ago. I had them build the plug wire to my spec's from this inventory as they insisted they will not longer build 7MM wire from that day forward. No way in dickens I am drilling out $400 caps, re manufacturing 250 wire loom tubes or shaving 8MM wire, thats a non starter. Black only, with no printing, as I was most concerned about having wire for the Vintage cars and the QV cars with the silicone sheath.

This is the third time I have had Taylor make this wire for me and each time it was shipped on 100 ft spools, all boxed and taped to a pallet. This time..... when the goal at Taylor was to clean out the all remaining inventory of supplies..... One large wooden spool with 6000 +ft, that must be moved with a forklift. Who said they dont have a sense of humor when it comes to products Made in USA?! When this spool gets down to 3K ft... thats it and I save the remainder it of my own use only.

There are big differences in quality when it comes to plug wire. What is under the skin and out of sight, makes a BIG difference.
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If your worried about the wires being red.. Shrink tube it and call it a day.. You'll never have to worry about wires again..

R