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Replies:
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Last Post:
Oct 13, 2009 2:00 PM
Last Post By: BUGGSY
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Posts:
181
Registered:
11/04/06
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Platinum plugs in a modified type 1 engine
Posted:
Oct 12, 2009 1:13 PM
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Has anyone used Bosch platinum plugs in a mildly built bug engine with a Pertronix ignitor? What results were found? Positive? Negative? Looking for opinions.
Buggsy
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Posts:
1,207
Registered:
08/06/02
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Re: Platinum plugs in a modified type 1 engine
Posted:
Oct 12, 2009 1:26 PM
in response to: BUGGSY
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I haven't, but most aircooled types say they don't work well. (However they also say to avoid them in the waterboxer van engines, and I've had good luck with them there.)
I use plain NGK in my Mexican aircooled beetles, and they last 25,000+ miles between changes.
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Posts:
181
Registered:
11/04/06
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Re: Platinum plugs in a modified type 1 engine
Posted:
Oct 12, 2009 4:50 PM
in response to: TomB
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Thanks for the reply. Yes, I've heard Platinum does not work very well in aircooled engines. BUT, are the results
for an electronic ignition the same as for points and
condenser? I would assume that there would be a marked difference with a gap of 28, as in points, as opposed to 40 with electronic.
Buggsy
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Posts:
1,207
Registered:
08/06/02
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Re: Platinum plugs in a modified type 1 engine
Posted:
Oct 12, 2009 7:34 PM
in response to: BUGGSY
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If you go with a larger gap be aware it causes higher voltages on plug wires, distributor caps, etc. and can cause arcs to ground more often. I experimented with larger gaps and electronic ignitions back in the 70s, and could never find a measureable improvement compared to std system well maintained with .028 gap.
However, the key may be "well maintained" - so those with point problems, old wires and plugs may have found a difference, just because the electronic ignition needs less care.
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Posts:
2,735
Registered:
09/08/00
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Re: Platinum plugs in a modified type 1 engine
Posted:
Oct 12, 2009 9:29 PM
in response to: TomB
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Good Evening, Gentlemen,
As it happens, I use Bosch Platinums in my stock '69 Beetle Sedan with a with Pertronix Ignitor. It is installed in a stock 205T vacuum advance distributor with the timing set at the stock 0 degrees.
After about 4 years and maybe 3000 miles, I have had NO problems. I don't remember if I changed the gap or left it as the plugs came out of the box (it was so long ago).
I rebuilt the engine to stock 1500 standards. I had the heads flycut which brought the compression ratio up slightly. This is the reason for the 0 degree timing spec. rather than the more common practice of bumping it up a few degrees.
In my experience, Bosch Platinums, stock wires and Pertronix ignition make a good setup.
Art LeBrun
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Posts:
181
Registered:
11/04/06
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Re: Platinum plugs in a modified type 1 engine
Posted:
Oct 13, 2009 2:00 PM
in response to: Art
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The engine I run in my 73 bug is 1955cc's. 76 x 90.5, Engle 130, big valve heads 40 x35.5, dual 44IDF's correctly tuned and synced,, Bosch 019 distributor with Pertronix Ignitor #1844, plugs are Bosch WR7CC's gapped to 0.040, the wires are modified VR6 wires, so I'm not getting the arcing I got with stock.
I had thought about trying Platinum, but because of the
scuttlebutt about Platinum and aircooled engines, I figured why not post it up and get some in depth answers.
Two reasons for not using Platinum in my engine are, 1.
Platinum was designed with fuel management in mind, you know, ECU's, ECT's, O2 sensors, etc. 2. Because of the
small center electrode, a carbureted engine such as mine,
would cause fouling in a short time.
Weather or not these reasons are valid, they make sense
to me. None the less, I'd still like to hear more on this subject, especially from the non stock guys.
Buggsy
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