distributor rotor question

Bernie Benz b.benz at charter.net
Mon Dec 8 11:42:24 EST 2003

Thanks Mihnea,

With this info on max chipped advance, the "narrow minded" could lay out to
scale on paper the plan view of the dist cap with TDC on the #1 plug
centered on the rotor width (is this correct?) and dial in the max advance
with the two different rotor widths, and see if the max rotor position
remains closer to the #1 pin than to the ajacent pin on the wider tip.  If
so, not to worry.


> From: Mihnea Cotet <mik at info.fundp.ac.be>
> Date: Mon, 08 Dec 2003 17:08:49 +0100
> To: Bernie Benz <b.benz at charter.net>
> Cc: 200q20V mailing list <200q20v at audifans.com>
> Subject: Re: distributor rotor question
> At 07:56 8/12/2003 -0800, Bernie Benz wrote:
>>> but in a chipped application or a car with serious mods, RS2 turbo, EM,
>>> injectors and running 2.7 Bar absolute peak boost for 440lb/ft it would be
>>> quite risky to say "nah, who cares, I know better", huh? :-)
>> The distributor neither knows nor cares what the engine's externals are.
>> The only meaningfull Q in my mind is, and who better to answer than you,
>> Mihnea:  Do any of the more aggressive ECU mods use a greater total advance
>> angle, full retard to full advance, than does the stock ECU?
> Yes they do Bernie, a stock 3B's maximum total advance is 12 degree BTDC,
> not corrected by intake temperature compensation which range or temp range
> I won't mention here. On the 360+ 3Bs that I've tuned so far, total advance
> is increased to about 26 degree BTDC, uncorrected too. No further retard
> over stock values BTW.
>> If so, is any
>> such increase in the max advance angle over stock enough to possibly cause
>> sparking to an ajacent plug point?
> I quite frankly don't know, it has never happened to me, so I suppose that
> if it's done properly (I'm not saying I've really done it properly but it's
> been 30.000 miles that those motors have been running strong with no
> damage) it can't happen, at least not if everything else on the motor is ok...
> HTH,
> Mihnea
>> Bernie

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