[Diy_efi] OT - cap/rotor clearance

[Bobby Yates Emory]

Bill,

No experience having to deal with this, but I would go with the .035
that the original rotor/cap had.

Bobby

On 10/17/05, Bill Shaw <b.shaw at comcast.net> wrote:
> Hi,
>
> I'm not getting anywhere on the f-list,  so I thought I'd ask here.  Please
> indulge my off topicness :-)   I'm just finishing up a major service in a
> 1980 Ferrari 308i.  It's K-jet injection with lambda and dual Marelli
> Digiplex ignitions.  (kinda of makes it e-fi,  doesn't it?)
>
> pic at http://b.shaw.home.comcast.net/308eng4.jpg  (and eng, eng2, and eng3
> if you're interested)
>
> All's gone well until I started it.  The new rotors seem to be a bit too
> long,  one gouged a cap a bit:
> http://b.shaw.home.comcast.net/ferrari/308cap.jpg
>
> and the other hit enough to break off:
> http://b.shaw.home.comcast.net/ferrari/308rotor.jpg
>
> As you can see in the next pic,  the new rotor (on the bottom) is quite a
> bit longer than the old one (on the top):
> http://b.shaw.home.comcast.net/ferrari/308rotor2.jpg
>
> When I clayed the cap/rotor combination (after the fact) I found the old
> rotor had about 0.035" clearance to the terminal with the old cap,  and
> about 0.45 with the new cap.  The new rotor scraped the terminal in both
> caps.
>
> The f-parts suppliers haven't offer much help beyond a refund (which was
> nice).  Parts sources for this car are so scarce that it leaves me
> re-working some very expensive new parts to make it function.
>
> So after all that,  my question for the group is.... What is a 'reasonable'
> rotor-to-terminal clearance?  I can make it anything I want,  since I now
> have 0 or less clearance.  Left to my own devices I'd shoot for 25 thou.  Is
> that a reasonable target?
>
> Bill
> '84 928s 5 sp. Vortech/749
> '84 Mondial cab (for sale)
> '80 308i (still in surgery)
> '94 z28 LT1/A4 (mean green snow eating machine)
>
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--
Toward freedom,

Bobby Yates Emory