[6pack] Pinging Engine

[Tomislav Marincic]

Hello Andrew,

Thanks for the reply.

Do you have any idea if the 123 distributor can be used as a trigger for an MSD 6A series CDI ignition?

Thanks, Tom


-----Original Message-----
>From: Andrew Uprichard <auprichard at uprichard.net>
>Sent: Apr 9, 2012 5:22 PM
>To: 'Tomislav Marincic' <tomislav.marincic at earthlink.net>, 6pack at autox.team.net
>Subject: RE: [6pack] Pinging Engine
>
>I put a 123 distributor on my last TR3 and it worked a charm.  
>
>I have one in my recently-finished fast-road TR250 and it seems to be fine.
>I will be putting the car on a dyno in a couple of weeks, so we'll probably
>vary the settings then for maximal performance.
>
>Andrew Uprichard
>
>-----Original Message-----
>From: 6pack-bounces at autox.team.net [mailto:6pack-bounces at autox.team.net] On
>Behalf Of Tomislav Marincic
>Sent: Monday, April 09, 2012 2:45 PM
>To: 6pack at autox.team.net
>Subject: [6pack] Pinging Engine
>
>My TR6 is pinging after a high performance rebuild, and I can't stop it. 
>
> 
>
>I've done lots of things (high octane via xylene, retarded ignition, colder
>plugs, richer mix) but it's starting to look that either the machinist
>screwed up the head, or I've just built a monster.
>
> 
>
>I had a few specific questions:
>
> 
>
>1.      Cranking compression. The engine was built to 9.5:1 specs,
>45.6cc/chamber. My cranking compression hot is 195 +/-5 psi with a Goodparts
>GP-2 cam, which strikes me as 10-15 psi high. Anyone else have a comparison
>of nominal CR vs. compression with a similar cam?
>
>2.      Timing. Jeff at Advanced Distributors does great work, but he
>refuses to tell me what specs he built my distributor to, which is not
>helpful. Does anyone have experience with the 123 Distributor, which allows
>the timing curve to be manipulated? Is that distributor compatible with the
>MSD 6 series ignition?
>
> 
>
>Thanks for your help. If I hadn't used forged pistons, I'm sure I'd have
>blown a ring land by now.
>
> 
>
>Cheers, Tom
>
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