R30 PRV Timed 10 degrees

["content22207" <brobertson@xxxx>]

According to Martin Gutkowski's PRV buddy, my R30 PRV (Renault) should
be timed 10 degrees. I've tried it at 13, but performance suffers.
Slightly retarded (by DMC standards) timing and a 40,000 volt spark
give me a pretty good jump off the line, even though displacement is
only 2.5 liters. 

Fully agree intake air is important. That's why I'm going to replace
missing fresh air hose. Fords can breathe under the hood. DeLo's can not.

Re: predetonation at full throttle -- I have no provision for fuel
enrichment (other that CPR, which is ambient cold sensitive only). No
Lambda system whatsoever. My CPR has no vacuum chambers. Perhaps one
reason stock DeLo's don't predetonate is extra rich mixture at full
throttle. Other is spark. Not only am I timed later, but my advance is
taken BEFORE throttle plates (by Relault design). Even with the plates
wide open I probably ignite closer to top than stock DeLo's. FWIW, 93
octane took the clatter right out. After dark I went back to 89 no
problem. 5 hours of cloudless sun, continuous A/C (freon on the high
side is HOT), and intake air from under the hood got me (until I threw
a bottle of octane boost in that first tank).

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "B Benson" <delornut@xxxx> wrote:
> Intake air and coolant are the important items in maintaining proper
engine
> temps. The air flowing over the exterior of the engine pays a pretty
> insignificant role. The main thing is allowing the heat to dissipate
away
> from the engine compartment and the Delorean seems able to handle that
> pretty well. Coolant temps of 220 degrees are a bit high but aren't that
> extreme and I've yet to see a properly tuned DeLorean without a
turbocharger
> that will pre-detonate at 13 degrees BTC ignition timing. >> 
> Bruce Benson