Re: [DMCForum] Re: Series 038 CPR on F Series Engine

[Martin Gutkowski <martin@xxxxxxxxxxxxxx>]

> Were you trying this with Lambda active? Can't do that. Series 066 CPR
> and the frequency valve are evil partners in crime. Simply unplug it
> (don't worry about capping off lower fuel distributor chambers), swap
> CPR's, adjust CO2, and you'll be cool.

Nope. Although you're right that the 066 is meant for a lambda equipped 
engine, they're not "partners in crime". The 066 and 038 warm up stats 
are similar. It's the accelleration enrichment that differs massively, 
for the simple reason that the DeLorean engine backfires like a good un 
when cold unless you richen it up quite considerably. The metering heads 
  put out different fuelling curves, regardless of the primary pressure 
regulator. The DeLorean metering head is actually designed to flow more 
fuel at top end for example.

> Series 066 full throttle enrichment is higher only because later F
> series operate in a perpetually fuel starved state. Notice pre-Lambda
> imports don't do that.

So you realise then that the 066 vacuum enrichment is plumbed up to only 
do something when the engine's cold on a DeLorean? Perpetually fuel 
starved state? Do you even KNOW what the lambda system does? OK, it's 
possible, with the right timing, to put a little more fuel in and get 
more power out, but it's definitely not correct to suggest it's 
perpetually starved. The lambda system actually controls the mixture to 
keep the fuel-air ratio spot on for best economy and emissions. It's 
condusive to a longer lasting engine too. Oil leaks notwithstanding....

Martin

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