[DMCForum] Re: More B28E/F

["content22207" <brobertson@xxxxxxxxxxxx>]

"Big Hairy Muff" (did I do that correctly Martin?)

If your engine is backfiring, especially cold, you've got bigger
problems than the CPR:
- Improper valve lash
- Worn valves
- Sagging or skipped timing chain
- Improper ignition time

Series 004 and 029 CPR were standard F series until 1980. Series 038
has virtually same parameters:
- Full closed temp: 156 degrees (004 and 029) versus 160 degrees (038) 
- Full closed pressure: 49-53 PSI (004 and 029) versus 49-53 PSI (038) 
Does start ~0 PSI versus ~11 PSI (004) and ~6 PSI (029), but a rich
mixture is LESS volatile than a lean one...

Series 004 has no full throttle enrichment of course, but you claim
that has no real effect anyway (I disagree -- noticed significant
improvement when I connected mine).

For the curious, Series 066 starts ~16 PSI, closes at just 106
degrees. Final pressure is same however.

Louie Golden is running my spare Series 038 CPR with good results on
an otherwise stock engine (CIS out of service).

Bill Robertson
#5939
 
>--- In DMCForum@xxxxxxxxxxxxxxx, Martin Gutkowski <martin@xxxx> wrote:
> Not so - an 038 CPR's vacuum enrichment is MUCH lower than the DeLorean 
> CPR (around 0.2bar drop in control pressure vs over 1bar in an 066 
> DeLorean CPR), and an 038 in a DeLorean engine results in terrible 
> backfiring when cold. Been there, done it. The DeLorean CPR only gives 
> vacuum enrichment when cold, and the throttle enrichment is controlled 
> by the lambda system when warm.
> 
> William was querying the 037 metering head, not CPR, and it looks
like a 
> non-lambda B28E one to me, the later one with adjustable ports.
> 
> Martin
> 
> John Hervey wrote:
> 
> > Wilhelm,
> > The 0-438-140-038 CPR was used on several euro cars, Ford,
Peugeot, Volvo
> > and Renault. It should work fine on the Delorean because it was
used on the
> > Volvo 240 and 260 injected E engines from 80 thru 84.
> >

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