[DMCForum] Re: B28E/F how to tell them apart?

["content22207" <brobertson@xxxxxxxxxxxx>]

Actually John DeLorean used a bastardized F series engine:
- Advanced base ignition time (with correspondingly lighter
counterweight?)
- No smog pump, which I maintain pushes the catalytic converter to the
edge of its operating parameters
- No EGR (that's what the capped off port in the U pipes is for)
- Relocated alternator
- Shallower oil pan

Differences between E and F series engines (circa 1981):
- Higher compression (9.5:1), achieved through taller pistons
- No Lambda Sond
- No EGR (except Sweden & Australia) 
- No charcoal canister (except Sweden & Australia)
- Much richer fuel mixture (2% CO2)
- Series 038 CPR versus Series 066 -- closes much more slowly (~160
degrees) and exerts slightly less counter pressure. Vacuum enrichment
is *MUCH* simpler
Heads are the same between E and F series: Same deck height, same size
valves, same cam lift and valve lash.

You may have one of the Renault imports (Z7V) that apparently were
being marketed out of Ohio in the late 80's. Differences from Volvo E
series:
- Aluminum fuel distributor with external balancing screws (don't mess
with them)
- Metal injector and CPR fuel lines
- Dampener between the CPR and the fuel distributor
- PCV through the U pipes rather than the cold start tube
Z7V uses a one piece upper air assembly. Many more vacuum nipples &
ports than Volvo, most of them capped off. CO2 screw access port is
threaded and plugged with a washer base machine screw. No place to
attach an idle microswitch. Throttle plates are solid (no deceleration
valves)

Engine ID plates wandered around the PRV. You should find yours either:
- Next to the driver motor mount
- Next to the oil filter
- On the 4-6 cylinder head, facing the passenger compartment
I don't have any means of translating it anyway. Perhaps Martin's
friend Darren Bowker does.

Bill Robertson
#5939

>--- In DMCForum@xxxxxxxxxxxxxxx, "Wilhelm Starberg" <wilm@xxxx> wrote:
> Hi,
> 
> When I bought my car, the dealer told me that the engine had
> been replaced by a european model.
> 
> I noticed today that the car was missing the frequency valve...and
> some other parts.
> The fuel distributor is DMC type (0-438-100-109).
> 
> Has there been a bastard engine install? if the engine is a
> B28E - should not the fuel delivery system be replaced as well?
> 
> Is there an ID plate somewhere on the engine to tell which type
> it is?
> 
> Thanks.
> 
> 
> Wilhelm S.  #10816
> http://home.broadpark.no/~wstarber/dmc/index.html

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