[ROVERNET - UK] SD1 Vitesse/EFI: which fuel pressure regulator (standard/adjustable)?

[Kent Kinard]

No, It only increases fueling at high RPM as I understand.  It would 
depend on how your emissions tests are run.  If anything, I think it may 
help with emissions.  I have not used the one RPI sells, but I have used 
the Mallory adjustable bypass type regulator with good success on both 
fuel injection and carb engines or even to use a carburetor with the 
high pressure Bosch pump (the Mallory regulator comes with an assortment 
of springs to tune it to various pressures, thus allowing it to serve 
both EFI and Carb engines).
Kent K.

pj.info wrote:
> Hi Kent
>
> Thank you for the hint. Btw. do you think this replacement would basically affect the emission values?
>
> Best regards,
> Pierre.
>
> Le lundi 21 janvier 2008 22:14, vous avez écrit :
>   
>> Hi Pierre,
>> Replacing the fuel pressure regulator is a good idea anyway.  The 4CU 
>> systems tend to run lean at the top end and the standard fix has been to 
>> install a rising rate fuel pressure regulator.  RPI sells them and has 
>> listed them on their Ebay store in the past.
>>
>> Roverly,
>> Kent K.
>>
>> pj.info wrote:
>>     
>>> Dear Rovernetters
>>>
>>> I noticed that the membrane of my pressure regulator lets air passing through 
>>> from the fuel supply / tank return side to the manifold depression pipe side. 
>>> Is this normal? I suspect the regulator being defective. (I already had 
>>> several cold start problems -just unwilling to fire up- although the battery 
>>> was in perfect condition and the distributor / spark plug cables ok and fuel 
>>> flowing though the rails by slightly depressing the flap of the air-flow 
>>> meter).
>>>
>>> Having had a look at Rimmers,  there are 2 possible choices for the fuel 
>>> pressure regulator:
>>> - Standard	ERR268 (now replaced by EAC1284P)
>>> - Adjustable	EAC1284UR
>>>
>>> => Does the adjustable regulator fit just in place of the standard one?
>>> => Does anybody have had any experience with adjustable pressure regulators, 
>>> i.e. how would you tune it (could this have an influence on the pollution 
>>> figures NOx,CO,...)?
>>>
>>> Thank you for your advice.
>>>
>>> Best regards,
>>> Pierre.
>>> '86 SD1 - Vitesse
>>>
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>>>       
>
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