REFLECTOR: Old Threade - Franklin oil pump spring

[aminetech at bluefrog.com]

You might try franklinengines at yahoogroups.com

John

> You should go grab a copy of Rick Lavoie's PDF on his conversation with
> PZL regarding this subject.  I asked him if I could put up a copy here
> for download, but he said no.
>
> http://www.lavoiegraphics.com/newsletter/files/pzlfaxes.pdf
>
> Also, you should go through the downloads area on TVBF.org.  Might be
> something useful in there.
>
> Failing that, the two springs are for two different pressures.  The
> light spring opens when a pressure differential exceeding 14 PSI across
> the cooler/filter lines exists.  The heavy spring opens when a pressure
> differential exceeding 90PSI (as I recall) across the oil outlet to sump
> exists.
>
> So, worst case scenario, that 14PSI spring keeps your oil filter from
> bursting at 90+14 PSI.  Increase the bypass pressure, and your
> filter/cooler sees higher absolute pressure.
> Plug up your blowby tube, and the sump pressure reference goes up, which
> will most likely pop a gland, but also increases the cooling loop
> absolute pressure.
>
>> -----Original Message-----
>> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]On
>> Behalf Of Jeff Clough
>> Sent: Sunday, December 26, 2004 10:23 PM
>> To: reflector at awpi.com
>> Subject: REFLECTOR: Old Threade - Franklin oil pump spring
>>
>>
>> I hate to dredge this up again, but I could not find the info in the
>> archives......with the Franklin engine nstallation and an up front oil
>> cooler a stronger spring needed to be installed in the oil bypass area
>> to acheive greater oil pressure.   Supposedly the stronger spring
>> could replace either of the springs in the bypass pump.....Well for a
>> few years I have had the sronger spring and FINALLY went to install
>> it..BUT the two springs  in the bypass are different......one is a
>> very light spring and the other is the identical spring to the
>> 'stronger ' one  I was going to install.   The stronger spring when
>> fully compressed is still too long to fit in the space of the lighter
>> spring.... I guess what I need to know is this: is  the stronger
>> spring which is already installed is aqequate or if anyone who
>> installed the stronger
>> replacement spring in place of the lighter spring had to cut the
>> spring length down.....Confused in AK....anyone else confused now?
>> THANX Jeff Clough
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