Jarrid Gross wrote:
> Steven and piners,
Jarrid , you make some very good points, and I especially like the idea of the
spray tube?? That would probably give you a few more pounds , but would it be
significantly more? Also in the work book i have shows youhow to measure the
oil pump and the clearances for that , of which is most likely the most likely
bug to be. In all the pumps I work with in the heavy industry pumps taht are out
of clearance or just plain worn are the main problem. That would be my first
area to look and get fixed. Both Rick, Curt and many others have very good ideas
and a phone call is cheep in the Pine care area.
cheers
chuck
> Ive rebuilt sunbeam engines, and came up with less than ideal
> oil pressure.
>
> There are a lot of places though that should be looked at
> to assure higher oil pressure.
>
> Measure your bearings with an inside micrometer, then measure the journals.
> Just becuase you paid a lot of money to have this all machined doesnt
> mean it got doen right.
>
> The oil tube that sprays oil on the chain tensioner, can/should be crimped
> off at the end of the tube. Dont ask me why its open in the first place.
>
> Worn oil pump?
> The oil pump CAN be blue printed. This procedure involves setting the
> rotor to end plate clearances on the tight side of good. Lapping the
> end plate is also a good idea.
>
> I just finished with my 1725 race engine, and although the engine seems
> to have some unexplained noises, the oil pressure is 50+ PSI at hot idle.
> The engine makes 70+ PSI at anything over 1500 RPM.
>
> The magic here is that I modified a 1725 oil pump to use an MGB rotor set,
> and extended the pump housing to accomdate the longer rotor set.
> It was a GREAT DEAL OF TROUBLE, but considering the amount of oil pressure
> I have on this engine, its probably the best spent money to date.
> BTW, this mod yields 22% more oil pump volume as compared to the stock
> 1725 pump.
>
> Jarrid
>
> Steve wrote...
>
> >Has anybody modified the Presure relief valve and how well did it work?
> >Any problems or cautions?
>
> >I have a Series V with the 1725 which is showing weakness in oil presure
> >which seems to be caused by the relief valve (~15-45 pounds hot). The
> >engine is fresh so I don't believe that it is caused by another mechanical
> >ailment.
>
> >It has a new oil pump, bearings, new rod bushings, so I would expect better
> >presure. It does run great.
>
> >Thanks,
>
> >Steve
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