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extended oil sumps ??

T

tortoise7

New member
After an engine failure in my track master this winter, I am upgrading to a 1600 case with the doghouse cooler, 87mm jugs, singe port heads and a remote oil filter.

The question I am currently stumped on:

Is there any reason NOT to install a 3.5 quart extended oil sump for this engine in the st4b?

Has anyone here done such a modification and were there any things to look out for?

Thanks in advance for your time and suggestions.

tortoise7
off-grid on the east slopes of the Cascades
 
I looked in to several options and and left it as designed the extended oil sump is fro race engines where high g forces sling the oil. I also looked into dry sumping it and but ruled it out as oil can foam up in the cold on dry sump conditions. the reality is with a remote oil filter like mine you can add a full flow oil cooler if you need additional oil cooling you don't want oil temp to drop below 150 degrees. you get your best lubrication between 150 and 200 degrees.
 
Thanks for the reply Don,

I was looking not so much for cooling, but for prevention of oil starvation on long steep inclines and of course to have a remote spin on filter system.

My st4 with the industrial 126 engine has had no problem on the run that killed my st4b with a stock 1600, which on preliminary tear down inspection appears to have suffered oil starvation to the wrist pins on cylinders 2 and 4 along with a broken intake valve on #4.

As a side note, do you have any pics available on how you routed your external oil cooling?

Thanks!

tortoise7
 
the thing only holds 3 quarts of oil if you are a quart low you will loose a lot of cooling ability the oil should be changed every 50 hours the snow trac will spin out before it looses oil pressure on an incline side slopes may be a different issue I have never seen the gauge drop except for when the oil was low . also when building a new block a case with dual pressure relief valves will have larger oil galleys, and oil better when cold. the second pressure relief valve is actually a oil cooler supply valve so this also helps the oil warm faster
 
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