Piston Squirters in Type IV, Interesting Stuff Options

[Brian Mifsud]

Have always wondered if spraying lots of oil inside the valve covers would be worth anything which has lead me to investigate the world of "piston squirters".

Here's an interesting assortment of parts used on BMW's and other German Makes:

http://www.e30m3performance.com/installs/i...ls-3/squirters/


And I really have to admire this guy... he made his own system including the nozzles from scratch for his Volvo Turbo:

http://www.pbase.com/polc/sqrt



When BMW redesigned the R100's into the R1000 "Cam-In-Head" flat twin motorcycle engines, they got nicknamed the "oil heads" because that was the major source of cooling for this otherwise "aircooled" engine.

Of course, if you can't get the oil to circulate around the exhaust valve guide on the Type IV, there probably isn't any point to pumping additionally "cooling only" oil to the heads..

Some food for discussion..

[Jake Raby]

Actually the delivery of oil to the rocker area is never an issue- many times its a problem... Most of the time at high revs too much oil get to the rockers and doesn't get back to the sump fast enough and the kills rod bearings...

In most race applications we weld the tips of the pushrods closed and deliver the oil through rails fited into the valve covers and fed from the main oil galley.

These rails incorporate solex main jets and allow the oil delivery to be adjusted infinately... This along with a valve cover equipped with a window gets the oil in the valve cover area just where it belongs- These squirters can be aimed directly at the valve guides and springs for superior lubricating and cooling.

I use piston squirters on many of our race engines- BUT with thermal barrier coatings and friction reduction coatings their need is drastically reduced.