Eco mod my predator 459cc times 2

[oil pan 4]

I get a reading on my psid indicator. If I run the bypass valve wide open, when cold and take it up to about 2,800rpm and I get a slight reading. Yeah I think this filter is going to last a while.

[talia81]

Originally Posted by bwilson4web

From my Prius transaxle oil studies:

• < 1000 miles - early change to the left over manufacturing crap out.
• ~5,000 mi - dilutes the residual oil debris from what can's be drained out.
• follow manufacturers recommendation.

For an engine, I would divide all by a factor of 10 due to higher stress and heat.

Bob Wilson

I'm following this advice

[oil pan 4]

The stump grinders predator 459cc has bad oil after 10 hours. High iron, high aluminum and high silicon.
The lab couldn't get particle count as the oil was too dirty.
I'm going to throw the filter on there, run it an hour or 2 and retest. The filter I'm using catches 95% of 2 micron particles and 99.9% of 27 micron particles the setup will filter the oil around once a minute. So even after a few minutes, or by the time the engine warms up the oil cleanliness should be greatly improved. Shouldn't be much in the oil bigger than 5 microns after 5 minutes.

[Logic]

Interesting info on the velocity stack oil pan.
Any pics?

I'd love to know what a tuned length exhaust into one of David Vizard's Pressure Wave Termination Boxes does for a 1 cylinder engine, that you want to be efficient AND quiet.
ie: Lots of (free flow?) mufflers; A glass pack for high frequencies and a resonator for low and/or Helholtz or Quarter Wave Resonators. (especially for constant rpm engines) and ???

He gets into them around here:
https://youtu.be/J4w9fmb41Wc?t=1179


Then; if/when one of these engines gets old n smokey and its time for a rebore etc; it'd be great if you experimented with Boric Acid on it so others here actually believe me!
I've spoken on it some around here recently:
https://ecomodder.com/forum/showthre...tml#post695278
And have done it (to unbelievable effect!) AFTER learning all the ins and outs.