Originally Posted by reni04 (Post 4656150)

Thank you for the answer. I am going to study it a while and i'll come back this summer with the result as its 20 degrees here today and the weather doesn't allow for rx8 wwork in winter.I thought it was possible because i reasoned it issn't altering the OMP in any way just where the oil comes from.I only bring this up because the jury is out yet on weather or not the sohnen adapter has any adverse effects oin the OMP , as i stated before Mazda didn't design the OMP for any piggy back applications did they?.I'll be back on that project in the spring.

I already have a stainless steel container i will modify .The hard part is how to attach it to the car at the same level as the crank case.Sounds like a fun venture and can cause no harm aside from inventing a few new cuss words in the process lol.

Originally Posted by 9krpmrx8 (Post 4656241)

Is the Jury still out? Since when is that even a question? The SOHN adapter is a very simple device that has been in use for years on both the RX7 and RX8 without any adverse affects. The only downside I can see to a SOHN adapter is the hassle you would get from the dealer if you are still under warranty. Other than that, it has no adverse affects on the oil metering system at all. Clean cool 2 stroke versus dirty 4 stroke engine oil seems like a no brainer and the only reason there is no reservoir (like Mazda has done in the past) is because most owners are too lazy to even check the oil level between changes, let alone add fluid to a 2 stroke oil reservoir for the OMP system.

And I agree, you can never change your oil too much. In addition, adding oil between changes is critical. You want to make sure your OMP system is working right and that you are consuming oil at all. At ever Texas 8 event I was always blown away at how many owners did not check their oil level when we filled up at different spots during the day, some because they didn't even know you needed too and some just didn't think it was important. I typically use a full quart of oil after 100 miles or so of hard charging thru the canyons and we normally did about 350 miles total during the day.

Originally Posted by BJP (Post 4658952)

Now I don't have my Sohn Adapter hooked up yet, but logically its a no brainer. I will be running the Sohn adapter and premixing as well this summer. It may be overkill on a stock Renesis but if you love your car and want to keep it around longer, why not?!

Originally Posted by xKp5609x (Post 4678582)

So after some experimenting and discussing with a few people on a FB post about SOHN not being a pressurized system, just curious on SOHN results and such?

Who has a SOHN?
What mileage installed?
How many miles now?
Compression results?
Any motors with SOHN install needing a rebuild yet?
What 2-stroke oil, and why?

Originally Posted by Smutterbutter (Post 4678398)

I saw the question come up a few pages ago but never got addressed. I'm intalling a sohn adapter with new oil metering lines and when everything is tightened down they are TIGHT against the thermostat housing and alternator bracket. What's really worrying be is the lines rest right on the thermostat housing gasket thats protrudes about 1/8in and I can just see them getting sawed in two over time. How does everyone route their oil metering lines after installing a sohn?

Originally Posted by xKp5609x (Post 4678582)

about SOHN not being a pressurized system

Originally Posted by dannobre (Post 4678922)

The Bolts are M6....I can have a look when I get home if you need measurements

Originally Posted by ShellDude (Post 4678622)

Oh perfect. Let's leverage the collective wisdom of rotary Facebook groups to make an informed decision about the sohn.

This will definitely end well.

Originally Posted by 9krpmrx8 (Post 4678597)

I have had one for 6 years or so.

25,000 miles (since engine was rebuilt, also had it for 30,000 miles on my laste engine)

Recent compression tests results were 7.9's or so.

Yes, my last Mazda Reman died and had a SOHN installed but it's failure was related to a failed coolant seal. A SOHN adapter won't prevent you engine from failure, there are a lot of factors involved and several modes of failure.

I run a JASO FD rated fully synthetic 2 stroke oil.

Originally Posted by xKp5609x (Post 4679147)

No need for sarcasm... If youre not willing to discuss, you dont have to comment.... None the less. How is the stock system not pressurized? Since the oil gets its feed from the whole pilong system which obviously has pressure, the MOP since its not actually a "PUMP" is being fed oil with combination of vacuum effect. But because the the oil is fed from engine in the front cover, would that ammount of pressure increase flow to the MOP stepper, rather than a gravity fed SOHN? Plus there are other people who have track cars who noticed this at first.

Originally Posted by ShellDude (Post 4679172)

One cannot fix stupid.

You do realize the SOHN adapter was originally developed for rotary powered aircraft?

Originally Posted by RIWWP (Post 4679175)

Whether the supply is pressurized via engine oil pump pressure or via gravity... it won't change the flow through the stepper. It's part of the concept of a stepper motor type pump.