Ranzo

I know I know it's the old Premix story again. Well the reason I bring it up is.... I was looking at the new issue of RE magazine at KSP yesterday and they were showing pictures of the Renesis rotor housing beside the REW housing.



The Renesis has two oil injectors side by side in the rotor housing as the REW only had one. The caption was talking about how the Renesis design was to better oil the side seals, something that the other 13b's were missing. To me this reinforced my beleif in premix because side seals would get better oiling by being in the fuel and touching every area that is involved with combustion.



Thoughts.........ideas??

kahren

whats you rpoint ?

White_FC

Funny you should post this, I was just thinking the other day how the stock MOP injected oil doesn't get anywhere near the sideseals on a normal 13b, I didn't realise the renesis was different though.



I doubt it would increase the life of the sideseals massivly, but im sure it would help the sealing abilities of the chamber ALOT..

Possibly this is the main reason people that run premix see a good gain in idle vacume?

BigTurbo74

you gotta think outside the box though. how the **** are you gonna market that won't pass emmissions stock? it would be super hard for the car company to design a system that would pass tests with a premixed engine plus tell the owners to treat it like a lawn mower. right?

ColinRX7

I wholeheartedly agree with bigturbo.. You can't market something like that. That would probably scare away skeptical buyers rather than attract them..

White_FC

No one here was saying we should treat our cars like 2-stroke bikes, of course not, thats just silly. No one would buy a car you need to add 2-stroke oil to everytime you put fuel in, its upto an individual owner is he wants to treat his engine better though.





Just talking about what is best for the engine really.. Which is exactly why every race 13b i've seen has run premix, including MFR ones ever since the 10a IIRC...

Ranzo

Yeah my point is that Mazda has seen some advantages with oil being on the side seals and rearranged the oil injectors on the renesis. This tells me that Premix is a good thing for those that are willing to do it. The reasons for mazda not using premix are obvious as we mentioned before.



I just thought it was interesting and wanted to pass what I seen along and thought maybe someone else had something intellectual to add. I am currently using premix with great results and after seeing that I am gonna keep on using it.

kahren

if its nto a paint for you to move your butt and use premix and also spend a few $ and use premix then its deffinately worth it. this is more important on high power engine, the apex seals wear out MUCH faster and high power or high revving cars so premix does matter. if you have somethign close to stock i dont think its worth the hassle to use premix, unless you want your rotray to last over, lets say 250k miles?

Lynn E. Hanover

I used to run 4 Ozs of crap dino oil and 4 ozs of Redline 2 cycle oil in each 5 galon can of 87 octane when we ran the timeing at 20 degrees. The crap oil was to kill off some more octane and get a faster burn.



Now with 27 degrees of lead I just use 8 ozs of Redline in 5 galons of 93 octane.



I just assembled an engine from pieces that are 5 years old. The rotor housings look like new, and the iron has a .002" wear step. Best power is at 9,400 RPM.



Racing Beat really lays on the oil in their 3 rotor 900 HP airplane engine.





The picture is a scratch built rotary on the Mazda sizes for aircraft use by Mecanair

(Swiss).





Lynn E. Hanover

j9fd3s

racing beat had some housings on display that had 2 oil injectors, like the renisis motors.



not all of the mfr engines use premix, the 787b has a metering pump