Im getting new rotor housings for my rebuild and I saw that mazdatrix does this treatment. Its supposed to reduce wear and friction. Anyone have experience with this? Does it really work?

 

referring to this?
https://www.rx7club.com/race-car-tech-103/water-jacket-weave-porting-936073/

if so it does work to an extent, FD's have the ports milled more to better cool this area as well as their race engines, in most street applications i would call it unecessary though unless you are building for over 400WHP and doing endurance racing or track driving.

as far as wear goes, simply switching to premixing 2 stroke works better than simply doing this as far as engine longevity is concerned.

 

i see you're referring to the bead blasting process, which is pure BS and lies.

 

Cool. Thanks. I was more curious thanh anything. I don't plan on getting to 400hp. Maybe 350 max buT that's all.

 

If we're talking about bead blasting, that's basically shot-peening the side housings, right? I would think that could improve the wear characteristics a little because small local deformations will take advantage of the work hardening process of steel, but doubtfully help friction much. If you wear the irons down enough that they're no longer reasonably flat you'll have cut through the hardened surface anyway. I doubt it's worth the cost (however much it is) since the side housings usually wear the best out of all the major parts.

Or are you talking the main housings with the chrome surface? If that's the case then idk, Karack certainly knows more about rotaries than most of us. If they're new housings then I don't see any reason to have them bead blasted, but if they're used then I suspect it could possibly do some good as long as it worked to eliminate any chatter marks that were present, but that still sounds iffy.

 

they claim that shot peening the apex seals and seal slots reduce wear. i certainly doubt it, i'd almost bet that it INCREASES wear. yes, the gaps will hold lubrication better but once worn then what? increased tolerances which promote even more wear. if they make those claims then they should also require additional internal lubrication such as excessive premixing tables.

i just assume that people build their engines with the OMP retention in mind, if not then i ask them up front so there is no confusion as to what the best path is for their engine. the OMP is a rather poor internal lubrication device. most of the oil barely lubricates the center 1/3 area of the apex seal leading edge and slot, the rest turns to carbon which has a negative effect on reliability.

 

That's why I started premixing instead of using the stock OMP or even RA's adapter to meter clean two-stroke into the motor through the stock oil injectors. I wanted a more even distribution.

 

I heard it works good on the sideplates.. to reduce wear...