Metal-on-metal looks pretty clean.

 

when my 1st engine went out in 2008, i had just started using MMO for like a couple of days. I ended up having a broken apex seal, but everytime i see that red bottle i cringe!

 

Well clean housings can be bad if the MMO attacked the oil film right? Just added 8oz of Lucas 2 stroke to my tank at lunch

 

It looks like MMO is a really good solvent for built-up carbon crud, so it makes sense that it might help out if you've got a buildup. But at the same time, it might be possible to have "too much of a good thing".

 

Were you using oil via the OMP at the 'normal' rate ?

 

Crap I have been using a 50/50 mix of 2cyc and MMO at 4oz a tank it must be time to stop I just heard thats what the aviation guys do my bad

 

Mazda Maniac what the hell man how do manage to be around so many boobies all the time and with a camera no less. You truly are doing the Lords work

 

I assume he does since that engine was fairly new at only 15,000 miles.

 

So if the engine looked really clean inside but the engine died because of a fuel injector issue, how was the MMO bad? A clean surface isn't necessarily one that is wearing down quickly. If there was no lubrication and it was pure metal on metal contact, you'd know it.

I'm not saying that I recommend MMO. I don't use it and never will. However I'm not going to base any conclusions on an engine failure from a fuel injector on how clean the inside was due to premixing. Regardless of what it was. Then again how much carbon did they expect to see at 15K miles?

 

All good points, this thread has to be taken with a grain of salt like most others. Close up pics would let the builders in our community figure out a lot.

 

I think MMO is fine for a premix. In one of my first gen rx7s, I installed a rebuilt series 4 13B, and blocked off the oil metering pump. I premixed exclusively with MMO, 1 oz per gallon. That motor had around 35K on it when I sold the car and still ran like a champ. The motor was built using used housings by the way. There are some pretty through threads on rx7club talking about using MMO as a premix.

If MMO did not work as a premix that motor would have failed LONG before 35K.

 

Could not really get by this morning to get my pics but tech says he has some on his cell and will see if he can load them to a comp and email me. My last engine did have the reflash and on my newest engine he turned up the omp a little bit more. Once again im not sure how much carbon is supposed to be in a 15k engine but he obviously thought it was way too clean on BOTH rotors and housings. I believe thats what led him to believe the premix might be an issue. Two of the seals on the front rotor were blown so it failed compression test all around.

front at just below 300rpm 2.0 2.0 2.2
rear at just below 300rpm 7.0 7.4 7.3

 

BTW, I think you mean "you're" and "woman."

 

Its a joke with a local member and i even get PM's about it lol. Making fun of the **** poor grammar and leg humping that goes on in this forum.

 

mmmmmmmm leg humping. I know what your saying I was slammed for making my own exhaust instead of buying one from certain vendors they ate my thread up and **** it out so much for being inventive

 

Yeah, it's a joke, yeah, that's the ticket. He probably stole your engine and hid it in the shed in his backyard as a joke. He'll sell it on Ebay pretty soon as a brand new pristine engine with absolutely no wear. Ha ha. Yeah, that's the ticket, he stole your motor, and he's going to put in a race car and probably win the 24 heures du Mans.

Just funnin' with you.

 

But I do love this site I have got a lot of realy good help on many diffrent issues it has made me a much better 8 owner

 

How was this accomplished? The OMP is controlled by the ECU.

 

thanks again dude for sharing what has happened
I do have a tendency to follow the rotary aviation guys somewhat when it comes to some issues--one being pre mix. believe me they do not want to be at 5K feet and have anything go wrong. A lot of them give MMO a good rating.
OD

 

^THIS

Keep in mind premixing MMO is nothing new when it comes to a rotary... its been done for ages, long before the rx8 came out. READ RX7CLUB.COM PEOPLE. It kills me to see many many rotary issues that have been totally figured out on RX7CLUB eons ago and over here people keep trying to reinvent the wheel.

 

He reflashed my ecu.

 

Oh so he didn't "tune it" he just installed the latest flash. Got it.

 

So, we have a ECU that was programmed with the older lower OMP rate.
It seems there are too many variables to blame one thing for the damage to the engine.

 

older rotary engines from what i understand are... quite different.

no different from piston motor to rotary motor. just because it has same basic concept does not mean newer generations will take whatevers of the past years with equal success.

this subject being on a fluid, just as all fuel are just fuel... would you pump leaded fuel into an rx-8?

LEAD, act as an lubricant... but you think we can use that stuff without affecting the cat, then everything else? with just ONE single component in the way...

didn't think most older engines suffered valve seat failure due to a change in fuel formulation in the 70s?

think again! just wanted to clarify that these two engine designs behaves VERY differently.

 

There is very little different between the motors. It is still a 13B. You have shorter apex seals, solid corner seal inserts, revised side seals, and side exhaust ports. Water jacket moved back to the rotor housing, and two oil injectors in the rotor housing instead of one, a revised front cover design, and 10:1 compression rotors. There's no magic behind it.

None of this has any effect to how well MMO will premix in any rotary engine in comparison to the renesis. It is EXACTLY the same.