Ouch. Overheating a rotary is very bad news! Overheating is like detonation. You might get away with it several times or you might not once. What can happen is that the rotor housings expand too much and warp in relation to the other housings causing permanent water leaks. When you take an oil pan off of a previously overheated rotary, you can tell just by looking at it if it has been severaly overheated or not. The bottom of the rotor housings are typically miscolored. If you haven't had any issues then you got pretty lucky. Don't do that again.

 

Right at startup, especially in the morning, I never take it past 3-4K until its fully warmed up. This warping scares the hell out of me.

 

Indeed, though I've no idea what factor was actually used. The conditions of the run are on the site hosting the dyno sheet. Very briefly: Texas, Garland (for altitude); 78ºF ambient temp; baro-pressure: you can probably look it up on a weather archive as well as humidity for the dyno pull date (once more, I think its on the site hosting it...)

The result is the result of 3 pulls.

 

it wasnt bad . in fact it was back down to normal temps i just a coupla minutes- by the time i got off the dynp. no cel and car ran fine right after and all the next day including another hour in a parade and then all the way in the 6 hour drive home. but you could see the timing being pulled as it was heating- i just wasnt paying enough attention-first time on a dyno :o course i had everyone and their brother and his wife telling my wife about it the next morning .....

 

I went to the dealer who's name I will withold until it is actually over. So I go in there ready to jump on the guys desk and pound my feet but I get no resistance. The service writer has an Rx8 himself and doesn't argue with me that I'm down on power. I hadn't even showed him the dyno sheet yet. He just wanted me to get an appointment for Monday. I then showed him and he looked at it and said to bring that with me next week.

I couldn't even get mad, he was to nice. So I thought as long as he had an 8 I'd sell him a shifter. :D No interest from him not even a word, just a smile. So I'm going to put a kit in my car over the weekend and not say anything about it. Lets see if he test drives the car. I don't know if he will or just turn it over to the shop. Either way someone is going to drive it and notice.

Meantime I wanted to try some other things and none worked out. Looking at the dyno it looks like the secondarys or not opening. You can see it going down at 6200 then it gets a little bump up at 7400. Is that when the terciarys open? OK I cant spell it, you know what I mean. I will not be insulted if you correct me.

I will try again with this damn scanner, It just has no room to go. The only thing I can do is put it under the trash basket. There are so many electronics around this one corner?????? I could organize but then I couldn't find anything. I already bought the damn thing weeks ago. I tink I may have lost the software already. Just kidding. :p

Going out to dinner in a little while, 30 min drive, 20 of it through a great canyon. I'll let you know what I think. Hint: I know this canyon really well. But even though I have been driving it since high school I don't drive like I did back then, just want to see what a reasonable person can expect from it.

 

I'd apologize for being off-topic but since this thread is at least 1/3 about aircraft and their propulsion :D I'm curious, do any of you jet guys know any interesting stuff on the Williams Research F107-100 or F112-WR-110 turbofans? I'm just a monkey that turns wrenches so we aren't allowed to work on them but we work with them a lot.

 

I havn't screwed with the scanner yet so you can't see it but I think I asked befor about the secondarys not opening?????
Anyone?? Can this be happening?

Drove the car over to the beach last night, very nice run for this car. I find it best to keep it reved up around 4000 min in order not to get cought out. Never really had to use more then 7000 for spirited drive.
Going to install a shifter in it today. Should be interesting, I will take it again on a canyon run.

I like the lighting alot. Might want a real high powered driving light as an option for desert driving.

 

i dont think its going to be the secondaries Richard. its probably going extremely rich as the secondaries open. and if youve seen hymees maf graph some cars seem to have a harder time overcoming the the pressure change when the sec. open. have you reset the KAM?

 

What's a KAM?? I know what a CAM is.
It is going down to 11.2 AFR at 7400
it starts to fall at 5600 it runs about 12.3
hits 12 at 7000 stays around 11.5 to 8000

the power starts to go back up at 7300. there is a dip there.

everything looks normal up to 6200. Isn't that when the secondarys kick in??

 

read mazdamaniacs post here https://www.rx8club.com/series-i-tech-garage-22/ecu-clear-reset-27548/ post number 3

 

I attached 2 graphs from logs I took under the same conditions. Both were done with the M calibration during the same day & during the same run. I have the pre & post run conditions on all the major components that can be logged via CAN (baro pressure, temps, etc...)

I also remember there were quite a few threads dealing with these kind of logs when the CANScan craze started. I don't know if these are of any significance...but...

 

in the first graph there is someting wrong with the maf line. there should be dips at the port opening rpms,

 

Well, there are -dips- @ 5500 & ~6500. Maybe I am one of the lucky ones with a proper MAF & fully functional (or not!) secondary & auxiliary ports. :o The scale maybe to blame if they don't look too apparent.

 

Here is my basline run. Looks like a roller coaster.... Stock PCM. Does this look like the same dips you are speaking of?

I was telling the engineers here about your project. I think they are very interested in what you are doing.

 

They may have a smoothing program in there. I wish Hymee had left a scanilizer with me. It would help find my problem.

Nemisis, my AF looks a bunch better then yours. I bought another scanner for my computer and it doesn't work either. Does anyone out there have a fax and a scanner both. I could fax this to you and you cauld post it for me.

 

i do. pm sent.

 

here's hymee's graph i was talking about. the yellow line is the mafs voltage i.e airflow.

 

Can you send to an Aussie number?

Andrew

 

i guess yours look about the same rx8-tx. your graph is just a little smoother over all

 

Zoom44, is this graph from hymee showing a car having a hard time overcoming secondaries opening?

Where is this evident? If I am reading it right then I am guessing around 7200 RPM in first gear is one point.

Also, sorry to sound dumb but what are we talking about? Secondary...intake ports?

Andrew

 

It doesn't answer though. It will auto redial in 12 min.

 

If Ajax doesn't work I can.

 

wtf.. gimme a sec.
it's my parents' stupid fax.. it says "receiving fax" on it too.

 

it's setup to answer.. lemme turn on the speaker so i can hear what's up

 

Says it went throgh on my end.