Anyone know any good rotary shops my 05 auto rx8 Shuts off when I give it gas from a dead stop and will only restart after I let it cool off for 10 minutes. It does this after 15 minutes of driving. Car has new coils, plugs and wires as of 10 months ago. I took the car to dufferin Mazda so they could look at it and they wouldn't touch the car because I have no Cat.

If you want to take the car to a dealership, I've heard really good things about Mazda Toronto, and personally have good experience with Scarboro Mazda. If you want to take it to a shop, Mazdee's in Pickering is always a safe, no bs bet.

MazMark is also a safe bet... he's the dude that rebuilds Al's RX-7 motors. Plus he's just around the corner from Scarboro Mazda..

hehehe
http://i848.photobucket.com/albums/a...h_DSC_0028.jpg

click on the pics/
http://i848.photobucket.com/albums/a...DSC_0028-1.jpg

I will post the rest of the pics from the day when I get my crap together. Got home to a flooded basement = submerged home studio. Shouldn't take too long though.

http://a.imageshack.us/img96/8986/dsc01761qj.th.jpg http://a.imageshack.us/img717/5259/dsc01760g.th.jpg http://a.imageshack.us/img408/5868/dsc01759qb.th.jpg
http://a.imageshack.us/img130/3739/dsc01766e.th.jpg http://a.imageshack.us/img576/26/dsc01765q.th.jpg
http://a.imageshack.us/img295/5586/dsc01770o.th.jpg http://a.imageshack.us/img231/3250/dsc01769p.th.jpg http://a.imageshack.us/img683/6736/dsc01768ug.th.jpg
http://a.imageshack.us/img534/8140/dsc01764bb.th.jpg http://a.imageshack.us/img299/2691/dsc01763k.th.jpg http://a.imageshack.us/img841/5756/dsc01762h.th.jpg

booya ... great pics guys

Finally got my access port damn I hate Canada post any ways car runs and Idles great now.

sweetshitdude! My car is also running very dreamy.

What should the throttle position be at WOT, I logged mine as maxing out at 67% in a 3rd gear pull to redline on the highway.... is this typical? I think I was getting near 200g/s only also but i'll have to double check that one.

67% is normal for WOT :dunno:
Pull the accordion tube off the intake, turn on ignition - don't start the car, set WOT and make sure the throttle plate opens 100%.

If you're only pulling 200g/s then you have the same issue I have :(

Here's some data from my AP
https://www.rx8club.com/attachment.p...1&d=1281372040

Not sure exactly what you mean here, you turn ignition on, dont start it, then push petal down and get someone to open the throttle plate 100% or what?

Have you found the cause to your low g/s? I'm going to try cleaning my maf + throttle body on the weekend.

Have someone hold the gas pedal down all the way and observe the angle of the throttle plate. It should be 100% open

I still have low flow and still have to check the shutter valves.... All the other checks have been done

^ So even with the log reading 67% the throttle plate is still physically going to be 100% open when you look at it? I'm still pretty new with the AP so I gotta play around with an actual data log on my computer to get some for sure numbers for my MAF.

Yes.
Post up a chart from your datalog

I'll play around with it tonight

So here is my data log from tonight; ambient temp of around 70F. I'm doing the same as you, logging about 195g/s max. Car is a 2004 MT with about 25000 miles on it. I did do the throttle body bypass mod but I dont think it would effect the low g/s.




Attachment 160597

I've done the TB coolant bypass.
It hasn't seem to impact anything for me.

Will post log/graph later

Only other things I could think of would be... De-walled intake, took one screen out, K&N drop in that probably needs to be cleaned but I'm trying to get away without buyin more cleaner cuz the turbo install in Sept. Might just do it now for interest sakes.

When do you plan on checking the SSV's? Are you going to check the Auxillary valves and VDI valve as well?

My graph looks almost identical to yours... logged the exact same data

WCS and I will attack it with seafoam first, probably tomorrow night.
After that we'll reserve a weekend to pull things apart.

We're thinking SSV because the power impact is in the SSV RPM range

I just cleaned out my K&N tonight, wasn't too dirty, was only in for about a year, 5 months of which it was parked for the winter. I'll log my MAF tomorrow when it goes back in. I dunno about you but I don't think I'll need seafoam, I only have 41xxxkms on my car... but it is a 2004 so who knows.

Yeah I didnt look for a healthy graph to compare mine to so I didn't see when the MAF started to drop below par. Lemme know how the seafoam goes and if not looking forward to the SSV check.

I got a 196 hp and 137 torque at the dyno day and I was only getting 209 g/s on the Mass Air Flow.

I cleaned my K&N drop in and re-oiled it, did another pull, logging 197g/s now, 2 more than Monday with about the exact same ambient conditions. Maybe I'll clean my TB and MAF when I get a chance and see what that does, prob not much because of my low mileage though.
Wish I had a dyno for mine not sure what it's got for whp. How accurate is the dyno on the AP? I did 5 runs with that and got between 195 and 205 whp. My car is pulling great, feels good but I would love to have that extra 15-20 g/s that I seem to be missing before I install my turbo next month.

lol and if you right click on ur MAF line in your Excel graph then select display data on secondary axis or something like that you can make an axis on the right side of the graph.... took me forever to figure that out, don't know if you knew that or not but a handy tip for logging alot of different data.

Your calculated load hits close to 100%
Ours never get close

Hey yeah ... um I see that now...
Well what the hell would cause that?

I'm mean isn't the dyno responsible for the load?

I think you can still reach a 100% load even if your g/s is low.
I can't recall at the moment how load is calculated....... haven't had a coffee yet <yawn>

Calculated load uses
Engine Displacement, Measured Air Mass and Engine Speed

Darkbrew maybe we should try swapping out your MAF?

I would have thought the mixture would go way off if the MAF was bad.... The MAF cal done on the dyno should be good, shouldn't it?
The dyno says I'm way down on power....
Still thinking SSV.
BTW, the car idles really nicely with everything cleaned up.

See I don't think my car is down on power but that could be a combination of maybe it has been down since I've owned it and still amazed by how the AP really livened the car up..... any of you two know the accuracy of the Dyno program on the AP?

Not sure of the accuracy but I can give it a try tonight since I have an actual dyno run to compare with.

My car feels strong and runs well in normal driving but the dyno doesn't lie! Above 6K the HP and torque curves are just wrong!

I agree those numbers are quite disheartening... I'm amazed that the AFR readings on that dyno are so lean though! I tend to dip into the 10.9 range at WOT at certain rpms but I am only running MM's base NA map for now, I'm assuming you have had some custom maps sent to you already?

That be great if you could see what you get with the AP dyno so I could get a comparison and see it's accuracy. WCS could you also do a couple AP dyno runs and let me know what you get?

Sure I can do a couple of runs.
I've used it before and didn't feel it was too accurate however that being said I do NOT know if it is calculating the hp and torque at the wheels or at the crank.

I guess we'll find out when you log yours... you should be around 237bhp if I factor in a 21% drivetrain loss. 200*.79 = 158.... so if it is bhp that means I'd be sitting at 158 whp, hopefully it is measuring WHP then. But for some reason when I did my pulls I thought it said horespower at the wheels somewhere, but I can't remember and I'm at work.... I'll hit up the Cobb website.

Didn't specify on Cobb website

Cobb Dyno runs ...
Settings
Weight run 1 = 3389 lbs
Weight run 2 = 3589 lbs

Gear 4

Start run = 4000 rpm
End run = 8750 rpm

results 1 = RPM = 8429 Tq = 870.81 Hp= 1418.13

result 2 = RPM = 8036 Tq = 233.6 Hp = 357.43

I guess something is a miss.
If you review the log files you can see some strange reading in the upper rpm band. My guess is that the data bus just can't handle the polling frequency from the cobb.

Anyways it would still be good if it was consistent even if it wasn't correct.
That way you could gauge an improvement.

For example even if the cobb just gave results in the number apples ....
As long as you keep getting the same number of apples then you have a standard.

Make a change to the car and see if your apple value changes.

Alas this doesn't seem to be the case.

To many variables ..... road slope, weight, wind, ....

I did a run in 2nd from 2000 to 8950 RPM

got 395 HP and around 300 lbs of torque up over 8000 RPM

I wish!

Maybe it has to do with gearing??
Edit:
I'll have to download my datalog...

Looks like WCS made 228 @ 7800 RPM on AP

yeah i didnt data log my dyno run but the max that it displayed on the AP screen at the end was between 195 and 205 for 5 different pulls, it got me thinking that it was pretty accurate but I dont know if it averages it or what... I'll have to do a pull and data log it to see for sure. I guess from all this logging of different parameters we still know one thing, Darkbrew and I both have low g/s haha.... this is rattling me

Just go to a real dyno,the cobb dyno is not accurate, too many things will affect the result.

So I did some reading and checked out a few things.
The VDI and SSV valves move freely
But we could still have bad air solenoids, actuators or bad control signals. Must get a vacuum tester.
Next thing is to pull the APV motor to see if those valves are moving freely... Then check the motor function.

^^^^ Agreed shaojie
That being said, dyno shops are rare when you live out in the country (me)
And unless you could keep using the same stretch of road over and over without getting thrown in jail.....

Also I'm not sure how Cobb does the math, does it consider the gear ratio correctly, what is the weight of the car and how accurate do you need to be with the weight value.

I'll try some 3rd gear pulls today.

It would be nice to lay down some steady repeatable runs. Then make a change and see what the delta is from the new value.

haha all that seems a little over my head to do on my own. I'm almost tempted to do a NA dyno for comparison when I get back to Saskatoon from my summer job... I'm also out in the middle of nowhere; but $100 or whatever it will be to dyno is pretty pricey for a University student.

I thought you were thinking it was the SSV valves; what do you mean by they move freely? You actually got in there and checked them?

What about the VDI sleeve valve.. maybe we are just loosing g/s in the last 1500 rpm up top

I was on a fairly flat section of secondary highway where I was able to turn around and use the same 500m stretch each time (it's not hard to find out on the prairies)... out of 5 runs they were all consistently within 10hp of each other (195-205hp). All 3rd gear pulls with my weight set to 2999lbs so the hp reading would have been a bit lower just from using a lower weight as well.

Yeah, that's what the APV does... 7250 and up.

The SSV is air actuated and I was able to move the mechanism easily. Also the VDI actuator moves freely too.

There are pictures in this thread. http://elworth.info/html/rx8_fuel_injection.html

^ Yeah I understand what all the valves do, just physically gettin in there to check them... I'd have to read up on it all.... and I think VDI is 7500 to redline. But I follow ya, all that is left to check is the APV's and if those are moving freely then solenoids and actuators. I guess there is potential for a small vacuum leak also.

Comparison.
 

Here are my logs plotted against logs from a healthy RX-8
Recorded on Dyno day.

Interesting.
It appears that the g/s separates around 6500 rpm

Could it be possible that its only a partially failure of the SSV?

Well, I'm going to use my new vacuum tester to verify operation of the SSV and VDI including the hoses.
Also we'll pull the APV motor later to see if it's working and the port mechanism moves freely. (need to put the car on stands again!)

^^^ LOL
Ok I let you do it this time, nice and easy