ixoye71

Hey - maybe this is the place to talk about this - I'm having a heck of a time with my GReddy turbo unit (with the blue eManage). Ever since the R-flash came out for the RX-8 (summer/fall '05), the car has run like garbage! It's terrible. Over 4000 RPM the car starts missing, sputtering, and running real ragged. I just bought the GReddy "R-flash adapter kit" and it doesn't help much. It raised the trouble point a few hundred RPMs but that's it. I waited almost 6 months for GReddy to develop this adaptor and spoke with them numerous times about it and now it doesn't help. I'm convinced that GReddy can't do much about it or won't put the R&D resources behind fixing the problem so I'm at my wits end about what to do. The car is virtually unrunnable at higher RPMs (where all the fun is!). Isn't anybody else having this problem? Can anybody help me on this one?

FABRO

Have you looked into a new EMS,( http://mazsport.net/store//page653.html )take a look at this. You just have to dish out the extra cash to buy it and find someone to tune it.

dannobre

iTrader: (3)

Do a search...there is a really good fix/thread on the E-manage and how to work with the shortcomings..........

ixoye71

My car with the GReddy turbo kit and eManage ran fine until I foolishly let Mazda upgrade my car's software to the "R" flash. Let me give you a little background on the "R" flash that Mazda did. It came out in the summer of '05 and it was a government-mandated upgrade. It addressed a potentially dangerous situation where overheating and possible fires could occur if the driver parked the car and held it at high RPMs for extended periods of time. That could overheat something (exhaust perhaps, I don't remember) and cause fires in the right environments. I believe that's where the 4000 RPM problem comes from, I suppose that Mazda put a fuel-cut-out in the program if the machine has a steady RPM over 4000. (I assume this because if I accelerate hard above 4000 RPM, it does OK until it rests anywhere - then it starts sputtering, etc.)

I know that some of us have had issues with this because I have discussed this situation with GReddy's R&D guys a bunch of times over the last 6 months and urged them to develop some fix. They said that many RX-8 owners were saying the same thing.

So - with that background - has anybody figured out how to fix this problem?

swoope

iTrader: (5)

might have better luck in the major hp upgrades forum..


beers

Petrus

The fixes found in this thread is not specificly for the R-flash, but doing these little modifications had helped other with the R-flash. I´d give it a shot.https://www.rx8club.com/series-i-major-horsepower-upgrades-93/definitive-greddy-turbo-fixes-here-they-81825/

rx-81688

I have the same trouble with the kit, of cours i also have the R-flash, and i also installed the dongle that Greddy said it will fix it. but no luck. i just wanna have fun, don't really care about how fast it gos. and don't want my engine to blow up, by the way i have a friend that just blow up his RX-8 last week with the Greddy turbo kit. i feel sad for him and also make me wonder are my gonna be next.
so if u guys find a easy way to fix it please let me know too Thanx

Petrus

Hmm, wonder why everybody seems to have problems with GReddy and the R-flash. I have the same setup and my 8 runs fine.
By yourself a wbO2 sensor and start logging the lambda and afr input. Then tune it or get someone to tune it for you.

two rotors

I am using Tims Severed 380 Map and it appears to be quite good on my R flash.I am not pushing hard during the break-in of my motor.The only thing I found so far is some jerkiness through 4500 rpm but only in 4,5 and 6 th gears under some load.After 5000rpm it seems OK in all gears so far.Idle is stable at about 850rpm with -60 kpa vacuum.

MadDog

^It lags in the 4500 RPM range because its tuned rich there. Without the rich tune, there is a very large lean spike as the intake runners open-up.

two rotors

I have changed maps and am now running a version of Mazda Maniacs map 02_03_06,with the timing map removed.This suits my car much better and is almost perfect up to 36kpa boost,which is where I am right now.
If you want independent confirmation of the drivability of my car,PM 'mikefrombarrie'.He drove it on Saturday.
You should also know I severed my P2 injector control,have an air recirculation valve and lines and I am using a 0.020" orifice in my pressure line to the Greddy boost sensor.I have had no CELS and my LTFT and STFT are very low.AF

two rotors

Ops sorry about that,myAFRs are below 12 under boost,~14.7 normal running and >18 when my throttle is closed.
I have to get another 400-500 km onthe motor before I can do anymore testing.

rx-81688

Hello you guys, 2 days ago i was on my way to houston TX, and 30 mins before i got there i blow my motor, now my car is in one of mazda shop here in town, old motor is $4700, an new motor is $7200, i don't know what im gonna do, help me, im very sad now also, and im plane to sell my greddy turbo kit, if anyone want more info pleases pm me or call me 646-707-1338 Bing. Thanx

MadDog

Real sorry to hear that. But could you give us any more information? What were you doing when it blew? What map were you running? What boost? What flash were you on? Were you running the kit as GReddy delivers it, or had you made any other modifications?

rx-81688

i was runing the kit with RP cat, HKS exhuast, pulleys, RB fly wheel, and i have the R flash, did't have an upload map, but i did got the greedy dongle that is for the R flash, i drove from memphis TN to houston TX, it's about 8 hour drive, i was babying the car on the way there, like every 2 hours i would stop and let the car cool down, and check my oil, but right before it blew, i just got some gas, and been driving for about 4 hours non-stop, and i did't hear anything, it just blow out alot of smoke like dust and star lose power, droping RPM, and . and im gonna get a rebuiled motor for about $3000, not gonna put the turbo back on. and i miss the turbo sound alot. i wonder if greedy would do anything about that?

MadDog

Sorry man. But don't expect any handouts from GReddy. Its just not going to happen.

Let me get this straight. You were running the GReddy map. You hadn't done any tuning. Did you have an AFR gage? You weren't accelerating?

Petrus

I would really like some more info on this scenario as well. The more details the better,

(Since I run a similar setup (turbo, flywheel, clutch, pulleys, catback, hi flow cat) etc and doing so on "R"-flash. I have begun tuning the beast and hopefully I´ll be able to post a fine tuned map for this here within a month or so.
FYI, when I loaded the map sent out from GReddy (the one tuned for a hi flow cat) the afr reading were above 21 and lambda was about 1,4. I do NOT have the R-flash-dongle from GReddy. I don´t think the dongle would fix the problem, just make it "less bad".

Fanman

Sorry but Greddy won't do anything for you. In dealing with Greddy lately I have found their customer service to be absolute crap. They will probably be blaming it on you. Not a company that stands behind their products very well.

OfficerFarva

Yea man, I had the exact symptoms u are having now when I first installed the kit. Local "tuners" ended up killing my car and I had to do a rebuild. I had Rotor Sports Racing repair everything, and they street tuned my car. It runs fine now, but before all of this if I gave the car more than 1/4 throttle it would bog down and lurch like no other. When we first dyno'd it like 6 months ago (this is when it died), it would not go past 4k w/o the most hellacious backfires and lurches. The R Flash and hte stock E-manage map do not get along whatsoever, and I heard that the R flash causes the car w/ the E-manage to run about 4 times richer than it's supposed to. My advice to u is get to a tuner who has either messed w/ this system alrdy or tunes rx7s alot, and have him hook up a wideband and correct ur afrs. Good luck, I know it's no fun drving the car when it acts like that. I also know that somber and humbling feeling and thought process of "Oh **** my engine is dead". Best wishes.

two rotors

I had a'late model' kit which came with 3 dongles already installed.The only modifications I made was to install a diode to stop the air pump running and sever the p2 injectors.I also have an air by-pass valve(instead of a blow-off valve) and the pressure tap for the waste gate on the compressor discharge.
Driveability is really good,and the car is very easy to drive slowly,transition to boost is very smooth.I never tried to run on the Greddy map,I used Tims severed 380 map 13.I have been running MM s 02_03_06 map recently.Typical lambda values have been less than 0.82 under boost and 1.0 during vacuum running.

As far as rebuilding your motor,$3000 could be inexpensive,for sure you will need one new rotor housing and a new rotor,3 apex seals.oil O-rings,water jacket seals as a minimum.You could also need centre housing and rear housing.Easily $2000 in parts. Be sure you have a cast iron agreement for the re-build price.

Petrus

two_rotors> Are you running the R-flash as well along with this?

two rotors

Yes,I had it flashed before I installed the turbo.

rx-81688

yeah i was running greedy map, don't have an A/F gage, did have an boost gage, and i was just cruising about 77 m/h. now i have to drive my s evo every day, the sound of her turbo make my miss my car alot, and the HKS bov. im still try to think if it's an good idea to get my turbo back on, my friend is getting the motor from mazda for me for $2800, and he'll drop it in the car for me, oh and i did had the dongle from greedy, and it come with an little thing that u hook up to the greedy pressure sensor to make the car run not as rich.

ixoye71

I can post an update on my situation. I did the #2 fix (putting the GReddy wastegate pressure pick-up right at the outlet of the turbo compressor) and that has helped a lot. It now allows me to rev up to 6K or 7K RPM without sputtering and cutting out. It has also reduced the popping out of the tailpipe. I am starting to think that one of the main problems is running way too rich. I think my next step is to cut the injector wires and have the GReddy unit control them directly. I will need a way to load maps into the blue box first. I'll post back later when I've done that.

rx-81688

Hello guys! have not been on here for a while. how is everyone doing and your 8's.
anyways, got my engine in my car now finally, crank up, sound's good at frist, but then it's missing very bad, and the greedy E-manage is not responding, i think that was the problem that my car blown in the frist place, so i need to get a new computer for it, looking at the intercepter X, what do u guys think, oh by the way it is going to be turbo agin lol i know, but this time i am getting to tune right, my car is at a shop call the SGP Racing in houston, they do tune there, so hopefully my car gonna be ok this time. any comments will be highly appriciated and wish me luck guys.
Thanx