Hello everyone, my name is Benny and I work for the R&D department of GReddy Performance Products. First of all I would like to thank you all for supporting our products. I am writing regarding an update for the plug and play harness for the RX-8 turbo kit. Over the past couple of months TRUST Japan and GReddy USA have been doing testing to find ways to remove the check engine light codes P0410 and/or P0131. We have come up with a simple solution and it is now ready to be shipped to those who need the update. Just for your information, this check engine light will not affect the drivability of the vehicle in any way, as it is a code for the cold start emissions. The performance of the vehicle will not be changed by removing this check engine light.

There are actually three different harnesses out right now. The people I need to get in contact with are those that originally had two black adapters on the plug and play harness. Please confirm whether you have two adapter on your plug and play harness where it plugs into the stock ECU. If it does have two adapters, email me at tech@greddy.com. Also please include your emanage serial number in the message. The Emanage serial number is a 5 digit number on the bottom of the emanage case. The update for this kit is the addition of a third adapter on the plug and play harness. I will email instructions on what to do next after you send an email with the emanage serial number.

If your plug and play harness originally had three adapters and was purchased before June 1, please contact the authorized GReddy Dealer you purchased the turbo kit from for an update harness. I have already sent out the update parts to our Authorized Dealers, so please contact them for the update parts. I am only handling the harnesses with two adapter on them at this time.

If you purchased your kit after June 1 and you do not have any check engine light, you do not need to do anything. The last batch of plug and play harnesses have these updates on them already and do not need any modifying.

Thanks again for choosing GReddy Products!

Benny

 

thanks for the information benny.

 

Is that the "Secondary Air Pump" CEL's codes?

Nevermind, just found the code listing....
P0131 Front HO2S circuit low voltage ON 2 HO2S
P0410 AIR system problem ON 2 AIR system


I've believe my update is on it's way. MZM in Austin talked to you about it last week. Thanks,

 

glad to see greddy didn't drop the ball...maybe fumbled it..but it seems they are making a nice reovery D

i soooooooo want my FI damn poorness

 

Benny, for people who purchased a kit near the 6/1 cutoff, is there a way to identify the 3 adaptor harness or eManage unit as pre- or post-fix?
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Child health advice

 

That is correct. I talked to Mohammed and got that update sent out last week. It should be there this week sometime, if it has not arrived yet.

 

Is this at all related to the air pump remaining on for a varying, although around 10 second, time period after the car is shut off?

 

[QUOTE=army_rx8]glad to see greddy didn't drop the ball...maybe fumbled it..but it seems they are making a nice reovery D

Yah, sorry it took so long. I actually did not expect it to take so long and I apoligize for that. I did not want to post anything until we were sure we had the fix and the parts were available. And fortunately they are available now. Thank you all for your patience.

Benny

 

I wish there was an easy way to know, but unfortunately the only way to be 100% sure is to know when the RX-8 turbo kit was purchased from us by our Authorized GReddy Dealer. The last shipment of RX-8 kits came in on May 31, and most kits were shipped out within a couple days. If the kits were received by our Authorized GReddy Dealers after June 1, then for sure the kit is the latest and does not need updating. Either way, the Authorized GReddy Dealer should know if you kit needs the update or not, as they all are aware of the situation. Best thing to do would be to contact them, as they should know which kits you have.

Benny

 

Actually the third adapter does cause the pump to operate for a moment after the key is turned off, but there is nothing to worry about.

Benny

 

gotta love greddy.....and benny is the man...i had an issue with an exhaust on my old car and he took care of me in the best way.....thats why when i get my fi on my 8 its greddy all the way....they sure as hell stand behing thier products and take care of the customers!

 

I agree 100%. I even like how Benny and Greddy took the initiative and posted this on the forums. I think it adds a bit of personal touch to the business side of things. Kudos Greddy.

 

This is very good to see.
I have to agree with most of the posters above.
I think we might wanna sticky benny's original post.

 

Benny, I had a couple more questions about the kit.

- What exactly does the temp dongle do and would it cause problems if removed. I had mine off for awhile and it made the shifting alot smoother, and less hesistation. It's back on per MZM's advice before I get it dyno tuned.

- About the boost dropping off at high RPM's, is that due to back pressure? I've got a boost controller and wanted to know if it would be possible to keep 6-7psi throughout the RPM range.

- I've installed one step colder leading plugs (RE8A-L from canzoomer.com), are they needed?

 

Yes Kudos to GReddy. And not to thread jack, but is it pronounced gee ready (because of the capital R) or gredy? I've heard it both ways.

 

Hey benny glad to see ya online, thanks for being there for us, and me Rich from you know where...

 

The temp sensor adapter is actually very important in tuning the RX-8. As some of you may know, even during wide open throttle up to mid range RPM, the RX-8 ECU is still running in closed loop operation. During closed loop operation the ECU will continually be making adjustments to reach its target air fuel ratio, which is way too lean for a turbo kit. Also the A/F sensor technology is new and advanced on this vehicle so it reacts extrememly well to rich/lean conditions to get to its target A/F, which is generally stoich (14.7 to 1). Well, with the stock ECU making adjustment around mid range RPMs, tuning the Emanage was pointless because the A/F would change and get leaner. Also I must add that the intercept point (peak boost) for this is in the range, so it is manditory that the A/F ratios are safe and adjustable at this point. We used the VTEC switch on the emanage to enable the temp sensor adapter when any positive pressure was detected from the GReddy Pressure sensor. This switch causes the ECU to think it is colder and run in open loop operation so we can make any adjustments we want without the stock ECU making adjustments to lean it out. I am sure MZM can tune it to make it run beatiful. They will call me if they have questions.


There are a lot of reasons why the boost drops at high RPM, but mainly just the design of the wastegate and its components. If you have the Profec E-01 boost controller, you can actually adjust the boost at different RPM ranges to get the desired boost curve. But I would not go over 7 PSI on stock injectors.


One step colder should be enough. You may want to gap them down a little bit. I did not confirm this, but I was told that gapping the plugs to about .030 inch will make a noticable difference. Something you may want to try doing.

Benny

 

Great info. I'll leave the dongle in and get it tuned.

I've got your PROFEC B-SPEC2. I have it zero'd and I'm only using it to monitor my peak boost. I didn't see any option to let me adjust for different RPM levels. So, it looks like I'll be switching it with the Profec E-01.


What about the new Emanage Ultimate coming out. Would it be worth it to upgrade? What new features would be applicable for our RX8's?

 

Benny -

Any word on when the Profec E-01 will have a compatible firmware with the current E-Manage?
As it stands now, it is only compatible with the 1.39 and earlier firmware of the E-Manage, which makes it incompatible with the kit.

The Ultimate will have a lot of great features making tuning the RX-8 much easier.

 

What if we purchased our kit before Jun 1, have no CELs, and have 3 dongles.
Should we still contact our Authorized Dealer for a new harness?

 

According to an old post by MZM (https://www.rx8club.com/series-i-tech-garage-22/preliminary-fuel-injector-info-45403/) the stock injectors are good to 9 PSI easy, 11 PSI theoretical max. Do you have newer information that changes the picture?
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LovelyWendie99

 

Hey Rich, haven't heard from you for a while. I am assuming things are going well because I haven't heard from you.

 

We do have the update for the Profec E-01 to be compatible with the newer version emanage on the RX-8. The SD card inside the display needs to have the newer firmware uploaded into it. To get the update, just give me a call or email and I will give you instructions on what needs to be done. Thanks.

 

It really depends on if you want to get it or not, but it really is not a hassle to install. We have made it very simple to install the update. It is just a Y connector that is color coded to plug into your plug and play harness. Also you need to change the gasket between the air pump feed hose and downpipe.

The check engine light is actually quite tricky. Cold start must be within a set temperature for the air pump to operate. Generally (very general) 65-80 degrees. I do not know the exact factors, but there are parameters for the air pump to operate. It is possible that your vehicle is not within the parameters at the moment and when the climate changes the CEL may turn on. That is the problem we had. Our testing was done around November-December last year and the CEL did not turn on a single time during the time we had the vehicle. But after it warmed up a little is when we started to get calls and the test vehicle also had a CEL light and we have been working on it since. I recommend getting the update harness from the Authorized GReddy Dealer you purchased you kit from. Thanks.

 

benny, how much horsepower do you think this turbo is ultimately capable of supporting with upgraded injectors and proper tuning?