Benny

I got my information from actually data logging the duty cycles of the injectors. You would have to do lots of calculations to come up with the 11 PSI theoretical max. I do not know what the theoretical PSI max really is, but to do that calculation would not be very simple. Also targe A/F ratios may vary from tuner to tuner. But I can guarantee that 11 PSI on our turbo kit with the stock injectors will not be a happy ending. It's possible a smaller turbo can deliver 11 PSI on stock injectors, but for a good sized turbo like the t618Z, it will flow too much at 11 PSI for me consider it safe to run on stock injectors. Good question. Thanks for asking.

Benny

The turbo charger itself is capable of delivering about 450 horsepower. But to get the RX-8 to be able to use the full potential of the turbo charger would mean increasing injector size and building the motor to be able to withstand the increased boost and horsepower.

MazdaManiac

iTrader: (3)

As per that thread, 9 PSI is the maximum safe range. 11 PSI would be where 100% duty cycle would happen, based on the VE of the OEM setup. The VE changes because of boost, of course and with VE going up, so would fuel demand.
You shouldn't run your injectors over 85% or so.
The "trick" is to stage the boost and have it taper off at higehr RPMs to accomodate the diminishing fuel capacity. The Greddy kit does this to some extent because of the wastegate can's bleed.

adrian-1

I used my stock gasket, a member on this board (philodox) noticed the hole was way too small.

Greddyturbo1

Hey Benny, everything is going well, The car is almost where I want it just waiting for my wheels, And the upgrade you sent me and the wiring diagram made it easy to connect. But I will say one thing, with the RP high flow cat and the E0-1 I'am running about 8.5-8.7 boost and leaning out just alittle but I believe its still safe at the 12.2AFR I'am leaning out at...I will tweak it alittle more next week to see if I can bring it down alittle more...

Hey Jeff , I believe you when you say about 9psi boost about max with stock injectors, because I'am very close to that and I'am fine...Thanks Guys...

BigOLundh

iTrader: (1)

I am also using stock gaskets.

Benny, would u recomend this as a safe alternative to the greddy gaskets? What is different about the new greddy gaskets?

BigOLundh

iTrader: (1)

Also,
I just emailed Thew at Mazdaparts to see if they have the harness. Hopefully the can send it out ASAP.

Last night my check engine light came on when starting the car, and it was still on this morning. There was no OIL under the car which is a good thing. Hopefully the new harness will take care of the light.

-HS

GrRx8MaZdA

well my air pump continues working for more than 4-5 minutes...emanage prob but what should i do??And my emanage is the latest i believe with the 3 dongles

Benny

12.2 is quite lean for this motor with forced induction. The target A/F for the kits was about 10.5-10.8 to 1 AFR. I myself would not go above 11.5 on these stock motors with high boost, just to be on the safe side. Just make sure you do not have any detonation. At this point you may want to monitor fuel pressure also to see if the stock fuel pump can deliver enough volume for more injector duty cycle.

GrRx8MaZdA

Well we have not finished the installation yet but we have some probs right now...

First the turbo kit was purchased recently so we have 3 dogles in the wires..

The problem is that we reset the car with removing the baterry's pole and then when we reattach the battery,start the car and then move it for only a few meters-not run it-let it cool and then turn it off,the air pump continued working for more than 4-5minutes...!!!!

When we remove the the emanage to reset it,the air pump stops or when we start again the car,the air pump stops..

So when we turn off the car the air pump continues working for more than 3 minutes,if i turn on the key in the preignition the air pump stops,if i turn it off again,the air pump starts again...The emanage is the problem but what should i do??Also i have bigger catalytic system...5" size cat and pipe from canzoomer(midp-4)...

Please help me cause the air pump seems to be my only problem right now..

I also have all the addons like
oil pan(installed)
oil tank(not installed yet-no space waiting for battery relocation)
profec e0-1
bov rs

also with the profec e0-1,where do you connect the pressure sensor?In the emanage or in the e0-1???

Benny

Stock gaskets are fine. If you have stock gaskets then you do not need to replace the gasket.

Benny

Where did you purchase your turbo kit from? If it was not purchased from the US, you may need to contact TRUST Japan about the issue becaust their wiring and base maps are different from the US version.

GrRx8MaZdA

i purchased it from us...
mazdaparts.com

BigOLundh

iTrader: (1)

I just emailed Thew at Mazdaparts.com the emanage serial number... hopefully he can send out the replacement E-Manage Harness out with the quickness.

My check engine light is still on. The car is still having really bad idling issues, which is causing it to stall. The car is also missing, which is probaly due to the fact that it is running super rich. As soon as i get this new e-harness in i am going to go get it tuned. Hopefully all will be well after that... hopefully.

-HS

Benny

The Emanage actually does not make adjustments at idle. The only time the emanage makes adjustments is when it sees boost pressure. Because the injectors are stock there is no need to adjust idling or vacuum conditions. If you are having idling or stalling issues, I doubt it is emanage related. You may want to look over the install to make sure all of the hoses are properly connected and blow off valve is adjust properly is you have one.

Benny

I will email you as soon as I can figure out what is going on with your car. Sorry for the wait.

RX-8fan01

Hello benny, i ahve not had any major problems with my kit at all.... i just have a question some time when i come to a stop in my car it stalls ... Sometimes it wants to stall but it does not do a complete stall..... and it does not do it often just when im going kinda fast and come to a stop in nuetral is when it seems to do it .... any suggestions thanks

Shane

BigOLundh

iTrader: (1)

Same here... This is identical to my idling issue.
Benny answered this a few posts earlier.

GrRx8MaZdA

Benny everything is ok now with the air pump no problem..Thanks for all the help

zoomzoom_8

Benny, my install is finished, car idles fine, but i have the cel that says rear rotor misfire and system too rich, running the stock emanage map. What can be wrong, i have a high flow cat but i thought that made it run leaner not richer. Please help, i miss my car!

rkostolni

I would recommend removing the high flow cat and get the car working properly without it first, then put it back on if you want.

BigOLundh

iTrader: (1)

I just talked to Thew, and my Harness is on the way. I'll report back after the install to let you know how it affected the vehicle.

ALSO, the check engline light has gone away. The car is running very smooth at night and in the early morning, but is still idling very odd during the middle of the day. (NOTE: This is Texas in the Summer, therefore... HOT AS H*LL).

-HS

adrian-1

Yeah, it's freaking hot here in Austin. 104F a couple of days ago.
I had the shop put in my 3rd dongle in for me. I didn't have a CEL so the only difference I noticed was the airpump staying on for awhile after shutdown, usually less than 10secs, but it was on for 3min after a long/ hard drive.

adrian-1

Benny,
I got my car dyno tuned this week. The most recent Greddy map was much too rich after 6k rpms. I was losing hp/tq after 6k, of course my butt dyno couldn't tell because the car was surging forward after 3k rpms where the turbo spooled up. But now it surges and pulls like crazy after 6k. I got +30hp at peak. I posted in this thread here.
The shop tuned it for 11.5 and 12.0 at high rpms and made sure no detonation was present.
Was the Greddy map made to run this rich on purpose?

Benny

That sounds great. I am glad things are going well for your car. Basically we have to keep a safe margin when tuning our turbo kits. Especially when it comes to rotory motors.