Kasimir

Hello my name is Kasimir, I write to you from Germany, unfortunately my english Worse ... that's why I use the Google translator. I apologize for the grammar.
now to my problem.

I have my 6Port rx8 rebuilt on turbo.
Setup is top mount GT3076
Primary Injector 420ccm (two yellow)
secondary and primary 2 800cc Injector
Walbro fuel pump 255lbh
EUC map adjusted by using mazdaedit.

my problem is: the turbo starts at 2400rpm pressure to build, I have at 2500rpm 2,9psi AFR 14: 1 ... at 2700rpm 5psi AFR 15.5: 1 ... at 2900rpm 5,8psi AFR 16and more.

I have tried to adapt the MFA, but every several change in the map do nothing on the car.

the motor leans extremely starting from 2700rpm.

did you have an idea what could it be?
I have already tried with larger jets there, which also brought no change.

greetings Kasimir

Brettus

iTrader: (2)

Hi Kasimir,
the problem will probably be that the car is not exiting closed loop at those rpm . If you make adjustments to the 'closed loop unknwn' map to bring exit load down - that may do it .

See what your loads are at those rpm and bring the exit load down below that .

Kasimir

I now have the closed loop unkn map provided something down. but it has been no improvement.
after the failed attempt, I have the other load maps also screwed down a bit. However, this has also brought no success.

Brettus

iTrader: (2)

does it actually exit closed loop or not ?

You can tell if it has when sort term fuel trim goes to zero.

Kasimir

ok, yes he leaves the closed loop.

Brettus

iTrader: (2)

when you fitted the yellow injectors did you scale them as well as adjust the injector latency table ?

Brettus

iTrader: (2)

Also ............. what map/maps are you adjusting to try to richen it up ?

Kasimir

I have the secondary latency and scale copied and pasted in the primary .
the ve map and open loop

Brettus

iTrader: (2)

which open loop map ? Did you realise they are not labelled correctly ?

Kasimir

The three for the gears 1-2 3-4 5-6
Why?

Brettus

iTrader: (2)

They just aren't ........................ you need to adjust all 3 maps the same to be 100% sure for each gear.




Also : have you altered the 'load' columns for boost ...so they go up to 200% ?

Kasimir

Yes, all three have changed.

that was the problem, thanks a lot.
because I have not thought about it.

9krpmrx8

iTrader: (46)

Brettus

iTrader: (2)

Good to hear you got it sorted ..... Hopefully you have also adjusted the load columns on the timing and OMP tables

Kasimir

yes everything changed .
now runs super.

Kasimir

a question I'm still, I'm down with closed APV ... with blocking plate and in ECU entered with 10000rpm ...
the engine ran good and clean with 7psi

now I leave the open apv at 6250rpm (with blocking plate) and have from about 6500rpm a strange noise, a crackle or crack in a row quickly ...

Does somebody has any idea?

Brettus

iTrader: (2)

Firstly ... don't rev a turbo engine to 10,000rpm if you want it to live. reduce redline to 8500 tops.

Secondly ............. do you know what detonation sounds like ? If it is detonation your engine will die very soon if you keep running it like that.

Lastly ................... why are you opening the apv if you have a blocking plate fitted ?


Also : see post #13 ..... I hope you have money saved for a rebuild.

Kasimir

At the moment my rev limiter is at 8200 rpm. and a lot more I do not want to make.

now I know how it sounds, and I never want to hear it again.
Therefore I ask here after Why with APV opened it.
(with and without blocking plate)


because I wanted to test it out what happens.

how do you do that because with the aux ports?
blocking plate and in the ECU the open rpm higher than the rpm limiter?

When do the p2 injectors to work?
Must the aux ports open for it or go to work the p2 injectors as well?

Brettus

iTrader: (2)

You don't need a blocking plate with a 3076 turbo but it would be a good idea to keep it in place and limit boost to around 4-5psi while you learn how to tune . You probably got detonation because you either have too much timing or are running too lean . If you open the APVs while it's already lean - that makes it even worse due to the sudden rush of air from opening the apv causing lean spike.


The P2s come on between 4-5000 under boost and are not dependant on the apv being open.
The secondary injectors open at same time as the SSV opens.

Kasimir

ok I'm the last few days with about 6 psi.


the detonation come at around 6500-6600 rpm, ignition is 10degrees and 11degrees split.
is too early?

AFR is when the problem occurs at 11.2



ok super ... good to know

Brettus

iTrader: (2)

those numbers would normally be ok at that boost .
Some other possibilities:
carbon build up
Spark plug condition/heat range
lean spike ..... do you have a wide band AFR gage (you should do)
could just be an ignition misfire .

Kasimir

What do you mean by carbon build up?

Spark plugs are new about 800 km away.
look also super.

RE8C-L and RE9B-T

have the aux ports can be opened at 5600rpm, the problem then got even only 6500th

yes have a digital display of prosport with a wideband sensor

yes just why, the engine, the ignition system, everything has been redone is still 800 km away.

Brettus

iTrader: (2)

A misfire will generally cause the car to hesitate whereas at detonation does not generally cause a hesitation .
I'm confused as to if you have the blocking plate in place or taken out ? If it is in place , you shouldn't be opening the APVs as it will just cause a dead area in the intake .

Kasimir

At the moment I go to the plate.
and it is going really well with it.

I would like to take out the plate around the entire rev range to use.



normally nothing should happen but if the auxport go on?
if they are closed with a plate or?

Brettus

iTrader: (2)

If you have th plate in place ....... it is better not to activate the apvs .Do this by setting activation rpm at 9000.

With the plate taken out you should set APVs to come on approx. 300 rpm earlier than stock . The lean spike you see from the apv will be at different rpms depending on which gear you are in . Around 1000 rpm past the activation point for 2nd and right on the activation point for 4th . you really need to run a little richer throughout that range to minimise the spike and eliminate the risk of detonation.