Arny

Hi everybody,
I have an MS2 made by Reverant.
Here are all the informations about my setup:

stock internals 1.8l VVT engine (but VVT is not supported for the moment)
MS2
Rx8 450cc injectors
Rotrex C30-74 supercharger with Air/water intercooler
Innovate LC1 wideband
Racing Beat header and exhaust
Flyin' Miata midpipe with high flow cat
10 PSI max at 7000rpm

The idle is very nice and I have no problem when I drive it but as you can see on this video, I have some balks that comes from my A/F table and/or ignition table (those problems don't come from a slipping belt of my supercharger as I have written in the vid ).
https://vimeo.com/58926964

The map I'm using is a basemap and I haven't touch it so I think it needs some changes.

Here is the datalog I have made (car stopped):


You can download the log here: Free - Envoyez vos documents

I don't know if it could change the numbers but I will do another log on the road this weekend. (WOT)

Here is what I have (basemap) : (MSQ here: Free - Envoyez vos documents )



A friend of mine has given me some advice so I have changed a few thing to try to "surround" the pressure recorded in the log: (MSQ here: Free - Envoyez vos documents )



The only changes I have made are the spark advance table and the VE table.
I don't want a super aggressive setup for my stock engine. Just something that work great on the road and on the track.

What do you think of those changes?
Do you have some advice about this?
I begin in the MS tuning world.
Any advice accepted! Thanks for your help


Edit: Here is my AFR table :

sixshooter

iTrader: (12)

Arnauld, download TunerStudio and pay to upgrade to the best version. Then use VE Analyze Live (VEAL) to have the fuel table (VE) automatically tuned to match your target AFR table. All you need to do once VEAL is turned on is to drive your car around for a couple of hours and the program will tune your car correctly for fuel. It works very well and is very simple to use.

It will not tune spark.

Arny

Thank you Steve for your advice.
I already have used VE Analyze Live mainly in low and medium rpm.
How can I know if my targets are right?

sixshooter

iTrader: (12)

I decided on mine through study. My scale for KPA and RPM is different than yours, but you could use similar targets to mine if you want to.

Reverant

iTrader: (10)

12.2 at 140kPa?

Arny

We have made some changes. Here are the new tables:

AFR target table:


Fuel table:


Advance table:


The advance table is really safe (too safe?). What do you think of those tables?

sixshooter

iTrader: (12)

I'm a bit overly conservative because I track the car in very hot conditions and everything gets heat soaked. I'll gladly give up some economy for the extra detonation prevention and fuel cooling.

Reverant

iTrader: (10)

That's LEAN. I would target at least 11.8 at 140kPa.

SJP0tato

iTrader: (7)

Figured I'd toss in my $0.02 and show what I'm running too:


My max boost is around 175kPa or so.

sixshooter

iTrader: (12)

140kpa is only 5.6 psi. And it goes to 11.0 afr by 10 psi (170kpa). And that interpolates to 11.6 afr at 7.8 psi. Do you think that's a problem?

Arny

Here is a wot log I have made:



And I have tried Virtual Dyno:



I think the afr is too lean in high rpm.

Here is my VE table :



And my AFR targets :



Any advice accepted to increase the values in high rpm.

Arny

I have bought a Walbro 255lph fuel pump to help my injectors.

And I think I have found why I have the problems that you can see in the video.
I have a lost sync problem that you can see on this log:

Free - Envoyez vos documents

The log sync reason is a 32 value. I have taken a look here:
https://www.miataturbo.net/megasquir...reasons-43775/

32 = Miata 99-00 - 0 cams seen

My car is 04' and it worked without problem before the MS and it has only 61000km (37900 miles). I have checked the cam sensor and the wiring seems good.

Do you know how can I fix this problem?
Thanks

Reverant

iTrader: (10)

Does the sync loss always happen at about the same RPM? Can you grab it on a composite log?

Arny

The lost sync always happens on acceleration over 4000rpm but it doesn't happen at every acceleration. On light acceleration and under 4000rpm, there is no problem.

What is a composite log?
You can find the datalog in the link above.

Edit: I don't think you can see the composite log without starting the sync error logger. I'm going to change the fuel pump because I don't want to make more WOT log without adding more fuel in high rpm. I will try to do a new log with this sync error logger, but the next step is to tune my fuel map (advice welcome) with the Walbro fuel pump before doing a new WOT log.

Reverant

iTrader: (10)

Go to the diagnostics tab, and choose to save a composite log from there. Make it short.

Arny

I have edited my previous message.
I will do it after the mounting of the fuel pump and the tuning of my fuel map with the new fuel pump. What is the best solution to tune it right?

sixshooter

iTrader: (12)

Use Tunerstudio VE Analyze Live to autotune the fuel.

Arny

Yep, but I was refering to the fuel map.
The fuel target stays the same but I think I have to change the values in the VE table. I will use VEAnalyze to make it right but I think if I stay with the same VE table with the larger fuel pump, it will be way too rich at the beginning and I don't think it's a good idea for my catalyser.

sixshooter

iTrader: (12)

Unless the other pump was not working properly it should be just fine to just tune with VEAL. Set it to easy and it should adjust quickly.

Arny

Thank you for the advice