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Old 11-07-2011, 09:02 PM   #1
Carbibbles
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02 wrx

Default CarBerry ROM - 16bit Speed Density Project

CarBerry ROM - 16bit Speed Density Project



Attention Tuners: If you are tuning for money and you use this ROM on a customers car (even if they "provide it"), I would request that you send $20 per customer via Paypal with the DONATE button above or below. I have put a lot of time and work into this ROM and I believe this is a fair amount, especially considering other rom patches with less functionality are generally $35+. Obviously this is all on the honor system, but please consider that I am a broke ass college student and my time is worth just as much as yours when you are tuning. I feel that I have made enough modifications to this ROM to distinguish it from anything else available and I believe that has value.

This ROM will continue to be free for personal use but feel free to make any donations if you appreciate the ROM. Thank you.



This is a ROM developed to enhance the capability of the stock ECU on 16bit Subarus. It uses a Speed Density control scheme which means fueling is calculated primarily from the MAP sensor instead of the MAF sensor. As it is based off the Group-N ROM it will only work on 02-03 USDM WRX ECUs and 02-04 JDM ECUs. This also means that group-n tunes will transfer directly over to this ROM. You must have TGV deletes to run this ROM, this will be fixed in future versions. The goal of this project is to provide stock ECU users with some of the benefits of aftermarket ECUs but retain the ease of use and low cost of Open Source.

For existing group-n ROM users, simply open this ROM and your group-n tune with the definitions provided and transfer your tables and settings over. Make sure to open your group-n tune with the CarBerry definitions. You may notice that some of your original tune's tables have slightly different values than before(mainly the SD offset, multiplier, and load comp table). This is because the CarBerry ROM uses different conversion equations for those tables. Just transfer over the tables and your tune will remain the same, the data is just displayed differently and I will explain why later in this post. After you transfer over your old tune you can configure the CarBerry ROM features to your preference.

For those transferring over from standard MAF tunes please read up on configuring a group-n tune for your car and apply those principles to the CarBerry ROM. I will update this thread with those procedures in the near future.


Disclaimer: I assume no responsibility for any damages inflicted by running this ROM, use at your own risk.


Current Features Include(Includes Group-N Features)
-Speed Density
-Rally Style Anti-Lag
-2Step Launch Control
-Per Gear Wastegate and Boost Target control
-Anti-Lag enabled/disabled via user defined switch
-Launch Control enabled/disabled via user defined switch
-Mode byte replaced with individual switches
-Flash CEL in the event of knock w/DTC functionality
-Fuel Pump Duty Control
-Map Switching
-Launch Control Static Fuel/Timing
-Positive/Negative MAP Sensor Offsets for aftermarket MAP sensors
-No Lift to Shift (Requires slight wiring modification)
-Cut X from Y for Launch Control and NLTS
-Spark cut Launch Control


Future Features Include
-Increased Load Cap to a Max of 8.0g/rev
-Solenoid Throttle Kick functionality
-Anti-lag timeout at idle
-IAM Functionality
-Rotational Idle
-Flex fuel sensor capability
-Use of TGV sensor input as alternate sensor data logging
-TGV functionality


Verified ECU Compatibility
-Although this ROM should work with any ECU that uses the wrx02 flash method, this is a list of tested and verified compatibility.
  • USDM 02-03 WRX
  • EDM 01-02 WRX
  • ADM 01-02 WRX
  • JDM 02-04 STI



The current version is 3.0, this is the third public release. If you have any issues/comments/requests please post up and I will see what I can do. The zip file includes an EcuFlash definition file, place this in the EcuFlash rommetadata/Subaru/Impreza STi folder to allow you to flash it to your car.


Version Log
3.0
-NLTS
-Removed the MAX load table
-Included Decel Fuel Cut Table
-Included the ability to use positive or negative values in the MAP sensor offset
-Removed the user levels
-Coded in a "cut x from y" method for launch control and NLTS (to get a quicker more accurate RPM hold)
-DTCs can effect CEL status alongside KnockCEL
-Sparkcut Launch Control
-Ability to disable Defrost logic (if anybody ever had issues with using it as an input)
-Fuel pump duty hysteresis (so fuel pump duty doesn't go crazy when you are right on the edge of the switch point)
v2.6
-Re-Organized Defs
-Added Map Switching
-Added Aggressive Launch Control(Static Fuel/Timing)
-Multiple Choice Input Controls
-Added Auto Transmission Logic Disable (To accommodate using the TID pin as an input)
v1.5
- Initial Release


-I want to give a big thanks to ED(fastblueufo) for all his input and testing on this ROM. He has helped enormously in both bringing up issues that needed to be addressed with the group-n ROM and testing out the CarBerry ROM to make sure everything works correctly.

-I also want to give a big thanks to elevenpoint7five, JSarv, Merchgod and any others involved for their hard work with the original group-n ROM


ROMRAIDER v0.5.3b RC10 OR NEWER IS REQUIRED FOR EDITING OF THIS ROM - You can download this here --> ROMRAIDER Download





Download CarBerry ROM v3.0 from RomRaider Here!

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Last edited by Carbibbles; 11-07-2011 at 10:08 PM.
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Old 11-07-2011, 09:02 PM   #2
Carbibbles
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Default

Speed Density

This ROM uses a Speed Density control scheme. Basically it uses Manifold Absolute Pressure to calculate engine load instead of Mass AirFlow. The ROM uses a simple equation to convert MAP sensor input into engine load and then fine adjust that value based on a VE table. The equation is simple linear equation in the form of "Y=mX+b".

Y - Base Engine Load
=
M - Speed Density Base Load Determination (MAP Multiplier)
X - MAP Sensor Input
+
B - Speed Density Base Load Determination (Offset)

The Base Engine Load is then modified by Speed Density Base Load Compensation (MAP v. RPM) and Speed Density Load Compensation (IAT).

Normally the "Speed Density Base Load Compensation (MAP v. RPM)" would display values like 10.1 or -5.8 which would add 10.1% fuel or subtract 5.8% fuel respectively. The problem is you cant apply a multiplier to those numbers and get a correct adjustment. So if your AFR was 13:1 in a certain spot and you wanted the AFR to be 12.5:1 in that spot, you would take 13/12.5 and get a multiplier of 1.04. If the SD table contained 10.1% in that specific cell you couldn't just take 10.1*1.04 because you would get 10.504% and what it should be is 14.504%. This is because for correct math to take place you would want to take 1.101*1.04 which equals 1.14504. So with the CarBerry defs instead of the table showing 10.1% as "10.1" it shows it as "1.101" and if you had a cell that normally contained "0" for 0% it would show as "1".

These are direct multipliers, if your Base Load after the SD equation is 2.01g/rev and the value in the operating cell of Speed Density Base Load Compensation (MAP v. RPM) is 1.101 then the final Engine Load would be 2.01*1.101 which is 2.21301g/rev.


For existing group-n ROM users you wont need to convert values from your old tune. Just open your old tune with the CarBerry defs and it will display your old tune with the new format. Then copy everything directly over to the CarBerry ROM. Basically the actual data will be the same in the tune, but RomRaider will just display it differently.

You may also notice that the load "offset" and "multiplier" tables show slightly different numbers than your old tune, the CarBerry defs use a slightly different conversion equation that is a little more accurate. Again as long as you open your old tune with the CarBerry defs everything will transfer directly over and your tune will stay the same, the values are just displayed differently in RomRaider but the actual data on the ECU will remain the same.


Knock-CEL

Knock-CEL Enable
This enables the Knock-CEL function, DTCs will not effect the status of the CEL when this function is enabled.

Knock-CEL Sensitivity
This value controls the amount of FBKC required to illuminate the CEL. FBKC must fall numerically lower than this value to trigger the CEL. If the sensitivity is at "0" and you get any negative FBKC (ex. logged -2.11 FBKC) then the CEL will light. If you have the sensitivity set at "-5" and you log "-2.11" FBKC the CEL will not light, but if you log "-5.1" with the sensitivity set at "-5" then the CEL will light. So the FBKC has to drop further negative than the "sensitivity" setting in order to light the CEL.


Anti-Lag

Attention Anti-Lag users:
-First of all, I would like to mention, as many others have, that the ALS can be hazardous to your engine/turbo. Please keep this in mind if you decide to use this feature of the ROM. The use of the ALS requires more advanced tuning and should only be used/tuned by more experienced tuners that fully understand the risks involved. For all users of the ALS please make sure your vehicle is set up accordingly, this includes the removal of all catalytic converters(rendering the vehicle as off-road use only) and re-locating the front O2 sensor to the downpipe as it can break apart and destroy your turbo.


Throttle Kick
I finally got a chance to dig through the TPS code and figure some stuff out. The anti-lag that we have been using thus far has been very mild, and I believe the ROM is actually meant to be used in conjunction with a "throttle kick". Please note that I am using the term "throttle kick" in reference to locking the throttle slightly open so that more air can enter the engine when no throttle input is being applied (I am not referring to the act of actually kicking"with your foot" the throttle pedal). A throttle kick can be implemented in various ways, most often with a longer set screw. The amount of "kick" can generally vary from 5% to 15% depending on how aggressive you would like to go.

If you look at the idle timing tables and idle speed target tables you will notice they have two rows, one being .58v and one being .74v. These are slightly mislabeled as "Throttle Position Sensor (Volts)" (I have corrected the labels in the upcoming version). The parameter that these tables are actually referencing is basically the amount of "throttle kick" that has been applied, the .58v row is stock throttle position(completely closed) and the .74v row is about a 6% throttle kick(this row will be used at higher kick percentages as well). This referenced value remains constant no matter what your current TPS voltage is. So now these tables start to make a little more sense, you can see that the ECU removes timing and adjusts the idle speed target based on the amount of throttle kick that has been set in order to keep the engine from revving up due to the cracked open throttle. I have done some testing and I can tell you that with the throttle kicked open a bit the engine definitely has a more "lumpy" idle that is usually associated with rally cars. Having the throttle kicked should produce a much more aggressive ALS, I haven't done any testing yet but I will soon.

So the question is, "How do I set up a throttle kick?". Well first of all you need to decide what method you will use to keep the throttle plate cracked open. Usually you can use a longer set screw but other methods can be used as well. I will leave this up to you. Turn your key on and log TPS volts, you should "kick" the throttle open to a value between .74v(~6%) and .9v(~12%). Then you need to "calibrate" the kicked throttle. To do this is very easy, the ECU "zeros" out the throttle after reset. So to calibrate the throttle all you need to do is set up your throttle kick, then reset the ECU using learning view or the romraider logger (I used learning view). And that's it, your ECU will see your "kicked" throttle position as 0% throttle. And now (depending on if you set your kick to .74v or higher) the bottom row(.74v) of your idle timing and idle speed target tables will be used. If you decide to set your throttle back to normal you do not need to reset the ECU, just remove the kick and the ECU will "re-zero" the throttle.


In the next coming version I will also add support for a solenoid actuated kick that will automatically zero the TPS without an ECU reset. This will allow users to switch between a kicked throttle and standard throttle with the flip of a switch (with the addition of a throttle kick solenoid to the throttle body)


Map Switching

Map Switching - Enable
This enables the Map Switching feature.

Map Switching - Input Control
This selects the switch that will be used to determine the active map. When the selected switch is activated, all tables with the prefix "Map2 -" will be used.


Launch Control

Launch Control - Enable
This table Enables or Disabled Launch Control.

Launch Control - Input Control
Select an input to control the active status of launch control.

Launch Control Mode Disable (Veh. Speed)
This is the Launch Control Vehicle Speed Threshold.

Launch Control Fuel Cut (RPM)
This is basically your Launch Control Target RPM, generally you can set its values 1 RPM apart for tight RPM control.

Launch Control Mode Enable (RPM)
This is used for the Static Fuel/Timing if it is Enabled. Fuel/Timing will lock at the specified static values over this RPM.

Launch Control - Static Fuel/Timing Enable
This enables the Aggressive Launch Control feature. By forcing the Fuel Target and Ignition timing to be static you are able to lock them at very low values which will increase boost and power upon using Launch Control.

Launch Control - Static Fuel Target
This is the Fuel Target that will be used when Launch Control is Active and RPM is over "Launch Control Mode Enable (RPM)". Set this low to something like "9" or "10".

Launch Control - Static Ignition Timing
This is the Ignition Timing that will be used when Launch Control is Active and RPM is over "Launch Control Mode Enable (RPM)". Set this low to something like "-10" or "-12" (Note the negative).


No-Lift-To-Shift (NLTS)
The NLTS system calculates the RPM of the next gear based on vehicle speed and attempts to rev-match to that RPM while also cutting fuel to unload the drivetrain and allow extremely quick shifting. You must wire your clutch switch to an ECU input and also make sure your "gear determination thresholds" are set up correctly for your transmission.

Clutch Switch Wiring
The cruise control clutch switch must be used for NLTS, this switch has a 2 wire connector with a yellow/red wire and a yellow/green wire. You can wire the switch in two methods.

A. If you don't care to retain your cruise control functionality (cruise control will be disabled with this method) you can simply snip the wires and run one from the connector to a ground and the other to the ECU input pin/wire. If you choose to wire it this way you must set the clutch switch input to "inverted" in the NLTS settings. See the diagram below.


B. If you wish to retain your cruise control you can wire it up with a 12v source and 2 diodes. This will retain cruise control functionality. Follow the diagram below for this method.


Clutch Switch Adjustment
For better results, you way want to adjust the clutch switch closer to the clutch pedal. Without this adjustment you may experience some jerkiness when releasing the clutch in a slower manner.

NLTS - Enable
This table Enables or Disabled NLTS.

NLTS - Activation Input
Select an input to control the active status of NLTS.

NLTS - TPS Threshold
This is the TPS threshold, above which, NLTS will be active.

NLTS - Clutch Switch Input
This determines the ECU input that you wire your clutch switch to.

NLTS - Vehicle Speed Ratio Units
These are the units that are used to calculate the rev-matched RPM between shifts. Use the "Vehicle Speed Ratio Calculation" logger parameter in the SDlogger.xml and obtain average values for each gear. The ROM is setup by default for a standard USDM wrx 5speed.

NLTS - Minimum Calculated RPM
This is the lowest RPM that will be calculated to rev-match to when shifting gears.

NLTS - RPM Offset
This is a static offset to the calculated rev-match RPM.


Fuel Pump Duty

Fuel Pump Duty - Switch Point (MAP)
This is the point based on Manifold Absolute Pressure that the Fuel Pump duty will switch from low to high.

Fuel Pump Duty - Low Duty Cycle
This will be the Fuel Pump duty when MAP is below the "Fuel Pump Duty - Switch Point (MAP)".

Fuel Pump Duty - High Duty Cycle
This will be the Fuel Pump duty when MAP is above the "Fuel Pump Duty - Switch Point (MAP)".

Last edited by Carbibbles; 11-07-2011 at 09:11 PM.
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Old 11-07-2011, 09:02 PM   #3
Carbibbles
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Default

Setting up a Base Map

-To be completed



Tuning Guide

-To be completed



Wiring/Mechanical modifications

-To be completed



FAQs

-To be completed

Last edited by Carbibbles; 11-07-2011 at 09:14 PM.
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Old 11-07-2011, 11:28 PM   #4
wrxsubiemod
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Awesome man. Keep up the good work
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Old 11-08-2011, 12:41 AM   #5
illmatic
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Subscribed..
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Old 11-12-2011, 04:04 PM   #6
scoops04wrx
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+2 to this. Thx for this
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Old 11-19-2011, 05:24 PM   #7
Carbibbles
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v3.3 released
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Old 12-27-2011, 05:57 PM   #8
RallyKid
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Anyone tried this on a 04 USDM WRX?
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Old 12-29-2011, 06:52 AM   #9
ride5000
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holy **** bibbles.

i've got to get a tuning laptop fired up again...
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Old 12-29-2011, 10:05 AM   #10
fastblueufo
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Quote:
Originally Posted by RallyKid View Post
Anyone tried this on a 04 USDM WRX?
Just finished tuning this on an 04 wrx yesterday. You need an 02/03 wrx ecu and its basically plug and play after that.
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Old 12-31-2011, 12:09 AM   #11
bswilmington
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Any plans for the 32 bit ecu's?
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Old 01-24-2012, 12:59 PM   #12
PrecisionCustom
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Nice work Jason
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Old 01-24-2012, 01:23 PM   #13
RallyKid
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Quote:
Originally Posted by fastblueufo

Just finished tuning this on an 04 wrx yesterday. You need an 02/03 wrx ecu and its basically plug and play after that.
Does a 02-03 ecu just plug and play into a 04 rex?
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Old 01-24-2012, 01:47 PM   #14
ride5000
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anybody attempt to pass an OBD2 emissions inspection test?
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Old 01-24-2012, 01:47 PM   #15
ride5000
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or, conversely, has anyone had any codes that would prevent passing said test pop up? and/or does the cat efficiency test show as "ready?"
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Old 01-26-2012, 11:13 AM   #16
slinkyWRX
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it passes the readiness monitors on my scan tool at work!
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Old 01-26-2012, 12:08 PM   #17
Carbibbles
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Quote:
Originally Posted by RallyKid View Post
Does a 02-03 ecu just plug and play into a 04 rex?
Yes, eventually I would like to figure out how to get this ROM to flash onto 04-05 ECUs but for now an 02-03 ECU is an easy swap in.



Quote:
Originally Posted by ride5000 View Post
anybody attempt to pass an OBD2 emissions inspection test?

It should pass just as well as a MAF rom would, I've added the force pass readiness and all DTCs are able to be disabled. I haven't heard of anybody attempting an emissions test though.
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Old 01-26-2012, 12:14 PM   #18
ride5000
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hmm, that's very good to know.

i have a busted maf sensor, so a long time ago i snipped the maf sensor wire. this throws the "standard" rom into failsafe speed density mode, which i found was remarkably stable and accurate. i've been running on it ever since.

problem is, no maf sensor throws a code. disabling the code ends up reverting the failsafe back to maf mode, which doesn't work! i have a utec so i don't see the light, but it'll stop me from passing obd2.

the car will idle with the maf wire connected--it just falls apart at the higher loads--so that WAS my plan to get it inspected... but if THIS is an option..
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Old 01-28-2012, 11:14 AM   #19
wrxsubiemod
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I predict that in a couple of years maf sensors will be a thing of the past
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Old 01-29-2012, 12:33 AM   #20
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subscrib'd.
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Old 02-02-2012, 12:18 AM   #21
Equilibrium Tuning
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Very nice! I have a customer car that could greatly benefit from this but we'll have to round up an 03 ECU. I wish this worked on an 04.

-- Ed
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Old 02-02-2012, 01:03 AM   #22
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Quote:
Originally Posted by bswilmington View Post
Any plans for the 32 bit ecu's?
Yes. I don't like to make predictions so I won't say when it will be ready, but I will say that work is in progress.

My Legacy GT is running my own speed-density code, but I've only just begun tuning it. I'm going to be working on flex-fuel tricks next - there's another guy working on he hardware for that, plus there's a couple other guys working on stuff like flashing the CEL and changing settings without reflashing.

The 16-bit folks have an advantage in that one ROM can work on a lot of different cars, though. Compatibility between 32-bit ECUs is still mostly unknown. I've been spending a bunch of time finding ways to make the changes easier to apply to different cars, but I don't think there's any way around the fact that it's going to take a lot of hours to support each new car.
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Old 02-04-2012, 04:53 PM   #23
ride5000
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today i verified this rom passed a RI OBD2 emissions control inspection...

with a disconnected maf sensor.

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Old 02-04-2012, 06:13 PM   #24
maxpowr
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Looking forward to using it myself.
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Old 02-05-2012, 01:34 PM   #25
bswilmington
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Quote:
Originally Posted by NSFW

Yes. I don't like to make predictions so I won't say when it will be ready, but I will say that work is in progress.

My Legacy GT is running my own speed-density code, but I've only just begun tuning it. I'm going to be working on flex-fuel tricks next - there's another guy working on he hardware for that, plus there's a couple other guys working on stuff like flashing the CEL and changing settings without reflashing.

The 16-bit folks have an advantage in that one ROM can work on a lot of different cars, though. Compatibility between 32-bit ECUs is still mostly unknown. I've been spending a bunch of time finding ways to make the changes easier to apply to different cars, but I don't think there's any way around the fact that it's going to take a lot of hours to support each new car.
Thank you. I look forward to it. No rush , just maybe something to play around with
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