Instructions to change fuel maps on 14CUX Griffith, Chimaera

Instructions to change fuel maps on 14CUX Griffith, Chimaera

Author
Discussion

Chuffmeister

3,597 posts

138 months

Tuesday 19th November 2013
quotequote all
Ribol said:
For those of us that wouldn't know an Ostrich from an Eprom could some kind soul who speaks both Geek and English please give those of us who are interested and trying to follow this a quick sum up of where we are with this today?

In other words, assuming it can now be done(?) what would be the simplest way of someone who isn't clueless about cars altering their own 14CUX fuel map?

Ta very much angel
I wanted to ask that, but thought I was the only one that hadn't a Scooby Doo of what they were talking about…paperbag

So when, how, and how much...

karlspena

24 posts

127 months

Tuesday 19th November 2013
quotequote all
Ribol and Chuffmeister:

This is my version of the original instructuctions modified to fit my newbie experience on the task and to include the advice of senior members that have helped me on the way.

To tune the 14CUX you need the following.

1 - TOP853 USB universal programmer, or any other EPROM programmer capable of burning 27C256 or 28C256 (if using EEPROM). I have used a G540 chinese programmer but the software is even worse than TOP853's. Both of these don't work on 64bit windows, so if you don't want to dual boot you can opt for a better programmer. A really nice low-cost programmer is the German-made Batronix BX-32 (works on 64bit OSes).
2 - A few EPROM (27C256) chips to experiment with. These come on UV erasable or One-Time-Programable (OTP) versions. Also, you can use 28C256 (I use ATmel) which are electronically erasable if you don't want to erase using UV. Just make sure you DON'T buy 12V versions of these chips.
3 - Ultra Violet (UV) light EPROM eraser (if you use UV 27C256, if using 28C256 you don't need it)
4 - RoverGauge cable and software, blitzracing (Mark) can make one for you or you can follow the instructions on Rovergauge's page https://code.google.com/p/rovergauge/
5 - Lock/Eject IC Socket with 28 pins, makes removing PROM’s safer & quicker, not mandatory, but neat.
6 - AFR meter. If it has logging capabilities, even better. With this you check the AFR while on a certain position on the map and adjust it to get perfect AFR for that particular RPM range.
7 - TunerPro (or TunerPro RT + Ostrich 2.0 to edit in real time). Also, get Robert and Steven files for Tunerpro to see and edit your maps and set the checksum automatically.

Optional

Rolling Dyno. So you can use the feedback from the AFR + the power output of the engine to get the best map possible.

Process:

Before anything I would make sure the AFM and the O2 sensors (on Cat vehicles) are working as they should. Set the CO trim (on Catless vehicles) to the value recommended. Then you can take on the AFR. Mark's advice was this:

Target AFR for catalyst engine - 14.35:1 in closed loop- up to 3400 rpm. Above that as per non cat map.

Non cat map. Idle 13.5:1 or a bit richer to get a smooth idle. Acceleration phase- 12.5:1 Full power steady state 13:1. Light cruise 15.4:1

If you see you are running rich (or lean) you can just change the adjustment factor (like I did) to move your whole map up or down. Once you set a ballpark you can edit individual cells and play with the rest of the scalars.

spitfire4v8

3,993 posts

182 months

Tuesday 19th November 2013
quotequote all
^ yup. I don't know where the 14.35:1 afr for cat mixture comes from, it's 14.7 I think the david hardcastle book is misleading people here as I've seen that number in that book.

Anyway .. the rest looks good .. what you really need to do if you want to map your own ecu is to wait for Steve's logging software to come about for download .. that way you can just look at the logs and re-write your map file and burn to a new prom. If you want to though you can use an ostrich (made by moates in the usa) and leave that plugged in to emulate the original chip file, then update that file on the fly with tunerpro as you gather information either from data logging or by watching a lambda sensor output in real time. By far the safest way is logging and looking at the data when you get home.

blitzracing

6,392 posts

221 months

Tuesday 19th November 2013
quotequote all
The Des Hammill how to tune the Rover V8 book has a lot about the ECUs in it, Id say looking at the constant references to Tornado systems was from Mark Adams, and here it state the RV8 probes are set at 14.35:1 when they hit a mid point of .54 volts. This is a completely impossible value to verify, as it constantly cycles over quite a wide range. A plot I took recently shows the AFR clamping at an average of 2.51 volts on the wideband,(wiggly yellow line) but that works out nearer 15:1. 14.35:1 gives about 2.18 volts. so take your pick smile




spitfire4v8

3,993 posts

182 months

Tuesday 19th November 2013
quotequote all
Whenever I run a catted griff or chim on my dyno they always make bang on 14.7 afr under lambda control .. confusing that it says 14.35 in the book (hamill not hardcastle, getting my books mixed up!)

stevesprint

Original Poster:

1,114 posts

180 months

Tuesday 19th November 2013
quotequote all
spitfire4v8 said:
excellent news and many thanks for doing this. I know you're doing this for free and for the good of the RV8 world .. but let us know if you ever set up a donations page or similar .. I think it's amazing what you are doing and would very happily make a donation to say thankyou. In the meantime ... Thankyou!
Jools, I couldn't agree more and I would certainly donate Colin and Dan some beer money if I could. I have leant a lifetimes worth of knowledge from them in just two months, not only 14cux knowledge. Plus they have been very patience with me when I have my blonde moments, I really appreciate it. Colin & Dan, if you ever need any parts posted from the UK please do not hesitate to ask.

Ribol

11,294 posts

259 months

Wednesday 20th November 2013
quotequote all
karlspena said:
This is my version of the original instructuctions...................
bow

thumbup

danbourassa

246 posts

138 months

Thursday 21st November 2013
quotequote all
stevesprint said:
Colin & Dan, if you ever need any parts posted from the UK please do not hesitate to ask.
One Cerbera please, lightweight, Red Rose, 4.5, old style headlights, color unimportant.

danbourassa

246 posts

138 months

Thursday 21st November 2013
quotequote all
Here is something interesting that I just noticed. The top map is map 0 for 94 Griffith 500 (R2967, checksum $55). The bottom map is map 0 for 95 Griffith 500 (R2967, checksum $5B). We know that the later map was leaned out in the mid-range rows, but that's not why I'm posting this. If you look at the values in the 3rd last row, you will notice a couple of values that are wildly out of place. I can't believe these are not mistakes. Stranger still is that they leaned out these values along with the others.


limpHomeMap DB $21,$21,$21,$21,$1F,$1D,$1A,$19,$19,$19,$19,$19,$18,$14,$14,$14
DB $3F,$3E,$3D,$3B,$3A,$39,$39,$39,$3B,$3C,$3B,$39,$35,$30,$30,$30
DB $60,$5F,$5E,$5F,$60,$63,$61,$61,$61,$62,$60,$5F,$55,$4C,$4C,$4C
DB $92,$92,$90,$90,$8C,$90,$90,$88,$88,$84,$85,$85,$79,$6C,$6C,$6C
DB $B7,$B4,$B5,$B5,$B6,$B1,$AB,$AB,$AB,$AB,$A9,$A8,$97,$8E,$8E,$8E
DB $FF,$1C,$D7,$1C,$D7,$DA,$DD,$DE,$E8,$DD,$D8,$D8,$D3,$D3,$BF,$C9
DB $FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FA,$DC,$E6,$E6,$E6,$E4,$F0
DB $FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FB,$FA,$FA,$FA,$FD,$FD

limpHomeMap DB $21,$21,$21,$21,$1F,$1D,$1A,$19,$19,$19,$19,$19,$18,$14,$14,$14
DB $3F,$3E,$3D,$3B,$3A,$39,$39,$39,$3B,$3C,$3B,$39,$35,$30,$30,$30
DB $5D,$5C,$5B,$5C,$5D,$60,$5E,$5E,$5E,$5F,$5D,$5C,$53,$4A,$4A,$4A
DB $8E,$8E,$8C,$8C,$88,$8C,$8C,$84,$84,$80,$81,$81,$75,$69,$69,$69
DB $B2,$AF,$B0,$B0,$B1,$AC,$A6,$A6,$A6,$A6,$A4,$A3,$93,$8A,$8A,$8A
DB $FF,$1B,$D1,$1B,$D1,$D4,$D7,$D8,$E1,$D7,$D2,$D2,$CD,$CD,$B9,$C3
DB $FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FA,$DC,$E6,$E6,$E6,$E4,$F0
DB $FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FB,$FA,$FA,$FA,$FD,$FD

stevesprint

Original Poster:

1,114 posts

180 months

Thursday 21st November 2013
quotequote all
UPDATE AND OVERVIEW FOR NON GEEKS

Ribol said:
For those of us that wouldn't know an Ostrich from an Eprom could some kind soul who speaks both Geek and English please give those of us who are interested and trying to follow this a quick sum up of where we are with this today?

In other words, assuming it can now be done(?) what would be the simplest way of someone who isn't clueless about cars altering their own 14CUX fuel map?
Chuffmeister said:
I wanted to ask that, but thought I was the only one that hadn't a Scooby Doo of what they were talking about…paperbag
So when, how, and how much...
Here’s an update for non geeks in plain old English that even Scooby Doo might understand. As I’m only a part time geek I know how you feel especially when I’m trying to keep up with the masters in America.

WHEN
Our American friends have cracked the 14CUX and published everything we need to know to completely remap the 14CUX. Jools has now successfully fully remapped a Griffith 500 on his rolling road using all of the available gadgets to streamline the whole process. Without doubt this proves the 14CUX can NOW be fully remapped by anyone on a rolling road with the correct gadgets.

MINIMUM GADGETS REQUIRED
I’ve personally had a quick session on the local rolling road armed only with my laptop, a few chips for £8 each and a chip programmer for £30 and successfully proved that’s all you need to remap the 14CUX. Unfortunately, I could of spent the whole day their copying and swapping chips while remapping every rpm point under different loads but that would of cost hours of rolling road time. Jools uses a Moates Ostrich as it allows him to change the amount of fuel while on full throttle and you instantly see the change take effect on the gas analysers and on the rolling road bhp readout. How cool is that!!

HOME TUNER
The home tuner doesn’t need to buy a Moates Ostrich that allows remapping in mid flight as that would be dangerous while driving but ideal on the rolling road, however it would save pulling out the chip for each test.
I’ve proved you can capture data on a laptop while driving and then use the captured data at home to remap the chip from the comfort of your armchair. I haven’t actually tested the whole process as I don’t have a gas analyser and therefore I’m waiting for a volunteer to email me a gas analyser computer file so I can complete the testing.

I’m sure everyone realises you cannot tune an engine without a gas analyser, Therefore to home tune you’ll have buy one of the following gas analyser and preferable weld the sensor into the exhaust system as near to the engine as possible. I don’t recommend clamping the sensor to the tail pipe while driving.

http://www.ebay.co.uk/itm/AEM-GAUGE-6-in-1-TYPE-WI...

http://www.ebay.co.uk/itm/PLX-DM-6-AFR-Multi-Gauge...

I suggest these two gas analysers, as I’ve checked we can use the computer data they generate.

HOW MUCH
With either approach you’ll need a laptop running Windows XP or Windows 7 with 2 spare usb port, plus at a minimum you'll also require the following three items:

1.Chip programmer for £30, my TOP853 has been faultless and is excellent value for money.
http://www.ebay.co.uk/itm/USB-universal-programmer...

2. A few reusable chips for £8.00 each like these (28C256)
http://www.ebay.co.uk/itm/AT28C256-15PU-Atmel-EEPR...

3. RoverGauge cable for £35 from
http://www.pistonheads.com/classifieds/parts-and-p...

HOW
With either approach you need to install and run the following free software:

RoverGauge
To check your fuel map updates are as expected.

TunerPro (no Ostrich support) or TunerProRT (with Ostrich support)
This is a user friendly graphical interface you use to make changes to the fuel information. Your changes are either saved to hard disk and then copy onto a chip using a chip programmer, or with a Moates Ostrich instantly updated on the ECU in mid flight.

TunerPro definition
Configuration information that TunerPro(RT) uses to know where the fuel tables are on the chip.

Chip programmer software
Used to copy your updated fuel maps, created in TunerPro, onto a chip.

TimeLogger
This is for the home tuner to captures exhaust gas information onto a computer while driving. Although it is a work in progress it will eventually merge the exhaust gas information with RoveGauge information to produce an exhaust gas results table that can be cross referenced with the main fuel table. You can then make the necessary fuel corrections in TunerPro. As mentioned above I currently don’t have a gas analyser so I would be grateful if anyone can please email me a gas analyser computer log file so I can finish the merge function and testing.

The above programs can be downloaded via www.stevesprint.com/remap-14cux

Should you have any issue with the software links or have further questions please do not hesitate to contact me but please go easy on me as I’m doing this for fun plus I’m only half geek.
Cheers, SteveSprint

Edited by stevesprint on Thursday 21st November 11:06

robertf03

59 posts

202 months

Thursday 21st November 2013
quotequote all
Excellent work Steve! I'm glad you all have been making progress. Been busy with work and haven't had time to mess with it. I did get to take the Disco out this weekend and its still over fueling. I'm at the point where I think my MAF has had it at 260k.

robertf03

59 posts

202 months

Thursday 21st November 2013
quotequote all
For those on an incredibly tight budget I've heard of this alternative for chip burning. Take an older PC and use the bios flash utility with a blank eeprom in the socket and flash it with the rover .bin file as the image. This was an old technique that people used with the GM stuff back in the late 90's, might still work for those who have a computer junkyard.

My willem burner still barely works, might be time to upgrade to a USB programmer

Ribol

11,294 posts

259 months

Thursday 21st November 2013
quotequote all
stevesprint said:
Here’s an update for non geeks in plain old English that even Scooby Doo might understand...............
Many thanks for taking the time to post that up, I am sure that it will be of great interest to other mere mortals trying to keep up beer


Scooby Doo

(BTW, if it helps anyone the rovergauge/Mark's cable combo also works fine on Vista as well as XP/7)

Chuffmeister

3,597 posts

138 months

Thursday 21st November 2013
quotequote all
stevesprint said:
Here’s an update for non geeks in plain old English that even Scooby Doo might understand. As I’m only a part time geek I know how you feel especially when I’m trying to keep up with the masters in America.

WHEN
Our American friends have cracked the 14CUX and published everything we need to know to completely remap the 14CUX. Jools has now successfully fully remapped a Griffith 500 on his rolling road using all of the available gadgets to streamline the whole process. Without doubt this proves the 14CUX can NOW be fully remapped by anyone on a rolling road with the correct gadgets.

MINIMUM GADGETS REQUIRED
I’ve personally had a quick session on the local rolling road armed only with my laptop, a few chips for £8 each and a chip programmer for £30 and successfully proved that’s all you need to remap the 14CUX. Unfortunately, I could of spent the whole day their copying and swapping chips while remapping every rpm point under different loads but that would of cost hours of rolling road time. Jools uses a Moates Ostrich as it allows him to change the amount of fuel while on full throttle and you instantly see the change take effect on the gas analysers and on the rolling road bhp readout. How cool is that!!

HOME TUNER
The home tuner doesn’t need to buy a Moates Ostrich that allows remapping in mid flight as that would be dangerous while driving but ideal on the rolling road, however it would save pulling out the chip for each test.
I’ve proved you can capture data on a laptop while driving and then use the captured data at home to remap the chip from the comfort of your armchair. I haven’t actually tested the whole process as I don’t have a gas analyser and therefore I’m waiting for a volunteer to email me a gas analyser computer file so I can complete the testing.

I’m sure everyone realises you cannot tune an engine without a gas analyser, Therefore to home tune you’ll have buy one of the following gas analyser and preferable weld the sensor into the exhaust system as near to the engine as possible. I don’t recommend clamping the sensor to the tail pipe while driving.

http://www.ebay.co.uk/itm/AEM-GAUGE-6-in-1-TYPE-WI...

http://www.ebay.co.uk/itm/PLX-DM-6-AFR-Multi-Gauge...

I suggest these two gas analysers, as I’ve checked we can use the computer data they generate.

HOW MUCH
With either approach you’ll need a laptop running Windows XP or Windows 7 with 2 spare usb port, plus at a minimum you'll also require the following three items:

1.Chip programmer for £30, my TOP853 has been faultless and is excellent value for money.
http://www.ebay.co.uk/itm/USB-universal-programmer...

2. A few reusable chips for £8.00 each like these (28C256)
http://www.ebay.co.uk/itm/AT28C256-15PU-Atmel-EEPR...

3. RoverGauge cable for £35 from
http://www.pistonheads.com/classifieds/parts-and-p...

HOW
With either approach you need to install and run the following free software:

RoverGauge
To check your fuel map updates are as expected.

TunerPro (no Ostrich support) or TunerProRT (with Ostrich support)
This is a user friendly graphical interface you use to make changes to the fuel information. Your changes are either saved to hard disk and then copy onto a chip using a chip programmer, or with a Moates Ostrich instantly updated on the ECU in mid flight.

TunerPro definition
Configuration information that TunerPro(RT) uses to know where the fuel tables are on the chip.

Chip programmer software
Used to copy your updated fuel maps, created in TunerPro, onto a chip.

TimeLogger
This is for the home tuner to captures exhaust gas information onto a computer while driving. Although it is a work in progress it will eventually merge the exhaust gas information with RoveGauge information to produce an exhaust gas results table that can be cross referenced with the main fuel table. You can then make the necessary fuel corrections in TunerPro. As mentioned above I currently don’t have a gas analyser so I would be grateful if anyone can please email me a gas analyser computer log file so I can finish the merge function and testing.

The above programs can be downloaded via www.stevesprint.com/remap-14cux

Should you have any issue with the software links or have further questions please do not hesitate to contact me but please go easy on me as I’m doing this for fun plus I’m only half geek.
Cheers, SteveSprint

Edited by stevesprint on Thursday 21st November 01:12
Thanks for that Steve. Can you ditch the 5AM with this approach? I know Blitz has been busy working on stuff with the AFM's and he's not too far from me.

Edited by Chuffmeister on Thursday 21st November 15:33

spitfire4v8

3,993 posts

182 months

Thursday 21st November 2013
quotequote all
Yes you can. I have a car up and running on a 20 am

shpub

8,507 posts

273 months

Thursday 21st November 2013
quotequote all
stevesprint said:
TimeLogger
This is for the home tuner to captures exhaust gas information onto a computer while driving. Although it is a work in progress it will eventually merge the exhaust gas information with RoveGauge information to produce an exhaust gas results table that can be cross referenced with the main fuel table. You can then make the necessary fuel corrections in TunerPro. As mentioned above I currently don’t have a gas analyser so I would be grateful if anyone can please email me a gas analyser computer log file so I can finish the merge function and testing.
Be very careful with this as the timing of when data is requested from the ECU and actually received varies quite considerably, especially as the load is increased on the ECU. So this will cause jitter in the timing in that there is no guarantee that the AFM reading is actually the same reading as when the gas analyser took its reading. This is not a problem on a rolling road as the road is used to hold the mapping consistent so that one cell is used and so that the measurements that are received should be consistent. This means that response times are less of a worry as the tuner can wait until things settle down. Rolling road tuners gas analyser systems are usually faster responding which also helps a lot.

What this means is that the gas reading could be from one condition and the RG data from another without knowing how close or how far apart they are.

blitzracing

6,392 posts

221 months

Thursday 21st November 2013
quotequote all
He means an AFR gauge with logging output that can then be caputured and tied into the current map locations with a time stamp and RG logging. smile

Edited by blitzracing on Thursday 21st November 12:13

stevesprint

Original Poster:

1,114 posts

180 months

Thursday 21st November 2013
quotequote all
danbourassa said:
stevesprint said:
Colin & Dan, if you ever need any parts posted from the UK please do not hesitate to ask.
One Cerbera please, lightweight, Red Rose, 4.5, old style headlights, color unimportant.
Nice, only if you promise to run it on a 14CUX laugh

stevesprint

Original Poster:

1,114 posts

180 months

Thursday 21st November 2013
quotequote all
robertf03 said:
I'm at the point where I think my MAF has had it at 260k.

My willem burner still barely works, might be time to upgrade to a USB programmer
Robert - Good to see you’re still knocking around here, 260K arrr that’s k’s not miles still impressive. I would pop round and lend you my AFM for the weekend if I could, its the sort of thing that happens around here.

Sounds like it’s time to treat yourself to a new eprom programmer, my TOP8563 at £30 wouldn't break the bank and has been faultless on different speed computer, apparently it doesn’t work on 64-bit Windows.

Have you ever connected your LM-1 to a computer? Do you know if the serial output is recognisable in Hyper Terminal or does it only work with Innovate software?

When you get a chance please can you upload current the 14CUX definition file to TunerPro’s website, it contains all your original tables and scalars plus more. You can download it from www.stevesprint.com/remap-14cux/TunerPro-xdf.zip

Sorry to bombard you all at once, Cheers, Steve

Edited by stevesprint on Thursday 21st November 22:41

robertf03

59 posts

202 months

Thursday 21st November 2013
quotequote all
That is miles, not km. I meant 'k' as in thousand

I have hooked up the LM-1 to a computer. It is ascii data, I've had homebrew programs log multiple serial ports(GM ALDL data, LM-1 data, and a GPS NMEA 0183 data as the vehicle had no VSS.) I have the protocol saved in an email archive at home. I'll dig around for it this evening.

Anyone know if a 3am is compatible with a 5am MAF?