Un-tunable ECU's

[Joe Harlan]

I am curious as to the real number of cars that can't flash tune or add a chip or even an approved daughter board to their factory ECU. Given these three items I can't think of a Nissan that is not tunable.

[lateapex911]

Joe, good idea....but to facilitate discussion, could you define the term "Appproved mother board"? Thanks.

[Joe Harlan]

Well jake If I were re-writing the rule I would require stock ecu. Allow reflash or main process chip or an ad on daugther board that would require the spec and manufacture be approved for use. Easy stuff, I can provide a list of daughter board manufactures for Nissan and toyota. A daughter board is not a different ECU. with an approval system you could limit the function of the chips on the daughter board. but now back on track.

And please note Jake DAUGHTER board. please don't confuse the discussion by saying mother board you know thats a completely different deal.

List of cars

[RSTPerformance]

Non of the current Audi's eligable for IT competition have a computer that can be modified or chiped. We have been to SEVERAL tuning companies and offered a small fortune for development, all have come back, sorry their is nothing you can do with this computer. I tend to think they are telling the truth as these cars/motors are still used A LOT in rally cars, whom I would think could bennefit with HP more than we could.

I have no idea about the daughter you speek of...


Raymond

[Joe Harlan]

Cars Raymond, I have no idea what car are classed that you would be concerned about.

PS for you nissan guys: http://eccs.hybridka.com/ great data source.

[RSTPerformance]

ITB 1981 Audi 5+5
ITB 1981 - 1984 Audi Coupe
ITB 1985 - 1987 Audi Coupe GT
ITB 1981 - 1987 Audi 4000

ITA Audi Coupe GT (90% sure that they use the same ECU, but I may be wrong... It was a car that was built for 6 month only ('87.5) and I believe the only difference in the car was the rear disc brakes and the 2.3l motor.)


Hope that helps... I am sure that 40 or so VW's from the 80's are in the same padock... I have no idea what spacific VW cars can or can't be worked with though.

Raymond

[JimLill]

The VW A2 with CIS-E is one for the list. However, as an EE of 40 years, I still think there is hope... just harder to do!

[Z3_GoCar]

'96-'98 BMW Z3 1.9l in ITA
'96-'98 318ti in ITA
'96-'98 318i in ITA

All use Bosch M 5.2 ecu's all on the M-44 engine.

James

[jhooten]

ITS MK II Toyota Supra

[bamfp]

88-91 Civic DX and std in ITA and ITC. Has dual point injection.
70-76 914 1.7-1.8-2.0 ITC-ITB. 1.7&2.0 have D-jet FI and the 1.8 has L-jet which has an AFM. I was thinking of building one if the ECU rule changes.

Blake Meredith

[Joe Harlan]

88-91 Civic DX and std in ITA and ITC. Has dual point injection.
70-76 914 1.7-1.8-2.0 ITC-ITB. 1.7&2.0 have D-jet FI and the 1.8 has L-jet which has an AFM. I was thinking of building one if the ECU rule changes.

Blake Meredith
[/b]

Blake the open ECU rule will not fix mechanical based injection systems no matter how it is written. The AFM on the L-jet will have to stay in place and function.

[bamfp]

It is not mechanical it is electronic on the 914.

Blake Meredith

[Joe Harlan]

ITS MK II Toyota Supra
[/b]

http://www.technosquareinc.com/rom.htm

http://www.atsracing.net/atstunedrom.htm

I believe these guys can set you up with a daughterbord for that ECU.

[gran racing]

1986 & 1987 Honda Prelude si

I believe the Accords of the same vintage also have this issue.

[Joe Harlan]

1986 & 1987 Honda Prelude si

I believe the Accords of the same vintage also have this issue.
[/b]

OBDO box I believe is chipable like the nissan

http://forum.pgmfi.org/

[pfcs49]

We know it's electronic. At this juncture, the revisionists are talking about allowing whatever additional sensors you need to change to a different type of system (Mass airflow vs speed-density) but requiring that your intake air flow through the now unused airflow meter, but WTF, why not just throw all that shit away and mount a big velocity stack to your throttle body!!? (of course you'd make it the bottom of your airfilter housing so noone could accuse you of cheating) That should give you a few more ponies and the new killer advantage! This class is just TOO boring the way it's been all this time. Make my day. phil

[Joe Harlan]

It is not mechanical it is electronic on the 914.

Blake Meredith
[/b]

Blake these are an Early L-jet system no? If so there is no reason to think they are not as tunable as any other factory system. This system is run on a lot of good race cars all over the place.

[DaveITB1]

ITB '80-'83 BMW 320i
ITB '84-'86 BMW 318i

[Joe Harlan]

Dave I am confused. These are L-jet based cars with mechanical distributer that can be curved like any other and the stock box can be richened and leaned can it not? It's been a couple years since I worked on these older cars every day but I was pretty good with these systems back in the day. MY poin is I think these systems can make the gains with physical adjustment rather than even needing chips.

[Jeremy Billiel]

OBDO box I believe is chipable like the nissan

http://forum.pgmfi.org/
[/b]

Correct. Honda OBD0 is chipable, its just not mainstreem