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(Post Link) post #1 of 14 Old 10-11-08 Thread Starter
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alftermarket ecu

Anyone here that can recommend a aftermarket ECU for the v6 3.2 gta engine?
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Re: alftermarket ecu

If you are running it in a stock 147 or 156 then you need to contact Autodelta or Glenwood. If not then you could look at Omex, DTA, Motec. I have an Omex 710. Ah motorsports do ECU's and would probably supply a base map
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Re: alftermarket ecu

thx for the info
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Re: alftermarket ecu

adaptronic and megasquirt will work aswell... depends on your budget and the amount of work you want to put in.

Bear in mind though that your car is not road legal when you use an aftermarket ecu.... carbon footprint and all...
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Re: alftermarket ecu

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Originally Posted by Cuore_Sportivo_155 View Post
Bear in mind though that your car is not road legal when you use an aftermarket ecu.... carbon footprint and all...
Why would they become any worse on emissions when running on a non-standard ECU? Surely it'd be down to the map, and if the car was running leaner with more advanced ignition it'd be cleaner burning and more fuel efficient?
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(Post Link) post #6 of 14 Old 11-11-08 Thread Starter
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Re: alftermarket ecu

I understand that there is a difference between MAP vs MAF. Any recommendation there.

Also I have noted that these are available, any one fitted the below?
HALTECH E11v2
MICROTECH LT12x

And as an alternative is there software to remap the Bosch ME7.3.x that I could supply to my tunner.
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Re: alftermarket ecu

You have to think about the coil on plug setup. Some ECUs can't handle running those in which case you would then need to switch to a 6 pole coil pack and HT leads. If you are modifying a GTA and expecting to keep all the cars other electrical functions then you will struggle. The only people i have heard about who have made the necessary electrical adaption is Glenwood. If you are building a track car that doesn't have all the other functions like asr, abs, ebd etc then you will need something like an omex 710 or dta S60/80 or comparable high end unit. I would budget a fair whack of money for a loom being made too.

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Re: alftermarket ecu

i think the only service i would miss would be the ABS. What about remapping the bosch?
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Re: alftermarket ecu

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Why would they become any worse on emissions when running on a non-standard ECU? Surely it'd be down to the map, and if the car was running leaner with more advanced ignition it'd be cleaner burning and more fuel efficient?
running leaner means NOx emmisions go through the roof... you're cleanest running around stoich like oem ecu's do.

But that's not the point, it's actually illegal to run an aftermarket ecu which hasn't been EC-tested (and the mapping definaely hasn't) for emissions and mileage.

Wether or not thisgets noticed by the MOT man, is another question... In the UK, can't you be stopped for roadside emmsions checks?
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Re: alftermarket ecu

As long as you get through an MOT emissions check I can't see any reason why the aftermarket ECU is any more illegal than an Autodelta/Reddot/whatever remap or decatting. Happily be directed to a directive that explains this but I've never heard of that before...
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Re: alftermarket ecu

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running leaner means NOx emmisions go through the roof... you're cleanest running around stoich like oem ecu's do.
Ah but I think the emissions test for MOT is done at idle, and at a steady rpm somewhere in the midrange. With hardly any load, and a throttle only slightly open, the engine even on an aftermarket ECU would be running around stoich.. When I said runniner leaner, I meant on wide open throttle, the GTA as standard runs very rich, but with an aftermarket ECU you would probably run a little leaner (but still on the rich side of stoich) for more power.

Quote:
Originally Posted by Cuore_Sportivo_155 View Post
But that's not the point, it's actually illegal to run an aftermarket ecu which hasn't been EC-tested (and the mapping definaely hasn't) for emissions and mileage.
What about remapping the standard ECU? Its certainly not illegal, unless you don't tell your insurance company. What if I scrapped the electronic ignition altogether and ran the car on carbs? Would that be illegal (assuming it made the minimum emissions standard)?

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Originally Posted by Cuore_Sportivo_155 View Post
Wether or not thisgets noticed by the MOT man, is another question... In the UK, can't you be stopped for roadside emmsions checks?
I've never heard of roadside emissions testing. You can be pulled over by the police for any reason, and if they see something defective (or illegal, I assume) about your car, they can issue you with a ticket which means you have to fix the defect and have a garage check it over within a week, or face a fine. I guess this could be used against vehicles making a lot of smoke.. There are loads in the UK that run without a cat on, except for MOT day, nothing is done about this, so I can't see aftermarket ECUs being any different..

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Re: alftermarket ecu

getting the car to run on carbs even close to the performance it gets on EFI, while maintaining it's euro2 or 3 compliance is impossible.

The cat would be useless and in practical situations destroyed quickly.

I suppose you could create a map for the sole purpose of MOT testing on your aftermarket ecu, provided it knows how to cycle between rich and lean twice per second. This is needed by the cat to work properly.
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Re: alftermarket ecu

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Originally Posted by Cuore_Sportivo_155 View Post
I suppose you could create a map for the sole purpose of MOT testing on your aftermarket ecu, provided it knows how to cycle between rich and lean twice per second. This is needed by the cat to work properly.
Is that what the standard ECU does then? I've never heard that, but I do know some degree of rich-ness is needed for cat converters to work, as British lean-burn engine development was effectively finished when the USA brought in the compulsory cat-converter laws..
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Re: alftermarket ecu

yes, a cat needs lean and rich cycles. when you are running lean the excess oxygen and to a degree NOx gets held by the cat until you run rich, then the excess co gets converted to co2 and the HC's to H2o and again co2.

It could be the other way around, not sure about that, but you get the idea I'm sure. No free Oxygen, or polutants would exit the cat except CO2 and H2O... not the most damaging items in the world...

This is easy to see when you do an emmisions test on o properly warm an working car, the Lambda value will be slightly rich (0.997-8), and it's also the reason you can't simply remove the cats if you have an extra lambda probe after it...
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