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Old 05-10-2004, 20:37   #1 (permalink)
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Smile EA 5speed, over 700km per tank, 9.3l/100km

I've got an EA 5sp with 2.92 diff, multi point, done 320000km. Engine stock other than a programmable EMS 8860 engine management system. I have been refining the tune lately for economy and the latest tune has yielded 9.3km per 100km whereas with the same driving route and style I was previously getting around 14L per 100kms with the stock EA ECC4 (mainly clean metropolitan roads, no continuous highway driving). I've tuned most of the map where the car is driven sedately at a airfuel ratio of between 15 to 15.8 and an advance at cruise of 45 deg, and it drives perfect. I worked out that I save about $900 a year in fuel (based on 20000km driving a year).
I thoroughly recommend this mod. Its also drives heaps better. Now it will pull in 5th gear at 1200 rpm alot better than it could before and generally has better power and drivability than the factory EA computer. The fuel economy surprised me as I thought because the motor has a bit of blowby, that I couldn't improve the economy as much, but it can be done.
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Old 05-10-2004, 21:36   #2 (permalink)
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Re: EA 5speed, over 700km per tank, 9.3l/100km

sohow did u do refine the tune?
how would u go about gettin the ems 8860 n how much did it cost?
cheers, alex
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Old 05-10-2004, 21:40   #3 (permalink)
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Re: EA 5speed, over 700km per tank, 9.3l/100km

thats really good milage,

and yeah, so how did u tune it ??
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Old 05-10-2004, 22:13   #4 (permalink)
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Re: EA 5speed, over 700km per tank, 9.3l/100km

If you plant the boot though, does it lean out with your current settings at all.
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Old 05-10-2004, 22:39   #5 (permalink)
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Re: EA 5speed, over 700km per tank, 9.3l/100km

Good questiong, with such a tune, sound like it would lean out, and that would be really bad.
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Old 05-11-2004, 00:44   #6 (permalink)
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Re: EA 5speed, over 700km per tank, 9.3l/100km

well, if it is programed to run lean at 0-10% throttle, if you put your boot into it the maps will change above 10%throttle, and power maps can come into play
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Old 05-11-2004, 00:49   #7 (permalink)
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Re: EA 5speed, over 700km per tank, 9.3l/100km

how much that cost?
that sounds like something i wouldnt mind getting...
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Old 05-11-2004, 03:28   #8 (permalink)
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Re: EA 5speed, over 700km per tank, 9.3l/100km

Trying to explain engine management tuning can be a little difficult but I will do my best.
You have a fuel and ignition map where you can make as many or as few mapping points as you like. In my case I have mapping points every 500 rpm and load points at every 10kpa. The EMS 8860 also has an internal wide band sensor that tells you exactly at what fuel ratio you are running. So if you cruise at 2000 rpm and the car cruises at -70kpa you adjust the tune to read what ever fuel ratio you like at his point, in this case I tuned it at this point about 15.5:1. I tuned all the points around this cruise area, i.e 2500rpm -70kpa, -60kpa, etc at around 15.5:1. However I tuned the full throttle load points at 13:1. So all the maps are tuned correctly and there are no lean high load points.
I am running 98 octane for this tune which helps witht the economy. The factory have a conservative tune to catter for poor quality fuels that people use. With knock sensors though like in the AU they can use a more aggressive tune hence the better fuel economy. Cost. The EMS 8860 engine management system cost $1295. I make a harness that allows the EMS 8860 to be plugged straight into all EA to ED and EF auto and manual falcons. I can make this harness for $350 for manuals and $450 for autos. So its not cheap but if you do high km it will pay for itself in a couple of years. There is more power with the tune I do also. If interested contact me at tgoodlich@hotmail.com. I reckon if I reconditioned the engine with higher compression pistons and extractors and a bit of porting, plus get rid of the big mechanical fan and put electric fans on, better intake breathing, the economy would be even better
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Old 05-11-2004, 17:36   #9 (permalink)
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Re: EA 5speed, over 700km per tank, 9.3l/100km

id love to see a dyno. can you easily swap back to the ford EEC? just unplug your loom and bobs your aunty?
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Old 05-11-2004, 18:12   #10 (permalink)
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Re: EA 5speed, over 700km per tank, 9.3l/100km

i think the fact that you're cruising with a 2.92 diff and a 5 speed has a lot to do with the economy.
that works out to be about what a Auto falcon with 3.08 diff would be pulling, my car (EF GLi) is badly tuned due to LPG conversion while running on petrol my car still managed to get about 650km's for a full tank of petrol.
while it is impressive, i'm still keen on seeing a dyno reading :)
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