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Old 19th January 2006, 04:47   #1
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Default DIY tuning gadgets for ECU under 1000$

With a limitation of 1000$ what do u think would be the most useful combination of gadgets for tuning a stock Lancer or Baleno ECU
guys u can simply add to this thread what you think is missing.. or would personally recommend from experience.
Following is a list of stuff related to only modding the stock ECU signals and not reflashing the original ECU..

e.g:
1] Wideband O2 sensor - 300$
2] Laptop based OBD II scantool software - 200$
3] Programmable piggyback AFC - 250$
4] Wiring harness to make AFC removable/plug and play type - 50$

Last edited by chetanhanda : 19th January 2006 at 04:49.
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Old 19th January 2006, 06:46   #2
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Yeah, but what are you going to tune for.....just add more fuel?
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Old 19th January 2006, 07:03   #3
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Quote:
Originally Posted by Mpower
Yeah, but what are you going to tune for.....just add more fuel?
basically looking at playing around with the AFR, there are a lot of other variables also like timing,compression, back pressure etc etc etc etc but this thread is basically AFR related.
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Old 19th January 2006, 09:16   #4
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if there are no other major mods to the car...playing around with the afr will not make any huge difference....rather just by the scantool which lets you change it directly on the ecm...lot more options
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Old 19th January 2006, 09:24   #5
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Cheapest way to manipulate AFR is to modify the FPR. But going richer than stock....you might actually lose power.
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Old 19th January 2006, 16:41   #6
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modifying fpr might not always work...one thing you got to understand is the cars are set at particular settings for optimum efficiency in regards to power and mileage as well as life of the engine...only when you change some of these components or "modify" them do you need to change the afr,fpr,ignition blah blah...else they have no major effect on performance..

eg. a car with a modded fuel map but everything else stock might be slower than a car with just a good air intake and exhaust...but a car with a high performance cam will do wonders with a fuel map to suit the cam..
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Old 19th January 2006, 16:44   #7
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The Indian Balenos work on OBD system?
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Old 19th January 2006, 17:04   #8
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With stock cars the most benefits come from the ignition timing however as you start modding the engine other parameters like fuel, load, boost etc need to be looked at, the piggy backs are also used to manipulate unconneted devices like NOS, Aquamist etc based on your parameters. Some devices also allow you to work around your rev limiters, speed limiters etc.

Hence would suggest at the first step bring your car to a position where you need the benefits of such a device before procuring them. However for turbo charged cars they can be a boon for changing parameters that the stock ECU wont handle.

Guys please feel free to add if I have missed anything also please correct if I have made a wrong statement.
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Old 19th January 2006, 18:16   #9
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The major gains will be with turbos and super charged around 30% min hikes in power and torque. As keshav and amit pointed out. no mods will have little or no effect with these devices may be 8-10% . getting 10 bhp with 1000$ ?????
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Old 19th January 2006, 21:56   #10
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Quote:
Originally Posted by chetanhanda
With a limitation of 1000$ what do u think would be the most useful combination of gadgets for tuning a stock Lancer or Baleno ECU


guys u can simply add to this thread what you think is missing.. or would personally recommend from experience.
Following is a list of stuff related to only modding the stock ECU signals and not reflashing the original ECU..

e.g:
1] Wideband O2 sensor - 300$
2] Laptop based OBD II scantool software - 200$
3] Programmable piggyback AFC - 250$
4] Wiring harness to make AFC removable/plug and play type - 50$


Are they readily available in India? Also the prices are equivalent i.e. almost same or skyhigh.


When changing parameters for power, we have to keep an eye on the exhaust also. The emission should not go beyond the limits.

If you adjust for efficiency (at the cost of power), then the effect is quite good.


RK
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Old 19th January 2006, 22:03   #11
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First of all, the maruti ecus (not the latest euro III ones) arent very good with the feedback loop.
Secondly, at WOT your afr readings are ignored.

In certain cases, AFR also has an effect on timing as well.


Summing it up- The $1000 package might make it slightly peppier in part throttle conditions.


Then again, these are from my experiences, I may be wrong..

Last edited by rdkarthik : 19th January 2006 at 22:05.
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Old 19th January 2006, 23:49   #12
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Quote:
Originally Posted by rdkarthik
Secondly, at WOT your afr readings are ignored.

In certain cases, AFR also has an effect on timing as well.


Summing it up- The $1000 package might make it slightly peppier in part throttle conditions...
How does AFR affect timing. The fuel maps are separate from spark maps.
You are right about the other 2 points. Throttle response is really good when you go below lambda=1 (rich). Another point is that it will have different effects in different cars. Cars like Palio 1.2 will benefit because they've been leaned out like crazy for FE.
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Old 20th January 2006, 12:34   #13
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Quote:
Originally Posted by Mpower
How does AFR affect timing. The fuel maps are separate from spark maps.
You are right about the other 2 points. Throttle response is really good when you go below lambda=1 (rich). Another point is that it will have different effects in different cars. Cars like Palio 1.2 will benefit because they've been leaned out like crazy for FE.

There are more to ECUs than just fuel and ignition maps although they are the primary values. Some ECUs go into retard when it sees an engine going lean, thus preventing chances of detonation. If you look at the new generation aftermarket engine management systems, they have a self tuning feature which sets up the ignition and fuelling based on afr. This again is just a base map to get you going.
If you take for example the latest santro's 32-bit ecu, it does not have primary fuel or ignition tables. Instead it has a set of formulae which are worked upton real time to get fuel and ignition values. Afr is one of the main parameters.

In fact we are currently working on systems that can suport these features.

Last edited by rdkarthik : 20th January 2006 at 12:37.
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Old 20th January 2006, 16:47   #14
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Guys if you are talking about 1000$ then it will be wiser to change the engine. Secondly when the Palio 1.2 was not tuned for FE it reached 100 in 16 odd secs and now when its tuned for FE it reaches in 20 odd secs. I think these chips are meant to be used more on German cars then our Indian made cars????
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Old 20th January 2006, 17:28   #15
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if you want to fool around with afr then the cheapest thing I can think of is a fuel pressure regulator as Mpower mentioned. You will also find the Apexi SAFC pretty useful. And you defineately have to have a wide band O2.

I didn't know they costed as little as $300. I spent more on mine. The total package shud work to 600 maybe 700
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