I couldn't find a lot of info about it, I only know about Unichip that works with it.

But my friend said, there's only one tuner for Unichip and he always play safe and don't want to push the limit of the ECU as he wants to keep his reputation.

Any idea about other ecu modification can be done? I heard that piggyback is useless. So which one will work best for this ecu?

Standalone? If yes which 1?

Really getting sick with my SVDO, have to rev frequently to remain the power.

most standalone ecu will work... because it totally replaces the oem ecu..

piggyback which interupts/changes the oem data from the ecu would not work because siemens ecu is self-learning type... means it constantly changing its data and fuel mapping... hence, whatever piggyback u install will not work...

unichip however works as it replaces the chip inside ur oem ecu... in other words, its a generic plug in performance chip....

another method available is ecu reflash... i've seen N1 reflash adverts for campro engines... since campro uses svdo ecu, should be applicable for all svdo based engines...

Oh, so do you know normally SVDO do what modification?

I mean, something that is worth for the performance given.

Like what my friend said, Unichip tuner don't push the ecu to the limit and so the bhp that can be squeezed is very limited also, don't know it's true or not.

Any other standalone ecu to recommend?

IMHO svdo can support piggyback since it only works in closed loop +- 3500rpm..

Can elaborate more brother?

The problem with the SVDO is that we cannot differentiate between fact and myth. Most of the claims are just 'my foreman says', 'i heard' kinda thing,

yes modding svdo is worth the performance given... in fact svdo is a self-learning ecu, newer generation than the much preferred mmc... but many local workshop dont know how to tune svdo ecu based on old skool style... datz why it is deemed useless and hard to tune....

in fact more n more modern cars use such kinda ecu... what makes svdo abit of failure is the programming part... modern age tuning is more towards software tuning...

means it works if rpm is below 3500??...

I have heard a Neo putting an SAFC at ZTH

a stand alone ecu is only as good as the tuner who tunes it.......
what mods have u done so far?

Not much of modification,

-HKS drop in air filter
-10.0mm spark plug cable
-iridium spark plug
-mivec extractor
-pivot blue raizin

Actually I have reach the torque that I am looking for, but the problem now is that I need to rev the car hard frequently to maintain the performance or it will become torqueless and less responsive. Sigh..

such mods does not require a standalone ecu... if there are other possibility, dont waste so much money investing a standalone ecu... unless u going to have bigger upgrade soon....

The problem now is that without modifying the ecu, the car will perform like no modification has been done after some time and have to rev hard frequently to bring back the power.

Yeah karipap ecu will relearn in a few days, one taxi driver told me his waja campro running on NGV needs to retune everyweek, dono he blow water or wut la but considering the fact that running NGV requires a more advance timing maybe there is some truth to it.

yes NGV requires more advance timing coz they have higher octane rating... yes u can maintain normal timing, but u will have sluggish performance...

if that's the case, go for a complete mmc ecu conversion........half the price of a haltech e6x, complete with a tuneable chip......

can buy a standalone ecu to solve the problem mah?

I think standalone is more flexible.

Sorry i new in car.

yes... but minimum price for a standalone cost anything above rm4k.... tuning a standalone ecu is not easy either... tuner has to tune the ecu with a fresh mapping, unlike piggyback, they jz adjust the current mapping... hence, tuning a standalone ecu is also much much more expensive...

I have the same thought.

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Added on April 29, 2009, 4:21 amThe only thing is see really helping is the Mivec header... which maddie is also insearch for.

The rest.. like no mod only..

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Added on April 29, 2009, 4:22 amLearn what and self-tune what?

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Added on April 29, 2009, 4:23 amAbove 3000rpm.


This post has been edited by drexchan: Apr 29 2009, 04:23 AM

From what i understand la the ecu whatever setting that is inputted into it, during the course of few days it will revert back to factory settings so that explains why the taxi driver have to go retuned everyweek, he say setting always lari when using NGV.

It's not designed to 'retune' itself back to the original setting. If that's the case, it's suiciding. It's designed to adapt to the new input parameters (if any), and making adjustment so that the control output falls within a predetermined range, for reliability and emission control.

If the ECU keep resetting back to base map, it's either teh car or the ECU has a problem.