Engine Tune
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Engine Tune
Engine Tuning - Engine Control Units (ECU's)
It controls amongst many other things all the ignition timing and fueling settings and would have been setup by the manufacturer in the factory with economy, reliability and drivability being the main priority.
By re-programming it (better known as remapping), the settings can be altered to produce more power from the engine it controls.
Chip Upgrades and Remapping
Modern uprated ECU chips, from the many reputable aftermarket tuning companies can improve the drivability and torque curve all the way through the revs. It should not effect the fuel economy or reliability in a major way and due to the way they are setup, but they are pre-programmed and are therefore wont give the optimum gain.
One of the main issues with the standard chip, is that the parameters and settings it controls are designed to be used on all of the engines that a manufacturer produces, and therefore has to have built in safety margins in mind, as all engines, even if of the same design, will be slightly different.
With after market performance chips this problem is not cured, as yet again, these chips, designed more for performance than fuel economy, are intended to fit in any ECU of any particular model. Again, they are not designed specifically for the one particular engine in your car and therefore must cater for the slight differences between the different engines.
On a positive note, one of the best things about chips is the ability to raise the rev limiter to a more powerful level. On some cars the rev limiter has been set to come in quite low in the rev range, e.g. : 6000 revs/min, so by raising this to a slightly higher, yet not dangerous, level, e.g. : 7200 revs/min, then more power can be reached and performance will therefore be increased.
It is widely recognised that the only way you can get the absolute optimum performance from any engine is to have the ECU completely remapped for that particular engine.
ECU Replacements
To obtain the optimum performance from your cars engine it would really need to be on a rolling road and have the ignition and fueling setup perfectly to match the other components of the engine, but as the standard systems are not programmable, a new system must be installed to store the new settings.
There are 3 options here.
Firstly is the ECU chipping method as described above, however these are usually not remappable, although remappable chips are available which will do the job.
Secondly there are piggy-back units which are basically plugged in line in order to override some of the settings of the standard ECU. However, because the complete original ECU system is still in place, there may be some controls, such as the rev limit, that will be fixed at the manufacturers setting.
Lastly, and the most effective solution, is to install a complete new programmable ECU, which once fitted, will offer complete control over the engine and all the settings that control it.
On modified cars, ECU remapping can give excellent results, making the car more driveable and refined, while maximising the benefits from all the other modifications, giving the absolute optimum performance for the specification available.
Jason Morris is the proprietor of JAYtecnik ECU Remapping Service [http://www.jaytecnik.co.uk]
About the Author
where can I find free information about how to tune the engine in my 1987 club car gas golf cart?
I started it today and I have to push the button under the seat to keep it running. This is how it ran last year. It hasn't been used since august. I removed the spark plug and it was black and fuzzy.
Most of them are tuned the same way as the ones today. The plugs get fouled in them quite often. You probably just need to change the plug. Also, make sure you are servicing it every year to keep it going. Also, you might can get some helpful information from a local golf course that uses gas carts. I am sure whoever maintains their carts can give you some helpful hints.
2011 Lexus "The Hard Way" - Engine Tuning