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Ok I have a late 2006 (2007 update) V6 Grande auto.
Pretty std, K+N filter , 265-70-17 tyres , sovereign roo bar , slight lift.
On all of my motorbikes and cars I have always tried to incrementally improve them, research, trial, etc.
Since it is just me tinkering no dyno etc and pretty much a standard car I was looking for a easy to tune/plug and play system, Unichip would of been my first choice except price, and really just wanted to improve mileage and drivability not ultimate performance, at first ;-) and if I change exhaust system at a later date would like to adjust for that.
Driving my Prado it was always smooth, and while punchy it felt over fuelled, and when I put the larger tyres on, which corrected my speedo error to spot on, you could feel a little bit of the surge taken away.
So I found a device from the USA that while used with the supercharged installation where it adjusts "fuelling" and timing is Load/RPM they also make just a "fuelling" plug and play version, I purchased it got it sent over.
While I was waiting for it to arrive I was monitoring the fuel trim levels through a "Wifi ELM327 OBD II Car OBD2 Code Scanner Diagnostic Support Android IOS" brought on eBay through an app called EOBD-Facile, so I was familiar with most levels of load, ignition advance, Oxygen sensor voltage, MAF levels.
When it arrived it was a simple plug and play, my Windows 10 laptop connected to it via serial to USB cable and through the tuning software (similar to Power Commander tuning) and over three days of intentionally varyied driving conditions by my very patient wife I trimmed the map to where the instructions that came with stated was ideal settings.
I tuned basically from idle to @4500 rpm in a variety of loads/speed/gears to about 60% throttle as after this point it it goes into the mode where you require a dyno.
You can watch where the mapping is live on PC, and by watching the levels through the EOBD app you trim slowly by trail and error the MAF levels to where the fuel trims are zeroed. This would be dangerous to do with only one person driving/tuning.
I have detailed records of my mileage over 6 months with fuel usage being actual kms travelled and litres used not the read out on the dash which is mostly there for entertainment purposes ;-) so will post mileage changes when I have a few tanks completed.
Since I did not drive the car for these 3 days while tuning and a few days after when I finally got into the car I was surprised at the initial change as it felt as I almost had the smaller tyres back on, I took fuel out from pretty much everywhere so much leaner. After a week worth of stop and start,commuting driving I can definitely say there seems to be improvements, while I mostly drive for economy I will give it a good prod for fun and in a straight line there seems to be some extra urge, best I can describe as requiring less throttle for same speed.
When I finish this tank/refill I will disconnect battery to reset ECU in Prado and monitor levels agian.
There is no doubt more I could do with software and time but very happy with change vs $$.
Here is the website
http://urdusa.com/store/Electronics-...duct_info.html
Will post more at a later date.
Pretty std, K+N filter , 265-70-17 tyres , sovereign roo bar , slight lift.
On all of my motorbikes and cars I have always tried to incrementally improve them, research, trial, etc.
Since it is just me tinkering no dyno etc and pretty much a standard car I was looking for a easy to tune/plug and play system, Unichip would of been my first choice except price, and really just wanted to improve mileage and drivability not ultimate performance, at first ;-) and if I change exhaust system at a later date would like to adjust for that.
Driving my Prado it was always smooth, and while punchy it felt over fuelled, and when I put the larger tyres on, which corrected my speedo error to spot on, you could feel a little bit of the surge taken away.
So I found a device from the USA that while used with the supercharged installation where it adjusts "fuelling" and timing is Load/RPM they also make just a "fuelling" plug and play version, I purchased it got it sent over.
While I was waiting for it to arrive I was monitoring the fuel trim levels through a "Wifi ELM327 OBD II Car OBD2 Code Scanner Diagnostic Support Android IOS" brought on eBay through an app called EOBD-Facile, so I was familiar with most levels of load, ignition advance, Oxygen sensor voltage, MAF levels.
When it arrived it was a simple plug and play, my Windows 10 laptop connected to it via serial to USB cable and through the tuning software (similar to Power Commander tuning) and over three days of intentionally varyied driving conditions by my very patient wife I trimmed the map to where the instructions that came with stated was ideal settings.
I tuned basically from idle to @4500 rpm in a variety of loads/speed/gears to about 60% throttle as after this point it it goes into the mode where you require a dyno.
You can watch where the mapping is live on PC, and by watching the levels through the EOBD app you trim slowly by trail and error the MAF levels to where the fuel trims are zeroed. This would be dangerous to do with only one person driving/tuning.
I have detailed records of my mileage over 6 months with fuel usage being actual kms travelled and litres used not the read out on the dash which is mostly there for entertainment purposes ;-) so will post mileage changes when I have a few tanks completed.
Since I did not drive the car for these 3 days while tuning and a few days after when I finally got into the car I was surprised at the initial change as it felt as I almost had the smaller tyres back on, I took fuel out from pretty much everywhere so much leaner. After a week worth of stop and start,commuting driving I can definitely say there seems to be improvements, while I mostly drive for economy I will give it a good prod for fun and in a straight line there seems to be some extra urge, best I can describe as requiring less throttle for same speed.
When I finish this tank/refill I will disconnect battery to reset ECU in Prado and monitor levels agian.
There is no doubt more I could do with software and time but very happy with change vs $$.
Here is the website
http://urdusa.com/store/Electronics-...duct_info.html
Will post more at a later date.
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