Hi richard, just want to clarify with you that when u say e throttles are ok for most ADs, u mean they do not say anything or take action when they see it installed in your car when u bring back for servicing. The ADs themselves never issue an official document to say it is approved and will not void warranty. If something goes wrong with your throttle like tps eror code (throttle position sensor) they will likely take action if they have evidence u installed e throttle.
I myself installed a racechip response in the past. It worked as the product claimed, however it did not do what i wanted which was smthing else so i largely leave it off but installed. Until one day a tps error code was triggered. I removed the e throttle and brought it back to tan chong whom cleared the code and questioned if i installed e throttle. After that i quickly sold it off. Bear in mind i did not find it useful for my app but it does work as it claims.
Btw since this is a rschip thread, i had it in my car before but it has no effect so i also sold it away after few months. Small turbo engine car. Maybe it worka for na engine better
Sure AD will not issue approval letter one and think it is unrealistic request for them or even having authorised personnel to do so, right ??? Same with strut bar, BBK, HU, Rims, HID etc. and any mods since it adds extra effort for them to troubleshoot FOC.
Many cases >10 of errors and bros simply removed it when going back to TanChong to fix the issue and they had honour warranty to do so regardless if they had noted down or not if you had ethrottle ...not a single case of Tanchong taking any negative action.
Perhaps you car already quite powerful or your expectation is higher but both ethrottle and rschip do help in my case of ex sanny 1.6, 1.2 qashqai and 2.4 estima. Rschip only has sport and sport plus mode and more obvious positive impact at sport plus but also obvious negative FC impact albiet remains useful for my nshway road trip where safety is paramount to FC during which I will also set ethrottle sport 7 max setting.
In summary, my take is that both ethrottle and rschip are good to have since they provide driver with options which is user settable on the fly unlike custom tuning even if latter is no doubt more effective. Rschip to me is a more sophiscated ethrottle for NA car unlike ecu piggyback for turbo car with boost.