Bros, as promised, I would like to report on my experiment findings based on my sensory evaluation (ie. sound & vibration) in using a Drop-in (made by Fitch) and In-Line (made by FuelCat) fuel catalysts in my old carbie manual car.....i'm currently using stock CAI with free-flow panel filter and a MC also...
The objective of this experiment was to assess whether a lower RON petrol (ie. RON 92) can be used for a carbureted RON97 specified engine (as that was claimed by my manufacturer) without retarding the ignition timing as I would like to leave the existing settings to remain for future fuel flexibility...
Almost all carbie car users would agree usage of RON 92 would cause some loss of power and most importantly pinging problem which would be detrimental in the long term caused by detonation onto the piston head & rings...
Cost of experiment = USD50 & £65
Hoses & Clips = RM 10
Labour = DIY
Result 1 = No pinging going uphill nor overtaking without changing gears!!. Hurray!.
This was a remarkable improvement compared to without the installation of the catalyst.
Result 2 = Late down-shifting of gears will however caused pinging to occur which will not happen if using RON97 petrol . However, this will only last for about 1 or 2 seconds before adequate torque buildup will bring the engine load to normal....
Result 3 = Engine now runs even more smoother compared to RON97
Result 4 = Torque improved (probably due to better combustion) slightly by a 'butt dyno' of 5%
Result 5 = FC dunnolah as my fuel gauge needle is not that accurate to begin with.
Conclusion = My this foolish and expensive experiment fortunately gave me a successful result where otherwise a sum of RM600 would have gone down the drain. Nonetheless, I had earlier decided to take this risk as I would like to find out myself whether these 'mumbo jumbo' fuel catalyst really works.
On hindsight, I was motivated upon seeing the results on installing my own DIY Grounding Kit where to an electrical engineer, accumulating a few ground planes when my existing ground resistance of 0.1ohm at 30C would not bring any effect. But I noticed my car idle better together with my DIY VS
Hence, my old workhorse is now ready to run on lower octane petrols when the Govt introduce them in the future.