I'd disagree TBF!
If a manufacturer calibrated ECU that has gone through years of testing in different climates, in various different chambers where temperature and atmospheric pressure can be adjusted at the click of a button, (which I'm sure you'll agree is much more thorough than you or I could ever achieve) requires a knock sensor, I'd say that's even more reason for a standalone to have one.
Manufacturer calibrations are also much safer for an engine, such as conservative ignition values and richer fuelling in the top end which makes an engine more det resistant anyway.
If your standalone is all geared up for Knock control, which I believe Gen90 is, it would be a bit silly not to run it.
Agreed.
I bet there isnt a single car on this forum on aftermarket that has got anywhere near perfect values in the temp correction table as the cost of doing so mapping wise would be huge and thats if the ECU you are running is even capable of accepting enough information in the first place, which unless you are on something like Autronic with a host of GPC tables etc you wont be any where close even, on something like an Omex 600 for example, its physically impossible to achieve anything like manufacturer levels of temp and pressure correction control.
And even if you have the right hardware then unless you can tune your own car and do so over a period of a couple of years to get all weather conditions (which on a highly tuned car unless you hardly use the car isnt going to be an option as the engine will wear and hence its requirements change) then with the best will in the world the best you can have on a hot day if you map your car on a cold day is an educated guess, and vice versa.
Its only possible to truely accurately map a car for the scenario its in at the point its mapped, the rest is no more than educated (or in some cases uneducated of course) guesswork, and that is why manufacturers can spend into the millions of pounds purely on developing a map, even the worlds best mapper cant have a car on a set of rollers for one day and then map it perfectly for when the temp is 20 degrees higher or lower than on the day in question, anyone who thinks otherwise just doesnt understand what goes into PROPERLY mapping a car for all situations, it just isnt something you can do in a day or two on the rollers to anything like manufacturer standards.
Going back to knock control specifically, if you are going to be running very high rpm then unless the ECU has quite sophisticated knock control strategies (not sure what the Gen90 ones are like) then you run the risk of valve train noise being misinterpreted as knock which can be one reason for not running one on a highly modified engine if running an ECU with only basic knock control rather than a 3d table etc.
Unlikely to be an issue on an F4R though of course as even 8K is a struggle, lol.
