TimH wrote: ↑Sun May 09, 2021 5:43 pm
If you buy a reputable replacement sensor it should come with a calibration sheet. A KA sensor for example is nominally 0.5V=0bar and 4.5V=full range but it will have a spec sheet with it stating the 0 bar voltage "offset" (typically within a few mV of 0.5V, e.g. 0.498V) and "span" (e.g. 4.005V; so span+offset = full range. Between the two points they are linear. They are consistent enough not to need any further testing/checking/calibration other than using that information unless you are ringing the neck of the engine and running it right to the limits! In most cases just using 0.5V and 4.5V is good enough, in my opinion.
Those old Syvecs MAP sensors had a very weird calibration curve, from memory, and may have varied quite a lot sensor by sensor.
Thanks for that tim, yes it’s been confirmed this is a very old Syvecs map 4bar sensor! Probably why it’s playing up!
I have gone ahead and bought the new 4bar Syvecs map sensor from racecal. It does have a sheet with it!
If you think I shouldn’t need calibration between the old version and the up to date version I’ll go ahead and fit and run!
Otherwise I’ll need someone to calibrate it remotely.
I’ve added a pic of the new version! You can see how different they are compared to my first post picture