Originally Posted by
polly_x
Jimbo, you cant quote "not affect" and "eventually be filled" in the same statement as its a total contradiction!
My understanding is that the sensor will work its best if the pipe is the proper length. Worth noting the standard pipe is also of solid plastic construction with rubber ends. I guess this is to stop and expansion issues. With all that in mind I am pretty sure a longer length of (I assume rubber) hose to the sensor could result in the ecu not reacting to pressure changes as quick as the MAP has been written for. (assuming its not been properly and fully re-mapped with the longer pipe).
I wont try to pretend I know about transient fueling and ignition but I believe its a function to cope with fast changes that sensors dont react quick enough too and maybe therefore affected by a MAP sensor pipe length?
Either shoot me down or give me a thumbs up someone who really knows!
sorry what i said was confusing.
i mean the pressure reading will EVENTUALLY be correct. ie it wont read 10psi if youve really got 15psi (as someone said earlier), it will still read 15psi but might read it a few milliseconds slower than it otherwise would have
i have no idea what the real world imact is of going from a 1ft length to a 2ft length as i'm not an expert, but based on common sense and experience with devices such as boost gauges, i do not beleive that it will make too much difference (altho reading above if tony said its CRITICAL then it must be)