I am about to do some street tuning and I wanna know if i should wait till i get a new 3 bar map sensor, or just do some tuning with my OEM one first...

Ideally i would like to run around 14 psi... but i wanna make it safe for now...

can i just change my map sensor later on using chrome or will it change EVERYTHING?

 

you can have have the 3 bar wired in later on and still have your OEM map plugged in but only 1 at a time..

yes your tune will be off because it will not be fed the right sigal.....

 

ok, well i just spliced the wires, so i can run one or the other... but im just wondering if it will really change things when i switch back and forth on the Crome program

 

it will matter because each map sensor is scaled differently. that is, with the same input (vacuum/boost) they output different voltages

 

but if i switch them on the program itself, will that be sufficent? or will I have to start from scratch

 

youll have to change a few things in the tune

 

but not ALL my values for timing and fuel levels?

 

actually, now that i think about it. it may be all
just depends on how crome rescales things ( i havent played w/ the software in awhile)