Im going to load my basemap into the AEM EMS today..
The basemap is my exact setup , except it used a 2 bar AEM map sensor.
I have a 3 bar GM map sensor that I was going to install, running 8psi for now

what should I do?

1. Install the 3 bar sensor, change the options in AEM to 3bar sensor & hope the tune isnt affected to much to drive

2. leave stock honda sensor in, being that im only running 8psi it should be able to handle for now?

if the tune is for a 2 bar, Im guessing the higher res of the 1bar would be OK... but going up to a 3 bar would require some tweaking, because it shows a bigger range?

either way its gonna get tuned soon, I'm just trying to make a little change as possible to it before then.

 

ur map is scaled based on that 2 bar. well, check that, it may be scaled based on that 2 bar, but its def setup for that 2 bar. when you change the map sensor, it will rescale the map, possibly yuoui can tell the min/max scale of the 3 bar to be the same as the 2 bar, and then the load break points will line up, but you really need to make a new map thats a copy of the old 2 bar map. then change the map to the 3 bvar. look at how it changed the load break points, and see if you can make it work. it can be done but you need to understand what changes when doing this. oh, if you have load based vtec engagement that will change too.




honestly, i would leave the 2 bar and eliminate all that aggravation i just described unless your gonna run more then 15psi of boost. then your forced to deal with it.

bring the map sensor with you, and if you really want to use it, let the tuner do it.

i went from oem to aem 3.5 bar. had to copy and paste the fuel/timing load points from old map to new one as best they lined up. scaled new 3.5 bar map to read -15 to +15, and then filled in the blanks and street tuned. its not ideal, but works until you get to the dyno.

be conservative if you do this. less timing/more fuel.

 

thanks for the response.

so when you say leave the 2 bar.. you mean leave the map set for a 2bar, but actually use my OEM sensor?

 

bump

 

i have a aem 3 bar forsale deception

 

i just bought an AEM 2 bar with free overnight shipping... now I dont have to mess with the basemap.. wanna buy a GM 3 bar? lol

 

If I remember correctly all you do is physically install the MAP sensor and then run the wizard for it. This sets up the calibration tables so that Xpsi is read as Xpsi by the AEM.

I don't believe it affects your breakpoints at all until you change them manually.

 

Oh, and when you do want to set up the break points you first copy your fuel map and remember at what break points it started and ended at.

Then set your new scale.

You then paste your old map into the old range (as close as possible) on the new map. So if you go from 2bar to 3bar you select the bottom 2/3rds of the new range and paste. AEM does all the conversions for you.

 

i guess i shoulda been more specific. yes install your 3 bar sensor, but scale it the same as the map in your aem ems right now, so even though it can read to 30 psi, make it only read to 15 psi. then your maps break points will be similiar if not the same.

when you go from one map sensor to another with the wizard, it rescales your break points for hte full resolution of that new mapsensor wiht out adjusting your fuel/timing values. i should know, i just went from oem -14/+10.84 map sensor to aem 3.5bar sensor that reads to 36ish psi.

you have only 16 load breakpoints, and the map sensor wizard changes them to the lowest possible/highestpossible the map sensor can read and then scales inbetween. it also changes your load based vtec engagement point. because on the old map sensor you chose say 1psi to kick on vtec, but in the back ground aem said 1psi = X voltage. well the new map sensor at X voltage is a different load, so it changes to that new corresponding load.


hope that helps.