[ZachU]

Hey guys! I installed a 3 bar map sensor and am picking up an MPVi2 today. I need to know what parameters I need to change in the tune and what values.

Additionally, I bought the DSX baro breakout kit and would like to know what I need to change in the tune for it as well. I've searched several times and found some information but figured I'd ask on here.

Thanks in advance!

[ZachU]

I got it! Finally found the parameters on another thread....write the calibration after installing the baro breakout kit and it runs awesome!

[oldman]

I thought the breakout was for the roots guys as the LT4 has the bar post rotor, while the LT1 has it in the MAS/ MAF housing. So when an LT1 goes roots it needs the baro breakout. please elaborate as I may be just confused as to why a Procharger setup needs or can use a Baro breakout?

[wnta1ss]

Originally Posted by oldman

I thought the breakout was for the roots guys as the LT4 has the bar post rotor, while the LT1 has it in the MAS/ MAF housing. So when an LT1 goes roots it needs the baro breakout. please elaborate as I may be just confused as to why a Procharger setup needs or can use a Baro breakout?

Simple, on a Procharger kit (ECS/Paxton or Vortech too) the MAF/IAT/BARO sensor is mounted after the compressor, not before it like with a roots style blower. This means that it's now subjected to varying amounts of boost, and therefore the baro reading from it is junk. Visual aid below, Paxton blower with sensor after the compressor like the kit has you run. Note how at idle, the baro reading basically makes sense for the 200 feet ASL that the car was at, but look how as engine rpm rises and therefore blower rpm rises too, the 'baro' supposedly goes up. This run the reading went up to 17.7psi at about 4100 rpm, baro readings are absolute junk in this configuration.

[ZachU]

Originally Posted by wnta1ss

Simple, on a Procharger kit (ECS/Paxton or Vortech too) the MAF/IAT/BARO sensor is mounted after the compressor, not before it like with a roots style blower. This means that it's now subjected to varying amounts of boost, and therefore the baro reading from it is junk. Visual aid below, Paxton blower with sensor after the compressor like the kit has you run. Note how at idle, the baro reading basically makes sense for the 200 feet ASL that the car was at, but look how as engine rpm rises and therefore blower rpm rises too, the 'baro' supposedly goes up. This run the reading went up to 17.7psi at about 4100 rpm, baro readings are absolute junk in this configuration.


Attachment 1077939

Thank you for explaining that.....my LT1 is running much better than before after the baro breakout.