Anyone useing the 3.3 Bar Delphi Map sensor ?

[johnv]

Hi,

Got a 3.3 Bar map sensor(factory style), looks to be plug and play for a ls6 manifold.

Just wondering what MAP scaler values you needed to get the sensor to read 101kpa at key on ? mine seem way off, needs to be set at 466 to read 101 kpa at key on.

and it runs super lean compared to running the 2 bar sensor.

also read of another user not being able to get it to read below 40kpa and had trouble with idle cruise tuneing, any feedback appreciated.

[GMPX]

There is no real formula to scaling the MAP sensor, just mess with the values until you are at 100kPa at key on (assuming you are at sea level).

[johnv]

Okay, so i set scaler to 466 and get 101kpa at key on (same as std sensor at my elevation)

but the car runs super lean, 20-22:1 at idle, would idle at around 14:1 on 2BAR sensor ,
and i would need to put huge numbers (90s)in the idle cells (VE table) to bring it back into line.

[DURAtotheMAX]

I think the new LML dmax's have this sensor too?

[johnv]

Yes i'm pretty sure thats where they originate from,
part number on box = PS10087
3.3 Bar MAP sensor Gen III style

its the same shape as std MAP just has a couple of extra tabs that need to be trimmed off,
then it will go straight in to the factory position and plug straight into the factory harness.

[GMPX]

Is the kPa reading at idle the same as the old sensor? If it's supposed to be used on a Diesel engine then they don't care about below 100kPa.

[JezzaB]

Have the same sensor to go into my TT L98 drag ute. Havent tested it out yet

[johnv]

Is the kPa reading at idle the same as the old sensor? If it's supposed to be used on a Diesel engine then they don't care about below 100kPa.

Yes logs show same kpa reading at idle and it will go back to zerrow okay free revving and letting the throttle off,

seems to follow what the 2bar sensor does and hits similar cells in VE table with same throttle and rpm, but tune is now way off and it runs super lean everywhere !!
any other map based calibrations need altering in the tune to compensate ?

[JezzaB]

Did you get this sorted out?

[johnv]

Did you get this sorted out?

Had it on the dyno today and didn't have much luck with it, the VE table was miles out neede 50% more to bring idle AFR's into line,was also idleing in 20kpa cells instead of 40-50 kpa cells so not tracking correctly in the main VE table.

So i ditched it and went back to the 2 bar sensor.

made 483 rwkw at 15psi and that was with a blowen out crossover pipe flange gasket (bolt had fallen out.found it when we unstrapped it off the dyno)