I'm switching to SD with the EBL, so I need to pick up a MAP sensor. I was reading a little bit about the sensors themselves, and how they are (or aren't, depending who you ask) a little picky on how and where they're mounted and connected. They have to be mounted upright, with a dedicated vac. line that's as short as possible.

The LS1's have the map sensor just clipped into a grommeted hole in the intake manifold, with the port exposed directly to the plenum. Also, the LS1 MAP sensor is a smaller, less bulky package, and just seems simpler to me. It wouldn't be a problem to mount and secure one my victor manifold.



Are the TPI and LSx sensors interchangeable as far as the signal voltage goes? I know they're both 0-5v, are there any other issues that may present a problem?

 

From the limited data I have it appears as though it will work. Apparently GM standardized the 1-bar MAP output. The GM #16212460 which is used in the LS1 car is a sealed unit of the GM #16258659 sensor.

The 16258659 sensor matches the MAP sensors of the 3rd gens in output versus pressure.

So there is a good possibility that the 16212460 MAP sensor will work.

Which was also used in a boat-load of other cars. Including Honda, Isuzu, and Saturns (about '98 - '03). Which should make it an easier find in the JY.

RBob.

 

Thanks Rbob, That's good enough for me. I'll find one and give it a shot (without drilling a hole in the side of my intake for now!)

I have about an 1 1/4" gap in the side of the plenum between where the intake runners join the plenum, that should be wide enough to fit the MAP and a couple of small tapped holes for a clamp to hold it in place.

PN 16212460 supercedes to PN 12614970 at GMpartsdirect.

 

Just an update, It seems you can use a LS map sensor with a third gen ECU! I've been running my car for a week so far this spring, and haven't noticed any odd effects from this MAP sensor.

For reference, my combination is:
383 CID, '88 Trans Am GTA
1227730 with EBL P4 flash
AC Delco MAP sensor PN 12614970