A lot of information out there on these sensors and what they do but the info is scattered and everyone doesnít have a specific spot to go to toknow what sensor they can actually use for there boosted application so here it is!
Note: ďlsj has 3 map sensorsĒ 1 bar sensor, on the block/ 2 bar sensor, the scip sensor, on the top of the blowers snout, also stock in the 2nd&3rd gen camaro/ and the 2.5 tmap sensor, on the left.
(1 bar sensor) not typical used in boosted applications, but if running below 14.7 psi and donít have the intentions of going any higher, it will work! Advantages: it has more resolution for the tuner, itís stock on l61 & le5 intake manifolds as well as lsj, but for the lsj itís mounted on the block. Disadvantages: itís limitations, only reads up to 14.7psi, you still need a separate iat sensor & have to tap the manifold if supercharged, unless using the lsj 2.5 tmap sensor for iat readings. Not 100% on turbo applications if tapping is needed.
(2 bar sensor) like said itís the sensor on the s/c cobalt ss snout, and on the Camaro 2nd/3rd! Less resolution than 1 bar sensor, but more than 2.5 tmap when tuning. Also Comes stock with 2.4 gm supercharger kit, and zzp kit as well!
(2.5 tmap) best sensor for almost all boosted applications, itís a little more expensive, but can easily be found cheap from a used cobalt ss online or or the junk yard. It has the iat combined and no need to tap the manifold for 2.2 and 2.4. Resolution is lost a little tuning, but a good tuner should have no problem!
IIRC, the 1 bar sensor only read vacuum. The 2 bar read vacuum and 14.7psi of positive pressure and the 2.5 bar read vacuum and up to 21-22psi of positive pressure. 3 bar vacuum and 28 - 29psi, and just keep adding 14.7 psi for every bar you increase.
soo much miss information here. The sensors are not the limiting factor. It is the OS. Putting a 2 bar map sensor in on a jbody does not make it read boost.