tt383lt1

iTrader: (3)

i need to buy a 3 bar map sensor for my lt1 and im wondering who makes a good sensor. i found some msd ones for $60 but i have no idea if there good.

denmah

iTrader: (2)

http://www.ebay.com/itm/GM-style-3-b...item1c2e9fa7f3

i use these on all my builds

9sectruck

iTrader: (9)

^^^ same here

tt383lt1

iTrader: (3)

sweet thank you. i didnt know if it was something you get what you pay for. but thanks

hellbents10

iTrader: (10)

Wow that is cheap, I am used to 70 plus pigtail connector hahaha.

V-seriesTech

iTrader: (5)

http://www.racepartsolutions.com/pro...d=JOD-72225-10

Sumter

iTrader: (3)

I'm using this one
http://www.ebay.com/itm/16040749-3BA...d4ed4d&vxp=mtr

tt383lt1

iTrader: (3)

how long have you had it for?

Sumter

iTrader: (3)

I haven't driven the car much yet with it but it was doing fine on 18-19psi

Jontall

People are starting to use the 3 Bar ZR1 Map sensor.

ZR1 map part # 12592525

Map sensor linear: 312.50 kpa
Map sensor offset: -11.25 kpa

http://www.hptuners.com/forum/showthread.php?t=35075
http://www.camaro5.com/forums//showthread.php?t=181803

stevieturbo

That link does state GM style though. SO it is a cheap copy. Not a genuine GM sensor.

denmah

iTrader: (2)

they are all GM style because of the connector, there are other map sensors, like just the element itself, or honda style etc.

just because it says GM style does not mean it isnt a chinese map sensor sunk into a 1 dollar piece of plastic like the rest of them. they all cost 1 dollar to produce

tt383lt1

iTrader: (3)

how much boost can a 3 bar handle? i know 2 bar is 29 psi. but i had a 3 bar on mine and on the dyno last time the 3 bar map took a **** and we couldnt get a 3 bar so we got a 2 bar and i went to 24 psi on a 2 bar and idk what the tuner did to achive this but the car runs fine and the a/f is good. this is also on e85 if that matters

allout06

iTrader: (11)

technically a 2-bar is good for 14.7psi, a 3 bar would be 29.4psi. Although people have gone higher.

stevieturbo

GM 3 bar sensor reads up to 310kpa.

Of course you can tune beyond this if you wish. But it leaves no room for error if something goes wrong, and leave no option for an overboost cut.

It's little different to people continuing to tune with a maxed out MAF. You can do it, but things will be compromise, especially safety

runsfromdacops

I use a omni "gm 3 bar style" map sensor. Its the old school brick style. But it works great and it was 1/3rd the price of the newer style oem ones

Chicago TDP

iTrader: (3)

What about the MAP off of a 2008+ Duramax?
I know my truck runs upper 30 PSI of boost...looking at the sensor it appears the same plug as the stock LSX Map.

Anyone want to try it out and see if it is plug and play for 3 bar???

NicD

iTrader: (7)

All of those older block style 3 bar map sensors and the diesel 3.3 bar ones have terrible resolution down low and really only go down to 40 kpa which means decel and cruise areas will be muddy. A variance of a whopping 8% accuracy is about all you can expect at the higher and lower regions of the pressure range as well. At least the newer ZR1 map sensor is a lot better in those areas but putting negative numbers in the LS1 computers doesn't work either for the offset so it would be slightly skewed anyways but at least it's an accurate sensor.

Chicago TDP

iTrader: (3)

So which is the best 3 bar sensor then?

stevieturbo

Diesels would never operate under 100kpa, so may not even read vacuum.

Best is relative. The basic GM 3 bar is well tried and tested