I have a boosted application and was wondering what type of MAP sensor is stock on our vehicles? I want to upgrade it if its a 1 bar since Im boosted. Also, how can I tell the difference between a 1 bar MAP and a 2 bar MAP. Thanks alot!

 

Stock is a 1 bar. If you replace it with a 2 bar what are you going to go to make the PCM work with it?

 

http://www.ebay.com/itm/GM-2BAR-MAP-...-/180782589555

And have fun..
http://www.camaroz28.com/forums/comp...uction-560089/

Sounds atrocious lol

 

So your saying that a 2 bar wont work with the stock PCM?

 

Welp, I guess I'll stick to stock until im ready to do a LS PCM conversion

 

AFAIK, it will work but you either scale the PCM to work with a 1bar or kill resolution to work with a 2bar sensor. To me, either way sounds crappy.

BUT, I am sure the old timer LT1 guys will come in spouting how it worked fine back in the day and no need to change anything etc etc.

 

Well I guess the next question is the 1 bar MAP work on my setup?

 

Sure, just don't got above negative MAP

Otherwise, talk to your tuner, I have no idea on how to make LT1 PCM work with boost.

 

PM me, I have been running boost on my LT1 since around 97, It works if you know what you are doing..1 bar comes stock, 2 bar is what you need to run boost.

 

you don't "need" a 2 bar MAP sensor to run boost on your LT1, you should get a tune appropriate to your injectors, and make sure your fuel delivery is up to snuff.

My Impala had the Turbo Technoologies kit on it for many years running 36 lb injectors and the stock MAP sensor.

Since I built that car there have been a few guys rework the stock PCM tunes/software to use a 2 bar MAP, and they likely work fine also. You can run Speed Density (MAFless) that way which does have advantages.

So check with your tuner, and Moe and see what they suggest.

But you can't just plug a 2-bar MAP into the car and have it run right.

Bob

 

Yes you can run a 1 bar but it is actually more difficult to tune than a 2 bar, it takes more calculations, and also as you say you just cannot plug in a 2 bar and go, fueling gets tricky here, I run 95 lb injectors and my IFR is set to 95lb, My idle, cruse and wot A/F are all to what is commanded, just need to know what you are doing, Been running a 2 bar supercharged and now turbo since app 97..

 

Well would you me interested in looking at my tuning tables and tell me what needs to be changed around? No one in the STL area fool with LT1's and if they do they dont understand boost that well