FallenCho

iTrader: (1)

I searched and came up with someone saying it's a 2.2 or 2.3. Does anyone have an exact answer to what our stock map sensor is cause I was looking at the 3 bar map sensors and figured it was an upgrade but talking to someone else who said ours was a 3 bar map sensor stock made me unsure but I doubt that it is. Anyone know for sure?

ErnieT

iTrader: (2)

Whoever told you that was wrong. You have a one bar map sensor stock which is good to about 14.7psi safe. Some push it more, but its not advisable considering the nature of our engines. A 3 bar map sensor is an upgrade and a must if you have a power fc and single turbo. If your on stock twins, its your choice, but not necessary.

rynberg

Ernie, that's not correct. MAP sensors are rated in absolute pressure, not relative. Normal atmospheric pressure is already 1 bar. Therefore, 14 psi of boost is equal to 2 bars in absolute pressure. The stock MAP sensor is indeed a 2.3 bar sensor or so -- it's good for up to 17 psi.

You only need a 3-bar MAP sensor when running over 17 psi (up to ~30 psi). The downside of running a 3-bar sensor with the PFC is reduced resolution at each boost level. I believe that many 3-bar users recalibrate the PIM table to lose some resolution in the vacuum areas to gain resolution in the boost areas.

ErnieT

iTrader: (2)

I stand corrected! But you still should do it if you have a single turbo.

Mahjik

iTrader: (1)

Depending on who you ask is whether stock MAP sensor is 1 or 2 bar.

The only time you need a 3 BAR map sensor is when you are going to run higher than 17 PSI on your boost. Regardless of whether a 3 bar is an upgrade, it's useless unless you are building boost beyond what the stock MAP sensor can handle (which is 17 PSI).

EDIT. Rynberg already posted.

FallenCho

iTrader: (1)

Thank you both for the info. Seems like the stock sensor will be good enough for a while until I get the twins as far as I can then go single. I was asking cause I'm going with an AEM EMS and needed to know the specifics just to be sure I'd be good for when I get it tuned to it's max potential.

FallenCho

iTrader: (1)

Hehe mahjik. Going on a year of ownership with the FD and still so much to learn. Being a Chevy fan boy has ruined me of being educated on boosted cars. Even though when I was 12 or so an NSX club in SF was formed and about 50 of them cruised by me and immediately I feel in love with them(bout 92') then I saw the FD and knew I had to own one but still pistons is all I knew for a while growing up. You guys all own.

Rocking Rotary

iTrader: (14)

I thought the GM sensor is far more sensitive. I have a power fC and even with the car not running I can see a cange when the throttle blades open and it never did that with the stock one.