Hi,

I have a PFC with a base map currently. I have my car booked in to have some 1000cc primary and 1600cc secondaries (along with other fuel upgrades) and also to install a GM 3bar MAP sensor.

Now, my tuner is saying that my base map will not need to be changed for these mods, but I was under the impression that the 3bar MAP sensor will "shift" my maps. Am I talking bollocks?

Thanks
Martin

 

Your tuner is right. The 3bar with proper settings on the PFC can use the stock maps, however, the stock p-rows are limitied to about 19 psi. These can be changed to run whatever boost you like.

 

ok thats cool. I was hoping he knew more than me, as I'm the one handing the cash over

Cheers mate!

 

you gotta install it right and change the settings for it to read right or you'll blow up your engine fast!

GM 3bar // Function // Rx7 Factory Wiring
A // GRND // Black/Grey
B // MAP SENSOR VOLTS // Greeen/Yellow
C // 5V // Brown/White

PFC MAP Sensor Settings:
scale: 41800
offset: 0

 

nice one.. cheers SurgeMonster!

 

Thanks for the help to

 

No problem the forum members helped me do it so I'm not taking full credit!

 

very nice!!! i always wondered this...

 

I did in my car and is running like new now, no more problems with the boost, thanks and also i make this, hopefully help, thanks for everyone and their input in the subject...

 

gotta love a guy that gives back. That pic will save me some time when I install mine next week, it's getting printed and added to my documentation.

Thanks!

 

well I installed a new 3 bar map sensor.... if you weren't to change the settings using dataloggit, would it cause the car to idle all over the place...run for alittle while then completely shut off?

I don't even know if my dataloggit is working, the light comes on and i plug it to my laptop so I can change the PIM settings, but it wont read the current map that's in the car, plus if i change the settings, hit update and and what not, everything is still the same...is there any specific way to make sure your dataloggit is working, or any specific order you need to do things to get it to work?

 

Any pics of it installed? I dont know where I should mount this...

 

What happens to the P side of the map when we install the 3bar map?

Do we need to rescale it? If i put the 6270 and 0 on option to and click option 2 without changing the Map reference would the car still run same as before?

Thanks

 

It may not run exactly the same. The Apex'i default scaling for the FD stock MAP sensor tends to read the manifold pressure a little bit low.

 

Thanks got it! was just confused at start but I understand now that when we enter the map calibration and offset i should theoretically read the same on the Map

 

my settings wont allow 5 numbers to be input. when i put 41800 it reverts to 9830 and itll idle rough.

 

The 41800 number is for the old Datalogit software that was specific to the FD. Divide that number by 6.66 and you will get the value for the current Universal FC-Edit software. So instead of 41800 you would use 6276. There are a couple different values floating around that people are using for the GM sensor.

 

ahh that explains a few things. thanks.

 

Howi can't change the p-rows for 38 psi ?

 

38psi boost pressure would require a 4 bar MAP sensor, a custom MAP sensor calibration, and custom scaling of the P rows in the Power FC.

 

whi? if 3 bar ar 43psi!!.

i nees the map calibration and the acaling!!

 

Because 1 bar of the 3 bar is used for vacuum, the remaining 2 bars are for boost

 

ok this it new for me!.

i cant put a 4 bar map?

some have the scale and configuration .?