3 bar map install help
I installed a GM 3 bar map sensor as per the wiring dio on this forum. I then tried to reset the pim settings on option 2 to 41800 and 0 offset, but the data logit then changed my settings to 9830 and 0. I probably need to change something else, but what?:wallbash:
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You are using the new software, 41800 is the wrong number. Try 6630 offset 0
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Calibrated GM 3 bar setting; 43500/0 for FD3S or 6525/0 for Universal.
This will make the pressure readins on the Commander and Datalogit be correct. |
What I have found is that altitude plays a roll in this, 6525/0 is not good at 800ft, the 41800/0 is meant to be at sea level, 43500/0 is way off. However 41800/0 reads -50 on the commander when the car is not running at 1000 ft above sea level.
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The calibrated values are at sea level and will make the PFC and DL boost values match your boost gauge.
Relative pressure gauges are calibrated to read 0 psi at 1 ATM at sea level which is absolute pressure of 14.7 rounded. You should not calibrate for 0 psi at different altitudes. |
That is correct, you do not adjust for altitude. I have tested the 41800/0 at sea level it is correct. I did some checking this morning and 6270/0 is the direct swap for 41800/0 in the new software.
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It looks like GM's 3 bars are not that consistant as I did the one for a friend who used your wiring harness.
It was done here in SW Houston which is about 85' above sea level. The gauge used to calibrate the map sesnor is a 0 - 30 psi 6" gauge with a full scale accuracy of .05%. That is 1/2 of a percent error rate. That means at 30 psi, it would be within .15 psi. A 0-30 psi regulator was used between the air pump's 0 -300 psi regulator (set at 40) and the gauge setup. ******************** Either way it only makes a difference if you want the PFC Commander and DL to accurately show boost. You can still properly tune no matter what is displade. |
GM? with poor build quality on their electrical components???? I would've never guessed!
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So on a FC I would use the universal MAP numbers since I will be running higher boost then the FD calibration numbers?
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There very well could be some variances in the GM sensors, I have noticed even with the FD oem sensors that the commander readouts vary +/- 10 (car not running). We will be getting another shipment of GM sensors in next week sometime, I will see if there are any variations within that lot versus the ones that we currently have.
Fc3s Murray- The terms universal and FD calibrations are referring to the FCedit software being used for the DL. |
Originally Posted by cewrx7r1
(Post 8480276)
The gauge used to calibrate the map sesnor is a 0 - 30 psi 6" gauge with a full scale accuracy of .05%.m
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6630 and 0 worked for me I am about 10 ft above sea leve. it reads +.02 - +.04 depending on temp and humidity. you gotta love nj thanks for the good i:) nfo
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