GM 3 bar map sensor?
10-03-08, 09:19 AM
#1
GM 3 bar map sensor?
can anyone tell me if a GM 3 bar map sensor will work with my power FC...??? i have a 35R on a built motor and i want to run more than 20psi. will a GM map sensor work ? i herd they are all about the same........
thanks
thanks
10-03-08, 12:50 PM
#5
F'n Newbie...
iTrader: (6)
The Apexi 3-bar MAP sensor *is* plug and play, if you're willing to spend the extra money Ramy sells them (http://www.fdnewbieimports.com/Backu...2pic.php?n=60).
I'd second the Water/Meth injection idea if you're planning on pushing 20psi.
10-03-08, 02:49 PM
#6
http://www.banzai-racing.com/product...er_harness.htm
I also have one for sale in the classifieds.
10-03-08, 06:23 PM
#7
F'n Newbie...
iTrader: (6)
That is not entirely true. Sure, it will plug right in. However the stock MAP sensor sends pressure readings in three variables to the PFC, the Apexi unit also sends it's reading in these three variables/values. The GM unit only sends two variables, so the PFC needs some tinkering to make it read correctly.
The merchant you purchase the GM unit from should be able, and willing, to explain it. I called RP (from England) when I had mine installed and tuned to explain to my tuner here how to compensate for it.
I've been out to the pub all night, so my terminology in the first paragraph may be a bit off, however the underlying facts are solid.
The merchant you purchase the GM unit from should be able, and willing, to explain it. I called RP (from England) when I had mine installed and tuned to explain to my tuner here how to compensate for it.
I've been out to the pub all night, so my terminology in the first paragraph may be a bit off, however the underlying facts are solid.
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10-03-08, 08:47 PM
#8
That is not entirely true. Sure, it will plug right in. However the stock MAP sensor sends pressure readings in three variables to the PFC, the Apexi unit also sends it's reading in these three variables/values. The GM unit only sends two variables, so the PFC needs some tinkering to make it read correctly.
Like the stock or the Apexi sensors, the GM sensor is a standard 3 wire unit (power, ground, 0-5V signal). The PFC will have to be calibrated to it but that is true of any aftermarket sensor. (And given the PFC's known inaccuracies, the stock sensor should be calibrated too.)
10-06-08, 01:37 PM
#9
That is not entirely true. Sure, it will plug right in. However the stock MAP sensor sends pressure readings in three variables to the PFC, the Apexi unit also sends it's reading in these three variables/values. The GM unit only sends two variables, so the PFC needs some tinkering to make it read correctly.
The merchant you purchase the GM unit from should be able, and willing, to explain it. I called RP (from England) when I had mine installed and tuned to explain to my tuner here how to compensate for it.
I've been out to the pub all night, so my terminology in the first paragraph may be a bit off, however the underlying facts are solid.
The merchant you purchase the GM unit from should be able, and willing, to explain it. I called RP (from England) when I had mine installed and tuned to explain to my tuner here how to compensate for it.
I've been out to the pub all night, so my terminology in the first paragraph may be a bit off, however the underlying facts are solid.
http://www.banzai-racing.com/product...er_harness.htm
10-06-08, 09:03 PM
#11
Or you can buy for cheaper with a connector you can pin out yourself...
http://cgi.ebay.com/ebaymotors/GM-3-...mZ290197080349
Datalogit settings...
scale to 41800, and offset to 0 (from datalogit group, old datalogit unit)
Other calibration settings....
6750 scale, 250 offset (BDC calibration, new datalogit unit, im using this one)
Both should work.
thewird
http://cgi.ebay.com/ebaymotors/GM-3-...mZ290197080349
Code:
GM 3bar Pin out | Function | Rx7 Factory Wiring
A | GRND | Black/Grey
B | MAP SENSOR VOLTS | Green/Yellow
C | 5V | Brown/White
scale to 41800, and offset to 0 (from datalogit group, old datalogit unit)
Other calibration settings....
6750 scale, 250 offset (BDC calibration, new datalogit unit, im using this one)
Both should work.
thewird
10-07-08, 06:46 AM
#12
^
That is not very plug and play when you have to chop the connector off the harness and assemble your own connector. The correct tool to crimp the terminals on is $50+ .... and you can not switch back to the stock sensor/connector without rewiring it. I just do not see how this is a better or cheaper solution.
That is not very plug and play when you have to chop the connector off the harness and assemble your own connector. The correct tool to crimp the terminals on is $50+ .... and you can not switch back to the stock sensor/connector without rewiring it. I just do not see how this is a better or cheaper solution.
10-07-08, 11:16 AM
#14
^
That is not very plug and play when you have to chop the connector off the harness and assemble your own connector. The correct tool to crimp the terminals on is $50+ .... and you can not switch back to the stock sensor/connector without rewiring it. I just do not see how this is a better or cheaper solution.
That is not very plug and play when you have to chop the connector off the harness and assemble your own connector. The correct tool to crimp the terminals on is $50+ .... and you can not switch back to the stock sensor/connector without rewiring it. I just do not see how this is a better or cheaper solution.
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