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Oh No..Another 3.3 Map Sensor Thread

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Old 02-09-2015, 12:33 PM
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Default Oh No..Another 3.3 Map Sensor Thread

I need opinions on this 3.3 ebay map sensor.I have a 5.3 LM7 Gt45 ebay 68mm turbo with a truck manifold and a Holley HP LS1 wiring. I would like to utilize the stock hole in the manifold. The guy has the specs on it and it has a 2 year warranty. Here is the specs he sent me.
Read the ebay add also. http://www.ebay.com/itm/321102792450...S:1123&vxp=mtr

Volt-----kpa
0.50 – -14.7
0.75 – -11.58
1.0 – -8.45
1.25 – -5.33
1.50 – -2.20
1.75 – .93
2.00 – 4.05
2.25 – 7.18
2.50 –10.30
2.75 –13.43
3.00 –16.55
3.25 –19.68
3.50 –22.80
3.75 – 25.95
4.00 – 29.05
4.25 – 32.18

Last edited by Modchevelle; 02-16-2015 at 07:44 PM. Reason: spelling
Old 02-09-2015, 01:22 PM
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the decimal is either in the wrong place or his units are mislabeled
Old 02-14-2015, 10:24 AM
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Should I just run a Cobalt map sensor for now in my truck manifold? It will map to 14 + lbs and my wastegate spring is 10 lbs for now but I will be adding the 2nd spring once I work the bugs out of the car. I was also wondering if I added a small shot of NOS on it will the Holley Hp and the Cobalt map sensor handle it? Im very new at all this and im old school that had bbc's all my life. Thanks
Old 02-15-2015, 11:56 AM
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I guess im talking to myself
Old 02-15-2015, 12:43 PM
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You are talking to your self becuase its been covered 1000 times. Efi source has one plug and play. Been used a boat load of times on here.
Old 02-15-2015, 07:52 PM
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Originally Posted by allmotordustin
You are talking to your self becuase its been covered 1000 times. Efi source has one plug and play. Been used a boat load of times on here.
I sold it and did not like the way it fit in the intake. Maybe im wrong and im sure its been used a 1000 times but not me. Im just wondering another alternative ....Cobalt 2 bar that would fit my truck intake I guess. I read that the Duramax has a muddy resolution and not to use it. Im just open for options and if I have to plug the map hole and mount it somewhere but I have enough spaghetti all over my engine as it is.
Old 02-16-2015, 01:10 AM
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I use the DPE 2.5 bar sensor , bit pricier, but plug and play with great resolution.
Old 02-16-2015, 02:56 PM
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Originally Posted by Modchevelle
I need opinions on this 3.3 ebay map sensor.I have a 5.3 LM7 Gt45 ebay 68mm turbo with a truck manifold and a Holley HP LS1 wiring. I would like to utilize the stock hold in the manifold. The guy has the specs on it and it has a 2 year warranty. Here is the specs he sent me.
Read the ebay add also. http://www.ebay.com/itm/321102792450...S:1123&vxp=mtr

Volt-----kpa
0.50 – -14.7
0.75 – -11.58
1.0 – -8.45
1.25 – -5.33
1.50 – -2.20
1.75 – .93
2.00 – 4.05
2.25 – 7.18
2.50 –10.30
2.75 –13.43
3.00 –16.55
3.25 –19.68
3.50 –22.80
3.75 – 25.95
4.00 – 29.05
4.25 – 32.18
Just guessing, but that looks like voltage vs psi instead of kpa.
Old 02-16-2015, 07:48 PM
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Originally Posted by onfire
Just guessing, but that looks like voltage vs psi instead of kpa.
Humm? If it is then how come volts fluctuate on lower end.
Old 02-23-2015, 12:52 PM
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Originally Posted by Modchevelle
Humm? If it is then how come volts fluctuate on lower end.
That is vac. Volts on the left. Vac to boost psi on the right.
Old 02-23-2015, 12:55 PM
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Originally Posted by onfire
That is vac. Volts on the left. Vac to boost psi on the right.
Is it good or bad. The sender said its the info that cam from the manufacturer.
Old 03-01-2015, 11:35 AM
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I ended up getting this 3 bar map with a 2 year warranty. Anyone else use it? http://www.ebay.com/itm/3-BAR-MAP-SENSOR-GM-STYLE-GMC-TRANS-AM-GRAND-NATIONAL-FIREBIRD-TURBO-BOOST-/221433440920?pt=Motors_Car_Truck_Parts_Accessories&hash=item338e762a98
Old 03-01-2015, 03:18 PM
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That's commonly used. It's the old GM sensor style.
I believe it's much the same as the holley or MSD sensor,

At any rate, it will work fine



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