Greddy MAP Sensor...anyone know the voltage conversion?
05-16-2004, 05:51 PM
#1
Greddy MAP Sensor...anyone know the voltage conversion?
I have the Greddy MAP sensor and harness, and I am trying to retard timing using a pressure vs RPM map. This is ideal.
But I dont know how to convert the Greddy voltage into PSI...or something that I can understand? If ya ask me...its kinda messed up that Greddy doesnt include a PSI auto coversion to voltage. bastards!
I have mmHG, BAR, but no PSI.....ahhhh! Someone please help me.
ETX...I think you might know the answer to this, becuase I think you are the only other person using the MAP sensor.
But I dont know how to convert the Greddy voltage into PSI...or something that I can understand? If ya ask me...its kinda messed up that Greddy doesnt include a PSI auto coversion to voltage. bastards!
I have mmHG, BAR, but no PSI.....ahhhh! Someone please help me. ETX...I think you might know the answer to this, becuase I think you are the only other person using the MAP sensor.
05-16-2004, 06:00 PM
#2
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It's about .1vdc per psia. With the motor off (no vac) it will read about 1.49 - 1.5vdc depending on your elevation. So 5.5 psi = .55v + 1.5 = 2.5vdc at 5.5 psi.
05-17-2004, 08:06 AM
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1psi = 1.6 vdc
2psi = 1.7 vdc
3psi = 1.8 vdc
4psi = 1.9 vdc
5psi = 2.0 vdc
6psi = 2.1 vdc
7psi = 2.2 vdc
8psi = 2.3 vdc
9psi = 2.4 vdc
10psi = 2.5 vdc
It's easy, see!
2psi = 1.7 vdc
3psi = 1.8 vdc
4psi = 1.9 vdc
5psi = 2.0 vdc
6psi = 2.1 vdc
7psi = 2.2 vdc
8psi = 2.3 vdc
9psi = 2.4 vdc
10psi = 2.5 vdc
It's easy, see!
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05-18-2004, 08:49 AM
#8
its like calling up a train station to see if Train A leaves the terminal at 9:30 @ 65 mph and train B leaves in the opposite direction at 10:40 @ 90mph at what time will the distance between them be 400 miles.
you can do math right?
1.5v + (boost) x 0.1v = your answer (v)
eg
1.5v + (5.5) x0.1v = 2.05 v
you can do math right?
1.5v + (boost) x 0.1v = your answer (v)
eg
1.5v + (5.5) x0.1v = 2.05 v
05-18-2004, 10:33 AM
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Originally posted by gq_626
Does this look correct? I used Excel just to make sure.
psi greddy voltage
1 1.6
2 1.7
3 1.8
4 1.9
5 2
6 2.1
7 2.2
8 2.3
9 2.4
10 2.5
Does this look correct? I used Excel just to make sure.
psi greddy voltage
1 1.6
2 1.7
3 1.8
4 1.9
5 2
6 2.1
7 2.2
8 2.3
9 2.4
10 2.5
05-18-2004, 02:24 PM
#13
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Originally posted by gq_626
yeah...i think they were teasing him becuase he rounded...and was off by 5/100 of a Volt.
yeah...i think they were teasing him becuase he rounded...and was off by 5/100 of a Volt.
he was off by 45/100 of a volt... geez... did anyone even attempt a GED?
05-18-2004, 02:57 PM
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Originally posted by etx
It's about .1vdc per psia. With the motor off (no vac) it will read about 1.49 - 1.5vdc depending on your elevation. So 5.5 psi = .55v + 1.5 = 2.5vdc at 5.5 psi.
It's about .1vdc per psia. With the motor off (no vac) it will read about 1.49 - 1.5vdc depending on your elevation. So 5.5 psi = .55v + 1.5 = 2.5vdc at 5.5 psi.
Last edited by 350Now; 05-18-2004 at 03:01 PM.
05-18-2004, 05:18 PM
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Originally posted by SKiDaZZLe
geez... did anyone even attempt a GED?
geez... did anyone even attempt a GED?
-D
05-18-2004, 05:48 PM
#16
Originally posted by SKiDaZZLe
ha!!
he was off by 45/100 of a volt... geez... did anyone even attempt a GED?
ha!!
he was off by 45/100 of a volt... geez... did anyone even attempt a GED?
Yes, I am college edumacateded..and I have a Rescue Diver Cert and a CPR cert. Well, something is definately wrong here...becuae I entered the values, and I was boosting 7psi, and only got 4degrees of retard. Ididnt bother adusting for RPM...just plugged in a 1/1 ration of retard to boost accross the static RPM range...so at 7psi, I should be 7degress retard. The only thing that is retarded properly is my brain!
What the heck did I do wrong?
05-19-2004, 06:06 AM
#17
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Actually I was being sarcastic. 6 years of college and NO degree.
GQ:
Rescue diver? You need to get Master and then go for Dive Master (I'm assuming PADI). Then NSS-CDS and get in the caves!
-D
A lot of people go to college for 6 years.
yeah, they're called doctors
yeah, they're called doctors
Rescue diver? You need to get Master and then go for Dive Master (I'm assuming PADI). Then NSS-CDS and get in the caves!
-D
05-19-2004, 11:10 AM
#18
Actually, I can go straight to Dive Master if I want. Master SCUBA dinver cert is not needed. I used to do about 10 dives a month...been too busy the past 5 months modding my car to do any diving.
Back to the topic at hand.....can someone help me with my Voltage? Still not working correctly.
Back to the topic at hand.....can someone help me with my Voltage? Still not working correctly.
