Greddy MAP Sensor...anyone know the voltage conversion?
#1
![Default](https://my350z.com/forum/images/icons/icon1.gif)
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!
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
ETX...I think you might know the answer to this, becuase I think you are the only other person using the MAP sensor.
#2
Registered User
Join Date: Jul 2003
Location: Detroit, The Motor City
Posts: 949
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
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.
#4
Registered User
Join Date: Jul 2003
Location: Detroit, The Motor City
Posts: 949
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
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!
![Big Grin](https://my350z.com/forum/images/smilies/biggrin.gif)
Trending Topics
#8
![Default](https://my350z.com/forum/images/icons/icon1.gif)
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
#11
Registered User
iTrader: (1)
Join Date: Aug 2003
Location: Naples, FL
Posts: 405
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Originally posted by gq_626
Does this look correct? I used Excel just to make sure.![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
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.
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
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
#13
Charter Member #34
Join Date: May 2002
Location: -
Posts: 1,228
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
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.
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
he was off by 45/100 of a volt... geez... did anyone even attempt a GED?
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
#14
Registered User
Join Date: Sep 2002
Location: So Cal
Posts: 1,368
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
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.
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
Last edited by 350Now; 05-18-2004 at 03:01 PM.
#15
Registered User
Join Date: Dec 2003
Location: Florida
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Originally posted by SKiDaZZLe
geez... did anyone even attempt a GED?
geez... did anyone even attempt a GED?
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
-D
#16
![Default](https://my350z.com/forum/images/icons/icon1.gif)
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?
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
![](https://my350z.com/forum/images/smilies/icon18.gif)
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
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?
#17
Registered User
Join Date: Dec 2003
Location: Florida
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
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
#18
![Default](https://my350z.com/forum/images/icons/icon1.gif)
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. ![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
Back to the topic at hand.....can someone help me with my Voltage? Still not working correctly.
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
Back to the topic at hand.....can someone help me with my Voltage? Still not working correctly.