Greddy 4-bar sensor - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


E-Manage Post your questions about greddy e-manage installation and tuning here.

Reply
 
 
 
LinkBack Thread Tools
Old 09-11-2007, 01:55 PM   #1
Junior Member
Thread Starter
 
Join Date: Aug 2007
Location: Issaquah, WA
Posts: 166
Total Cats: 0
Default Greddy 4-bar sensor

I just ordered emanage ultimate and boomslang harness for my oo'. Do I now need to order whats called a 4-bar sensor so that I can remove my MAF based system and run MAP? If so where should I buy this and how do I wire it in.
piratetim is offline   Reply With Quote
Old 09-11-2007, 03:54 PM   #2
AFM Crusader
iTrader: (18)
 
olderguy's Avatar
 
Join Date: Oct 2004
Location: Wayne, NJ
Posts: 4,438
Total Cats: 84
Default

You can buy the Greddy pressure sensor and it will plug right in and read correctly; or purchase any other MAP sensor and compensate for the difference in voltages they put out and make a connector(see archives).

Either way, you must have a MAP sensor to eliminate the MAF.
olderguy is offline   Reply With Quote
Old 09-11-2007, 04:05 PM   #3
Junior Member
Thread Starter
 
Join Date: Aug 2007
Location: Issaquah, WA
Posts: 166
Total Cats: 0
Default

ok, second question is do I have to get a pressure sensor that is universal but for the EMU or is there a sensor that is for miatas and the emu.
piratetim is offline   Reply With Quote
Old 09-12-2007, 12:35 PM   #4
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago (Over two miles from Wrigley Field. Fuck the Cubs. Fuck them in their smarmy goat-hole.)
Posts: 26,317
Total Cats: 1,914
Default

There is only one 4-bar MAP sensor for all EMUs. It's about halfway down this page: http://www.mohdparts.com/emanage/index.html Search for P/N 16401301 and also buy the harness listed just below it.
Joe Perez is offline   Reply With Quote
Old 09-12-2007, 02:19 PM   #5
Senior Member
 
boostinsteve's Avatar
 
Join Date: Oct 2006
Location: Honolulu, HI
Posts: 563
Total Cats: 0
Default

I bought one of the motorola 2.5bar map sensors that they use in the megasquirt, and mademy own connector. I bought the connector from compusa. Altogether, had about 23 dollars into the project total.
boostinsteve is offline   Reply With Quote
Old 09-12-2007, 02:27 PM   #6
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago (Over two miles from Wrigley Field. Fuck the Cubs. Fuck them in their smarmy goat-hole.)
Posts: 26,317
Total Cats: 1,914
Default

Yes, you can technically use any 2bar or 2.5bar MAP sensor with the EMU, so long as you don't mind doing the voltage-to-pressure conversion in your head. When I first tried using a 2bar, I kept a printed conversion table taped to the side of my monitor at all times.

Problem is that the EMUs input only scales between 0.5 to 4.5V. 2 and 2.5bar sensors OTOH usually scale from 0 to 5V. So they can't be used for AFM removal.

Personally, I don't think the aggravation of dealing with something other than the Greddy 4 bar sensor is worth the $60 savings, given the limitations imposed by the EMU software.
Joe Perez is offline   Reply With Quote
Old 11-23-2007, 03:20 AM   #7
Junior Member
iTrader: (1)
 
Join Date: Jun 2005
Location: San Jose
Posts: 213
Total Cats: 0
Default

Sorry for digging up an old post but the sites I've been looking at has the Greddy Pressure Sensor (16401301) @ 3Bar not 4. Can anyone else confirm this for me please.

sources:

http://www.greddy.com/products/displ...SubCategory=48

http://www.frsport.com/Greddy_164013...ss_p_8164.html

http://www.xenon-tuning.ee/ee/index....m=1995&to=2000
trito is offline   Reply With Quote
Old 11-26-2007, 11:31 AM   #8
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago (Over two miles from Wrigley Field. Fuck the Cubs. Fuck them in their smarmy goat-hole.)
Posts: 26,317
Total Cats: 1,914
Default

16401301 is a 4 bar sensor. The only reason I can think of to refer to it as a 3 bar is that it senses 3 bar of boost above atmospheric.

Imagine that I have a boost/vac gauge which goes up to 15 PSI. In reality, the gauge has a total range of about 30 PSI, because it starts at absolute vacuum (-14.7 PSI) and goes to +15 PSI above atmo, with "zero" (atmospheric) in the middle.


edit: further reading...

Yeah, here we go. Read the marketing copy from that FRSport place:
"The sensor is a complete sensor module that can go up to 3.0 kg/cm^2 (that's about 43 PSI)."
They're talking relative PSI, not absolute. 43 PSI relative is 4 bar absolute- three above, plus one ambient.
Joe Perez is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
MSPNPPro-MM0105: Coolant Temperature Output slomiata MEGAsquirt 5 10-07-2015 02:11 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Got bad Crank Angle Sensor and Random Misfire codes, but runs fine. Greasyman General Miata Chat 2 09-28-2015 11:44 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 04:19 PM.