08lgt317hp Posted October 4, 2010 Share Posted October 4, 2010 Has anyone used a omni power 4 bar map sensor on there legacy its a plug and play for sti's but I could not get it to work on my 08 legacy if some has used it please pm me with help Link to comment Share on other sites More sharing options...
Th3Franz Posted October 4, 2010 Share Posted October 4, 2010 What was causing you problems on your legacy? Did you adjust your tune accordingly? -Franz The end of a Legacy http://www.youtube.com/th3franz Link to comment Share on other sites More sharing options...
ClimberDHexMods Posted October 5, 2010 Share Posted October 5, 2010 google... http://forums.nasioc.com/forums/showthread.php?t=2022297 [CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER] Link to comment Share on other sites More sharing options...
08lgt317hp Posted October 5, 2010 Author Share Posted October 5, 2010 the plug is different from a sti to a legacy so i hard wired it but using sti calibrations it only reads 8psi instead of 14.65 like it should Link to comment Share on other sites More sharing options...
ClimberDHexMods Posted October 5, 2010 Share Posted October 5, 2010 EEK Are you able to scale it with your boost gauge then? Also did you do anything special to connect it to boost/vac, or just hose? [CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER] Link to comment Share on other sites More sharing options...
m sprank Posted October 5, 2010 Share Posted October 5, 2010 I have scaled two different MAP sensors for LGT. GM 3BAR and AEM 5BAR. You need to rescale for the sensor. Your ECU uses a different scale than the STi. You need some data to figure the line and slope. The math is easy. I put the equations in my write up on the GM 3BAR is the performance mod section. Get a cut sheet for the sensor and I can do the scaling in minutes. Boost gauge is just to verify. If MAP sensor reading is too far from Atmospheric pressure sensor reading pre start up, car will not start. Be careful. Link to comment Share on other sites More sharing options...
08lgt317hp Posted October 5, 2010 Author Share Posted October 5, 2010 http://lh3.ggpht.com/_ie0ZfsHon7k/TE9Uu8-oCKI/AAAAAAAABYk/8d-lf18SpYU/s1024/omnipower%204%20bar%20xfer%20f%28x%29%20psi.jpg Link to comment Share on other sites More sharing options...
08lgt317hp Posted October 5, 2010 Author Share Posted October 5, 2010 hope this is what u need if u could scale it for me that would be great thanks Link to comment Share on other sites More sharing options...
08lgt317hp Posted October 5, 2010 Author Share Posted October 5, 2010 It was only hooked up by a hose like the stock one but I did not use the stock filter Link to comment Share on other sites More sharing options...
lil_z_33 Posted October 5, 2010 Share Posted October 5, 2010 I bought one for my legacy...just awaiting delivery...I have no idea how to scale or tune, so that will be up to my tuner to take care of... m_sprank...if you could do the scaling and post up that would be awesome, I'll pass it on to my tuner incase he needs it... Link to comment Share on other sites More sharing options...
m sprank Posted October 5, 2010 Share Posted October 5, 2010 The cutsheet on the sensor shows a voltage of 0.563 at 50kPa. It shows a voltage of 4.8 at 400kPa. So, if Y = MX + B, then 400-50 = 350kPa or 58-7.25=50.75psi 0.563v 4.8v 4.8v - 0.563v = 4.237v difference 350kPa / 4.237v = 82.606kPa/v or 50.75psi / 4.237v = 11.978psi/v 400kPa = (82.606kPa x 4.8v) + B or 58psi = (11.978psi x 4.8v) + B B = 3.491kPa or B = 0.5056psi 82.606kPa = 11.981psi this is your multiplier or 11.978psi this is your multiplier 3.491kPa = 0.5063psi this is your offset or 0.5056psi this is your offset Offset on this equation is a bit odd. Multiplier is very stable. Here is the reason. Depending on when you convert to psi the offset changes. The average of the two offsets is 0.5060, I would use this. Link to comment Share on other sites More sharing options...
08lgt317hp Posted October 6, 2010 Author Share Posted October 6, 2010 I will be trying this out tonight I will post up if it works thanks m sprank Link to comment Share on other sites More sharing options...
lil_z_33 Posted October 6, 2010 Share Posted October 6, 2010 in for results... thanks sprank!!! Link to comment Share on other sites More sharing options...
spec.B Dream Posted February 17, 2011 Share Posted February 17, 2011 Any updates? I need a new MAP sensor for tuning my BNR68 Link to comment Share on other sites More sharing options...
Gambit Posted October 4, 2011 Share Posted October 4, 2011 Hey guys what multiplier did you end up using? And how was the install. Link to comment Share on other sites More sharing options...
spec.B Dream Posted October 5, 2011 Share Posted October 5, 2011 I ended up going with the GM 3BAR and sprank's excellent write up. Link to comment Share on other sites More sharing options...
Gambit Posted October 5, 2011 Share Posted October 5, 2011 Ah I see , just brought the omni will see how it tunes with the multiplier above. Link to comment Share on other sites More sharing options...
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