MAP sensor error

[Mopar1973Man]

Yeah, I decided to check the WOT and boost pressure. Funny it reports my maximum boost pressure of 61 PSI. My ISSPro gauge shows barely 47 PSI maxed out running this gauge is correct. I know that this is all MAP sensor error. I figure I'd share this tidbit.

 

Edited April 1, 2019 by Mopar1973Man

[Me78569]

lol, 

for what it is worth the sensors max mapped psi is ~45 psi on 01/02's   anything above that is not worth looking at.    

[Dieselfuture]

So Quadzilla uses ecm reported psi to 16 then it goes of  map/boost sensor data to 45? Then what, all depends on  tuning after that point?

[Me78569]

0-16 psi from ecm, 

 

16 psi to whatever the sensor reads to is ecm+ sensor

 

The sensor might read to 40 or it might read to 50 but officially 45 is about the max from the late trucks that is reliable.

[AH64ID]

You need more air... or less fuel...

[Mopar1973Man]

Naw. Good fuel to air right now just pointing out that my little HX35/40 hybrid is not capable of reaching 61 PSI of boost which I think is laughable. The 47 is my typical max shown on the ISSPro gauge. I'm just pointing out don't rely on the Quadzilla gauge being it just the ECM sensors that your seeing. It's good for diagnostic work, but for accuracy. It better off having a full set of gauges than relying on the a tuner gauges. (Edge Juice, Quadzilla, Smarty Touch (partially) being that 2nd Gen its still using the same sensor. As for the 3rd Gen and up I think is different but can speak for them. 

[AH64ID]

12 hours ago, Mopar1973Man said:

 Good fuel to air right now 

 

1482° is not good fuel to air, especially empty and with it starting to backdown. 

Edited April 3, 2019 by AH64ID

[Mopar1973Man]

No longer. 1,100F and 0% back down.

 

Tune has been change since then. Also the Pyro is wrong too 1482F LOL. Actually topped out at 1350F on the ISSPro gauge.

[Dieselfuture]

On 4/2/2019 at 5:01 PM, Me78569 said:

0-16 psi from ecm, 

 

16 psi to whatever the sensor reads to is ecm+ sensor

 

The sensor might read to 40 or it might read to 50 but officially 45 is about the max from the late trucks that is reliable.

I guess what happens with people that push 80-90psi, how does qwad know how much fuel to add if sensor only goes to say 50. Guessing you just tune by smoke at that point, or dump it all in?

[Me78569]

if you are at 50 psi then you are likely at WOT and hte maps are all maxed anyways.

[AH64ID]

1 hour ago, Me78569 said:

if you are at 50 psi then you are likely at WOT and hte maps are all maxed anyways.

 

I'm guessing the maps max in the low-mid 20's?

[Me78569]

depends on the tune guys are running. most people max their fueling by 20 psi at WOT.  

[Mopar1973Man]

4 minutes ago, AH64ID said:

I'm guessing the maps max in the low-mid 20's?

 

About right. 20 and below is about right on the money abut reaching above 20 PSI you can toss the data out the window. The sensors skew more as it rises in pressure.