map sensor mod
Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
the valve stem i got was a good 4 or 5 inches long, i just cut the end off and bolted it in place, it came from napa, in stock item, cost 2 or 3 bucks. the map hose slip right over, perfect fit
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
Yes as stated the MAP sensor mods that are being talked about recently are the Regulator and moving the hose if you have an Intercooler.
The regulator is in place for those pushing higher boost pressures. Some trucks when boosting over 25-30 PSI start to defuel. This is different from the Superduties defueling as that is a function of the PCM. our defueling is from a Sensor that has no output reading for that high of boost so the signal gets scrambled. I have installed my regulator and set it for 24 PSI. here is a pic of it
http://good-times.webshots.com/photo...99659029swKcgK
read the description for some details on the regulator
The other mod of moving the hose helps mainly when and Intercooler is installed. The intercooler creates boost lag from the extra volume to be filled. but moving the MAP hose to the turbo outlet lets the PCM see boost faster therefore fueling faster. I learned about this mod and the one above over at TDS and did them and saw nice improvements which I reported here.
There are also other MAP sensor mods of the past that involved electronics but I am not familiar with them and they are not used any more that I know of.
BTW Joe nice job with the valve stem idea. Nice easy and clean way to make it work! Valve stems have many more uses other than tires. This was one of my creation for checking fuel pressure on a superduty
The regulator is in place for those pushing higher boost pressures. Some trucks when boosting over 25-30 PSI start to defuel. This is different from the Superduties defueling as that is a function of the PCM. our defueling is from a Sensor that has no output reading for that high of boost so the signal gets scrambled. I have installed my regulator and set it for 24 PSI. here is a pic of it
http://good-times.webshots.com/photo...99659029swKcgK
read the description for some details on the regulator
The other mod of moving the hose helps mainly when and Intercooler is installed. The intercooler creates boost lag from the extra volume to be filled. but moving the MAP hose to the turbo outlet lets the PCM see boost faster therefore fueling faster. I learned about this mod and the one above over at TDS and did them and saw nice improvements which I reported here.
There are also other MAP sensor mods of the past that involved electronics but I am not familiar with them and they are not used any more that I know of.
BTW Joe nice job with the valve stem idea. Nice easy and clean way to make it work! Valve stems have many more uses other than tires. This was one of my creation for checking fuel pressure on a superduty
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