MAP sensor hookup relocation?
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Senior User
Joined: Aug 2006
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MAP sensor hookup relocation?
i was reading a post where guys were talking moving the map hookup to the turbo outlet so it would see a higher reading sooner and the PCM fuel sooner and higher during acceleration. anyone do this?
heres the post:
https://www.ford-trucks.com/forums/6...fueling-2.html
heres the post:
https://www.ford-trucks.com/forums/6...fueling-2.html
Posting Guru
Joined: Oct 2007
Posts: 2,225
Likes: 1
From: Farmington, Minnesota
i was reading a post where guys were talking moving the map hookup to the turbo outlet so it would see a higher reading sooner and the PCM fuel sooner and higher during acceleration. anyone do this?
heres the post:
https://www.ford-trucks.com/forums/6...fueling-2.html
heres the post:
https://www.ford-trucks.com/forums/6...fueling-2.html
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
yes that is my boost gauge..... didnt seee a damn difference... i put it there because i heard it would make a difference... plus my boost reference to my fuel regulator takes up the original spot...
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
I moved mine and thought it felt as if the turbo spooled just a tad quicker than before.
Jason, the OBA won't make any difference here. The thought is if you move the MAP line to the turbo outlet (hot) side of the spider rather than the post IC (cool) side of the spider, the MAP sensor will see boost a touch quicker and result in fueling a bit sooner. The OBA will work the same no matter which side of the spider the MAP line is on.
Jason, the OBA won't make any difference here. The thought is if you move the MAP line to the turbo outlet (hot) side of the spider rather than the post IC (cool) side of the spider, the MAP sensor will see boost a touch quicker and result in fueling a bit sooner. The OBA will work the same no matter which side of the spider the MAP line is on.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
I'm not either man. 
PMR world we live in.
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Posting Guru
Joined: Oct 2007
Posts: 2,225
Likes: 1
From: Farmington, Minnesota
I moved mine and thought it felt as if the turbo spooled just a tad quicker than before.
Jason, the OBA won't make any difference here. The thought is if you move the MAP line to the turbo outlet (hot) side of the spider rather than the post IC (cool) side of the spider, the MAP sensor will see boost a touch quicker and result in fueling a bit sooner. The OBA will work the same no matter which side of the spider the MAP line is on.
Jason, the OBA won't make any difference here. The thought is if you move the MAP line to the turbo outlet (hot) side of the spider rather than the post IC (cool) side of the spider, the MAP sensor will see boost a touch quicker and result in fueling a bit sooner. The OBA will work the same no matter which side of the spider the MAP line is on.
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Lead Driver
Joined: May 2007
Posts: 8,606
Likes: 13
From: Belair md
this is a common mod on our obs trucks when we instal intercoolers, there is a definate decrease in turbo lag on our trucks. there is no physical power gain from it. this mod may not be as noticable on your trucks since you run a smaller housing on the turbos but our bigger 1.15 housing you see a fairly large difference in response from the engine.
on mine i just got a brass tire valve stem from napa and installed it in the turbo tube, cost 2 bucks and took less then 5 minutes to do. i would still say its worth doing on your trucks even if the diference is minor, for a few dollars any increase is worth that
on mine i just got a brass tire valve stem from napa and installed it in the turbo tube, cost 2 bucks and took less then 5 minutes to do. i would still say its worth doing on your trucks even if the diference is minor, for a few dollars any increase is worth that
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
a metal tire valve stem is always flared like a flat washer and has a rubber on the inside and held on with a nut and rubber washer on the out side.....make sure the core is out of the stem when you plug in the map line..
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Senior User
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finished. took about 15 mins hardest part was finding the threaded valve stem. i can definitely feel a difference it has alittle more pep and i can deff hear the turbo spool sooner. but when i went to remore the end of the hose from the manifold it was really loose it was barely on there at all so im sure it was leaking pressure... oh well nice simple mod.
