Maxing our map sensor
Thread Starter
Joined: Jun 2005
Posts: 2,265
Likes: 671
From: Oskaloosa, Iowa
Maxing our map sensor I’m seeing about 14 psi peak and thinking about taking off my air filter at the track. From what I’ve been told this could give me 2 more psi which would max out my 2 bar map.
Will this be similar to timing when it just references the last line? So I can make sure I have accounted for this on the last row of my VE table and should be fine?
Will this be similar to timing when it just references the last line? So I can make sure I have accounted for this on the last row of my VE table and should be fine?
9 Second Club
Joined: Nov 2003
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Likes: 185
From: Norn Iron
If you're happy just tuning the last row, on the understanding if it made more boost than expected at any time....things will go bad, then yes plenty of people have done what you propose.
It may mess up interpolation with rows directly below it...but for a few races not a huge issue.
But why not just do it right with a suitable map sensor that does cover the range you need ?
It may mess up interpolation with rows directly below it...but for a few races not a huge issue.
But why not just do it right with a suitable map sensor that does cover the range you need ?
Thread Starter
Joined: Jun 2005
Posts: 2,265
Likes: 671
From: Oskaloosa, Iowa
If you're happy just tuning the last row, on the understanding if it made more boost than expected at any time....things will go bad, then yes plenty of people have done what you propose.
It may mess up interpolation with rows directly below it...but for a few races not a huge issue.
But why not just do it right with a suitable map sensor that does cover the range you need ?
It may mess up interpolation with rows directly below it...but for a few races not a huge issue.
But why not just do it right with a suitable map sensor that does cover the range you need ?
Thread Starter
Joined: Jun 2005
Posts: 2,265
Likes: 671
From: Oskaloosa, Iowa
While I plan to do a forged short block over the winter I prefer to pull out a healthy motor. I don’t drive the car much, but when I do it’s for the purpose of going wide open throttle. The LS1 has held up to 14 psi and 6800 rpm well so far so what’s another 2 psi lol.
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Thread Starter
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From: Oskaloosa, Iowa
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O ****........maybe i shaould try some 14 psi on my ls1. My tune is always on the safe end. why o why did you have to remind me of this? lol. My trans, rear end, drive shafts, cv shafts.....are all going to really hate me. I think they hate me now as it is.
and yes. The last line is where your fueling will stop. i'd add two or three numbers of fuel to the last line....hell may 4 or 5 to be safe because you dont know what extra boost you are going to make, and then go make a hit.
OR.....
does yours get a little less boost in second gear like mine does? if so, take note of what your boost is in second gear, make a hit with out the filter and see what it goes to. then make an assessment for third gear. I probably would not make a full second gear pull and get some data on my scanner first. then work your way up in the pull and then to third gear. Maybe I'm just scared, but i like to play it safe.
and yes. The last line is where your fueling will stop. i'd add two or three numbers of fuel to the last line....hell may 4 or 5 to be safe because you dont know what extra boost you are going to make, and then go make a hit.
OR.....
does yours get a little less boost in second gear like mine does? if so, take note of what your boost is in second gear, make a hit with out the filter and see what it goes to. then make an assessment for third gear. I probably would not make a full second gear pull and get some data on my scanner first. then work your way up in the pull and then to third gear. Maybe I'm just scared, but i like to play it safe.
Thread Starter
Joined: Jun 2005
Posts: 2,265
Likes: 671
From: Oskaloosa, Iowa
O ****........maybe i shaould try some 14 psi on my ls1. My tune is always on the safe end. why o why did you have to remind me of this? lol. My trans, rear end, drive shafts, cv shafts.....are all going to really hate me. I think they hate me now as it is.
and yes. The last line is where your fueling will stop. i'd add two or three numbers of fuel to the last line....hell may 4 or 5 to be safe because you dont know what extra boost you are going to make, and then go make a hit.
OR.....
does yours get a little less boost in second gear like mine does? if so, take note of what your boost is in second gear, make a hit with out the filter and see what it goes to. then make an assessment for third gear. I probably would not make a full second gear pull and get some data on my scanner first. then work your way up in the pull and then to third gear. Maybe I'm just scared, but i like to play it safe.
and yes. The last line is where your fueling will stop. i'd add two or three numbers of fuel to the last line....hell may 4 or 5 to be safe because you dont know what extra boost you are going to make, and then go make a hit.
OR.....
does yours get a little less boost in second gear like mine does? if so, take note of what your boost is in second gear, make a hit with out the filter and see what it goes to. then make an assessment for third gear. I probably would not make a full second gear pull and get some data on my scanner first. then work your way up in the pull and then to third gear. Maybe I'm just scared, but i like to play it safe.
If you pick up anything that can be noticeable without carefully looking over your datalog, then you have a horrible air filter setup. It is possible you could see 2psi more, but it would be indicative of a more serious system problem.
Thread Starter
Joined: Jun 2005
Posts: 2,265
Likes: 671
From: Oskaloosa, Iowa
The GTO air intake tube does a 180 turn right off the blower then has a small filter to fit behind the head light. It is very restrictive and many people have picked up 2 psi by removing the filter and some even dynoed back to back and gained 25 plus rwhp just by removing the filter.