Patch how-to: manifold air temperature logging
#241
Evolved Member
iTrader: (6)
Join Date: Jul 2005
Location: Charleston, SC
Posts: 1,228
Likes: 0
Received 0 Likes
on
0 Posts
I wish I would have had my AIT in the car prior to doing all of that. It would have been nice to have that data. The set-up you mentioned is what is in the car now..
Half of the reason I wanted to block off the EGR in the head was because my Hondata gasket was melted by my EGR temperatures I was seeing. It slowly developed an exhaust leak, and I played heck trying to find it. Who would have though you would have had an exhaust leak on the intake manifold side of the car.
#245
Evolved Member
iTrader: (6)
Join Date: Jul 2005
Location: Charleston, SC
Posts: 1,228
Likes: 0
Received 0 Likes
on
0 Posts
I actually debated that, but most of the reason i do things the way I do is because of flexability. For example, I ripped out the coolant nipples on the T/B, drilled and tapped them for 1/8" NPT plugs. If I ever wanted to re-use them I could just pull out the plugs and insert a barbed fitting.
MR Turco, I don't blame you for not wanting to pull that manifold off again. It gets to be a pain when you do it over and over and over again.
#248
EvoM Staff Alumni
iTrader: (16)
When i pulled the manifold I didn't want to put back the supporting bracket which holds the egr solenoid, in turn i wasn't sure if not having a line to the valve would cause it to blow open so i just removed everything. Block off plate and new egr gasket came to a total of $7 shipped so it wasn't a tough decision to remove everything.
#249
Evolved Member
iTrader: (8)
MRTurco, that second set of graphs makes a lot more sense and shows that the sensor actually cools off as you go WOT from cruise/idle conditions. I'm sure if you stayed WOT for longer, you would see it start to climb as the IC got hot.
Actual intake temps are likely even a few degrees cooler but there likely isn't enough temperature gradiant at that point to force the sensor to read lower then what it did. I say this because the temp drops one more count after you let off, showing it was still cooling off and just took that long to hit the next point of resolution.
I would bet that's the sensor lag that you are seeing though as true IAT likely drop almost imediately after going WOT then typically climb with boost and engine speed.
Actual intake temps are likely even a few degrees cooler but there likely isn't enough temperature gradiant at that point to force the sensor to read lower then what it did. I say this because the temp drops one more count after you let off, showing it was still cooling off and just took that long to hit the next point of resolution.
I would bet that's the sensor lag that you are seeing though as true IAT likely drop almost imediately after going WOT then typically climb with boost and engine speed.
#254
Account Disabled
iTrader: (3)
Join Date: Apr 2006
Location: USA
Posts: 1,029
Likes: 0
Received 0 Likes
on
0 Posts
I'll go one better. With no flow through the EGR tube you really will not be able to quantify, realistically speaking, the temp rise. Considering that cylinders 1 and 4 are on the outside perimeter of the engine cylinders 2 and 3 see more temperature related differentials than what you are going to get from an EGR port that isn't actually flowing any exhaust gasses.