Anyone watch their IAT's?
#16
Evolving Member
iTrader: (5)
Join Date: Mar 2006
Location: Phila, PA
Posts: 491
Likes: 0
Received 0 Likes
on
0 Posts
Here's a great calculator that you can plug numbers into and see what effect inlet temps, compressor & IC efficiency, water/meth injection and VE have on charge temps & power,...
http://www.not2fast.com/turbo/glossary/turbo_calc.shtml
Last edited by Steve93Talon; Jul 6, 2009 at 05:38 PM.
#17
Evolved Member
iTrader: (49)
I monitor my AIT with a GM sensor in my intake manifold. I have a stock IX turbo peaking at ~25psi and tapering down to 21 psi at redline, Nisei aluminum pipes, a Perrin FMIC, and a MAP v3 ported intake manifold with heat dispersant coating and phenolic spacer gasket. During WOT pulls my temps are always within 10F of ambient.
Here is a graph comparing my manifold intake temps to the MAF intake temps during a 3rd gear pull. Ambient temp was in the low 70's. The sensors or calibrated correctly and read identical when the car is off and fully cool.
Here is a graph comparing my manifold intake temps to the MAF intake temps during a 3rd gear pull. Ambient temp was in the low 70's. The sensors or calibrated correctly and read identical when the car is off and fully cool.
Last edited by Kracka; Jul 6, 2009 at 05:47 PM.
#18
Evolved Member
iTrader: (2)
Anyway, here are the tables from the stock ECU that controls when and how much timing gets pulled due to intake air temp (as measured at the MAF) as well as the corresponding min load table:
#19
Evolved Member
iTrader: (2)
I attached a pic, pretty much like you described, I just made a template out of cardboard, transferred it to aluminum, and it just sits around the filter to isolate it from the engine bay heat.
For every degree you drop going into the turbo, you drop more than one degree out of the turbo. I think it works out to about 1.12 degrees. What this means is the cooler you can make your pre-turbo temps, the less work the IC has to do. Another thing to bear in mind is that the ECU is designed to work with the stock airbox, which draws in cool air from the grille. I'm not sure exactly how the EVO ECU is, but on a DSM the ECU will start to pull timing if charge temps get over 85F. I'd imagine the EVOs have similar safeguards built in.
Here's a great calculator that you can plug numbers into and see what effect inlet temps, compressor & IC efficiency, water/meth injection and VE have on charge temps & power,...
http://www.not2fast.com/turbo/glossary/turbo_calc.shtml
For every degree you drop going into the turbo, you drop more than one degree out of the turbo. I think it works out to about 1.12 degrees. What this means is the cooler you can make your pre-turbo temps, the less work the IC has to do. Another thing to bear in mind is that the ECU is designed to work with the stock airbox, which draws in cool air from the grille. I'm not sure exactly how the EVO ECU is, but on a DSM the ECU will start to pull timing if charge temps get over 85F. I'd imagine the EVOs have similar safeguards built in.
Here's a great calculator that you can plug numbers into and see what effect inlet temps, compressor & IC efficiency, water/meth injection and VE have on charge temps & power,...
http://www.not2fast.com/turbo/glossary/turbo_calc.shtml
You are right about the computer pulling timing based on air temps, the Evos do this too. It is definitely worthwhile keeping the air as cool as possible.
#20
Evolving Member
iTrader: (5)
Join Date: Mar 2006
Location: Phila, PA
Posts: 491
Likes: 0
Received 0 Likes
on
0 Posts
Good info, I hadn't really gone out of my way to dig for it but I figured it had to be there. Looks pretty similar to how DSMs are scaled.
#22
Evolved Member
Thread Starter
iTrader: (6)
Join Date: Mar 2009
Location: Reading, PA
Posts: 503
Likes: 0
Received 0 Likes
on
0 Posts
very good info guys!!!
Steve, that setup looks nice. I didnt even think about the ECU pulling timing by charge temps. Makes sense though as those higher temps could possibly aid to detonation.
Steve, that setup looks nice. I didnt even think about the ECU pulling timing by charge temps. Makes sense though as those higher temps could possibly aid to detonation.
#23
thats why pre turbo WI was so succesful at lowering charge temps. altho controversial on turbo damage
#25
EvoM Guru
iTrader: (50)
I monitor my AIT with a GM sensor in my intake manifold. I have a stock IX turbo peaking at ~25psi and tapering down to 21 psi at redline, Nisei aluminum pipes, a Perrin FMIC, and a MAP v3 ported intake manifold with heat dispersant coating and phenolic spacer gasket. During WOT pulls my temps are always within 10F of ambient.
Here is a graph comparing my manifold intake temps to the MAF intake temps during a 3rd gear pull. Ambient temp was in the low 70's. The sensors or calibrated correctly and read identical when the car is off and fully cool.
...
Here is a graph comparing my manifold intake temps to the MAF intake temps during a 3rd gear pull. Ambient temp was in the low 70's. The sensors or calibrated correctly and read identical when the car is off and fully cool.
...
Where did you get the phenolic spacer?
Thread
Thread Starter
Forum
Replies
Last Post
richardjh
09+ Ralliart Engine/Turbo/Drivetrain
2
Nov 9, 2010 05:08 PM