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Old 02-26-2014, 04:17 PM   #41
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Oh okay.

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Old 02-26-2014, 05:43 PM   #42
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Flow master american series ?

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Old 02-26-2014, 08:08 PM   #43
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Quote:
Originally Posted by suss6052 View Post
IAT = intake air temperature. Although to be honest it's not iat that the intercooler helps with but rather CAT or charge air temperature as the intercooler is after the turbocharger heats and compresses the air before it goes in into the engine.

IAT is before the Turbocharger I.e. at the ducting up to and just after the air box.
You mean air charge temperature? cou:::samethingasIAT:::gh

Air, weather cold or hot, is sucked in by the turbo and then enters the compressor side. From the compressor side on the turbo, this air is compressed and moved at such a rate (even with the little TO3 turbo) it heats up exponentially! To help combat these now high air temps, from rapidly compressing air, that are about to enter the engine you use an intercooler. An intercooler functions in such a way similar to that of a radiator to cool off coolant. The intercooler is used to cool the now heated and compressed air charge before entering the engine. This is how you get your cooler IAT's, and this is how aftermarket intercooler manufactures meter their intercooler verse the stock one.

If I was an idiot, then please, by ALL MEANS explain to me why A) there is an IAT sensor on the side after the intercooler and before the TB (throttle body) and B) other boosted vehicles meter IAT's after the intercooler such as the Buick Grand National, Lancer Evolution, PT Cruiser Turbo, Cobalt SS SC and TC, list goes on. On any forced induction build with a computerized setup, you want to meter the IAT's as close to the TB as possible so that you know the temperature as it enters the intake so as to get the best reading possible for timing.

PS Focus ST's are SD (speed density) tuned. Using two IAT's one by the air filter box, and one after the intercooler. As far as I know, the first IAT is for air/fuel and the second one is for timing. Again, by all means correct me if I'm wrong.
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Old 02-26-2014, 08:11 PM   #44
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So would a bigger intercooler cool better

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Old 02-26-2014, 10:25 PM   #45
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Quote:
Originally Posted by HopnDude View Post
You mean air charge temperature? cou:::samethingasIAT:::gh

Air, weather cold or hot, is sucked in by the turbo and then enters the compressor side. From the compressor side on the turbo, this air is compressed and moved at such a rate (even with the little TO3 turbo) it heats up exponentially! To help combat these now high air temps, from rapidly compressing air, that are about to enter the engine you use an intercooler. An intercooler functions in such a way similar to that of a radiator to cool off coolant. The intercooler is used to cool the now heated and compressed air charge before entering the engine. This is how you get your cooler IAT's, and this is how aftermarket intercooler manufactures meter their intercooler verse the stock one.

If I was an idiot, then please, by ALL MEANS explain to me why A) there is an IAT sensor on the side after the intercooler and before the TB (throttle body) and B) other boosted vehicles meter IAT's after the intercooler such as the Buick Grand National, Lancer Evolution, PT Cruiser Turbo, Cobalt SS SC and TC, list goes on. On any forced induction build with a computerized setup, you want to meter the IAT's as close to the TB as possible so that you know the temperature as it enters the intake so as to get the best reading possible for timing.

PS Focus ST's are SD (speed density) tuned. Using two IAT's one by the air filter box, and one after the intercooler. As far as I know, the first IAT is for air/fuel and the second one is for timing. Again, by all means correct me if I'm wrong.
From an engineering perspective it's not the same thing.



#8 is the "MAF" Sensor on the outlet of the air cleaner assembly
#5 is the T-Map sensor at the inlet of the factory intercooler assembly to measure the post turbine air temperature
#3 is the MAP sensor just past the throttle body and is responsible for measuring the air after the intercooler as well.

Also the factory service manual refers to the sensor on the outlet of the air box as the mass air flow sensor as it's primary function is to tell the car what temperature and quantity of air is entering the car.

The second sensor is the T-MAP sensor that reads the charge air temperature at the outlet of the intercooler, and the third sensor is actually on the intake manifold just past the throttle body.

The car actually uses all three sensors, not two as you inferred. The first one is there strictly to measure the air mass, the second the compressor outlet temperature, and the third the post intercooler air temperature.



http://www.focusst.org/forum/focus-s...u-monitor.html

As a total it's all about measuring the air temperature and pressure and compensating for it, but each sensor does something a little bit differently.
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Old 02-26-2014, 10:32 PM   #46
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What would buying a bigger intercoolers do

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Old 02-26-2014, 10:33 PM   #47
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Deff want that tuner! So I can read my engine sensors

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Old 02-26-2014, 10:43 PM   #48
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Quote:
Originally Posted by wesleykeithzimmer View Post
What would buying a bigger intercoolers do

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The intercooler will remove heat energy and make the air charge more dense which means you can use the power for longer, and can enable other modifications to make more power.

This is the purpose of the intercooler, to cool the air after it's been heated up by the act of compression from the turbocharger's compressor wheel.

The stock one is fine for daily driving, but for spirited performance driving, or for extra durability a more efficient intercooler allows you to lower the air temperatures which makes for a denser air charge, and allows for more efficiency in terms of power production.
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Old 02-26-2014, 10:47 PM   #49
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When is power needed?

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Old 02-26-2014, 11:00 PM   #50
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When is power needed?

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Any time you want it.

If you don't ever use the capability of the car you might as well have bought the base Focus with it's 160 hp and 148 lb-ft of torque as it would be more efficient at 12:1 compression than the ST is on 9.3:1 compression off of boost.
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