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      06-07-2018, 03:40 PM   #29
enemigo13
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Drives: F32 LCI 440xi citrineblack
Join Date: Nov 2015
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yes, for sure, I understand what the load is if car has stock software it is
limited by load in all rpm range and all you said is 100% true. If tuned, e.g. I limit to some load I want at low/midrange rpms to not overshoot and not make useless extra torque, but my targets at 5500-7000rpm range are way higher than turbo can do to get max hp. So, if load target is way higher than turbo can do, it tries to do its best and reach load target, right? then you can see how much mbar/psi it does with stock intercooler and with aftermarket one, same car, same conditions. In both cases it will not reach load target. But in both cases will reach some psi trying to catch target. So, you compare them at the same rpm and aftermarket intercooler will likely have some lower psi, meaning it has more pressure drop.

Quote:
Originally Posted by Jeff@TopGearSolutions View Post
Not sure if you are aware but less boost to make the same power is a good thing.

Your measurement is not conclusive of how pressure drop is measured.

These cars are tuned by load not boost. That means day to day, you will not have the same boost pressures exactly.

They target a load on the engine and boost is a derivative of the load.

In layman's terms, if you did a pull with this car to Sea Level and did another at 10,000 foot elevation, you'd see more boost at the high elevation (contrary to popular belief) because the car will actually run more boost to compensate for less oxygen in the air and it does this by targeting load.

On the same token, it will run less boost in winter and more boost in the summer, again to compensate on trying to achieve a specific load.

By no accident, with a better performing FMIC, you have reduced IAT, increased oxygen per molecule and therefore need less boost to maintain the same load.

If you want to measure pressure drop it has to be in a controlled environment just with the FMIC itself and pressurized with proper equipment.

You'll chase your tail trying to get a controlled environment on a car that doesn't target boost but actually targets load.
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