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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > HPF FMIC inlet/outlet too restrictive for high boost application ?



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      09-23-2011, 12:28 PM   #23
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Is it really that restrictive if the pipe that is feeding the intercooler is not any larger? I believe your bottleneck is still the piping from the turbos to the intercooler...
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      09-23-2011, 12:33 PM   #24
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it's obviously not that restrictive, I don't really understand what's the size of the pipe has anything to do with it
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      09-23-2011, 12:39 PM   #25
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is this M? lol

The pipe size matters because your fmic inlet and outlet pipe could be 8" wide but it wouldn't do a thing since it is still feeding into the motor through a much smaller pipe diameter. Being able to swap fmic in 15mins with the cclip is priceless and you don't have to worry about it coming loose over time from all the oil blow by that soaks up the silicone couplers.

btw if this is who i think it is where the hell has your car been. Haven't seen it in awhile.

Alan
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      09-23-2011, 12:40 PM   #26
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Quote:
Originally Posted by PlutoniumTans View Post
it's obviously not that restrictive, I don't really understand what's the size of the pipe has anything to do with it
The only way the the HPF intercooler (or any other intercooler for that matter) connection point is going to hinder the system (assuming end tank and core design are equally efficient) is if it is smaller than the pipe that is feeding it. I feel that the only way you can take full advantage of a larger intercooler connection point (aka AMS, ETS, etc) is if the pipe that goes from the turbos to the intercooler is also upgraded.
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      09-23-2011, 01:05 PM   #27
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Quote:
Originally Posted by Alan l. View Post
is this M? lol

The pipe size matters because your fmic inlet and outlet pipe could be 8" wide but it wouldn't do a thing since it is still feeding into the motor through a much smaller pipe diameter. Being able to swap fmic in 15mins with the cclip is priceless and you don't have to worry about it coming loose over time from all the oil blow by that soaks up the silicone couplers.

btw if this is who i think it is where the hell has your car been. Haven't seen it in awhile.

Alan
lol YES, idk it's in the hood lol, I had the hpf before if you rem, I've sold it but I kind of regret it but I'm confused lol
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      09-23-2011, 02:55 PM   #28
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I would not get HPF for the simple fact that your adding weight, that sucker weighs a ton. AMS = win for proven function and weight.
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      09-24-2011, 08:06 PM   #29
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No I wasn't talking about the pipe that's feeding the fmic, I was talking about the cold side where it's using the stock hose that narrows down to under 2 inches
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      09-27-2011, 02:28 PM   #30
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There are plenty of cars making mid to high 400whp on the stock connections. I'd take the convenience of install over the "idea" that you'll make another 3whp with a different coupler design.
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      09-27-2011, 02:45 PM   #31
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Quote:
Originally Posted by Irishace View Post
I would not get HPF for the simple fact that your adding weight, that sucker weighs a ton. AMS = win for proven function and weight.
You have to remember weight is half the benefit, an air to air intercooler is not terribly efficient, so you also rely on it being a big heat sink also to help shed heat from the air until the ambient outside airflow has time to cool it down. The heavier it is, the more heat it will store before it heat soaks or has a chance to cool down.

So heavy is actually good in this case (at least to a point!)
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      09-27-2011, 03:23 PM   #32
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Quote:
Originally Posted by Irishace View Post
I would not get HPF for the simple fact that your adding weight, that sucker weighs a ton. AMS = win for proven function and weight.
More weight in an intercooler is better, not worse.
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