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#1 (permalink) Old 05-09-2006, 12:29 AM
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Euro HFM mod on m52b28

I am thinking of doing the 3.5" Air flow sensor (AFM, aka HFM) mod on my 2.8

Everywhere I look, it seems like it is only done on M3's

I read somewhere that the torque curve is affected so that the peak torque is reached at higher RPM. What do you know about this?

Is there any reason why I shouldn't do it on my car?

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#2 (permalink) Old 05-09-2006, 01:43 AM
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are you planning on upgrading other restrictions in your induction system?


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#3 (permalink) Old 05-09-2006, 02:05 AM
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CAI and M50 intake manifold

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#4 (permalink) Old 05-09-2006, 02:16 AM
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What's the size on those? throttle body might be restrictive as well as the CAI. I dont thinkt he m50 manifold is any larger on the intake hole.


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#5 (permalink) Old 05-09-2006, 02:20 AM
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hmmm.... will look into that. I would get a 3.5" CAI, but now you got me thinking about the throttle body. I would probably have to do from 3.5 to 3" at some point. I don't remember my gas dynamics all that well at the moment, but I am thinking it would still be better than leaving the stock AFS.

Why does it work on M3's?


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#6 (permalink) Old 05-09-2006, 02:42 AM
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My assumption is just because not a lot of companies feel like mass producing the software for a 328 with 3.5 HFM. I really can't think of any other reason at this moment.


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#7 (permalink) Old 05-09-2006, 03:23 PM
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Quote:
Originally Posted by ///M Power
My assumption is just because not a lot of companies feel like mass producing the software for a 328 with 3.5 HFM. I really can't think of any other reason at this moment.
+1 thats all i can think of too... your just the only one that wants to do that mod on a 328! :lol::lol: but no im sure if you look around or if your near a tuner shop they will map some software for you...
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#8 (permalink) Old 05-09-2006, 03:39 PM
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Quote:
Originally Posted by drz
hmmm.... will look into that. I would get a 3.5" CAI, but now you got me thinking about the throttle body. I would probably have to do from 3.5 to 3" at some point. I don't remember my gas dynamics all that well at the moment, but I am thinking it would still be better than leaving the stock AFS.

Why does it work on M3's?
The M50 manifold and the 3.5 euro hfm with larger injectors and software. thats the best recipe, the larger throttle body really doesn't make more power. A more free flowing exhaust would also help.
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#9 (permalink) Old 05-09-2006, 08:30 PM
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Quote:
Originally Posted by Active Autowerke II
The M50 manifold and the 3.5 euro hfm with larger injectors and software. thats the best recipe, the larger throttle body really doesn't make more power. A more free flowing exhaust would also help.
Thanks. I will keep that in mind.

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