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F10 / F11 (2011 - 2016)
The sixth generation of the BMW 5 Series Sedan (F10) was produced from 2011 - 2016 with LCI updates arriving in 2014. In the US BMW offered a hatchback 5 Series Gran Truismo (F07) and the rest of the world also go a Station Wagon/Touring version F11.

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Old 06-07-2017, 03:21 PM
_des_ _des_ is offline
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Porting n63 exhaust turbo manifolds.

Has anybody ever ported the stock N63 exhaust manifolds?

It looks like it can easily be done, but is their any proven data claiming it is worth it? Porting the exhaust manifolds will make the turbos spool up quicker.
Just curious before I make an attempt to do it. I have a reputable shop that does ALL my porting needs for my racecar.
Wont be a challenge to have him do these. But the question is, Is it worth it?
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Old 06-07-2017, 11:26 PM
F10-N52 F10-N52 is offline
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by porting the exhaust manifold, what exactly do you mean? please elaborate.

do you mean removing primary cats, or by increasing pipe airflow?
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Old 06-08-2017, 01:03 AM
_des_ _des_ is offline
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By increasing airflow.
Removing material as well as polishing.


https://youtu.be/IINbY77R4hM
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Old 06-08-2017, 02:21 AM
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Rusty34 Rusty34 is offline
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Look at the turns in the manifold you are considering, you will find a short side and a long side. The first and best gains in air flow will be to widen the turns between 2 to 4 o'clock and 8 to 10 o'clock, don't touch either long side or the short side.
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Old 06-08-2017, 02:23 AM
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Quote:
Originally Posted by _des_ View Post
By increasing airflow.
Removing material as well as polishing.

Polishing won't gain much due to the boundary layer, just do enough to get the shape right.
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Old 06-08-2017, 09:08 AM
F10-N52 F10-N52 is offline
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Quote:
Originally Posted by _des_ View Post
By increasing airflow.
Removing material as well as polishing.


Does anyone have information as to how much gains you get from this? That would probably be my question before proceeding.

My suggestion would be to get a catted (or catless) downpipe instead. Big Power gains with An ecu tune.

Unless the exhaust manifold is a bottleneck or something on your car, I think you'd be best of porting the cylinder head or getting a downpipe instead. Curious to see if there are good power gains from doing this.
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Old 06-08-2017, 04:22 PM
_des_ _des_ is offline
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Originally Posted by F10-N52 View Post
Does anyone have information as to how much gains you get from this? That would probably be my question before proceeding.

My suggestion would be to get a catted (or catless) downpipe instead. Big Power gains with An ecu tune.

Unless the exhaust manifold is a bottleneck or something on your car, I think you'd be best of porting the cylinder head or getting a downpipe instead. Curious to see if there are good power gains from doing this.
Their are always power benefits from porting things. But how much.
Yes porting the head would be a much better option, but that is thousands where as porting the exhaust manifolds be $200-300. I already have catless downpipes and tune.

In the evo wold, Porting the stock cast exhaust manifold yields 15-25whp with quicker turbo spool up. That is with a stock car. I know it may not seem like much, but every little bit made a difference.


It makes you wonder.
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Old 06-08-2017, 04:26 PM
F10-N52 F10-N52 is offline
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Originally Posted by _des_ View Post
Their are always power benefits from porting things. But how much.
Yes porting the head would be a much better option, but that is thousands where as porting the exhaust manifolds be $200-300. I already have catless downpipes and tune.

In the evo wold, Porting the stock cast exhaust manifold yields 15-25whp with quicker turbo spool up. That is with a stock car. I know it may not seem like much, but every little bit made a difference.


It makes you wonder.
You can study the exhaust manifold and get an idea of how much airflow you can free up.

In your situation, try it and be sure to leave an update with Power gains. You got nothing to lose for $2-300
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Old 06-19-2017, 10:59 PM
_des_ _des_ is offline
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Originally Posted by F10-N52 View Post
You can study the exhaust manifold and get an idea of how much airflow you can free up.

In your situation, try it and be sure to leave an update with Power gains. You got nothing to lose for $2-300
The manifolds have been ported and are being shipped back to me.
I'm going to get them coated before installing them. Maybe a dyno pull before and after

"Actually quite a bit of material removed. Should give much better spool and overall power"
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Old 06-20-2017, 10:41 AM
F10-N52 F10-N52 is offline
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Quote:
Originally Posted by _des_ View Post
The manifolds have been ported and are being shipped back to me.
I'm going to get them coated before installing them. Maybe a dyno pull before and after

"Actually quite a bit of material removed. Should give much better spool and overall power"
Nice! Great to see that you reported back.

Give it about 500km or so before you take it to the dyno - let the ECU adjust.

For the first 150km avoid full throttle pulls. After that for the next 350km try to redline it as often as you can. You'll feel the performance improve as soon as you redline it for the first time since the ecu will start to adjust.
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