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      06-15-2012, 12:25 PM   #67
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Remove the secondary cats and and exhuast should be good for around 9 Whp.

With the Simon handheld programmer you can go 100% back to stock.
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      06-15-2012, 03:45 PM   #68
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Quote:
Originally Posted by Obioban View Post
If I do the 330 intake manifold, can you enable the DISA valves in addition to this tune?



You're saying the BMW performance exhaust, as in just the muffler, is good for 10-12 hp?

Or, putting everything together...

DISA valves + factory tune should be good for 265-270 hp crank (as that's the range for 330s to X5s with this engine and the valves)
Performance exhaust is good for 10-12
your tune adds 10-15 on top of a stock tune.

So, all 3 combined (DISA enabling AA tune, tuned for 93 octane, performance muffler) should give us 285-297 crank hp?
(range being created by adding up the least then most of the individual gains above)


And, one last question... can the flash loader revert the car back to 100% stock, in case it needs to go in for warranty work?
Quote:
Originally Posted by Andrew@ActiveAutowerke View Post
Remove the secondary cats and and exhuast should be good for around 9 Whp.

With the Simon handheld programmer you can go 100% back to stock.
That's a very different statement than the previous one by Viral that the Performance muffler alone is good for 10-12!

Sooooo... can you do the DISA valves or do we need to go elsewhere if we want to get that done?
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      06-21-2012, 12:28 PM   #69
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Bump.
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      06-21-2012, 01:11 PM   #70
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Originally Posted by Aaron09128i View Post
Bump for info on the top speed limiter.
ditto
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      06-21-2012, 06:56 PM   #71
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Performance muffler is good for maybe 1-3hp, it's still fairly restrictive. Just makes noise bleh. A full cat back or cat back with 2nd cat del would be easy 10-15hp, headers cat del would be the same
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      06-21-2012, 08:24 PM   #72
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Quote:
Originally Posted by flinchy View Post
Performance muffler is good for maybe 1-3hp, it's still fairly restrictive. Just makes noise bleh. A full cat back or cat back with 2nd cat del would be easy 10-15hp, headers cat del would be the same
i have sec cats out, it is under 10 HP, i feel more gains in low end and the previous owners dyno showed it. as well.


the intake actually add close to 10 hp. mainly because charcoal filter is restrictive in our intakes.
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      06-21-2012, 08:51 PM   #73
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charcoal intake filters? I know cabin air filters use charcoal to 'purify' air for human breathing, never heard of such a thing for engine intakes. Me thinks you've mixed things up there.
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      06-21-2012, 09:33 PM   #74
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Quote:
Originally Posted by NYC6 View Post
charcoal intake filters? I know cabin air filters use charcoal to 'purify' air for human breathing, never heard of such a thing for engine intakes. Me thinks you've mixed things up there.
the e90 n52 guys all are doing charcoal delete in the stock airbox and then use a K&n drop in.
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      06-21-2012, 09:59 PM   #75
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FYI-A quick search shows there is no 'charcoal engine intake filter' for the 128.
There are cabin air filters that contain charcoal.

Last edited by NYC6; 06-21-2012 at 10:09 PM..
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      06-22-2012, 01:49 AM   #76
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Quote:
Originally Posted by NYC6 View Post
FYI-A quick search shows there is no 'charcoal engine intake filter' for the 128.
There are cabin air filters that contain charcoal.
No, there is a small screen/filter in the stock intake box before the regular intake filter. Not sure of the benefit of it being there, but many take them out and add a k&n drop-in filter.
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      06-22-2012, 07:54 AM   #77
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Quote:
Originally Posted by Riley1524 View Post
No, there is a small screen/filter in the stock intake box before the regular intake filter. Not sure of the benefit of it being there, but many take them out and add a k&n drop-in filter.
Can you show me one that contains charcoal because I searched and couldnt find any.
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      06-22-2012, 07:56 AM   #78
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Quote:
Originally Posted by NYC6 View Post
Can you show me one that contains charcoal because I searched and couldnt find any.
Not sure really if the filter / screen contains charcoal or not. May be a figure of speech, but regardless if it is charcoal or not, its there so what does it matter?
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      06-22-2012, 08:46 AM   #79
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Quote:
Originally Posted by flinchy View Post
Performance muffler is good for maybe 1-3hp, it's still fairly restrictive. Just makes noise bleh. A full cat back or cat back with 2nd cat del would be easy 10-15hp, headers cat del would be the same
Supersprint says the headers deleting the primary cats are good for 6hp.
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      06-22-2012, 08:58 AM   #80
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Quote:
Originally Posted by Riley1524 View Post
Not sure really if the filter / screen contains charcoal or not. May be a figure of speech, but regardless if it is charcoal or not, its there so what does it matter?
Figure of speech? Now thats a stretch.

If you wish to go through life spouting incorrect information and not caring that you're wrong, so be it. Many others wish to know which is right and which is wrong, even something as mundane as charcoal intake filters.
Doesnt matter to you, got it.
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      06-22-2012, 10:18 AM   #81
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There is a permanent filter in the air box that contains a black powder. It's function is to absorb evaporating hydrocarbon vapors and thus lower emissions. Given it's appearance and function, I think it's very, very safe to presume that the substance is activated charcoal. I personally don't believe that there is any performance to be gained from removing it.
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      06-23-2012, 10:05 PM   #82
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Quote:
Originally Posted by TheSt|G View Post
Supersprint says the headers deleting the primary cats are good for 6hp.
that would be a pretty low estimate, looking at the stock headers.. well they absolutely 100% SUCK.

though considering you're talking about a 128i not a 130i, it could be closer to reality...

oh, unless they're talking about JUST deleting cats from stock headers, not going full aftermarket.. then 6 is probably bang on and a pretty solid increase
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      06-23-2012, 10:58 PM   #83
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Quote:
Originally Posted by flinchy View Post
that would be a pretty low estimate, looking at the stock headers.. well they absolutely 100% SUCK.

though considering you're talking about a 128i not a 130i, it could be closer to reality...

oh, unless they're talking about JUST deleting cats from stock headers, not going full aftermarket.. then 6 is probably bang on and a pretty solid increase
Agreed, I was hoping for a lot more. The claim with their dedicated equal length cat deleting headers that you will get 6whp in a 125i. Same engine, so I imagine our gains would be very similar.
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      06-24-2012, 03:58 AM   #84
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Quote:
Originally Posted by TheSt|G View Post
Agreed, I was hoping for a lot more. The claim with their dedicated equal length cat deleting headers that you will get 6whp in a 125i. Same engine, so I imagine our gains would be very similar.
it's usually more of a percentage thing..

in my first car (which was around 110whp stock) gained 5ish from headers, and another 5 from the cat-back

125i being 210hp and 128i being 230hp it'd probably be around the same yeah, 7ish rather than 6. i'm still going with that being very conservative.. in this market, over-estimating loses as many customers as under-estimating.

then still have to remember it's a gain somewhat all over the rev-range, peak figures are only one story.
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      06-24-2012, 08:35 AM   #85
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Quote:
Originally Posted by flinchy View Post
it's usually more of a percentage thing..

in my first car (which was around 110whp stock) gained 5ish from headers, and another 5 from the cat-back

125i being 210hp and 128i being 230hp it'd probably be around the same yeah, 7ish rather than 6. i'm still going with that being very conservative.. in this market, over-estimating loses as many customers as under-estimating.

then still have to remember it's a gain somewhat all over the rev-range, peak figures are only one story.
Yup. I can't find the dyno graph at the moment, but it was an equal 6hp across the entire rev band. Supersprint is known for accurate figures too.
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      06-24-2012, 10:08 AM   #86
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Quote:
Originally Posted by Bimmer-Bob View Post
I personally don't believe that there is any performance to be gained from removing it.
The fibers are pretty coarse and it's not very thick, I can't imagine there would be any noticeable gain from removing it either.
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      06-27-2012, 07:38 PM   #87
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Quote:
Originally Posted by andrey_gta View Post
i have sec cats out, it is under 10 HP, i feel more gains in low end and the previous owners dyno showed it. as well.


the intake actually add close to 10 hp. mainly because charcoal filter is restrictive in our intakes.
yeah, secondary cats getting 10hp is HUGE since the primary cats are the truly restrictive ones

i want to see what it's like with headers AND sec cats removed with a full cat-back.
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      06-28-2012, 09:44 AM   #88
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Quote:
Originally Posted by flinchy View Post
yeah, secondary cats getting 10hp is HUGE since the primary cats are the truly restrictive ones

i want to see what it's like with headers AND sec cats removed with a full cat-back.
Watch any e90post guy who has MMW headers.
there is one with just secondary cats no muffler. Loud car
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