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05-05-2014, 06:52 PM | #23 |
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STIG where's your dyno man? Lol it's been like a year now............
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05-05-2014, 08:02 PM | #24 | |
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This is where I get to say, N51 FTW http://www.realoem.com/bmw/showparts...76&hg=18&fg=10 |
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05-05-2014, 08:10 PM | #25 |
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Expensive? Probably cheaper - outside of superSprint and AFE there aren't any more header options -THAT's the expensive part. The exhaust is simple.
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05-05-2014, 08:51 PM | #26 | |
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631twentyeighteye is fairly local though, so we are trying to work out a time to do a pull. Free way to see real world performance of two different approaches to 128i power modding.
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05-07-2014, 10:27 PM | #28 |
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05-07-2014, 10:46 PM | #29 | |
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interesting...so any n52 headers work on the 128? and these needs the Evolve tune right, to pass emissions? |
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05-07-2014, 11:58 PM | #31 | |
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Of course. Next week is going to be my 3 Stage manifold Dyno (probably a before and after software comparison too) and then I'll install the intake and dyno that too. Later on, when my wallet recovers, I can grab that and do a final tune/dyno. |
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05-08-2014, 06:30 AM | #32 |
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Any other crap headers we can lump into this thread? Would be nice to have as a reference for what not to buy for new members.
Those bends right off the flange might as well be right angles. |
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05-08-2014, 07:06 AM | #33 |
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05-08-2014, 09:40 AM | #34 |
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Will make 0 difference once it's mounted on the car. Crap because it's not Super Sprint, lol - ok.
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05-08-2014, 10:19 AM | #35 | |
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New flash, headers aren't easy to make well. Yes, deleting cats will always get you some improvement, but that hardly means you have a well designed product. There is a reason very well respected companies like Akrapovic don't even bother trying. This has nothing to do with Supersprint, other than their headers being the benchmark in the industry. Reminds me of the recent thread on M3Forum. Everyone was getting excited for CPI stepped headers(largely a Supersprint knockoff). The vendor was making claims such as "NO other header on the market makes that much torque!", and the pictures looked appealing to the masses: And then finally someone got them and dyno'd them independently with a tune for the headers. Ended up losing torque down low and making just 15hp at the very top end. And yet another group of people wasted their money. The bottom line is you can't just crap out a set of pipes and expect it to be good. Designing a highly effective set of headers is a skill set that takes years to develop.
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05-08-2014, 10:53 AM | #36 |
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http://www.m3forum.net/m3forum/showthread.php?t=473422
My buddy really likes those headers.. You no like Frank Smith either? Last edited by MarkkyyMan; 05-08-2014 at 11:28 AM.. |
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05-08-2014, 11:13 AM | #37 | |
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I'm critical of everything you say because you really DON'T know. You made a comment about the bend and yet you ignore that these look similar to SuperSprint and the bends are no more aggressive than OEM. What experience do you have with Schmiedmann products? What do you know about header design to comment on the bends? Wow, look at those bends. (On the right is OEM and on the left is Schmiedmann.) I guess BMW doesn't know how to design headers. |
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05-08-2014, 11:55 AM | #38 | |
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What exactly is your experience again? BMW's considerations when building a header have little to do with optimization(as they have other considerations like NVH, emissions, cost), so comparing them to the aftermarket is silly at best. But given that with the exception of the S65 there are gains to be made, I would hardly use them as the pinnacle of design. Pop your hood and look at the stock crap collectors if you have any doubts. Schmiedman is not a name in the exhaust community. Those headers are the equivalent to the store brand cola. The focus is on cheapness. Just from a glance we can see that the pipes are not of equal length and the bends coming off the manifold are unnecessarily sharp in places where they don't need to be. And that's before we get into measuring what levels of inHG they are putting out and such.
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05-08-2014, 12:16 PM | #39 | |
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Similarly, this Axiom is cheaper than the 128i and provides 100% of the utility of it. Does that make it a better choice? Clearly, at some level you understand the benefit of a premium product, or you'd be driving a crappier (but just as useful and cheaper!) car.
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05-08-2014, 12:30 PM | #40 |
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Pretty sure those headers are direct copy of the SS headers (under licensed use) So now what?
HJS only offers a 2 year warranty on their catalyst, meaning they don't expect them to last as long as OEM parts, and yet are more costly. See where I'm going with this? Quality isn't a brand name. |
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05-08-2014, 01:17 PM | #42 | |
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Toyota doesn't include maintenance in their warranty period. It must mean they are expensive to maintain. See where I'm going with this?
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05-08-2014, 01:47 PM | #44 | |
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