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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 02-01-2017, 08:40 PM   #15
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I bet the oe exhaust is cheap to manufacture, thats what the engineers get paid for anyway, that wasnt my point. AFAIK kinking in pressure bending occurs on inner side of the bend, like the very little kinks you see in 2nd pic of OP. I had a chance to get a pretty close look at it in real life and I think the kink on the top of the pipe is intentional and not due to cheap manufacturing. There is not a bend in that region that would cause a kink in that direction.
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Old 02-01-2017, 09:02 PM   #16
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And yet, there's almost no power to be gained in a catback system.
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Old 02-02-2017, 01:11 AM   #17
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Originally Posted by mav1178 View Post
to illustrate my point, here's the top 100 auto parts suppliers in the world. I think like 7 of them actually have a company name identical to an automotive maker...

https://www.autonews.com/assets/PDF/CA89220617.PDF
I thought we were a bit too far down that list, and then I noticed the 2013 publish date.

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Old 02-02-2017, 05:57 AM   #18
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Originally Posted by mav1178 View Post
to illustrate my point, here's the top 100 auto parts suppliers in the world. I think like 7 of them actually have a company name identical to an automotive maker...

https://www.autonews.com/assets/PDF/CA89220617.PDF
Even those with the same name as an automaker can be run as totally separate divisions with their own separate stocks and management. Several parts on our cars are built by a division of Mitsubishi.

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Why is everyone bashing The OEM? That kink is intentional and not a manufacturing defect. I am pretty sure it does not cause a big power loss since most catback exhausts dont result in significant hp gain.

You dont see that pinch in aftermarket systems because they dont have as strict design goals when it comes to fitment and ground clearance.
We all aren't. A couple of other reasons that OEM parts are designed the way they are is speed of assembly and crash test ratings. They may have paid extra for that bend because it saves 10 seconds per unit in assembly times. Joe changing his exhaust in his driveway doesn't care about 10 seconds but when you pump millions of cars down a line a year it makes a huge difference. OEM parts are designed to break or bend I certain directions under different crash situations. The OEM exhaust will be tested to make sure it goes down and away in the event of a high speed crash. Aftermarket does not need to meet these requirements and could head right straight up if hit hard enough. There is always some sort of compromise made when changing out OEM to aftermarket.

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I thought we were a bit too far down that list, and then I noticed the 2013 publish date.

Since @Tcoat and I joined forces, we've become much stronger...
Ya that 2013 list is not even close to accurate any more. Even the 2015 info isn't correct since we were in transition that year. The state of the company speech last week said we are now #3 in the word. Doesn't sound that impressive until you scroll through just how many parts manufacturers there are.
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Old 02-02-2017, 09:42 AM   #19
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Ya that 2013 list is not even close to accurate any more. Even the 2015 info isn't correct since we were in transition that year. The state of the company speech last week said we are now #3 in the word. Doesn't sound that impressive until you scroll through just how many parts manufacturers there are.
It's always interesting to know by what metric it's measured. Cause I've always heard #2, but I know those top 2-4 seem to shift around a lot. Of course the fellas at Bosch never seem to get bumped outta the top spot.
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Old 02-02-2017, 09:58 AM   #20
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It's always interesting to know by what metric it's measured. Cause I've always heard #2, but I know those top 2-4 seem to shift around a lot. Of course the fellas at Bosch never seem to get bumped outta the top spot.
Mostly seems to be by sales numbers which is a poor measurement tool when looking at the big picture. I heard #2 for a long time as well but I am not sure if they include some of the owned by companies in that number. There is at least one sizable company that our employer owns but may be listed separately from the parent. It isn't big enough to make the top 100 but could very well be enough to bump us up a spot or two if it's sales dollars were factored in to the rest. (Especially at the rate the BRZ PPs seem to be selling)
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Old 02-02-2017, 02:20 PM   #21
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OEM parts are designed to break or bend I certain directions under different crash situations.
This is a good point... I know some OEM exhausts have a certain bend in them for crash purposes, especially the smaller kei cars in Japan.

-alex
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Old 02-02-2017, 02:42 PM   #22
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This is a good point... I know some OEM exhausts have a certain bend in them for crash purposes, especially the smaller kei cars in Japan.

-alex
Yep. Every single part of a car is designed to move away from the passenger compartment as much as possible in the event of a crash. The odds of the exhaust getting pushed through your seat are remote but still exist and that would really ruin your day!
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Old 02-02-2017, 02:50 PM   #23
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Old 02-04-2017, 07:14 PM   #24
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"Dent" or "Kink" whatever is there on every stock exhaust and no it does not impose any restriction to power that you would ever notice.

[ame="https://www.youtube.com/watch?v=azPKIjxmmdU"]Exhaust Header Bash! Testing Power Loss From Dents - Engine Masters Ep. 4 - YouTube[/ame]

For what its worth I made 335 whp through a stock mid-pipe.
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