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      05-30-2018, 06:58 AM   #89
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What happened to the before and after here
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      05-30-2018, 08:49 PM   #90
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Originally Posted by MEXICO NEW YORK View Post
What happened to the before and after here
Itís like in politics, 5 pages of talking and zero action.
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      05-30-2018, 09:53 PM   #91
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      06-02-2018, 11:39 AM   #92
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This is what happened to me the other day. My car has around 8k miles, upgraded PS2 turbos, DP's and factory mid pipe with factory rear.

When running the car in the dyno, pieces of the cats literally blew out the back of my exhaust.

My car is putting down around 550whp. It's obvious from the pictures that the factory mid pipe is too restrictive and that is why this happened.

I'm installing the Active mid pipe next week and I am confident that it will flow much better.
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      06-02-2018, 11:54 AM   #93
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Quote:
Originally Posted by The Flying Scotsman View Post
This is what happened to me the other day. My car has around 8k miles, upgraded PS2 turbos, DP's and factory mid pipe with factory rear.

When running the car in the dyno, pieces of the cats literally blew out the back of my exhaust.

My car is putting down around 550whp. It's obvious from the pictures that the factory mid pipe is too restrictive and that is why this happened.

I'm installing the Active mid pipe next week and I am confident that it will flow much better.
Yikes, thanks for sharing! To think that one "established" vendor swears that the stock exhaust is efficient in this very thread...

Pro tip: Don't believe everything you read on the interwebz.
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      06-02-2018, 12:11 PM   #94
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Quote:
Originally Posted by The Flying Scotsman View Post
This is what happened to me the other day. My car has around 8k miles, upgraded PS2 turbos, DP's and factory mid pipe with factory rear.

When running the car in the dyno, pieces of the cats literally blew out the back of my exhaust.

My car is putting down around 550whp. It's obvious from the pictures that the factory mid pipe is too restrictive and that is why this happened.

I'm installing the Active mid pipe next week and I am confident that it will flow much better.
What tune? I wouldn't be running stock DPs at that power level.
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      06-02-2018, 03:41 PM   #95
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What tune? I wouldn't be running stock DPs at that power level.
I read this as to say he has pure stage 2 turbos and downpipes, but had the factory midpipe, i guess indicating this is pieces of the 2ndary cats???
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      06-02-2018, 04:13 PM   #96
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Quote:
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Quote:
Originally Posted by tom @ eas View Post
What tune? I wouldn't be running stock DPs at that power level.
I read this as to say he has pure stage 2 turbos and downpipes, but had the factory midpipe, i guess indicating this is pieces of the 2ndary cats???
That is correct. I have aftermarket DP's (catless) with stock mid and stock rear.
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      06-02-2018, 04:14 PM   #97
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Quote:
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Quote:
Originally Posted by The Flying Scotsman View Post
This is what happened to me the other day. My car has around 8k miles, upgraded PS2 turbos, DP's and factory mid pipe with factory rear.

When running the car in the dyno, pieces of the cats literally blew out the back of my exhaust.

My car is putting down around 550whp. It's obvious from the pictures that the factory mid pipe is too restrictive and that is why this happened.

I'm installing the Active mid pipe next week and I am confident that it will flow much better.
What tune? I wouldn't be running stock DPs at that power level.
Active ECU flash (no piggyback)
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      06-02-2018, 06:48 PM   #98
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so when is someone going to do before and after AA midpipe that is already modded/tuned 550+whp

1000 sold... apparently all everyone's first mod
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      06-02-2018, 07:47 PM   #99
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Quote:
Originally Posted by MEXICO NEW YORK View Post
so when is someone going to do before and after AA midpipe that is already modded/tuned 550+whp

1000 sold... apparently all everyone's first mod
I agree...but even if someone does..it will still be anecdotal. We need a few independent examples to get an idea.
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      06-02-2018, 09:02 PM   #100
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Quote:
Originally Posted by MEXICO NEW YORK View Post
so when is someone going to do before and after AA midpipe that is already modded/tuned 550+whp

1000 sold... apparently all everyone's first mod
Surprisingly this was my first mod.

The car definitely needed the change of tone and atleast from butt dyno there was a difference in low down torque though the car had much to spare as is.
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      06-02-2018, 09:25 PM   #101
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Quote:
Originally Posted by SanchoDivine View Post
Honestly, I find it hard to believe that the secondary cats after the turbo don't affect the exhaust before the turbo. This is essentially claiming that going with a catless midpipe and using catted downpipes that have the same rating as the OEM secondary cats will enable the exact same gains possible with completely catless exhaust without higher risk to the engine.

I'm no expert but it would seem logical that catless downpipe benefits would be limited to what follows. Why would anyone go catless other than to make the car louder?
I called it! It just doesn't make sense to assume the catted midpipes don't limit the benefits of catless downpipes. If going with downpipes, especially if tuning, people should address the secondary cats in the midpipes by either gutting them or otherwise replacing them with some other solution.
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      06-02-2018, 09:29 PM   #102
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Having gone through 7 different exhaust systems, Iím back to stock for now. And Iím looking forward to trying out Remus midpipe only with stock muffler and BMS CanFlap. Will report back with my impression.
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      06-03-2018, 11:11 AM   #103
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I'm thinking about AA midpipe myself. But was waiting for something to happen in this thread to see the actual gains and make a final decision, but apparently it will not happen.

Last edited by AMOR; 06-05-2018 at 03:34 PM..
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      06-03-2018, 02:56 PM   #104
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I'm thinking about AA midpipe myself. But was waiting for something to happen in this thread to see the actual gains and make a final decision, but apparently it will not happen.

I have a stock ZCP F80 2018. I'm about to do the first 1200 mile service and will be putting car on the dyno shortly after to have a stock reference point before any modding. If guys from AA are wiling to offer a good discount on their midpipe, I can do another dyno right after the midpipe installation and post results here.
i think there are some midpipes from stock to stock + AA midpipe around, what i cant find is before and after power for f8x cars already making 500-600whp+
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      06-26-2018, 03:43 PM   #105
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Bump for an update on the before and after dyno results.
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      06-26-2018, 07:56 PM   #106
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I've got a 2015 F82 with 9000miles, just put on bm3 stage 1 and afe Pro5R drop in filters. I live 30minutes away from AA and would be willing to participate if I can catch a great price on the mid-pipe.

Great community here, love this place!
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      06-26-2018, 08:14 PM   #107
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I did before and after dynos when I got my AA midpipe installed a couple of weeks ago at Auto Talent. It does change the sound, but didn’t make any material difference in power. Maybe two or three. I’m at work so I can’t post them at the moment.

I’m not saying don’t get one. I like the new sound. I just wouldn’t expect a material gain in power.
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      06-26-2018, 08:19 PM   #108
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I should add, however, that I donít have DPs so maybe my results are not of interest.
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      06-26-2018, 10:06 PM   #109
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Quote:
Originally Posted by CigarPundit View Post
I did before and after dynos when I got my AA midpipe installed a couple of weeks ago at Auto Talent. It does change the sound, but didnít make any material difference in power. Maybe two or three. Iím at work so I canít post them at the moment.

Iím not saying donít get one. I like the new sound. I just wouldnít expect a material gain in power.
Please post the dyno graph when you get a chance.

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      06-27-2018, 12:57 AM   #110
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Originally Posted by nars3000 View Post
Please post the dyno graph when you get a chance.

The first dyno is bone stock.

The second is the baseline against the ESS tune.

The third is Baseline + ESS + full AA exhaust (mid pipe and axle back, v1).

All taken on the same Dynapack machine at Auto Talent in similar conditions. The car did better on the Dynojet at EAS, but I don't have a baseline vs. exhaust on the Dynojet.
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