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      10-16-2012, 09:01 AM   #23
bdaddylo
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I disagree. I added Maddads and sound increase was awesome. Adding Remus muffler a few months later got rid of the drone though.
I shouldn't have generalized. With all fairness, Remus has to be the quietest or one of the quietest aftermarket exhausts. Their design targets a particular tone and not a volume increase. I was leaning towards the Remus, but had concerns it wouldn't be loud enough for me.

The increase in sound from my Berk midpipe swap was most noticeable at the lower rpm range due to the stock rear section. The Dinan is at least twice as loud across the entire rpm range. Throttle response has improved beyond what I was expecting and there seems to be a decrease in turbo lag. Search for the Chinese exhaust issue thread to view how restrictive the stock exhaust internals are.

I'm not here to promote Dinan as I feel any quality high performance exhaust would net the same results, but I do have to give kudos to Dinan for controlling the drone.

My biggest gripe with the stock exhaust is it is too quiet in the mid to upper rpm range and you can't hear it on the track. I've received numerous negative comments at the track for how quiet my 1M was. How much better will the Dinan perform at the track? I hope to find out on Saturday.
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      10-16-2012, 03:45 PM   #24
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Quote:
Originally Posted by bdaddylo View Post
I shouldn't have generalized. With all fairness, Remus has to be the quietest or one of the quietest aftermarket exhausts. Their design targets a particular tone and not a volume increase. I was leaning towards the Remus, but had concerns it wouldn't be loud enough for me.
Agree... the MadDads added a lot of noise with the stock muffler. The Remus addition added a sportier exotic tone, esp at the +4k RPM range. The combo is just the noise I wanted, as deep and burbly, without sounding racy like the Akras.

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      10-16-2012, 04:42 PM   #25
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^^^That actually sounds quite good. How is the performance will all of your mods?
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      10-16-2012, 04:50 PM   #26
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^^^That actually sounds quite good. How is the performance will all of your mods?
Dyno (on Dyno Dynamics) with just exhaust mods was 247 rwkW (331 HP). After Evolve-R S1 tune is was 267 rwkW (358 HP).
The exhaust is loud though, and sets off car alarms in parking areas.
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      10-16-2012, 10:17 PM   #27
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Stock rear sucks compared to any aftermarket no matter what midpipes you're running. I believe the stock rear is more restrictive than the stock midpipes.
Not from my experience. The midpipes (MadDad) on both the 135i I had prior, and the 1///M added a lot more power (10whp/8wtq), than the rear cans (MadDad in the 135i case, Akra Valves open in the 1///M case, both of which were between 2-4rwhp, in fact the manufacturers state that).

The stock midpipes are definitely more of a bottleneck than the rear can, relatively speaking.

PS: perhaps that also explains why the N55 engine is rated at the same HP as the N54 as the loss of one turbo is partially offset by a frier flowing midpipe.
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      10-19-2012, 08:29 PM   #28
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That's a Dinan product?? That's messed up...
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      10-19-2012, 08:30 PM   #29
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Someone mentioned to me that they spoke with a VP at Dinan and they said that if they would have included a connecting pipe then it would have added another $1,000 to the exhaust price which they decided not to.
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      10-19-2012, 10:17 PM   #30
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$1000 for a connecting pipe??
Somebody must be crazy! Completely out of proportion!
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      10-19-2012, 10:34 PM   #31
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$1000 for a connecting pipe??
Somebody must be crazy! Completely out of proportion!
Actually, quite Dinan I would say!
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