[TommyK]

http://www.europeancarweb.com/tech/e...yno/index.html


I saw this article way back when and misplaced the link all this time. i think its a great example of how the stock car is already factory optimized. (not saying there isnt some room for improvement. i wouldn't have the parts that i have on my car right now if i didn't see some improvement)

just thought this would help people understand the real gains and costs behind it since a lot of
i understand this is the 330 and the majority of people have the 328 on here, which in theory means there is room for everyone to grow a little (if you consider the 330 being the bench mark)

open for discussion

[DimSum]

Good read... shocked that the SS exhaust system showed a loss in horsepower and torque.

[TommyK]

^ ya sorry bro. i know you just installed that system. ive heard that in real life test situations even the BMW Performance exhaust looses power.

i wonder if they got rid of the res. if that would help at all. And ya SS is the highest quality stuff on the market so im not sure what happened there either.

[faz]

Good page, thanks for sharing.

As far as the loss of power for exhaust, well, it doesn't show to be that much anyway. This is a case where the mod should be justified by the sound/feeling improvement over the (negligible) hp loss.

[Gavin@MMW]

if your paying 2000$ for an exhaust, and it losses power? that would piss me off.

[Alexander]

Originally Posted by faz

Good page, thanks for sharing.

As far as the loss of power for exhaust, well, it doesn't show to be that much anyway. This is a case where the mod should be justified by the sound/feeling improvement over the (negligible) hp loss.

My butt dyno told me that I lost HP/ TQ after doing muffler/ res delete.

I figured this would be the case. Good read though!

Counter point: The factory exhaust system is extremely heavy, I saved about 40 lbs with my set up. So... I'm not sure.

[DimSum]

Originally Posted by TommyK

^ ya sorry bro. i know you just installed that system. ive heard that in real life test situations even the BMW Performance exhaust looses power.

i wonder if they got rid of the res. if that would help at all. And ya SS is the highest quality stuff on the market so im not sure what happened there either.

Oh no! I didn't install it, I was going to! Thank god, now I know to stay away from it... It looks REAL nice though! Maybe OEM Performance maybe the best route.

[TommyK]

Originally Posted by DimSum

Oh no! I didn't install it, I was going to! Thank god, now I know to stay away from it... It looks REAL nice though! Maybe OEM Performance maybe the best route.

oh ok. i just saw the thread you posted and thought it was you who did all that work.
ya i have no idea. i honestly dont think it matters if you loos HP and get a great sounding system i think thats all that maters. i have a hard time believing after this that the BMW system will produce gains. it probably will keep is the same as stock probably just less stuffing in the muffler.

[Juan.sidarta]

damn, so when i do my muffler delete it'd lose hp =( I was hoping to make it faster. damn it!

[justakid88]

i thot the afe intake caused hp loss also? i read that in a couple of threads here

[Gavin@MMW]

Originally Posted by Juan.sidarta

damn, so when i do my muffler delete it'd lose hp =( I was hoping to make it faster. damn it!

in the case of a muffler delete, its weight over power.

A Lotus is tiny engined, but a tiny car - so fast.

our cars are fat bastards

[3pnt4maro]

the loss in backpressure creates a more free flowing exhaust with gains mostly being seen in high horsepower cars...but still if the sound can justify it it will obviously help with other mods

[not0riouskid]

I believe the time companies put into making their products < should at least
have an idea why that part is better from factory...

maybe a little more indepth studies of such can produce better performance ?

not the " bigger is better theory " .


+ 1 for supporting mods may help .


good post with the link'd article ...

[Wlew]

this is the exact article I had referred to a few topics ago about exhaust. no one believed me, but I had stated in an article I found but lost that the supersprint lost tq in the low end.

however, I agree. for a good sounding tone...ill sacrifice a few tq. I am gonna woop a ricer's ass anyways. and will never be able to beat a 335... so what the big deal?

on that note, what can our cars be compared to racing/HP and tq wise?

as in 335 kind of competes with the audi s4 and so on...

talking stock here. not with mods on either. just curious to see if anyone has any good racing stories, not so much factory specs.

[AKbmw]

Originally Posted by Wlew

this is the exact article I had referred to a few topics ago about exhaust. no one believed me, but I had stated in an article I found but lost that the supersprint lost tq in the low end.

however, I agree. for a good sounding tone...ill sacrifice a few tq. I am gonna woop a ricer's ass anyways. and will never be able to beat a 335... so what the big deal?

on that note, what can our cars be compared to racing/HP and tq wise?

as in 335 kind of competes with the audi s4 and so on...

talking stock here. not with mods on either. just curious to see if anyone has any good racing stories, not so much factory specs.

when i had my 335 for 3 years, (2007 - 2010) everytime i drove on the streets i would drive with confidence and anybody who wanted to go, i would go with confidence. (please i dont want to hear any haters saying dont race on the streets) now with my 328 im not really sure if i want to race anybody anymore, not saying its slow but it aint no 335, specially with my jb3 and other mods i was up there with some high end cars. it sucks having to think twice about racing a c300 mercedes

but other than that i love my 328 6mt! much fun!

[Juan.sidarta]

Originally Posted by Wlew

this is the exact article I had referred to a few topics ago about exhaust. no one believed me, but I had stated in an article I found but lost that the supersprint lost tq in the low end.

however, I agree. for a good sounding tone...ill sacrifice a few tq. I am gonna woop a ricer's ass anyways. and will never be able to beat a 335... so what the big deal?

on that note, what can our cars be compared to racing/HP and tq wise?

as in 335 kind of competes with the audi s4 and so on...

talking stock here. not with mods on either. just curious to see if anyone has any good racing stories, not so much factory specs.

I raced with an X5M before n freeway 10, near san gabriel otw back from LA. It was nightime but there were several cars. He cut me off first, so I cut him back, and before I knew it, we were racing. He was faster striaght up I think, but I beat him by far, due to 328 coupes smaller and more agile ability. Also I'm good with cutting because that's what we do in Indonesia all the time, due to heavy traffic, and you can run away from cops in indo and have no helicopter chase u too, so that really made my cutting skills improve. Some may call me reckless here, but I think its simply calculated risk and skill. Hahaha, well, I'm not awsome, but relatively good. So there you go, we can beat lots of car faster than our NA/stock

[2M]

Originally Posted by AKbmw

when i had my 335 for 3 years, (2007 - 2010) everytime i drove on the streets i would drive with confidence and anybody who wanted to go, i would go with confidence. (please i dont want to hear any haters saying dont race on the streets) now with my 328 im not really sure if i want to race anybody anymore, not saying its slow but it aint no 335, specially with my jb3 and other mods i was up there with some high end cars. it sucks having to think twice about racing a c300 mercedes

but other than that i love my 328 6mt! much fun!

idk bout c300..but from experience my car is up there with the 350

[Juan.sidarta]

Originally Posted by Alpine3

idk bout c300..but from experience my car is up there with the 350

Lol. Wed own a C300 for sure!

[FrankiE90]

that article is old.
i'm sure 330/325/328 that are broken in run alittle better.

check out IVANX 330.
dyno'd with muffler delete + Gruppe M intake.



and my 328i
base run is with:
BMW peformance + Gruppe M intake
then another run with LET Tune.

http://www.e90post.com/forums/showthread.php?t=271912



i've seen gains on all performance mods add'd to
my NA.

[Martin46]

what is LET TUNE?

thanks

[G35to330i]

Originally Posted by Craven 328

if your paying 2000$ for an exhaust, and it losses power? that would piss me off.

This is why I went with a MD, to see if I liked the sound before dropping big bucks, but this article has definitely stopped me from buying any aftermarket exhaust. No matter how it sounds. I think tonight I'm doing to cut the MD off and return her to stock, but to each their own

[Alexander]

I'm doing 3 dyno runs on Sunday... Check my sig for mods.