[PiZauL]

Originally Posted by IancoleTX

Huge.

That's what she said.


Can't wait to hear a sound clip and see a dyno!

[Wake27]

So what's the deal with the possibility of not enough back pressure? This is for all cars? Or only 335's or what?

[IancoleTX]

Originally Posted by Wake27

So what's the deal with the possibility of not enough back pressure? This is for all cars? Or only 335's or what?

The next person to mention lack of backpressure is getting slapped. This would work for any 3 series.

[Mirz_E90]

Originally Posted by IancoleTX

The next person to mention lack of backpressure is getting slapped. This would work for any 3 series.

lack of back-pressure is key to completing the "deuce"

[DimSum]

Originally Posted by Craven 328

Aha! nice digging

im expecting to be on the same path, more would be great but realistically 15whp and almost 10tq is HUGE for under 500$ in our cars

Ya'boy Craven, knows what hes doing.

15WHP for 500$ is a no-brainer.

To get the figures I used the OEM exhaust as if you don't use the backpressure from that system you won't get that high gains. (which is why a supersprint system produces no/near nothing gains on a 330i)

[panpon]

hey guys, today i take my car to local workshop, first i asked them to cut off the cat on the header but they said they can't do it well, they said it's better to make a new one without the cat. so i said yes, do it. so they cost me around 5 million rupiah (around $500) and my car will stay there for a few days
i hope there's a gain

[Lagger1]

How many cats are on our cars? 3? 2 on pre-cats on the headers & 1 on the main?

Im seriously looking at these. I bought a similar part for my maxima ages ago & was the biggest power gain ever for that car. It deleted a pre-cat & still passed smog. Just drive that sucker around for an hour before you test

[Gavin@MMW]

Originally Posted by Lagger1

How many cats are on our cars? 3? 2 on pre-cats on the headers & 1 on the main?

Im seriously looking at these. I bought a similar part for my maxima ages ago & was the biggest power gain ever for that car. It deleted a pre-cat & still passed smog. Just drive that sucker around for an hour before you test

We have 4 lol, the headers drop out the 2 main ones.

[IB6UB9ok]

Hey Dim Sum,

So you're saying with these headers I'll gain more with my stock exhaust system than with my Performance Exhaust? It'll be a shame to get rid of my PE after only 1 week :-)

I think the only way we're gonna find out is to slap a set on and get it dynoed. I'll be getting a baseline dyno next week with this current setup: 330i 6spd manual, PBX, AFE Stage 2 intake, BMW Performance Exhaust.

I'll also be getting some 1/4 mile times on the 25th at the Cayuga dragstrip.

I'll post my results (dyno & 1/4 mile time slips) once they're done.

Originally Posted by DimSum

Ya'boy Craven, knows what hes doing.

15WHP for 500$ is a no-brainer.

To get the figures I used the OEM exhaust as if you don't use the backpressure from that system you won't get that high gains. (which is why a supersprint system produces no/near nothing gains on a 330i)

[IancoleTX]

You do realize that headers are different than exhaust right?

Just making sure..

Originally Posted by IB6UB9ok

Hey Dim Sum,

So you're saying with these headers I'll gain more with my stock exhaust system than with my Performance Exhaust? It'll be a shame to get rid of my PE after only 1 week :-)

I think the only way we're gonna find out is to slap a set on and get it dynoed. I'll be getting a baseline dyno next week with this current setup: 330i 6spd manual, PBX, AFE Stage 2 intake, BMW Performance Exhaust.

I'll also be getting some 1/4 mile times on the 25th at the Cayuga dragstrip.

I'll post my results (dyno & 1/4 mile time slips) once they're done.

[Gavin@MMW]

Originally Posted by IancoleTX

You do realize that headers are different than exhaust right?

Just making sure..

What hes referring to is:

DimSum had his stock muffler on when he deleted the main cats.

IB6 has a BMW performance exhaust which flows more then a stock muffler, so he is concerned about back pressure between the 2 mufflers to maximize gains.

I have a Muffler delete so we will see what happens without a muffler lol

[IancoleTX]

Originally Posted by Craven 328

What hes referring to is:

DimSum had his stock muffler on when he deleted the main cats.

IB6 has a BMW performance exhaust which flows more then a stock muffler, so he is concerned about back pressure between the 2 mufflers to maximize gains.

I have a Muffler delete so we will see what happens without a muffler lol

Ohh I misread his post. My bad. I am running MD also and will be hard pressed to get rid of it!

[GreenPlease]

Sweet headers

[DimSum]

Originally Posted by IB6UB9ok

Hey Dim Sum,

So you're saying with these headers I'll gain more with my stock exhaust system than with my Performance Exhaust? It'll be a shame to get rid of my PE after only 1 week :-)

I think the only way we're gonna find out is to slap a set on and get it dynoed. I'll be getting a baseline dyno next week with this current setup: 330i 6spd manual, PBX, AFE Stage 2 intake, BMW Performance Exhaust.

I'll also be getting some 1/4 mile times on the 25th at the Cayuga dragstrip.

I'll post my results (dyno & 1/4 mile time slips) once they're done.

Nah the PE system is good, all they changed is instead of a soild pipe inside of the muffler they added a mesh on one of the pipes inside to create the sound. Also changed up a few minor things and welded on the BMW Performance Badge and some nice tips! The PE system is very close to the OEM muffler that comes factory on the 330i.

[IB6UB9ok]

I like it a lot...especially the burbling/poping sound it makes.

What's also good about this setup is that they remove the resonator and in place of that a straight pipe.

Originally Posted by DimSum

Nah the PE system is good, all they changed is instead of a soild pipe inside of the muffler they added a mesh on one of the pipes inside to create the sound. Also changed up a few minor things and welded on the BMW Performance Badge and some nice tips! The PE system is very close to the OEM muffler that comes factory on the 330i.

[IancoleTX]

ahhhh i am itchy for dynos and write up

[IB6UB9ok]

Thanks Craven.

What's the leadtime on the headers and O2 sims? Are they made to order after payment or do you have a few finished sets lying around?

As I said in my previous post, I'll be attending a 1/4 nite at one of the tracks here and getting a baseline dyno next week...so, I guess the earliest I'll be placing my order will be near the end of the month.

Has anyone north of the border ordered a set yet?

Originally Posted by Craven 328

What hes referring to is:

DimSum had his stock muffler on when he deleted the main cats.

IB6 has a BMW performance exhaust which flows more then a stock muffler, so he is concerned about back pressure between the 2 mufflers to maximize gains.

I have a Muffler delete so we will see what happens without a muffler lol

[wareagle900]

I stand corrected. I shall go put my foot in my mouth now.

[Wake27]

Originally Posted by DimSum

Ya'boy Craven, knows what hes doing.

15WHP for 500$ is a no-brainer.

To get the figures I used the OEM exhaust as if you don't use the backpressure from that system you won't get that high gains. (which is why a supersprint system produces no/near nothing gains on a 330i)

Sorry man, I'm still lost. These will not produce gains on a 330i?

[DimSum]

Originally Posted by Wake27

Sorry man, I'm still lost. These will not produce gains on a 330i?

They will as long as you are using the OEM setup, but I think the PE system will also show gains.
The full supersprint system for the 330i showed no difference on the dyno, due to the fact that it was too much of a free-flowing design.
Hence why it takes so much skill and research to design a good exhaust for naturally aspirated engines.

That's why in F1 racing the exhaust is VERY crucial. If it comes loose the F1 car becomes significantly slower.

[e90pilot]

I'll bet the SS system will work great with new cams optimized for 0 backpressure and a new engine map of course.

[IancoleTX]

Originally Posted by DimSum

They will as long as you are using the OEM setup, but I think the PE system will also show gains.
The full supersprint system for the 330i showed no difference on the dyno, due to the fact that it was too much of a free-flowing design.
Hence why it takes so much skill and research to design a good exhaust for naturally aspirated engines.

That's why in F1 racing the exhaust is VERY crucial. If it comes loose the F1 car becomes significantly slower.

Does the supersprint setup include headers or was it just cat-back?