M performance back box vs catted vs catless DP

[Fator]

Hi guys, newbie here
I have a 335i F34 and i want specifically two things: good exhaust sound and a chip. So my question is, which one between the M Performance back box, the catted, and the catless downpipe will offer me that aggressive note with the louder vruu pha? I have also the e90 335i that killed the catalytic converter, which made it smell like sulfur on hard acceleration, so i want to know if that smell is what i get with catless DP? Because i dont like that smell. In case of the chip? Race chip ultimate or JB? Performance vs durability?

 

[FerdiBotha]

Hi guys, newbie here
I have a 335i F34 and i want specifically two things: good exhaust sound and a chip. So my question is, which one between the M Performance back box, the catted, and the catless downpipe will offer me that aggressive note with the louder vruu pha? I have also the e90 335i that killed the catalytic converter, which made it smell like sulfur on hard acceleration, so i want to know if that smell is what i get with catless DP? Because i dont like that smell. In case of the chip? Race chip ultimate or JB? Performance vs durability?

I can't comment on the exhaust pipe, but for the chiptuning JB and Racechip cannot be compared.

Most people unfortunately fall for the advertised gains posted by Racechip, yet none of those results have ever been posted nor achieved by any customer.

JB4 is tried, tested and has been proven to work phenomenally for anything from a reliable daily to a hardcore drag racer.

 

[rsgordini]

I agree with the software comment from Ferdi... JB4 is proven both performance and reliability...

Have many friends that run JB4 on their m135 335 m4 135i..

250wkw easy..

As for exhaust question im pretty sure the downpipe (no cat) is probably best for performance and reliability as it puts less heat back up the manifold.. especially on an older car where the cat may already be blocked..

 

[Fator]

Thanks guys,
I have seen lot of post about JB4 maps not working, or no boost..... Is it becouse they fiddle with it? And another thing, 250kw - 225kw = 25kw gain from JB4?

As for Catless Downpipe, can it make that M Performance back box sound? And how bad is the smell? is the smell something noticeable?

Which downpipe can you recommend for better sound, reliability and performance?

 

[FerdiBotha]

Thanks guys,
I have seen lot of post about JB4 maps not working, or no boost..... Is it becouse they fiddle with it? And another thing, 250kw - 225kw = 25kw gain from JB4?

As for Catless Downpipe, can it make that M Performance back box sound? And how bad is the smell? is the smell something noticeable?

Which downpipe can you recommend for better sound, reliability and performance?

Remeber your car doesn't make 225kw on the wheels - probably between 190-200kw or so. With JB4 you wil quite easily see 250kw on the wheels, which will thus be quite a significant increase.

If you start fiddling with the JB4 and maps you will gain a massive amount over stock.

 

[cOlDFuSiOn]

My stock F30 is pushing approx 222kw on the rear wheels, at more than one dyno event it was in this region.

+1 on the JB4 - you will see some good gains. With a few mods you can get some decent performance out of the motor.

Go dyno the car before, it's already getting chilly so the figures might be a bit biased but then you know what you make before and after mods. 300wkw is not unreasonable, chat to some of the Forum sponsors.. Xcede, Rennzsport, etc

As for the exhaust the MPE is great, but you would want a downpipe.

 

[Dees_13]

The M performance back box is great. Really makes a noticable difference. It's a decent increase in sound. Downpipe will be a louder option and a greater performance increase.

If you couple both a downpipe and the M performance box then that's just a winner. Car sounds amazing while cruising and really howls when you go all out. No drone at all

 

[Fator]

Thanks guys,
I have seen lot of post about JB4 maps not working, or no boost..... Is it becouse they fiddle with it? And another thing, 250kw - 225kw = 25kw gain from JB4?

As for Catless Downpipe, can it make that M Performance back box sound? And how bad is the smell? is the smell something noticeable?

Which downpipe can you recommend for better sound, reliability and performance?

Remeber your car doesn't make 225kw on the wheels - probably between 190-200kw or so. With JB4 you wil quite easily see 250kw on the wheels, which will thus be quite a significant increase.

If you start fiddling with the JB4 and maps you will gain a massive amount over stock.

It makes more sense now. I cant say NO to more power, or an increase on my 0-100 km/s.

:ty:

---

My stock F30 is pushing approx 222kw on the rear wheels, at more than one dyno event it was in this region.

+1 on the JB4 - you will see some good gains. With a few mods you can get some decent performance out of the motor.

Go dyno the car before, it's already getting chilly so the figures might be a bit biased but then you know what you make before and after mods. 300wkw is not unreasonable, chat to some of the Forum sponsors.. Xcede, Rennzsport, etc

As for the exhaust the MPE is great, but you would want a downpipe.

With JB4 + Downpipe, can i get 0.5 second less on 0-100 sprint?

 

[Iceman12596]

Thanks guys,
I have seen lot of post about JB4 maps not working, or no boost..... Is it becouse they fiddle with it? And another thing, 250kw - 225kw = 25kw gain from JB4?

As for Catless Downpipe, can it make that M Performance back box sound? And how bad is the smell? is the smell something noticeable?

Which downpipe can you recommend for better sound, reliability and performance?

Remeber your car doesn't make 225kw on the wheels - probably between 190-200kw or so. With JB4 you wil quite easily see 250kw on the wheels, which will thus be quite a significant increase.

If you start fiddling with the JB4 and maps you will gain a massive amount over stock.

It makes more sense now. I cant say NO to more power, or an increase on my 0-100 km/s.

:ty:

---

My stock F30 is pushing approx 222kw on the rear wheels, at more than one dyno event it was in this region.

+1 on the JB4 - you will see some good gains. With a few mods you can get some decent performance out of the motor.

Go dyno the car before, it's already getting chilly so the figures might be a bit biased but then you know what you make before and after mods. 300wkw is not unreasonable, chat to some of the Forum sponsors.. Xcede, Rennzsport, etc

As for the exhaust the MPE is great, but you would want a downpipe.

With JB4 + Downpipe, can i get 0.5 second less on 0-100 sprint?

---

JB4 FTW.

Yes you probably will but also depends on alot of other factors such as weight, weather, tyres etc etc.

I have JB4 on my 335i, and I will never look back.
As for the "stories" of JB4 maps not working, that is exactly what they are....Stories bud.

Remember bullsh*t baffles brains, bud JB4 you can't go wrong.

 

[Fator]

Thanks guys,
I have seen lot of post about JB4 maps not working, or no boost..... Is it becouse they fiddle with it? And another thing, 250kw - 225kw = 25kw gain from JB4?

As for Catless Downpipe, can it make that M Performance back box sound? And how bad is the smell? is the smell something noticeable?

Which downpipe can you recommend for better sound, reliability and performance?

Remeber your car doesn't make 225kw on the wheels - probably between 190-200kw or so. With JB4 you wil quite easily see 250kw on the wheels, which will thus be quite a significant increase.

If you start fiddling with the JB4 and maps you will gain a massive amount over stock.

It makes more sense now. I cant say NO to more power, or an increase on my 0-100 km/s.

:ty:

---

My stock F30 is pushing approx 222kw on the rear wheels, at more than one dyno event it was in this region.

+1 on the JB4 - you will see some good gains. With a few mods you can get some decent performance out of the motor.

Go dyno the car before, it's already getting chilly so the figures might be a bit biased but then you know what you make before and after mods. 300wkw is not unreasonable, chat to some of the Forum sponsors.. Xcede, Rennzsport, etc

As for the exhaust the MPE is great, but you would want a downpipe.

With JB4 + Downpipe, can i get 0.5 second less on 0-100 sprint?

---

JB4 FTW.

Yes you probably will but also depends on alot of other factors such as weight, weather, tyres etc etc.

I have JB4 on my 335i, and I will never look back.
As for the "stories" of JB4 maps not working, that is exactly what they are....Stories bud.

Remember bullsh*t baffles brains, bud JB4 you can't go wrong.

---

Thanks man, much appreciated, i nearly bought racechip ultimate becouse some other dude said it is best for bmw cars as opposed to JB4.

After you guys brings some light to me, i am definitely going with JB4. I will contact the guys u advised me to.

:ty::ty::ty::ty::ty:

 

[Iceman12596]

Thanks guys,
I have seen lot of post about JB4 maps not working, or no boost..... Is it becouse they fiddle with it? And another thing, 250kw - 225kw = 25kw gain from JB4?

As for Catless Downpipe, can it make that M Performance back box sound? And how bad is the smell? is the smell something noticeable?

Which downpipe can you recommend for better sound, reliability and performance?

Remeber your car doesn't make 225kw on the wheels - probably between 190-200kw or so. With JB4 you wil quite easily see 250kw on the wheels, which will thus be quite a significant increase.

If you start fiddling with the JB4 and maps you will gain a massive amount over stock.

It makes more sense now. I cant say NO to more power, or an increase on my 0-100 km/s.

:ty:

---

My stock F30 is pushing approx 222kw on the rear wheels, at more than one dyno event it was in this region.

+1 on the JB4 - you will see some good gains. With a few mods you can get some decent performance out of the motor.

Go dyno the car before, it's already getting chilly so the figures might be a bit biased but then you know what you make before and after mods. 300wkw is not unreasonable, chat to some of the Forum sponsors.. Xcede, Rennzsport, etc

As for the exhaust the MPE is great, but you would want a downpipe.

With JB4 + Downpipe, can i get 0.5 second less on 0-100 sprint?

---

JB4 FTW.

Yes you probably will but also depends on alot of other factors such as weight, weather, tyres etc etc.

I have JB4 on my 335i, and I will never look back.
As for the "stories" of JB4 maps not working, that is exactly what they are....Stories bud.

Remember bullsh*t baffles brains, bud JB4 you can't go wrong.

---

Thanks man, much appreciated, i nearly bought racechip ultimate becouse some other dude said it is best for bmw cars as opposed to JB4.

After you guys brings some light to me, i am definitely going with JB4. I will contact the guys u advised me to.

:ty::ty::ty::ty::ty:

---

Contact Firi from Rennzport

 

[Kenny_G33]

JB4 - No contest.

M-Performance box + cat less downpipe :=):

 

[Fator]

JB4 - No contest.

M-Performance box + cat less downpipe :=):

With the racechip ultimate + M Performance back box, can i get the vru pha sound on the upshift?

BMW 335I GT N55,
Sport zf8 transmission with pedal shifts
Launch control

 

[Kolbe]

JB4 - No contest.

M-Performance box + cat less downpipe :=):

With the racechip ultimate + M Performance back box, can i get the vru pha sound on the upshift?

BMW 335I GT N55,
Sport zf8 transmission with pedal shifts
Launch control

Thought I'd share my experiences with piggy back tunes .... had the Racechip on my E90 330d FL - the diesel pump packed up - swarf in the tank, fuel line etc. Never again!!! Had AC Schnitzer with Supersprint DP in my M135i, very, very good product (281Kw and 555Nm at the wheels with a can of NF Race). Have presently got JB Stage 1 with competition pack exhaust in my F10 M5 - 448Kw and 854 Nm at the wheels (stock was 412Kw and 794Nm). Very strong and smooth. So, after much communication with BMS and research on the JB product I decided on it for my F10 M5 and I can definitely recommend it! JB Stage 1 is from a power point of view similar to JB4 Map 1. Excellent product. PM me if anyone wants more information on the boost settings.

 

[LukeHawk]

I'm running a JB4 as well (granted, on a 320i only) but it's been great. Such a much-needed increase in power. It feels like a completely different car.

Also contemplating a downpipe and Decat, but I'm not 100% sure if it's worth it for me, so I may not

 

[Fator]

JB4 - No contest.

M-Performance box + cat less downpipe :=):

With the racechip ultimate + M Performance back box, can i get the vru pha sound on the upshift?

BMW 335I GT N55,
Sport zf8 transmission with pedal shifts
Launch control

Thought I'd share my experiences with piggy back tunes .... had the Racechip on my E90 330d FL - the diesel pump packed up - swarf in the tank, fuel line etc. Never again!!! Had AC Schnitzer with Supersprint DP in my M135i, very, very good product (281Kw and 555Nm at the wheels with a can of NF Race). Have presently got JB Stage 1 with competition pack exhaust in my F10 M5 - 448Kw and 854 Nm at the wheels (stock was 412Kw and 794Nm). Very strong and smooth. So, after much communication with BMS and research on the JB product I decided on it for my F10 M5 and I can definitely recommend it! JB Stage 1 is from a power point of view similar to JB4 Map 1. Excellent product. PM me if anyone wants more information on the boost settings.

Thank you for sharing the experience. Is the with the JB stage 1 is the acceleration 0-100 noticable?

The racechip salesman promised me between 0.5 to 0.7 improvement on acceleration. Can the JB stage 1 beat this?

 

[Yuben]

:facepalm:
Why is the 0-100 time so critical to you:hammerhead:
Races are not won in 2nd gear...

 

[Fator]

:facepalm:
Why is the 0-100 time so critical to you:hammerhead:
Races are not won in 2nd gear...

Hahahahaha, for me it's two things, the axhaust sound, and acceleration. Simply becouse i dont wana be passed by the golf GTI's, i have N54 335, so i went for the 335 GT to get some extra space for the baby but yet expected a bit of acceleration compared to my N54, but it is just not enough. Robot to robot is as crucial raise:

 

[Yuben]

But robot to robot is also not just to 100km/h.

In the real world, you need to look at least 0-160.

Races are not won according to 0-100 times as per road tests...

 

[Fator]

But robot to robot is also not just to 100km/h.

In the real world, you need to look at least 0-160.

Races are not won according to 0-100 times as per road tests...

What contributes to robot to robot race? I thought puting car on sport plus with the transmission on sport side, activate lauch control, and flat accelerator is what is needed. When i pedal shift sometimes i shift early or too late after the car cuts power so i now rely on the car computer to do magic.