W205 C400 C450 C43 Downpipe kit
04-04-2018, 05:16 PM
#29
Super Member
Lol Shardul, this is a bunch of BS
There is no science behind downpipes. The only modification to the ECU for catless is to remove the sensor.
Your downpipes aren’t any different than every other downpipes, it’s a hollow pipe.
Your downpipes on a car running 15psi and the same car without your downpipes running 15psi - the one without will make more power.
In your theory adding more boost, same logic applies. 20psi with no DP will make more power than with. It’s apparently related to back pressure with our platform.
Prove your BS claims or stop selling your junk here.
There is no science behind downpipes. The only modification to the ECU for catless is to remove the sensor.
Your downpipes aren’t any different than every other downpipes, it’s a hollow pipe.
Your downpipes on a car running 15psi and the same car without your downpipes running 15psi - the one without will make more power.
In your theory adding more boost, same logic applies. 20psi with no DP will make more power than with. It’s apparently related to back pressure with our platform.
Prove your BS claims or stop selling your junk here.
04-04-2018, 05:36 PM
#30
MBWorld Fanatic!
Lol Shardul, this is a bunch of BS
There is no science behind downpipes. The only modification to the ECU for catless is to remove the sensor.
Your downpipes aren’t any different than every other downpipes, it’s a hollow pipe.
Your downpipes on a car running 15psi and the same car without your downpipes running 15psi - the one without will make more power.
In your theory adding more boost, same logic applies. 20psi with no DP will make more power than with. It’s apparently related to back pressure with our platform.
Prove your BS claims or stop selling your junk here.
There is no science behind downpipes. The only modification to the ECU for catless is to remove the sensor.
Your downpipes aren’t any different than every other downpipes, it’s a hollow pipe.
Your downpipes on a car running 15psi and the same car without your downpipes running 15psi - the one without will make more power.
In your theory adding more boost, same logic applies. 20psi with no DP will make more power than with. It’s apparently related to back pressure with our platform.
Prove your BS claims or stop selling your junk here.
04-04-2018, 05:39 PM
#31
Super Member
Not trying to get in the middle of any of Shardul's claims - I don't disagree that his pipes are likely to be any different/better/worse than say Weistecs. What I don't understand is how any turbo application could be hindered by higher exhaust velocity? Two identical cars one with catless DPs vs stock, my money is on the catless DP car every time, even if it is minimal. Less restriction = faster spool. What am I missing?
Eurocharged Canada has tested it on several cars. I’ve personally sent back downpipes for this reason. Put your money down, please
04-04-2018, 05:39 PM
#32
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2003 W211 E55, 2003 W220 S600
Not trying to get in the middle of any of Shardul's claims - I don't disagree that his pipes are likely to be any different/better/worse than say Weistecs. What I don't understand is how any turbo application could be hindered by higher exhaust velocity? Two identical cars one with catless DPs vs stock, my money is on the catless DP car every time, even if it is minimal. Less restriction = faster spool. What am I missing?
Now you know why I deal with most people via PM. Some members get too excited and get hostile lol
04-04-2018, 05:41 PM
#33
Super Member
04-04-2018, 10:35 PM
#34
Gotta agree here. If you want to sell the **** out of these downpipes. There needs to be some proof not just some graph that doesn’t show a before and after
plus how do you convert those numbers to rwhp/to US
plus how do you convert those numbers to rwhp/to US
04-05-2018, 03:34 AM
#36
MBWorld Fanatic!
Can I just buy one downpipe? I think having two is overkill..maybe I can just buy one for half the price so I don’t lose too much power?
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Lazz83 (04-05-2018)
04-05-2018, 09:04 AM
#39
MBWorld Fanatic!
I'm being a dick about this because I genuinely want to know so things progress for this platform. There's plenty of bashing company XYZ to go around, but let's at least be constructive about it.
04-05-2018, 09:44 AM
#40
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2017 AMG C43, AWE Touring, BMC Air Filters- 2015 BMW X3 3.5i (JB1 Equipped)
On the C43 Facebook page a guy from somewhere in Asia put downpipes on his C43 and lost power and his 0-60 times where a lot slower than when he had his catted down pipes on? Someone said he needed a tune to boost the power with the new downpipes but I am not so sure. Back pressure helps torque numbers...
It comes down to the efficiency of the factory stock downpipes and from what I have been told the Stock ones on the C43 are pretty damn efficient. The data shows that the 1/4mi Catless DP times are not much better than stock either and I was told by a tuner that the best you can hope for in HP increase is 10hp at the wheel. I suppose if you upgraded the turbos like Renntech does then catless downpipes would make a difference, but not with stock turbos.
I would not spend $1k plus for 10hp- better off with a 60hp shot of nitrous for a quarter of that price.
It comes down to the efficiency of the factory stock downpipes and from what I have been told the Stock ones on the C43 are pretty damn efficient. The data shows that the 1/4mi Catless DP times are not much better than stock either and I was told by a tuner that the best you can hope for in HP increase is 10hp at the wheel. I suppose if you upgraded the turbos like Renntech does then catless downpipes would make a difference, but not with stock turbos.
I would not spend $1k plus for 10hp- better off with a 60hp shot of nitrous for a quarter of that price.
Last edited by Lazz83; 04-05-2018 at 09:48 AM.
04-05-2018, 10:43 AM
#41
Super Member
You saying "something related to back pressure" is just worthless as selling these pipes without posting any objective, comparative data. Again, I'm not advocating for or against this guy and what he's selling, but hearsay isn't good enough. If you're gonna call the dude out, at least have the evidence to back it up. Even a post to reference is better than your "nuh uh" comments.
I'm being a dick about this because I genuinely want to know so things progress for this platform. There's plenty of bashing company XYZ to go around, but let's at least be constructive about it.
I'm being a dick about this because I genuinely want to know so things progress for this platform. There's plenty of bashing company XYZ to go around, but let's at least be constructive about it.
From what I can see, you don't buy anything, you just post, so what's the point of proving anything to you?
04-05-2018, 11:18 AM
#42
MBWorld Fanatic!
There have been plenty of dyno's and data shared on the W205 C43/C450 FB group that identify there is power loss with downpipes on cars running the same boost as without downpipes.
From what I can see, you don't buy anything, you just post, so what's the point of proving anything to you?
From what I can see, you don't buy anything, you just post, so what's the point of proving anything to you?
JB1 is ordered. Moreover, I'm more than willing to buy anything with proven gains. You're right, you have nothing to personally prove to me...but I'm asking you to. You're clever enough to know my activities here....a FB group is news to me - would be great if you could share with the masses. Should be no problem for you 
04-05-2018, 11:54 AM
#43
Super Member
JB1 is ordered. Moreover, I'm more than willing to buy anything with proven gains. You're right, you have nothing to personally prove to me...but I'm asking you to. You're clever enough to know my activities here....a FB group is news to me - would be great if you could share with the masses. Should be no problem for you I'm not using hearsay as evidence - it's been provided with dynographs by Eurocharged Canada over a several car sample.
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04-05-2018, 12:28 PM
#44
MBWorld Fanatic!
Thanks for sharing. Just striving for the facts and resources since swapping in DP's and seeing flat/negative gains is not the norm for forced induction. Wasn't aiming to get in to a pissing match with you. I consume scientific publications all day...methodology, process and understanding behind repeatable results are $$$$ to me. This (MBWorld) being the defacto hub of information for the platform, your comments are the first I've seen about not gaining noticeable power from DP's. Just looking for the data to back it up.
04-05-2018, 12:32 PM
#45
Super Member
Thanks for sharing. Just striving for the facts and resources since swapping in DP's and seeing flat/negative gains is not the norm for forced induction. Wasn't aiming to get in to a pissing match with you. I consume scientific publications all day...methodology, process and understanding behind repeatable results are $$$$ to me. This (MBWorld) being the defacto hub of information for the platform, your comments are the first I've seen about not gaining noticeable power from DP's. Just looking for the data to back it up.
04-05-2018, 12:41 PM
#46
Super Member
Thanks for sharing. Just striving for the facts and resources since swapping in DP's and seeing flat/negative gains is not the norm for forced induction. Wasn't aiming to get in to a pissing match with you. I consume scientific publications all day...methodology, process and understanding behind repeatable results are $$$$ to me. This (MBWorld) being the defacto hub of information for the platform, your comments are the first I've seen about not gaining noticeable power from DP's. Just looking for the data to back it up.
Originally Posted by Vlad from Eurocharged Canada
So this testing was done back in August 2017. This is on our old V2 software. Orange graph results are on a stock 2017 c43. Then we installed catless Downpipes and got the red results. Loss of hp/tq throughout the whole power-band..
Last edited by threefirs; 04-05-2018 at 12:56 PM.
04-12-2018, 07:14 PM
#47
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Stage 2 W205 c300
On the C43 Facebook page a guy from somewhere in Asia put downpipes on his C43 and lost power and his 0-60 times where a lot slower than when he had his catted down pipes on? Someone said he needed a tune to boost the power with the new downpipes but I am not so sure. Back pressure helps torque numbers...
It comes down to the efficiency of the factory stock downpipes and from what I have been told the Stock ones on the C43 are pretty damn efficient. The data shows that the 1/4mi Catless DP times are not much better than stock either and I was told by a tuner that the best you can hope for in HP increase is 10hp at the wheel. I suppose if you upgraded the turbos like Renntech does then catless downpipes would make a difference, but not with stock turbos.
I would not spend $1k plus for 10hp- better off with a 60hp shot of nitrous for a quarter of that price.
It comes down to the efficiency of the factory stock downpipes and from what I have been told the Stock ones on the C43 are pretty damn efficient. The data shows that the 1/4mi Catless DP times are not much better than stock either and I was told by a tuner that the best you can hope for in HP increase is 10hp at the wheel. I suppose if you upgraded the turbos like Renntech does then catless downpipes would make a difference, but not with stock turbos.
I would not spend $1k plus for 10hp- better off with a 60hp shot of nitrous for a quarter of that price.
When I installed my Armytrix downpipe on my C300, I noticed an immediate & noticable drop in power. I never did any before/ after dyno runs, but it was absolutely noticeable. (It felt like the car had ‘the wind knocked out of it’ if that makes any sense.) HOWEVER, after I got my car tuned, (a week or so later,) it felt really really good. It felt like the spool was significantly faster and smoother.
My theory is that the turbo just spools at a different rate than the tune expects it to, (or than its’ engineers expected to when building the tune) and it starts running less efficiently due to different variables like boost targets etc. basically: it felt like the turbo was spooled faster than usual, but was ‘maxing out’ (for a specific rpm or throttle position) too soon.
The way I see it, theoretically one could get a ‘stage 2’ tune with stock cats and, theoretically, make similar power or torque as a catless car, but it would be at different points in the powerband because the turbo/s spool at a different rate.
¯\_(ツ)_/¯
just my theory(from my personal experience)
Last edited by AndyMel; 04-12-2018 at 07:22 PM.
07-19-2018, 04:35 PM
#49
Super Member
Just want to bump your thread since there has been progress with this platform and downpipes are now proving some results.
