991.2 exhaust
#46
03-30-2016 | 04:19 AM
Banned
Joined: Jun 2014
Posts: 116
Rep Power: 0
As I said before. Akra do their job letting You know it could happen, what I said was, In my own experience, it is not very likely to happen with cars with high flow cats. I do not ignore it, and I dont really mind about a CEL beyond the annoying light On the dash and the fact You could be ignoring another error for having a Cel permanently.
How do you think the ex Moto GP pace Car BMW 1M solved this? Or the BMW M5 or BMW M6? They usted Akrapovic Evolution systems.
Or, did You see any CEL on a stock GT2? Guess who designed that and guess about the main Focus during that development.
How do you think the ex Moto GP pace Car BMW 1M solved this? Or the BMW M5 or BMW M6? They usted Akrapovic Evolution systems.
Or, did You see any CEL on a stock GT2? Guess who designed that and guess about the main Focus during that development.
Last edited by BlocktGrills; 03-30-2016 at 04:22 AM.
#47
03-30-2016 | 04:31 AM
Registered User
Joined: Feb 2016
Posts: 107
From: Charleston
Rep Power: 31
Yes so I'm told which why I respect the advises from the trained tech working on our turbo cars including many "modded" for track with non genuine parts. So they get to see which part is which and what part is not so great as some claiming here just to sell. Techs like always good outcomes for car and customer so warranty problems avoid where possible. I am good customer so they will always give me good explanations and advises even if part is not genuine brand.
Thanks for your concerns gmd2003 but no need for lengthy explanations already fully explained to me by techs about CEL and all causes. I DO understand. High flow cat is one good thing to have on car sure. BUT no CEL light coming up on dash is another good thing you can also enjoy. High flow cat with no CEL is best solution end of story. And it is available so why sacrifice for one which is problematic? Not everyone has disrespect for environment and run without cat. Too much pollutions already in atmosphere YOU and I breathe! Now, if some here cant make high flow cat reliable to not cause CEL it is not my problem!! They should do proper R and D to design properly and not seek to just make excuse or BS sale story and avoid costly R and D. Why not improve products to make them work properly for car and buyer they sell it for eh? Maybe hurt profit? Or maybe not enough profit to share with Mr 10% sale agent? Hmm more likely scenario I think!!
Btw dealer say it is BS that OEM cat will make cell after 15 20K mileage....say maybe if there is wrong aftermarket tuning giving too much fuel then yes. And why turn off light anyway? That is just covering up problem. No need to cover up problem when 100 hi flow cat with no CEL light warning ever is available.. Some just need to do their "searching" properly and they will find the facts on it.
Thanks for your concerns gmd2003 but no need for lengthy explanations already fully explained to me by techs about CEL and all causes. I DO understand. High flow cat is one good thing to have on car sure. BUT no CEL light coming up on dash is another good thing you can also enjoy. High flow cat with no CEL is best solution end of story. And it is available so why sacrifice for one which is problematic? Not everyone has disrespect for environment and run without cat. Too much pollutions already in atmosphere YOU and I breathe! Now, if some here cant make high flow cat reliable to not cause CEL it is not my problem!! They should do proper R and D to design properly and not seek to just make excuse or BS sale story and avoid costly R and D. Why not improve products to make them work properly for car and buyer they sell it for eh? Maybe hurt profit? Or maybe not enough profit to share with Mr 10% sale agent? Hmm more likely scenario I think!!
Btw dealer say it is BS that OEM cat will make cell after 15 20K mileage....say maybe if there is wrong aftermarket tuning giving too much fuel then yes. And why turn off light anyway? That is just covering up problem. No need to cover up problem when 100 hi flow cat with no CEL light warning ever is available.. Some just need to do their "searching" properly and they will find the facts on it.
#48
03-30-2016 | 04:54 AM
Banned
Joined: Jun 2014
Posts: 116
Rep Power: 0
I never said an OEM cat would give a CEL in 15k ,I said ANY Aftermarket High flow cat would . There is no design difference between catylzers , it depends on. Cell count and size that's it lol . If you want no increase in emissions you have to stay stock end of story . So yes you and your tech apparently do have a lack of knowledge if you think Europipe magically doesn't increase emissions .
Last edited by BlocktGrills; 03-30-2016 at 05:01 AM.
#49
03-30-2016 | 04:56 AM
Registered User
Joined: Mar 2016
Posts: 64
Rep Power: 0
I will not dispute you over akra "oem" cat pipe for GT2. It was made FOR Porsche which is why it works with no CEL. Tech already expliained this btw. Making for aftermarket is always different than OEM with less R and D on that part to sell cheaper. Techs say the EP only one they see so far who really care to do right R and D for customer to make pipe reliable like rest of car. If your dash show CEL how do you know if is cat? Hmm? It could be something more serious and then you keep driving thinking it just cat doing CEL so not to worry but it then cause damage to some other part of engine as it is something else to what you think. Best to have NO CEL happen at any time and if it does show on dash then pay serious attention and stop engine until you know what it is really problems. Porsche is about reliability not putting crap pipe on that leave you wondering if it is this or that. Maybe you are happy with that situation and that is OK for you and many here, but not me thanks. I live long way from dealer.
Did you even read about the CEL for cats hidding other posibles issues on my previous post? That is the only real issue with a CEL for emissions On 99% of cars.
Seems your lack of reading comprehension could also be confusing you about what your "tech" says.
#50
03-30-2016 | 04:58 AM
Registered User
Joined: Mar 2016
Posts: 64
Rep Power: 0
Sorry. Tech did told the aftermarket cats throw cells and disintegrating early from unsuited design but with such childish neg rep happening did not want to remind the sad "fans" of any more reality as some are a clearly not coping well. With Europipe I will ask techs some more and come back but why you think it make more pollution?
Go buy yourself a BMW i3
#51
03-30-2016 | 05:07 AM
Banned
Joined: Jun 2014
Posts: 116
Rep Power: 0
Yes mainly crappy cats but also other problems they say..which you allude to before on such and such brands....dare i say it lol!
No need a BMW thanks.... Have you own a I3? Is it no good?
No need a BMW thanks.... Have you own a I3? Is it no good?
#52
03-30-2016 | 05:11 AM
Banned
Joined: Jun 2014
Posts: 116
Rep Power: 0
Your "tech" si getting ahead of his knowledge.
Did you even read about the CEL for cats hidding other posibles issues on my previous post? That is the only real issue with a CEL for emissions On 99% of cars.
Seems your lack of reading comprehension could also be confusing you about what your "tech" says.
Did you even read about the CEL for cats hidding other posibles issues on my previous post? That is the only real issue with a CEL for emissions On 99% of cars.
Seems your lack of reading comprehension could also be confusing you about what your "tech" says.
And yes tech did explaining other CEL causes such as fuel, bad aftermarket tune, and cat failing from bad design so on etc.. No need to me go to deep into details..
#53
03-30-2016 | 05:18 AM
Registered User
Joined: Feb 2016
Posts: 107
From: Charleston
Rep Power: 31
Sorry. Tech did told the aftermarket cats throw cells and disintegrating early from unsuited design but with such childish neg rep happening did not want to remind the sad "fans" of any more reality as some are a clearly not coping well. With Europipe I will ask techs some more and come back but why you think it make more pollution? Btw the tech is actually Porsche and very well regarded for having high knowledge on.....so should know. Or you think not? He seem to know a lot about pipes and cats as is good explaining to me differences they find and problems they have seen.
#54
03-30-2016 | 05:31 AM
Registered User
Joined: Mar 2016
Posts: 64
Rep Power: 0
I'd say you can already decide yourself about your exhaust.
#55
03-30-2016 | 05:33 AM
Banned
Joined: Jun 2014
Posts: 116
Rep Power: 0
That's why the brand of catylzer used is the most important thing , the companies that use HJS Motorsport catylzers will not fall apart ( they are the best functioning and highest flowing aftermarket catylzer ) used in many race cars . They are also the most expensive option . They give really high flow but still keep emissions reasonable . Europipe uses a really large 100 cell catylzer ( not sure brand ) which is why it doesn't cause a CEL initially , but if you go from an 600 cell per inch ( stock ) to a 100 cell per inch ( Europipe)of the same size which do you think will filter out more emissions? If your concern is the environment you need to stay stock and probably shouldn't get a sports car lol .
I just google Europipe website now. It has a picture of cat showing name ""emmitec" so I guess that is brand? Not HJS.
Here is copy paste of info about it from Europipe website or follow link to read the infos on it as copy pasted below. http://www.europipe.be/exhausts.html I like to get your opinion on it. It say it makes air cleaner?
The foils of our ø153mm sport cats are perforated with holes so the exhaust gas flow can enter into the neighbouring channels. Conventional cats have just an axial flow pattern while our cats will flow axial, diagonal and radial. The exhaust gasses spread evenly inside the cat which results in lower backpressure.
The cross section of our ø153mm sport cats is 40% larger than ø130mm cats, 60% larger than ø118mm cats and over 100 % larger than the commonly used ø108mm cats.
These big size 100 cell cats will create less backpressure than higher density cats of the same size. (same diameter + length) Low backpressure on turbocharged engines is beneficial for both the horsepower / torque and the throttle response.
The volume of the sport cat, its total surface area, the amount / content of the precious metal coating and the addition of heat shields are the key factors in having a long lasting trouble-free cat converter.
A large catalyst surface area allows for better exhaust gas conversion efficiency, durability and cleaner air.
We don't offer 200 cell semi-sport cats on our sport exhausts because these are more restrictive than the real 100 cell sport cats.
Our big 100 cell sport cats do not cause emission issues or check engine light problems.
The heatshields around our catalytic convertors allow for quicker heat up during cold start and to prevent them from thermal shocks. The muffler heat shields reflect radiant heat away from the engine timing belts.
Last edited by BlocktGrills; 03-30-2016 at 05:36 AM.
#56
03-30-2016 | 05:41 AM
Banned
Joined: Jun 2014
Posts: 116
Rep Power: 0
Pity Akra not make 991 type muffler and non CEL 100 cat as i like the titanium and like you trust the manufacture quality.
#57
03-30-2016 | 10:52 AM
Former Vendor
Joined: Feb 2010
Posts: 356
From: Belgium
Rep Power: 0
Feel free to contact me with e-mail if you need more info about our 991.2 Turbo sport exhausts, thank you.
#58
03-30-2016 | 10:54 AM
Former Vendor
Joined: Feb 2010
Posts: 356
From: Belgium
Rep Power: 0
I never said an OEM cat would give a CEL in 15k ,I said ANY Aftermarket High flow cat would . There is no design difference between catylzers , it depends on. Cell count and size that's it lol . If you want no increase in emissions you have to stay stock end of story . So yes you and your tech apparently do have a lack of knowledge if you think Europipe magically doesn't increase emissions .
There are differences indeed. All these 100 cell race cats are actually made for racecars that run on a racetrack. Those cats all have a low amount of precious metals because the emission results are not that important.
We invest in 100 cell sport cats that have been coated with a very high amount of precious metal. They are vastly superior to any of those Euro 4 grade 200 cell cats commonly used on aftermarket Porsche sport exhausts.
Here are the emission results of our test-bed 997 Turbo with 100 cell Europipe cats after 64.000 km of use.
I also measured the emissions without cats so you can compare stock emissions with Europipe 100 cell and catless.
#59
03-30-2016 | 11:17 AM
Registered User
Joined: Apr 2008
Posts: 391
From: Portland, Oregon
Rep Power: 86
The extremely low CO implies either a really lean mixture or hot cat. Did you happen to measure Oxides of Nitrogen (NOx)? They tend to skyrocket when you get CO that low, and we can't pass tail-pipe tested emissions here with anything above normal NOx (not to mention the annoying eye burning typically associated with high NOx... its what people usually sense when they think a car isnt using cats.)
I have no problem with ultra-high quality 100-cell cats, I'm just a bit of an old emissions test geek from when we had to try and get souped-up cars passed that were on the line.
For awhile there was a on-dyno "road course" that testers had to do complete with hills and stop signs. You had to know who the testers were that could keep the car out of boost (hydrocarbons).