06-01-2013, 02:02 AM | #1 |
Private First Class
29
Rep 116
Posts |
HFC Downpipe questions
I'm thinking of getting the Challenge HFC Downpipe.
Is anyone running this with MPPK? Do you have any issues with CEL's Thanks |
06-01-2013, 03:05 AM | #2 |
Private First Class
11
Rep 160
Posts |
I just placed my order a couple days ago. I was told they are currently out of stock and it will be another couple days for production/shipping. Once it gets here I'm looking to install ASAP and I will shoot you a pm or reply here with any findings.
|
Appreciate
0
|
06-01-2013, 01:56 PM | #4 |
Colonel
107
Rep 1,997
Posts |
The reason I was thinking about going HFC was for perhaps being able to pass emissions and no CEL, but if they're both an issue, not sure what the advantage of HFC over catless is.
|
Appreciate
0
|
06-01-2013, 04:28 PM | #5 |
Private First Class
11
Rep 160
Posts |
|
Appreciate
0
|
06-01-2013, 06:27 PM | #6 |
Private
6
Rep 60
Posts |
No i only have the downpipe and the m performance exhaust. But i have a europa model may be this is the reason. I think we have other emission control i dont know.
__________________
|
Appreciate
0
|
06-02-2013, 09:48 AM | #7 |
Lieutenant Colonel
413
Rep 1,975
Posts |
Smell and the black soot buildup
__________________
2013 F30 335i ///M-Sport
Forgestar/Challenge/BMS JB4 Wagner/Evo Race/M-Performance 2016 F15 50i ///M-Sport BM3/H&R/Borla |
Appreciate
0
|
06-04-2013, 10:30 AM | #8 |
Colonel
107
Rep 1,997
Posts |
|
Appreciate
0
|
06-04-2013, 01:58 PM | #9 | |
Lieutenant Colonel
413
Rep 1,975
Posts |
Quote:
__________________
2013 F30 335i ///M-Sport
Forgestar/Challenge/BMS JB4 Wagner/Evo Race/M-Performance 2016 F15 50i ///M-Sport BM3/H&R/Borla |
|
Appreciate
0
|
06-23-2013, 03:01 AM | #10 |
Captain
65
Rep 710
Posts |
I'd like to know this too
__________________
**JB Stage 1** 2012 F30 335i/BSM/Coral Red Interior/Diamond Black Trim/Premium Pack/BMW Apps/Ext Blue Tooth/Sirius XM/Sport Auto W/Paddle Shifters/Sport Suspension/Meisterschaft Super GT Exhaust
|
Appreciate
0
|
06-23-2013, 05:12 AM | #11 |
New Member
0
Rep 15
Posts |
Im installing the challenge hfc tomorrow on my RHD.
O2 sensor will make for a tight fit. Im running the Hartge tune so fingers crossed! will dyno to see power gains. |
Appreciate
0
|
06-23-2013, 05:23 AM | #12 |
Private
2
Rep 66
Posts |
Hi AussieF30. I assume you are on 335.. can feedback if the HFC with your Hartge have cel issue.. ? I may get the HFC too.. thanks..
|
Appreciate
0
|
06-23-2013, 05:37 AM | #13 |
165
Rep 1,536
Posts |
|
Appreciate
0
|
06-23-2013, 08:52 AM | #14 |
Colonel
107
Rep 1,997
Posts |
You can run it with map 2 of the JB4 Stage 2. Someone asked this question on the BMS website and Terry said yes as long as you're going with at least 93 octane fuel.
Still won't pass emissions in almost all situations and have to clear the CEL. He said gains should be on part with the catless with 8-10hp less. Not sure if the price for catted is worth it given slightly less performance and still the emissions issue. Regardless, it's still going to give you better spool and power than the stock version and slightly louder sounding exhaust note. |
Appreciate
0
|
06-23-2013, 09:19 AM | #15 | |
Captain
65
Rep 710
Posts |
Quote:
My main concern is smell because I meet a lot of clients etc and people on forums were saying the smell can stick to clothes etc with catless downpipe. I'd much rather get the cheaper better performance catless but seems HFC is much less smelly at the cost of some performance. Don't know. |
|
Appreciate
0
|
06-23-2013, 12:30 PM | #16 | |
Lieutenant Colonel
413
Rep 1,975
Posts |
Quote:
__________________
2013 F30 335i ///M-Sport
Forgestar/Challenge/BMS JB4 Wagner/Evo Race/M-Performance 2016 F15 50i ///M-Sport BM3/H&R/Borla |
|
Appreciate
0
|
06-23-2013, 12:44 PM | #17 | |
Colonel
107
Rep 1,997
Posts |
Quote:
With that said, they did note that it's due to the secondary cats that keeps it from smelling. Apparently, removal of that causes it to really smell. Take that for what you will. Like I said, I haven't had personal experience just sharing what others have said. Here are some comments I've found (some are specifically related to N54, but I'd expect the N55 DP change to be similar) "You won't have an odor if you have a stock N54 cutback. Once the secondary cats are warm, they're enough to prevent this. Personally, on my N54, I don't have any rasp or drone with the stock cutback and 3" AA downpipes." "I have a vert so I was really worried about the smell but after the first week it's not bad at all. Every now and then if I park in the garage, jump out, and walk behind the car i'll smell it. But generally the smell isn't an issue. Stock Catback with AA here" "There is a slight sound difference but I personally can't smell a difference with my ******* dps. I've had ******* downpipes in other cars without secondary cats and the smell is terrible." "I can smell a difference, but its not horrible. No one else has ever noticed it. " |
|
Appreciate
0
|
06-23-2013, 01:21 PM | #18 | |
Captain
65
Rep 710
Posts |
Quote:
__________________
**JB Stage 1** 2012 F30 335i/BSM/Coral Red Interior/Diamond Black Trim/Premium Pack/BMW Apps/Ext Blue Tooth/Sirius XM/Sport Auto W/Paddle Shifters/Sport Suspension/Meisterschaft Super GT Exhaust
|
|
Appreciate
0
|
06-23-2013, 01:25 PM | #19 |
Captain
65
Rep 710
Posts |
__________________
**JB Stage 1** 2012 F30 335i/BSM/Coral Red Interior/Diamond Black Trim/Premium Pack/BMW Apps/Ext Blue Tooth/Sirius XM/Sport Auto W/Paddle Shifters/Sport Suspension/Meisterschaft Super GT Exhaust
|
Appreciate
0
|
06-23-2013, 05:42 PM | #20 | |
Colonel
107
Rep 1,997
Posts |
Quote:
It does make more sense that the N54 would have more cats since there were double the down pipes (2 vs 1). |
|
Appreciate
0
|
06-23-2013, 06:56 PM | #21 |
Captain
65
Rep 710
Posts |
Yeah i think in Realty it probably smells really bad and the ones who say no smell are just trying to make themselves feel better about it. No offense but there's a lot of bias in these forums and I've seen enough of it to make a judgement when half the people say wow its smells like shit and the other half so oh no not at all no smell. Lol i think HFC it is ya'll I'd I wasn't meeting clients all day I wouldn't car about the smell.
__________________
**JB Stage 1** 2012 F30 335i/BSM/Coral Red Interior/Diamond Black Trim/Premium Pack/BMW Apps/Ext Blue Tooth/Sirius XM/Sport Auto W/Paddle Shifters/Sport Suspension/Meisterschaft Super GT Exhaust
|
Appreciate
0
|
06-23-2013, 06:58 PM | #22 |
Captain
65
Rep 710
Posts |
And can someone Pls explain what is a CEL? Also I'm reading that we don't get CEL with the high flow cats, is that true?
__________________
**JB Stage 1** 2012 F30 335i/BSM/Coral Red Interior/Diamond Black Trim/Premium Pack/BMW Apps/Ext Blue Tooth/Sirius XM/Sport Auto W/Paddle Shifters/Sport Suspension/Meisterschaft Super GT Exhaust
|
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|