CHALLENGE - F30 335 - HFC and Catless Downpipes - Now Released! - Pics inside - - Page 5 - BMW 3-Series Forum (F30 / F32)

1.fresh.f30.335 · 01-14-2013, 05:44 PM

Quote:

Originally Posted by GTM_Challenge

We havent played with any spacers onthe catless model yet There isnt alot of room to fit some of the spacers as well. We generally prefer to do it with software as a more consistant solution. The 335 is still lacking in some ECU options but im sure more will come with time.

our testing with the catless downpipe is limited right now as far as gains with a stock exhaust mostly due to the lack of ECU support. 10-20 hp/tq would be a pretty safe estimate though

Thanks guys, Much appreciated. Pumped to add you guys to the list of manufactures I have under the hood. You'll see my order come through soon.

Dreaming · 01-14-2013, 10:07 PM

I'd love to see a video of the catback with the stock exhaust.

pkim1079 · 01-15-2013, 01:13 AM

How bout a test pipe that "looks" like a catted pipe? With no honeycomb inside. Then spray paint it likes it rusty so when a cop inspects with a mirror it looks good to him?

Did this with my evo.

spideypm · 01-15-2013, 08:17 AM

Quote:

Originally Posted by GTM_Challenge

Youll have some more exhaust noise, but there should be no real change with vibration. Be sure they have bolted it in to the mounts there.

To me, the car feels sluggish even stock in comfort mode so its hard to tell. The turbo does come on stronger once spooled as you feel the TQ im sure. Hopefully you get your cat back soon so you can give a better driving impression.

Tks!!! I would love to buy the cat-back but when will you put it on sale??

GTM_Challenge · 01-15-2013, 12:27 PM

Quote:

Originally Posted by Dreaming

I'd love to see a video of the catback with the stock exhaust.

You mean a back to back with stock vs. Challenge catback?

Dreaming · 01-15-2013, 10:36 PM

Quote:

Originally Posted by GTM_Challenge

Quote:

Originally Posted by Dreaming

I'd love to see a video of the catback with the stock exhaust.

You mean a back to back with stock vs. Challenge catback?

I mean stock exhaust with hfc down pipe.

Renus · 01-17-2013, 04:29 PM

Quote:

Originally Posted by GTM_Challenge

All of the F30 Challenge exhaust parts are 100% bolt on. No cutting or welding.

My car is RHD, so will this DP could be installed in my car? And I couldn't see any exhaust for 335i in your website.

Besides, what is the different between your grill and bmw's genuine black grill which other selling it on $52 or below for each?

Brian@MWP · 01-18-2013, 12:21 AM

They look great! Cant wait to see dyno sheet on catless dp

spideypm · 01-21-2013, 10:23 AM

Hi Greg,

is it possible to install the downpipe incorrectly and still not have the CEL on? I had installed the HFC downpipe and tested it with P-Box. The numbers that i got was actually slower than a fellow 335i owner running stock. Like I had posted before I could feel the car pulling harder at high rev. is there any sign i should pay attention to?

Could it interfere with JB? At the time of the testing I had hooked my car up with JB but i had switched the JB off. Tks!

GTM_Challenge · 01-21-2013, 11:56 AM

Quote:

Originally Posted by spideypm

Hi Greg,

is it possible to install the downpipe incorrectly and still not have the CEL on? I had installed the HFC downpipe and tested it with P-Box. The numbers that i got was actually slower than a fellow 335i owner running stock. Like I had posted before I could feel the car pulling harder at high rev. is there any sign i should pay attention to?

Could it interfere with JB? At the time of the testing I had hooked my car up with JB but i had switched the JB off. Tks!

I havent used the JB at all with our downpipe so i cant say what effect it has or not. I dont know if it effects any of the learning on the ECU? You do any baseline of your car before the downpipe? Thats the best way to tell as you are comparing the same care. comparing dyno numbers even from what car to the next will have some difference even. The % in gains is what is actually measurable.

Feel free to PM or email me so i can help you best as possible.

1.fresh.f30.335 · 01-22-2013, 09:33 PM

Quote:

Originally Posted by GTM_Challenge

I havent used the JB at all with our downpipe so i cant say what effect it has or not. I dont know if it effects any of the learning on the ECU? You do any baseline of your car before the downpipe? Thats the best way to tell as you are comparing the same care. comparing dyno numbers even from what car to the next will have some difference even. The % in gains is what is actually measurable.

Feel free to PM or email me so i can help you best as possible.

If you guys are looking for dyno numbers around a DP with stock exhaust, w/JB I'm going with that set up within the next couple of months and have access to a machine... PM me if I can be of help.

mikew2069 · 01-23-2013, 08:20 AM

Quote:

Originally Posted by 1.fresh.f30.335

If you guys are looking for dyno numbers around a DP with stock exhaust, w/JB I'm going with that set up within the next couple of months and have access to a machine... PM me if I can be of help.

Just try and do before and afters! I'm alson going to do the same thing but I need to find a good dyno around here...

RollingLower42 · 01-29-2013, 01:20 AM

I like my challenge HFC cat, but I keep getting my CEL light coming on..

nsquared · 01-29-2013, 03:02 AM

Can the HFC DP be matted w/ the stock exhaust? If so, how much noticeable sound increase will there be?

shivaswrath · 01-29-2013, 10:02 AM

Quote:

Originally Posted by nsquared

Can the HFC DP be matted w/ the stock exhaust? If so, how much noticeable sound increase will there be?

I think they said it's an OEM swap, so to speak, so should be doable. If you get the high flow cat, you'll realize the most gains with this mod (usually)...you'll hear it, usually, more in the cabin, but like a sexy prrrr (my experience with DP's in other cars).

NICKTENN · 01-29-2013, 11:56 AM

Quote:

Originally Posted by RollingLower420

I like my challenge HFC cat, but I keep getting my CEL light coming on..

This concerns me, the whole reason I would want the HFC is to be code free without a code deleter. Any chance there's an error with the install?

nsquared · 01-29-2013, 12:27 PM

Quote:

Originally Posted by shivaswrath

I think they said it's an OEM swap, so to speak, so should be doable. If you get the high flow cat, you'll realize the most gains with this mod (usually)...you'll hear it, usually, more in the cabin, but like a sexy prrrr (my experience with DP's in other cars).

I'm just wondering if I should just do this mod vs. doing a custom catback for now since the DP will give me gains + sound.

GTM_Challenge · 01-29-2013, 02:04 PM

Quote:

Originally Posted by RollingLower420

I like my challenge HFC cat, but I keep getting my CEL light coming on..

Give me a call on it. See what we can do to help solve the problem. It's possible BMW updated the ECU programing, install issue, or even seen O2 sensors get dinged durring install and go bad.. Thanks!

GTM_Challenge · 01-29-2013, 02:05 PM

Quote:

Originally Posted by nsquared

Can the HFC DP be matted w/ the stock exhaust? If so, how much noticeable sound increase will there be?

Both downpipes can be matched to the oem exhaust using the OEM V band clamps.

nsquared · 01-29-2013, 11:23 PM

Quote:

Originally Posted by GTM_Challenge

Both downpipes can be matched to the oem exhaust using the OEM V band clamps.

Would you have any videos that show the HFC DP or even the catless DP w/ the stock exhaust?

RollingLower42 · 01-31-2013, 06:48 PM

Just an update, on my HFC DP, my CEL went off by itself.

Not sure why it came on, then went off on its own, but all of today it has been off.

PeterM · 01-31-2013, 09:27 PM

Quote:

Originally Posted by nsquared

Would you have any videos that show the HFC DP or even the catless DP w/ the stock exhaust?

Yes looking for this also.

01-15-2013, 01:13 AM	#91
pkim1079 Major Drives: e90 ///M3 ZCP + e82 135i DCT Join Date: Dec 2009 Location: lost angeles Posts: 1,471 iTrader: (0)	How bout a test pipe that "looks" like a catted pipe? With no honeycomb inside. Then spray paint it likes it rusty so when a cop inspects with a mirror it looks good to him? Did this with my evo. __________________ 1,2,3,4,5,6,7,8.3 shift! (repeat!!) who needs software when you can tune the DRIVER?

01-29-2013, 03:02 AM	#102
nsquared [Versatile] Drives: (S)LOW. Join Date: Jun 2011 Location: California & Utah Posts: 1,339 iTrader: (0)	Can the HFC DP be matted w/ the stock exhaust? If so, how much noticeable sound increase will there be? __________________ '13 AW F30 335i ///M-Sport 6MT. OEM(+). [Liquid Innovations] [Envisions] [Rob's Speed Shop]

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

01-14-2013, 10:07 PM	#90
Dreaming New Member Drives: BMW F30 335ixdrive msport Join Date: Jul 2012 Location: WV Posts: 13 iTrader: (0)	I'd love to see a video of the catback with the stock exhaust.

01-18-2013, 12:21 AM	#96
Brian@MWP Private Drives: BMW Join Date: Jan 2013 Location: Chicago Posts: 90 iTrader: (0)	They look great! Cant wait to see dyno sheet on catless dp

01-21-2013, 10:23 AM	#97
spideypm Private Drives: 2013' 335i M Sport Join Date: Oct 2012 Location: Taiwan Posts: 64 iTrader: (0)	Hi Greg, is it possible to install the downpipe incorrectly and still not have the CEL on? I had installed the HFC downpipe and tested it with P-Box. The numbers that i got was actually slower than a fellow 335i owner running stock. Like I had posted before I could feel the car pulling harder at high rev. is there any sign i should pay attention to? Could it interfere with JB? At the time of the testing I had hooked my car up with JB but i had switched the JB off. Tks!

01-29-2013, 01:20 AM	#101
RollingLower42 First Lieutenant Drives: 2012 BMW 335I Join Date: May 2012 Location: Los Angeles Posts: 329 iTrader: (0) Garage List 2012 BMW 335I F30 [0.00]	I like my challenge HFC cat, but I keep getting my CEL light coming on..

01-31-2013, 06:48 PM	#109
RollingLower42 First Lieutenant Drives: 2012 BMW 335I Join Date: May 2012 Location: Los Angeles Posts: 329 iTrader: (0) Garage List 2012 BMW 335I F30 [0.00]	Just an update, on my HFC DP, my CEL went off by itself. Not sure why it came on, then went off on its own, but all of today it has been off.