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BMW 3-Series (E90 E92) Forum
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Catless Downpipe
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09-15-2013, 06:33 PM | #23 |
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Only get it when decelerating in the lower gears but nothing annoying. It also happened with stock but that was more muffled. Not so now.
CEL error codes are usually supressed with a tune but as far as I know, to do so without a tune needs something like a Burger Motorsport DP Fix. |
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09-15-2013, 06:33 PM | #24 |
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It's quite expensive. How long does it take?
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09-15-2013, 06:48 PM | #25 |
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09-15-2013, 08:15 PM | #26 |
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Yea it's about a 2 hour job. Once you know what needs to be done then everything is quite easy just very tight fit! hahaha you are funny shane ! PE > straight Pipe > Back to PE again :P
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09-15-2013, 10:05 PM | #27 | |
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I found cattless dp + PE is very loud and the smell is intolerable for me. my current setup is cattless dp + N54 midpipe. it may sounds funny to other ppl whereas most of N54 owners try to swap to N55 midpipe. The smell is totally gone and its quieter. but it's not as responsive as before. I'm thinking to have catted downpipe and swap back to my old midpipe. any thought? |
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09-15-2013, 10:10 PM | #28 |
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09-15-2013, 11:36 PM | #29 | ||
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09-16-2013, 04:19 AM | #30 |
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Yeah i couldnt get my mate to fabricate me a straight pipe, a good deal popped up on a PE so i decided to buy that instead of paying an exhaust shop $300 for a straight pipe.
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09-16-2013, 04:22 AM | #31 | |
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Havig said that maybe being a N54 and yours an N55 is the difference? Hmm I cant really comment on going with a catted dp setup on a n54 as i havent any experience with that setup, but I think if I was in your situation i may possibly leave the setup as is. |
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09-16-2013, 05:52 AM | #32 | ||
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Ps. Now I have a spare n55 straight midpipe.
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09-28-2013, 09:15 AM | #33 |
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My first mod was AR DPs with JB4, which obviously was great in terms of power. Then I installed the PE exhaust. I found it to be too raspy with DPs, so I installed 2 resonators instead of the secondary cats. This got rid of the rasp but created more drone at lower revs.
Now I have my stock exhaust back on with the can flap open all the time. Happy with this set up now. |
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10-02-2013, 06:14 AM | #34 | |
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10-02-2013, 05:20 PM | #35 |
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10-02-2013, 05:38 PM | #36 |
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10-16-2013, 05:47 PM | #37 |
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Silly question lads, after JB4 and running map 2 on Caltex 98, if you go to AR DP's and a front mount, is there another map to go to or anything else to change? Or do you pick up power due to efficiency?
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10-16-2013, 05:56 PM | #39 |
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I've never used map 5 before it's always been map 2. I might try it today.
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10-16-2013, 06:03 PM | #42 |
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hahahaha - clearly not!
Details: http://www.n54tech.com/forums/showthread.php?t=10605 Maps: Map 0: Stock bypass. This is the only map you may use the OBDII diagnostic port with. Set to map 0 before dropping off for service, using a BT, etc. Map 1: 13psi (suggested for most stock applications) Map 2: 14.5psi (suggested for those with downpipes and 93 octane) Map 3: Progressive meth mapping with flow sensor failsafe. See guide to enable. Meth use isn't supported/suggested without a flow sensor and map 3. Map 4: Stock map w/ CAN active. Allows full logging and in dash gauges on the stock mapping. Map 5: Autotuning map. Boost ranges between 12-17psi based on your cars octane, conditions, and modifications. Fully E85 compatible. If using E85 we suggest around 30% to start. Refer to the E85 FAQ for addl info. Map 6: User defined map generally only used for diagnostics or troubleshooting. Map 7: Race gas map. 18.5psi peak boost on the G5 ISO. Requires straight 100-104+ RM2 octane unleaded racing fuel. The expensive stuff. We do not suggest using leaded racing fuel. To use this map with E85 requires the BMS E85 back end flash, inline booster fuel pump, and a 60% E85 mix. Map 8: Economy / Non-Turbo map. Triggers a 3100 "reduced power mode" code while active. After switching back to a normal map you will need to restart the car for the code to clear. 1) Steering wheel controls menu attached. Note this guide is for the latest G5 board. For those using the older system refer to the FAQ for a link to the old sheet. 2) If you have an off road race car with downpipes turn autoclear on in the JB4 by selecting option 1/3. Even with autoclear enabled real codes will still throw a check engine light in dash. 3) JB4 has cold/hot oil protection built in. So expect stock like boost until oil temps are > 160 degrees. Same goes for oil temps > 280 degrees. |
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10-16-2013, 06:07 PM | #43 | |
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But I know that map 5 is auto-tune. Which means that sometimes it can have more boost and sometimes it's less depending on tempreture and condition of the engine (Whatever that means) I guess? Correct me if I'm wrong.
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