01-24-2014, 08:31 PM | #45 |
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I am noticing the smell a bit, my G35 had catless down pipes and I could smell the fuel on my clothes after i got out of the car. This is nothing like that but at stop lights with the windows up I do catch the smell, as of now I can live with it.
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X5M, Eisenmann exhaust, 22" HRE wheels, catless down pipes, Stage II tune/X5 Diesel, Lowered & Tuned
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01-25-2014, 09:23 AM | #46 | |
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Damn I need downpipes... I like your DIY SylvanLAke. This will be my next plan for this Spring. Yes they dynoed my car last fall. I have to find the dyno chart somewhere then post it. It got about 645-660 HP with octane 94. for ecuprogram! |
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05-26-2015, 07:34 AM | #47 | |
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The smell is important detail to me as I still have young kids I don't want getting sick or high when I drop them off @school one day in the modded X5M So I gotta find DPs wRace cats or a shop that can install small enough Race cats that would fit n work |
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08-20-2015, 12:29 PM | #48 |
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Any updates on this? Someone is selling used Akropovic for $1900, eBay has AR Design for $1400 but free is always best. Just trying to determine a HP per cost ratio...like if gutted gets 650 but Akro gets 660, that's a huge difference and I'd settle on gutted.
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08-26-2015, 04:31 PM | #50 |
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I can't imagine that there would be any noticeable differences between different manufacturers. Its just a hollow pipe that connects turbo to the exhaust system. A hollow pipe is a hollow pipe.
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08-26-2015, 09:21 PM | #51 |
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I've deleted one set of cats on my Harley F150, but that's a different beast all together.
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08-26-2015, 09:23 PM | #52 |
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I'm guessing the same, the biggest differences I'd guess is overall fitment...which I'm assuming means being able or not being able to smell the exhaust in the car.
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08-26-2015, 09:26 PM | #53 | |
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Last edited by m5james; 09-04-2015 at 06:02 PM.. |
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08-27-2015, 10:21 AM | #54 |
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I bought the ultimate racing catless downpipes and it fits like OEM did. I still experience fumes smell when the windows are down. It bolted flush and I even replaced the gaskets. Anyone remove cats and not experience some fumes? I think it's just the nature of the beast.
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09-04-2015, 03:17 PM | #56 |
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Sorry I never did get any dynos or track numbers. However my tuner said my tune was pretty much the same as the tune on his personal X5M with AR down pipes. So the same boost and AFR as he ran, he said mine felt as fast as his too.
For a little bit of labour and no cash it was the best mod I did, of course it was paired with an ECUProgram stage II tune so the diffrence was night and day it was a beast after the tune and cat removal.
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X5M, Eisenmann exhaust, 22" HRE wheels, catless down pipes, Stage II tune/X5 Diesel, Lowered & Tuned
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09-04-2015, 06:08 PM | #57 |
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Thanks for not getting mad I hunted you down for a reply, Sylvan ;-) Seeing that the outlet of the turbo isn't' all perfect and smoother, a flapper valve in the path, etc etc I'm definitely leaning more towards free horsepower. I can understand what people mean about turbulence, but it reminds me of a video I saw about pickup trucks that do or don't use a tailgate...a pocket of air fills the voids and air flows freely and openly over the rest, hence why things don't fly out of the bed nearest the cab. Yes, I'm filling a small cavity of air before it flows out, once catless downpipes come down to reasonable prices then maybe I'll do a before and after, so until it can be proven that one will make huge gains over the other, free is free.
Last edited by m5james; 09-14-2015 at 01:25 AM.. |
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09-14-2015, 03:19 PM | #58 |
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Drill motor, 12" long 1" paddle bit and 10 min later I've got a bucket full of precious metals and made myself some catless downpipes. Truck is down due to leaking PCV/oil return pipes so I'm thinking I'll get a tune while I wait...I was going to use Burger but after reading online, most everyone says you'll never get as much horsepower with a piggy back vs doing an actual flash.
Sylvan, where'd you recycle this stuff?
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'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's '97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's |
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09-14-2015, 05:06 PM | #59 |
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the burger piggy back also doesnt turn off the rear O2's, so you'll have a check engine light on due to not having cats. I've been reading and it seems that either ESS or AA are the most reliable tunes to get
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09-14-2015, 05:12 PM | #60 |
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Velos, ECUProgram and other non-piggyback types all seem to have good reviews, even the underpowered and overpriced $$Dinan$$...be it people justifying what they paid to not knowing the wiser because they've got nothing to compare with. Until there's a tune to tune shootout, it's all a crap shoot with each tuner having different numbers from countless variables...car, conditions that day, dyno, etc etc. All of them offer customer service, all of them think theirs is the best, but prices are all over the highway.
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'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's '97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's Last edited by m5james; 09-14-2015 at 05:18 PM.. |
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09-14-2015, 08:53 PM | #61 |
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m5james hit it right on the head...
Here in Texas, me(DFW) and my Buddy Jose (Ft.Hood) both have 2010 X5Ms and will do exactly that.....similar Mods.....(Exhaust/Gutted OEM DP/K&N Filters/ charcoal filter delete)....different tunes...... I will go Velos stage 2, i think he will try Burger we will them line them and go atleast a dozen times or until we experience heat soak and report back.
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Leonel aka Rico /// BMWCCA # 403748
10 X5M - Pure Stg.2 turbos/K&N/JB4/Becker 3" Catless DPs/Megan Racing Ti Exhaust/H&R/Rohana RC22s/Vrederstein Ultrac Sessanta/Soon/+BMS+KWV3s+OSSDesign headlights..... |
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09-15-2015, 12:02 AM | #62 |
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I've been torn between Burger (ease of installation but lacking the ability to shut off the CEL for gutted cats) or Eurocharged (seem to be the only ones on www.dragtimes.com with consistent trucks in the low 12's) while being decently priced and offering lifetime upgrades.
PS - I'm buddies with Derek, another HPF guy
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'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's '97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's Last edited by m5james; 06-08-2016 at 12:14 AM.. |
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09-15-2015, 12:11 AM | #63 | |
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Leonel aka Rico /// BMWCCA # 403748
10 X5M - Pure Stg.2 turbos/K&N/JB4/Becker 3" Catless DPs/Megan Racing Ti Exhaust/H&R/Rohana RC22s/Vrederstein Ultrac Sessanta/Soon/+BMS+KWV3s+OSSDesign headlights..... |
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09-15-2015, 12:31 AM | #64 |
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Yeah, he's a good guy. I met him and Brian when they broke down coming back from Bimmerfest '12...fortunately it happened in Oregon as well :-) I don't talk to Brian anymore but Derek's since sold the car, got dual lifted Jeep Unlimiteds for him and the wife and he's been looking into TT Lambo's now. I'll tell him you said hey!
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'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's '97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's Last edited by m5james; 09-15-2015 at 12:39 AM.. |
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02-26-2016, 05:18 PM | #65 |
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I remember the write up thread... Most of the fastest cars back then had piggies.
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02-26-2016, 05:19 PM | #66 |
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Im going to do this and have some high flow cats welded in to the exhaust... No way i'm paying almost $2k for downpipes. That's just highway robbery.
I also have a buddy with a Dyno so ill get before and after results.
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