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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > AR Catted DPs & Latest BMW Software/GIAC



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      11-04-2010, 02:01 PM   #1
I335
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AR Catted DPs & Latest BMW Software/GIAC

Question for you guys...

I have a 2008 E92 with GIAC stage 1 software and AE catless exhaust. I have AR catted DPs on order. Does anyone know if I'll need a DP fix with this setup? Will that be dictated by the BMW software or the GIAC software? I spoke with Andrew at AR design and he wasn't sure if I'd need a DP fix or not. I have pretty much the latest BMW software that went along with the HPFP recall a few weeks ago and Andrew wasn't sure if that version would still trip a CEL, but I'm thinking since I have a GIAC tune that wouldn't matter, or would it? I don't think the GIAC software changes everything in the file. Anyone have a similar setup and can share your experience?

Last edited by I335; 11-04-2010 at 02:02 PM.. Reason: Misspelling...
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      11-04-2010, 02:21 PM   #2
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You shouldn't need a DP fix with catted downpipes.
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      11-04-2010, 02:26 PM   #3
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You will need an O2 sim otherwise you will have to clear out an annoying SES light every couple of days. I speak from experience when I had GIAC stage 1 and AR catted DP. I don't think the BMW software will have anything to do with this.
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      11-04-2010, 02:37 PM   #4
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In the USA GIAC does not remove those codes because of the LAW.
Some people reported to get CELLS anyway with AR Catted Dps (you should have gone Catless IMHO) .
In case you get them just purchase the BMS 02 sims. Worked for me when i had GIAC.
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      11-04-2010, 06:45 PM   #5
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AR catted DP's here with latest software. Yes it will throw a SES light if you are not using a O2 fix.

I have had the pass few updates and for some reason they didn't throw a SES light without the 02 fix, they must have changed something with the latest.

I'm out of the country for a while so I took my V4 out to let my wife drive the car, she has been getting SES lights every few days, I have to teach her how to clear codes now with a BT.
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      11-04-2010, 09:54 PM   #6
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I got the same setup recently ... and I am throwing a 2C77 code ... anyone know what this is? I have the fix installed on seting 7pm. And the code comes back every 25kms or so ... is it a faulty rear sensor?

My car seems to run ok with the code ... will it effect performance?

Thanks
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      11-04-2010, 09:55 PM   #7
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I know of someone that has AR Catted DP's with our exhaust w/o secondary cats and he hasnt seen a single SES light on his dash. I dont think you'll have any issues.

Great choice w/ your Flash.

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      11-05-2010, 07:57 AM   #8
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Thanks for all the input guys - much appreciated. My plan is to get them installed and run them for a bit. If I get a CEL I'll just have to get a DP fix but I'm hoping I don't need it. Time will tell...

And Nick, it's great to hear from you my friend! I've been meaning to call you to do a little catching up as it's been a while since we last talked - I'll be sure to call soon. And regarding the exhaust, if you recall, I got one of the first ones you made and have been running it for quite a while now. It still looks brand new and still sounds fantastic! And I knew you'd approve of my choice of DPs - I think they're a perfect match with the AE exhaust and GIAC tune - quality/quality/quality. Once I install them I may just be able to say "I'm done" with my power/sound mods... We shall see...
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      11-05-2010, 10:15 AM   #9
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Quote:
Originally Posted by Nick@AEPerformance View Post
I know of someone that has AR Catted DP's with our exhaust w/o secondary cats and he hasnt seen a single SES light on his dash. I dont think you'll have any issues.

Great choice w/ your Flash.

Nick
WOW! Nice to see you posting, its been a while!!!!!!!! Doing better?
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      11-05-2010, 10:32 AM   #10
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Quote:
Originally Posted by Nick@AEPerformance View Post
I know of someone that has AR Catted DP's with our exhaust w/o secondary cats and he hasnt seen a single SES light on his dash. I dont think you'll have any issues.

Great choice w/ your Flash.

Nick
Hey Nick!

I have AR Catted DP's + AE exhaust (without secondary cats). I did not throw errors for a little over a year. After that time I started to get them. So I think the cat performance changes a little over time to where you will eventually need a simulator.

Before I ran with no simulator and passed the ODBII emissions test last December. Now I get codes, so I have turned the PROcede simulator on (o2 modifier=70%) and the codes are gone.
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      11-08-2010, 06:37 PM   #11
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Quote:
Originally Posted by I335 View Post
Thanks for all the input guys - much appreciated. My plan is to get them installed and run them for a bit. If I get a CEL I'll just have to get a DP fix but I'm hoping I don't need it. Time will tell...

And Nick, it's great to hear from you my friend! I've been meaning to call you to do a little catching up as it's been a while since we last talked - I'll be sure to call soon. And regarding the exhaust, if you recall, I got one of the first ones you made and have been running it for quite a while now. It still looks brand new and still sounds fantastic! And I knew you'd approve of my choice of DPs - I think they're a perfect match with the AE exhaust and GIAC tune - quality/quality/quality. Once I install them I may just be able to say "I'm done" with my power/sound mods... We shall see...
Hey Buddy! It definitely has been a while. I'll send you a PM in a few.

Quote:
Originally Posted by ar design View Post
WOW! Nice to see you posting, its been a while!!!!!!!! Doing better?
Hey Andrew! Its been a while still. Its still been difficult and everything is just little steps during fighting cancer. I'm feeling better everyday though.
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