Ams catted downpipes ?

runningthingz · 09-05-2014, 11:38 PM

I have the AMS catted downpipes and my CEL is on 80% of the time. Had my car dynoed at HG Motorsports and it was showing only 520 HP on a dyno jet on its best run. Worst run was around 490. I also have the Akra exhaust and GruppM intake. I'm thinking about going back to stock on the intake and downpipes. Super bummed about the drop in performance. Also, I've had these downpipes installed for around 6000 miles and has the dyno done about a week ago so the computer has had plenty of time to adjust.

PrimeTimeJohn · 09-06-2014, 12:55 AM

I just got a cel for the first time a month ago with my catted AMS DPs.

falsalem · 09-06-2014, 03:01 AM

Quote:

Originally Posted by PrimeTimeJohn

I just got a cel for the first time a month ago with my catted AMS DPs.

How many miles till the CEL came on ?

gmfive · 09-10-2014, 12:50 AM

Quote:

Originally Posted by MPowerrF10

Is the moral of the story here to keep the stock cats on?

Yeah, seems that way or we get Noelle dp's maybe?

wrsbmw · 09-10-2014, 07:21 AM

Quote:

Originally Posted by runningthingz

I have the AMS catted downpipes and my CEL is on 80% of the time. Had my car dynoed at HG Motorsports and it was showing only 520 HP on a dyno jet on its best run. Worst run was around 490. I also have the Akra exhaust and GruppM intake. I'm thinking about going back to stock on the intake and downpipes. Super bummed about the drop in performance. Also, I've had these downpipes installed for around 6000 miles and has the dyno done about a week ago so the computer has had plenty of time to adjust.

What was your dyno stock? What do you suppose is the reason you have lost power if that is the case?

runningthingz · 09-10-2014, 08:12 AM

Quote:

Originally Posted by wrsbmw

What was your dyno stock? What do you suppose is the reason you have lost power if that is the case?

I had a dyno done after having the Akra installed at EAS and it showed 534 hp. (Video here) The guys at HG Motorsports said its probably getting too much air w/ the downpipes, intake and exhaust and the computer hasn't adjusted for it. Said it really should have a proper tune done to it to get the most out of it. Not really sure what to do, I love how it sounds but the massive power drop really sucks.

wrsbmw · 09-10-2014, 08:26 AM

Quote:

Originally Posted by runningthingz

I had a dyno done after having the Akra installed at EAS and it showed 534 hp. (Video here) The guys at HG Motorsports said its probably getting too much air w/ the downpipes, intake and exhaust and the computer hasn't adjusted for it. Said it really should have a proper tune done to it to get the most out of it. Not really sure what to do, I love how it sounds but the massive power drop really sucks.

I haven't gotten a dyno done but I have the Dinan DTronics along with my Noelle pipes and the CAI. I talked to a guy named Noushy who got Stage 1 for his M6 and had gotten the Gruppe M intake prior that. He said the Stage 1 tune smoothed his car out a lot and was what the Gruppe M needed. I think Dinan is looking at a lot more than just boost and that it may make a difference for you. I think it's more of a tune than just a piggyback that adds boost.

I have better quarter times and trap speeds even in the bad heat of summer here in Texas after doing my mods. I think the Dinan has complemented the bolt-ons pretty well.

shahano · 09-10-2014, 09:13 AM

interesting.. Dinan tune is however 3000+ vs. BMS which is 500.

Nate@IND · 09-10-2014, 09:44 AM

Quote:

Originally Posted by runningthingz

I had a dyno done after having the Akra installed at EAS and it showed 534 hp. (Video here) The guys at HG Motorsports said its probably getting too much air w/ the downpipes, intake and exhaust and the computer hasn't adjusted for it. Said it really should have a proper tune done to it to get the most out of it. Not really sure what to do, I love how it sounds but the massive power drop really sucks.

Did HG turn off the M5 between dyno runs?

bm5bullit · 09-10-2014, 10:25 AM

Quote:

Originally Posted by gmfive

Yeah, seems that way or we get Noelle dp's maybe?

My buddy and I both got the AMS catted DP's almost a year ago and both of us got them installed by the local dealer. Neither one of us has had a problem with the CEL's. He puts a lot more miles on his car than I do and he is a regular at our local dragstrip. He is definitely faster than a stock M5 at the strip as he has gone head to head with a least two other M's. My car is definitely making more power and SOTP feel is definitely worth it. Spins tires at will in the first three gears and the sound alone is worth it. Just saying.

runningthingz · 09-10-2014, 01:34 PM

Quote:

Originally Posted by Nate@IND

Quote:

Originally Posted by runningthingz

I had a dyno done after having the Akra installed at EAS and it showed 534 hp. (Video here) The guys at HG Motorsports said its probably getting too much air w/ the downpipes, intake and exhaust and the computer hasn't adjusted for it. Said it really should have a proper tune done to it to get the most out of it. Not really sure what to do, I love how it sounds but the massive power drop really sucks.

Did HG turn off the M5 between dyno runs?

I'll find out.

PetrolFumes · 09-21-2014, 12:24 AM

Quote:

Originally Posted by runningthingz

I'll find out.

Dis you remove the intake ? Still have power Loss?

09-05-2014, 11:38 PM	#45
runningthingz Second Lieutenant 21 Rep 273 Posts Drives: Frozen White M5 Join Date: Dec 2012 Location: San Diego, CA iTrader: (0)	I have the AMS catted downpipes and my CEL is on 80% of the time. Had my car dynoed at HG Motorsports and it was showing only 520 HP on a dyno jet on its best run. Worst run was around 490. I also have the Akra exhaust and GruppM intake. I'm thinking about going back to stock on the intake and downpipes. Super bummed about the drop in performance. Also, I've had these downpipes installed for around 6000 miles and has the dyno done about a week ago so the computer has had plenty of time to adjust.
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09-06-2014, 12:55 AM	#46
PrimeTimeJohn Private First Class 8 Rep 119 Posts Drives: 2013 M5 Join Date: Jan 2013 Location: Orange County, CA iTrader: (0)	I just got a cel for the first time a month ago with my catted AMS DPs. __________________ PrimeTimeJohn
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09-10-2014, 09:13 AM	#52
shahano Lieutenant Colonel 231 Rep 1,576 Posts Drives: 21' M2C 6spd ,11' 1M, 88' M3 Join Date: Oct 2013 Location: London, UK iTrader: (0)	interesting.. Dinan tune is however 3000+ vs. BMS which is 500.
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