Xpipe+super44's=nightmare
10-24-2009, 03:38 PM
#21
1st Gear Member
Join Date: May 2008
Location: Lake Jackson, TX
Posts: 134
I recently picked up an off road xpipe for my 07 and had to get mufflers since I had deleted my stock ones.... Having 2 other mustangs with flowmasters I decided to go the same route but try a diff set ( both the others have the traditional 40 series) so I picked up a set and installed them. Truely I have never been dissapointed with flowmaster till now, the sound is good below 2400rpms but above that it has this horible rahsp or buzz.... It reminds me of the way a v6 with no cats would sound with 40's on it. Has anyone else awoken the buzz monster with this setup? If so what did u do to stop it haha.
Thanks in advance
John
Thanks in advance
John
10-24-2009, 09:59 PM
#24
3rd Gear Member
Join Date: Apr 2007
Location: Pa
Posts: 763
Truer words have never graced these pages before....
I hafta back NIN up on this... Cat delete is never a good idea. You have to think of the exhaust system as a tuned system, at least as far back as the rear O2's anyway... The volume of air in there is a known quantity to the Spanish Oak processor (or more correctly the volume of air between the maf sensor and the rear O2 sensor), and any time you go messing with it without updating the airflow models the computer uses, it's not a good thing. If yourhot and heavy on modding the cats, go highflow. The stock cats are not that bad really anyway. I've seen 600 and 700 hp cars replacing the with highflow options and only seeing a 25 to 30hp gain, and offroad pipes not even getting that much.
I hafta back NIN up on this... Cat delete is never a good idea. You have to think of the exhaust system as a tuned system, at least as far back as the rear O2's anyway... The volume of air in there is a known quantity to the Spanish Oak processor (or more correctly the volume of air between the maf sensor and the rear O2 sensor), and any time you go messing with it without updating the airflow models the computer uses, it's not a good thing. If yourhot and heavy on modding the cats, go highflow. The stock cats are not that bad really anyway. I've seen 600 and 700 hp cars replacing the with highflow options and only seeing a 25 to 30hp gain, and offroad pipes not even getting that much.
10-25-2009, 11:24 AM
#25
Thread Starter
Join Date: Sep 2009
Location: MD
Posts: 16
/update/ I contacted flowmaster and they are sending me a set of traditional 40's free and I'm returning my 44's to summit 4 a refund. I decided to see what they would do 4 me and they are taking care of me! I was really surprised......
10-27-2009, 07:50 AM
#28
Thread Starter
Join Date: Sep 2009
Location: MD
Posts: 16
Yea I think the super 44 and the 4.6 3v W/x are not a good pair for some reason. I put a set on my neighbors charger about a year ago and he loves them, sounds decent to..... I still love the way my other 2 mustangs sound with flows just wish this one would sound the same.
10-27-2009, 08:47 AM
#29
5th Gear Member
Join Date: Jul 2006
Location: New Orleans
Posts: 4,491
Yea I think the super 44 and the 4.6 3v W/x are not a good pair for some reason. I put a set on my neighbors charger about a year ago and he loves them, sounds decent to..... I still love the way my other 2 mustangs sound with flows just wish this one would sound the same.