Cat and res taken out with x pipe help!
Thread Starter
Member
Joined: Dec 2008
Posts: 189
Likes: 2
05 cl55 amg Renntech air box w/ K&N's LET 180 pulley & Tune, HE & Pump, 3'' Exhaust res/cat delete
Cat and res taken out with x pipe help!
I just replaced my cat with he magnaflow x pipe and went 3" back to the mufflers. It seems to be raspier then i thought espically than the videos i heard. But the more important thing is it seems to be alot slower espically fro
1st gear on the highway it seems to be quicker but i cant really tell. Can someone give me any suggestions or reasons of what it could be or what i should do to fix this. Im thinking the computer might just need to adjust adjust to the new system. Any help would be greatly appreciated. Thanks
1st gear on the highway it seems to be quicker but i cant really tell. Can someone give me any suggestions or reasons of what it could be or what i should do to fix this. Im thinking the computer might just need to adjust adjust to the new system. Any help would be greatly appreciated. Thanks
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Joined: Jul 2003
Posts: 1,687
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From: Western Canada
2013 C63 AMG P31, 2014 GMC Sierra (6.2)
You may have freed up too much back pressure and possibly lost some low end power (torque). Perhaps the ecu will adapt somewhat but if it doesn't then you may have to look at getting a custom ecu tune....
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Joined: Jun 2008
Posts: 3,834
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From: Texas
2003 CL55
I just replaced my cat with he magnaflow x pipe and went 3" back to the mufflers. It seems to be raspier then i thought espically than the videos i heard. But the more important thing is it seems to be alot slower espically fro
1st gear on the highway it seems to be quicker but i cant really tell. Can someone give me any suggestions or reasons of what it could be or what i should do to fix this. Im thinking the computer might just need to adjust adjust to the new system. Any help would be greatly appreciated. Thanks
1st gear on the highway it seems to be quicker but i cant really tell. Can someone give me any suggestions or reasons of what it could be or what i should do to fix this. Im thinking the computer might just need to adjust adjust to the new system. Any help would be greatly appreciated. Thanks
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
Thread Starter
Member
Joined: Dec 2008
Posts: 189
Likes: 2
05 cl55 amg Renntech air box w/ K&N's LET 180 pulley & Tune, HE & Pump, 3'' Exhaust res/cat delete
Did you have the same situation with yours. it seems like at low gears it takes a min to take off and feel like at first it lags. on the highway iot seems like it really moves quicker with a more steady flow in the power band it doesn't seem to pull as hard but I get up in speed alot faster than before. Could this possibly effect the temp on the car i don't know it it's me or not but it seems to run a lil warmer. a lil below the line between the middle of the one from the 80 and 120 if that makes sense. Any insight would help i'm about to put it back to stock and call it a day with messing with this thing.
Senior Member
Joined: Apr 2007
Posts: 418
Likes: 0
From: Toronto/Mississauga/Moscow
2005 Mercedes G55 AMG
Did you have the same situation with yours. it seems like at low gears it takes a min to take off and feel like at first it lags. on the highway iot seems like it really moves quicker with a more steady flow in the power band it doesn't seem to pull as hard but I get up in speed alot faster than before. Could this possibly effect the temp on the car i don't know it it's me or not but it seems to run a lil warmer. a lil below the line between the middle of the one from the 80 and 120 if that makes sense. Any insight would help i'm about to put it back to stock and call it a day with messing with this thing.
Hope this helps, but like I said, just drive it for 300 miles or so on this set-up! Let me know how it goes!
Thread Starter
Member
Joined: Dec 2008
Posts: 189
Likes: 2
05 cl55 amg Renntech air box w/ K&N's LET 180 pulley & Tune, HE & Pump, 3'' Exhaust res/cat delete
thanks for the advice. it's making me very hopeful. I was about to give up on the car. lol...I've been also researching a little on if there is anything on the cheaper side to do to help performance as well. I know we own very expensive cars and nothing is cheap but within reason. Maybe a couple hundred to few hundred dollar range.
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Senior Member
Joined: Apr 2007
Posts: 418
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From: Toronto/Mississauga/Moscow
2005 Mercedes G55 AMG
thanks for the advice. it's making me very hopeful. I was about to give up on the car. lol...I've been also researching a little on if there is anything on the cheaper side to do to help performance as well. I know we own very expensive cars and nothing is cheap but within reason. Maybe a couple hundred to few hundred dollar range.
So far, for the 55K cars I found that the best upgrades were:
Johnson CM30 Pump - 150$, the car was able to use it full pontential
Sec Cat + Res Delete - 200-300$, 10 rwhp gain
Green Filters - 150$, 4 rwhp gain
I think ASP pulley is still good buy for $800, but an ECU tune is highly advised to support it and thats where it gets pricey. Although LET offers an ECU tune for $800 I hear, I bet all the above + ASP + LET ECU will put you at 490 rwp....
I wish gains with the 63 were that easy... lol
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