Downpipes affect low end torque?

Briancanadiano · 11-27-2013, 08:45 AM

So I read somewhere that installing catless downpipes actually affects performance at low rpm, torque is affected.. High up you get more power but at the bottom of the rpm range you lose torque...
Is this actually true? Or just BS?
Let me know your thoughts! Thanks

marcvtec · 11-27-2013, 06:09 PM

I disagree you will have a faster spool up and will hit harder cause you can use a more aggressive map as well.

Zebra99 · 11-27-2013, 07:50 PM

Maybe you should read the graphs of before and after DP's. From 0-2000 rpm torque will be about the same and slowly increase and at 3k+ is the big kick in the ass. Absolutely awesome

bwco · 11-27-2013, 10:24 PM

Most important is a tune to go with it. I had immediately felt the loss of torque with my catless dp on my previous WRX. It was fixed by an aggressive map

Red_Bean_Bun · 11-27-2013, 10:34 PM

It's true unless you have a tune ...... And if you have a turbo or not.

11-27-2013, 08:45 AM	#1
Briancanadiano Brian335tt 98 Rep 1,227 Posts Drives: BMW 335i premium package 19"ri Join Date: Aug 2012 Location: Toronto iTrader: (3)	Downpipes affect low end torque? So I read somewhere that installing catless downpipes actually affects performance at low rpm, torque is affected.. High up you get more power but at the bottom of the rpm range you lose torque... Is this actually true? Or just BS? Let me know your thoughts! Thanks
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11-27-2013, 06:09 PM	#2
marcvtec Banned 407 Rep 2,704 Posts Drives: M5 Join Date: Oct 2006 Location: toronto iTrader: (0)	I disagree you will have a faster spool up and will hit harder cause you can use a more aggressive map as well.
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11-27-2013, 07:50 PM	#3
Zebra99 Colonel 112 Rep 2,856 Posts Drives: 2011 335is E93 Join Date: Aug 2011 Location: Ontario iTrader: (6) Garage List 2008 BMW 335i E93 [10.00]	Maybe you should read the graphs of before and after DP's. From 0-2000 rpm torque will be about the same and slowly increase and at 3k+ is the big kick in the ass. Absolutely awesome
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11-27-2013, 10:24 PM	#4
bwco Second Lieutenant 10 Rep 252 Posts Drives: 535i xDrive Join Date: Jan 2010 Location: Vancouver iTrader: (0)	Most important is a tune to go with it. I had immediately felt the loss of torque with my catless dp on my previous WRX. It was fixed by an aggressive map
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11-27-2013, 10:34 PM	#5
Red_Bean_Bun Captain 62 Rep 944 Posts Drives: E92 Join Date: Nov 2009 Location: Montreal iTrader: (4)	It's true unless you have a tune ...... And if you have a turbo or not.
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