HFC loose metallic core

synolimit · 06-12-2013, 11:31 AM

Quote:

Originally Posted by Chuck33079

Yeah, you could always knock out the cats and enjoy your new test pipes. It wouldn't be too hard to do since the pipe is pretty much a straight shot all the way through.

Just knocking them out I'd be worried about power loss. That's on awfully big chamber to have wide open.

Chuck33079 · 06-12-2013, 11:34 AM

My first choice would be to send them back and get an unbroken set. Hollowing them out would still be better than stock cats. I'm not sure what the size of the cat chamber on those pipes are, so you may be right. My guess would be that you'd never know- the difference would be small enough to be within the range of dyno variance.

synolimit · 06-12-2013, 11:37 AM

Quote:

Originally Posted by Chuck33079

My first choice would be to send them back and get an unbroken set. Hollowing them out would still be better than stock cats. I'm not sure what the size of the cat chamber on those pipes are, so you may be right. My guess would be that you'd never know- the difference would be small enough to be within the range of dyno variance.

I'd say 4". They might change too going small, to big, back to small. Who knows though.

Chuck33079 · 06-12-2013, 11:44 AM

I don't know either. It may be one of those things where it's technically "worse" and the difference isn't noticable at all in the real world. I'd still just send them back or see if the warranty was transferable.

mag_black · 06-13-2013, 10:50 AM

06-12-2013, 11:34 AM	#2 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29540	My first choice would be to send them back and get an unbroken set. Hollowing them out would still be better than stock cats. I'm not sure what the size of the cat chamber on those pipes are, so you may be right. My guess would be that you'd never know- the difference would be small enough to be within the range of dyno variance. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

06-12-2013, 11:44 AM	#4 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29540	I don't know either. It may be one of those things where it's technically "worse" and the difference isn't noticable at all in the real world. I'd still just send them back or see if the warranty was transferable. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

06-13-2013, 10:50 AM	#5 (permalink)
mag_black A True Z Fanatic Join Date: Mar 2013 Location: Massachusetts Posts: 1,400 Drives: 09 370Z MT6 Rep Power: 668	Last edited by mag_black; 06-13-2013 at 10:55 AM.

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