cutouts?

burlingtonNC98GT · June 3rd, 2007, 06:57 PM

sorry guys. might be kind of a stupid question but what exactly do exhaust cutouts do and what is the advantage to having them?

beheivjer · June 4th, 2007, 09:00 AM

go on before the mufflers and allows you to run open exhaust at the track

burlingtonNC98GT · June 4th, 2007, 02:58 PM

wouldnt u lose horsepower from the lack of back pressure if u ran open exhaust?

Boomer · June 4th, 2007, 04:59 PM

Originally Posted by burlingtonNC98GT

wouldnt u lose horsepower from the lack of back pressure if u ran open exhaust?

Under most circumstances yes, have a tune for a open header could net a few horsepower but tend to decrease torque. On a NA engine the higher pressure differential in the exhaust will tend to draw the intake charge making more power, its physics... Schools out !!!!!

AnglicoGT98 · June 5th, 2007, 05:10 PM

Very nicely worded Boomer. (Saying this while making a smug face and givinga golf clap..haha) Is this also called having an "open loop" tune?? Just curious.

Boomer · June 5th, 2007, 08:23 PM

Originally Posted by AnglicoGT98

Very nicely worded Boomer. (Saying this while making a smug face and givinga golf clap..haha) Is this also called having an "open loop" tune?? Just curious.

You would not need a tune for "open loop", you would just want to adjust timing and MAF tables for optimum performance with open headers. Although for strictly track use you could tune it any way you want.

jersey98gt · June 6th, 2007, 08:35 AM

you really know your stuff

June 3rd, 2007, 06:57 PM	#1
burlingtonNC98GT Regular 1998 Mustang GT Join Date: Jan 2007 Location: Burlington, NC Posts: 167	cutouts? sorry guys. might be kind of a stupid question but what exactly do exhaust cutouts do and what is the advantage to having them? __________________ 1998 GT PI cams bbk cai flowmaster 40's catback bbk x-pipe w/ cats march pulleys RAM clutch Steeda Tri-axe

June 4th, 2007, 09:00 AM	#2
beheivjer Enthusiast Join Date: Feb 2006 Location: belding, michigan Posts: 818	go on before the mufflers and allows you to run open exhaust at the track __________________ 1966 LUBR Bronco 1979 2.3t Cobra 1994 V6 Vert & a 351 ON A STAND 1997 Black Cobra 1994 Jeep XJ 4.5" lift 33"MTR http://www.cardomain.com/ride/680999 http://www.myspace.com/beheivjer

June 4th, 2007, 02:58 PM	#3
burlingtonNC98GT Regular 1998 Mustang GT Join Date: Jan 2007 Location: Burlington, NC Posts: 167	wouldnt u lose horsepower from the lack of back pressure if u ran open exhaust? __________________ 1998 GT PI cams bbk cai flowmaster 40's catback bbk x-pipe w/ cats march pulleys RAM clutch Steeda Tri-axe

June 5th, 2007, 05:10 PM	#5
AnglicoGT98 Enthusiast Join Date: Feb 2007 Location: Coral Springs, FL Posts: 633	Very nicely worded Boomer. (Saying this while making a smug face and givinga golf clap..haha) Is this also called having an "open loop" tune?? Just curious. __________________ Parting out 2003 SVT Cobra Air/Fuel http://www.moddedmustangs.com/forums...003-cobra.html Engine http://www.moddedmustangs.com/forums...003-cobra.html

June 6th, 2007, 08:35 AM	#7
jersey98gt Enthusiast Join Date: Jan 2007 Posts: 661	you really know your stuff __________________ -BBK CAI, BASSANI CB + X, SCT 93 tune, 4.10s, Cobra brakes, Cobra R wrapped in nitto 555 tire. -College Football and studies take up the bulk of my time.

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