Limits of 2.5" H-Pipe Duals.... - Moparts Forums

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Limits of 2.5" H-Pipe Duals.... #1334086 11/11/12 11:00 PM 11/11/12 11:00 PM
Joined: Sep 2003 Posts: 10,645 Houston, Tx A AlexP OP I Live Here
AlexP OP I Live Here A Joined: Sep 2003 Posts: 10,645 Houston, Tx	What sort of power will a typical muffler shop 2.5" dual exhaust support with an H-pipe? I'm just trying to see if a motor capable of 600-800hp will lose a ton of power, or if it does lose some power, will it just be really quiet in comparison to a 3" dual? My Build thread: Let the hemi swap begin! 1968 wanna be pro touring whatchamacallit with some fancy stuff and a new roof skin.

Re: Limits of 2.5" H-Pipe Duals.... [Re: AlexP] #1334087 11/11/12 11:50 PM 11/11/12 11:50 PM
Joined: Nov 2004 Posts: 3,619 Norwich CT USA Defbob master
Defbob master Joined: Nov 2004 Posts: 3,619 Norwich CT USA	Go with 3" if you are looking for upwards of 800hp

Re: Limits of 2.5" H-Pipe Duals.... [Re: AlexP] #1334088 11/11/12 11:50 PM 11/11/12 11:50 PM
Joined: Nov 2003 Posts: 5,160 Texas dannysbee master
dannysbee master Joined: Nov 2003 Posts: 5,160 Texas	The F.A.S.T. cars are limited to a 2.5 exhaust, it does not seem to be too much of a hindrance for them. Getting old just means you were smarter than some and luckier than others.

Re: Limits of 2.5" H-Pipe Duals.... [Re: dannysbee] #1334089 11/12/12 12:02 AM 11/12/12 12:02 AM
Joined: Jan 2003 Posts: 10,766 Central Valley, CA. Quicksilver440 I Live Here
Quicksilver440 I Live Here Joined: Jan 2003 Posts: 10,766 Central Valley, CA.	Quote: The F.A.S.T. cars are limited to a 2.5 exhaust, it does not seem to be too much of a hindrance for them. I disagree...it is a hindrance...they would just make even more power with properly sized exhaust. They do make it work....but it's still a compromise.

Re: Limits of 2.5" H-Pipe Duals.... [Re: Defbob] #1334090 11/12/12 01:12 AM 11/12/12 01:12 AM
Joined: Aug 2003 Posts: 43,173 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,173 Bend,OR USA	Quote: Go with 3" if you are looking for upwards of 800hp My old 440 powwered 1969 Dart picked up from 12.23 at 109.5 MPH to 11.39 at 117.7 MPH by removing the old 2.5 inch inlet and outlet turbo muffs with 2.5 inch pipes coming out of the Hooker A body fenderwell headers with side pipes exiting in front of the rear tires My Duster has three inch pipes from the same headers straight back to a set of 3 inch in and out 14x7 Mganflow muffs mounted at the rear bumper, this car picks up .04 and 1/10 MPH in the 1/8 mile by removing the entire exhaust sytem. The increase in performance is probally do to the weight differences Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Limits of 2.5" H-Pipe Duals.... [Re: Cab_Burge] #1334091 11/12/12 01:05 PM 11/12/12 01:05 PM
Joined: Sep 2003 Posts: 10,645 Houston, Tx A AlexP OP I Live Here
AlexP OP I Live Here A Joined: Sep 2003 Posts: 10,645 Houston, Tx	I'll just have to run it as-is for now. Hopefully it will lose a little bit of power and still stay sorta quiet. It's a cent blown 3g Hemi... My Build thread: Let the hemi swap begin! 1968 wanna be pro touring whatchamacallit with some fancy stuff and a new roof skin.

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