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Re: Performance difference between 2 1/2" and 3" tailpipes [Re: Dodger440] #2100797
06/29/16 10:53 PM
06/29/16 10:53 PM
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
DARTH V8Я Offline
Oh No!! I just had a moron attack!
DARTH V8Я  Offline
Oh No!! I just had a moron attack!

Joined: Nov 2011
Posts: 2,154
Its a TRAP!
Lol ok Mr P. I yield to your 35 years experience in the exhaust lab.. I'm not as smart as you, I got no problems admitting it. That said, for the rest of us who want huffs in the stockish location,
the bigger the muffler (internally), the better. Helps dissipate heat & gas expansion.

^^ Crayola Crayon approved.


When it takes more than a sweet mullet to prove you rule at the trailer park..
Re: Performance difference between 2 1/2" and 3" tailpipes [Re: DARTH V8Я] #2100808
06/29/16 10:59 PM
06/29/16 10:59 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Originally Posted By DARTH V8Я
Lol ok Mr P. I yield to your 35 years experience in the exhaust lab.. I'm not as smart as you, I got no problems admitting it. That said, for the rest of us who want huffs in the stockish location,
the bigger the muffler (internally), the better. Helps dissipate heat & gas expansion.

^^ Crayola Crayon approved.


On the muffs.. your correct... bigger is better
EDIT
Give the crayons back to the kids where they belong
wave

Last edited by MR_P_BODY; 06/29/16 11:05 PM.
Re: Performance difference between 2 1/2" and 3" tailpipes [Re: Dodger440] #2101437
07/01/16 12:04 AM
07/01/16 12:04 AM
Joined: Feb 2005
Posts: 4,309
Prospect, PA
BSB67 Offline
master
BSB67  Offline
master

Joined: Feb 2005
Posts: 4,309
Prospect, PA
I would never run a 2 1/2" tail pipe on anything with 600 hp, that is just silly. whistling

Oh, curious, how do you know it is 600 hp?

Last edited by BSB67; 07/01/16 12:39 AM.
Re: Performance difference between 2 1/2" and 3" tailpipes [Re: Dodger440] #2101490
07/01/16 12:45 AM
07/01/16 12:45 AM
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
hemi-itis Offline
I Live Here
hemi-itis  Offline
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Posts: 12,587
Great Neck,LI,new york
How does things change when boost comes into the mix??


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: Performance difference between 2 1/2" and 3" tailpipes [Re: hemi-itis] #2101495
07/01/16 12:48 AM
07/01/16 12:48 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
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Posts: 52,972
Romeo MI
Originally Posted By hemi-itis
How does things change when boost comes into the mix??


The pressure goes up... your moving more air..
you know that
wave

Re: Performance difference between 2 1/2" and 3" tailpipes [Re: Dodger440] #2101498
07/01/16 12:51 AM
07/01/16 12:51 AM
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
hemi-itis Offline
I Live Here
hemi-itis  Offline
I Live Here

Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
Yea,I know,,,even with a 4 inch going into 3.5 there is ALOT of backpressure.I bought the material to install cut outs after the "X" and before the mufflers.


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: Performance difference between 2 1/2" and 3" tailpipes [Re: Dodger440] #2101621
07/01/16 03:32 AM
07/01/16 03:32 AM
Joined: Sep 2005
Posts: 620
Deep DEEP SOUTH
LAD 524 Offline
mopar
LAD 524  Offline
mopar

Joined: Sep 2005
Posts: 620
Deep DEEP SOUTH
I read a test where s dude with a big inch Hemi powered street based car had dual 3.5" out of his collectors to a pair of under-the-seat mufflers then into 3.5" tailpipes and he hated the volume of the exhaust.

So he dynod it on the chassis dyno to get a baseline.

He then proceeded to go from 3" to 2.5" to 2" tailpipes out to the rear bum;per and recorded the differences in HP/TQ.

The end result was a loss of a total of 6 HP from the 3.5" tailpipes to the 2" tailpipes yet the sound was WAY quieter and comfortable for him.

Make of it what ya'all will wink

Re: Performance difference between 2 1/2" and 3" tailpipes [Re: Dodger440] #2101776
07/01/16 11:47 AM
07/01/16 11:47 AM
Joined: Nov 2010
Posts: 3,696
jersey
S
Spaceman Spiff Offline
master
Spaceman Spiff  Offline
master
S

Joined: Nov 2010
Posts: 3,696
jersey
Don't the FAST guys only run a 2 1/2 system...
Of course, I'm sure their build is centered around that restriction..


526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!
Re: Performance difference between 2 1/2" and 3" tailpipes [Re: Dodger440] #2102165
07/01/16 10:30 PM
07/01/16 10:30 PM
Joined: Jan 2003
Posts: 17,916
Akron, Ohio
ProSport Offline
I Live Here
ProSport  Offline
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Posts: 17,916
Akron, Ohio
I'm gonna ask a dumb question just so I can get it out of my head, have any of you tried the Flowmaster B-body tailpipes on a Duster? Can they be made to fit or is it a completely different deal?
I want the TTI tailpipes but I'm gonna have to really be in the mood to do it as they are around $300 with shipping.


1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
Re: Performance difference between 2 1/2" and 3" tailpipes [Re: ProSport] #2102175
07/01/16 10:39 PM
07/01/16 10:39 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Originally Posted By ProSport
I'm gonna ask a dumb question just so I can get it out of my head, have any of you tried the Flowmaster B-body tailpipes on a Duster? Can they be made to fit or is it a completely different deal?
I want the TTI tailpipes but I'm gonna have to really be in the mood to do it as they are around $300 with shipping.


I'm sure with some mods they can fit.. lineup the hump
area(over the axle) and a B-body being longer you do a
couple of cuts to make them fit.... I dont remember the
hump being any taller or shorter
wave

Re: Performance difference between 2 1/2" and 3" tailpipes [Re: Dodger440] #2102178
07/01/16 10:51 PM
07/01/16 10:51 PM
Joined: Jul 2007
Posts: 271
MO, USA
Tom Hand Offline
enthusiast
Tom Hand  Offline
enthusiast

Joined: Jul 2007
Posts: 271
MO, USA


This is when it was running the 3" mufflers way at the rear. Right before the track closed he had his 2.5" Ultraflows back on and it was running 11.40s all night. The weather was better in late 2011 and and he had been playing with lifters and cams i think. He now has the 2.5" Superturbos on it since they are so quiet back under the rear with both outlets on the pass. side.

Re: Performance difference between 2 1/2" and 3" tailpipes [Re: Dodger440] #2102182
07/01/16 10:54 PM
07/01/16 10:54 PM
Joined: Jul 2007
Posts: 271
MO, USA
Tom Hand Offline
enthusiast
Tom Hand  Offline
enthusiast

Joined: Jul 2007
Posts: 271
MO, USA
I did all the exhaust work in his book and set up all the tests we ran at the track and on the engine test stand and coordinated all the supplies we used at Dad's house when we made the sound CD. Dad shelled out all the money! Like Dads do for their kids. If I knew how to post a picture, I have some taken of the car yesterday. It is still beautiful and faster than heck and so quiet.
Tom Hand

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