3 inch true duals vs 4 inch mufflex
Registered User
Joined: Jan 2004
Posts: 1,406
From: Downey, CA
Originally posted by Xride
I assume that 3" would flow about the same as dual 2.5??
I assume that 3" would flow about the same as dual 2.5??
and 8 rwtq with a 2.5" dual vs a 3" cat-back. This is STP
corrected HP which is about 4% higher than SAE.
Granted, some of the gains came from the 2.5" catalytics
vs the stock 2.25" so it's hard to say exactly what came
from the cat-back part of the system. Because the gain
was decent I felt that it backed up my pressure drop
calculations which showed dual 2.5s better than a single
3.
Registered User
Joined: Jul 2002
Posts: 1,622
From: Edmonton, Alberta, Canada
Originally posted by truedualws6
The best test is dyno results. With my car I gained 12 rwhp
and 8 rwtq with a 2.5" dual vs a 3" cat-back. This is STP
corrected HP which is about 4% higher than SAE.
Granted, some of the gains came from the 2.5" catalytics
vs the stock 2.25" so it's hard to say exactly what came
from the cat-back part of the system. Because the gain
was decent I felt that it backed up my pressure drop
calculations which showed dual 2.5s better than a single
3.
The best test is dyno results. With my car I gained 12 rwhp
and 8 rwtq with a 2.5" dual vs a 3" cat-back. This is STP
corrected HP which is about 4% higher than SAE.
Granted, some of the gains came from the 2.5" catalytics
vs the stock 2.25" so it's hard to say exactly what came
from the cat-back part of the system. Because the gain
was decent I felt that it backed up my pressure drop
calculations which showed dual 2.5s better than a single
3.
could that be where the gains came from?
Registered User
Joined: Jan 2004
Posts: 1,406
From: Downey, CA
Originally posted by Xride
So you got a custom Y pipe made with the 2.5 dual right?
could that be where the gains came from?
So you got a custom Y pipe made with the 2.5 dual right?
could that be where the gains came from?
not have a y-pipe, it's a true dual system.
Registered User
Joined: Jan 1999
Posts: 989
From: Baton Rouge, la
Fast..all i know is that by just dropping the muffler at the track I picked up .25. Thunder racing also dynoed a car with the mufflex 4" with spintech and two out(just like mine) and picked up 28 rwhp by dropping the muffler.
Registered User
Joined: Jul 2002
Posts: 1,622
From: Edmonton, Alberta, Canada
Originally posted by truedualws6
Do a search on true duals and you will find the photos. I do
not have a y-pipe, it's a true dual system.
Do a search on true duals and you will find the photos. I do
not have a y-pipe, it's a true dual system.
I will do a search.
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