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Author
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Topic: Anyone running a 3" exhaust?
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9cobra7
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Member # 2812
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posted
 
 
I'm about to upgrade from the 2.5" and was wondering if it worked for you and how much more power you got? I think this is only relevant to owners of at least 500 crank h.p. Thanks for feedback.
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If you can't walk and chew gum at the same time, don't walk.
Posts: 2633 | From: usa | Registered: May 2003
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FireVert03
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Member # 9807
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posted
I have 3" exhaust ...and I do feel a differance some people say they don't I'm running a ported blower on some juice so I did help out a little...
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1997 S/C cobra
2003 FireRed Cobra R.I.P
1995 Mustang GT
1989 Built 5.0(Sold)
Member of PBF
Posts: 1005 | From: Tijuana | Registered: Feb 2010
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03SVTPower
CAFords OG
Member # 518
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posted
3" catback here, but the previous owner already had it on when i got it, my other cobra had 2.5" but i cant really tell any difference, it does make it hard though when i was trying to put the new nitto style DR's on, exhaust got in the way
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2003 Redfire "AED" Cobra R.I.P
Posts: 3481 | From: Nor-Cal | Registered: Oct 2001
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Wildfire532FB
CAFords OG
Member # 1482
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posted
3inch on my Fastback
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68 Fastback
84 CJ7
94 HMMWV
95 GT
03 F350
17 Fusion Hybrid
Posts: 17580 | From: 530 | Registered: Jun 2002
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9cobra7
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Member # 2812
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posted
quote:
Originally posted by FireVert03:
I have 3" exhaust ...and I do feel a differance some people say they don't I'm running a ported blower on some juice so I did help out a little...
I'm doing 560 rwhp and it sounds like your close to or over what I have, I'm just wondering how much hp I'm going to free up with a 3". And I'm running cats on 91 octane with a crimp in my x-pipe for clearance issues. I'm wondering if I will hit 600 with this exhaust and no restrictive crimps?
Posts: 2633 | From: usa | Registered: May 2003
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Jaejae5.0
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Member # 7958
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posted
3 inch mac catback ![[Wink]](wink.gif)
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1987 notchback h/c/i 302 & 70mm turbo SOLD
2000 camaro ss cam only
Posts: 4890 | From: the combustion chamber | Registered: Oct 2007
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Pure Stang
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Member # 7251
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posted
i doubt you would add 40rwhp with just getting a 3 inch exhust. your going to get some in the top end.
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HEART BREAKER
R.I.P Willie Guzman (5ltrsvt) you will be missed brother.
04/24/87 - 11/23/2012
90 lx 347 RIP
86 gt
89 lx- next project
Posts: 6497 | From: San Jose | Registered: Nov 2006
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Impact 5.0
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Member # 2805
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posted
I am running American racing LTs to a 3 inch collector, 3 inch off road X pipe to a 3 inch Magnapack Ultra Flow CB... he only reason I did this was because both Shawn and Drew said anything less ( 2.5 or Cat's) was going to restrict my motor of HP. Running 560rwhp your motor is going to need more room to breath.
[ May 16, 2010, 04:02 PM: Message edited by: WIKDVNM ]
Posts: 2173 | From: Tracy, CA | Registered: May 2003
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Wildfire532FB
CAFords OG
Member # 1482
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posted
If the motor is blown bigger exhaust is a given.
I almost have 4 inch collectors on my big block but the calculations for my exhuast didn't say it would have been optimal so i have 3.5
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(]]]_ _ o _ _[[[)
|\_o_ __ __o_/|
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68 Fastback
84 CJ7
94 HMMWV
95 GT
03 F350
17 Fusion Hybrid
Posts: 17580 | From: 530 | Registered: Jun 2002
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Carless
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Member # 9119
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posted
Why not just get a cutout?
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*89 LX 5.0(sold)
*86 GT 5.0(sold)
*90 GT 5.0
Posts: 702 | From: East Bay | Registered: Apr 2009
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FireVert03
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Member # 9807
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posted
quote:
Originally posted by Carless:
Why not just get a cutout?
I don't know if. Cutouts would be a good idea
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1997 S/C cobra
2003 FireRed Cobra R.I.P
1995 Mustang GT
1989 Built 5.0(Sold)
Member of PBF
Posts: 1005 | From: Tijuana | Registered: Feb 2010
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Broke4.6
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Member # 9085
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posted
quote:
Originally posted by Carless:
Why not just get a cutout?
cutouts on mustangs just arent a good idea...they sound like shit to be honest..
only LSx motors sound good with a cut-out
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01 GT -lazer red- 32v swap
Posts: 1020 | From: Lodi, Ca | Registered: Apr 2009
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fastcobra
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Member # 10014
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posted
3 in is good but if u dont realy have a good power adder like turbos or if ur all motor u really need 600 n/a horses .that an issue on 5.0 mag was about 3 in ex but im trying to find the issue it was 2 1/2 years ago well cant find it run bassanies thats what i run on all my 4 stangs no cut outs from what i can remember thay ganied 35 rwhp on a n/a motor with long tubes and x straight threw muf turbo abd super was close to 50 rwhp ![[dance]](graemlins/dance.gif)
Posts: 11 | From: sf | Registered: May 2010
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