This is topic Anyone running a 3" exhaust? in forum General Talk at Northern California Ford Owners  .


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Posted by 9cobra7 (Member # 2812) on :
 
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.
 
Posted by FireVert03 (Member # 9807) on :
 
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...
 
Posted by 03SVTPower (Member # 518) on :
 
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
 
Posted by WildFire532FB (Member # 1482) on :
 
3inch on my Fastback
 
Posted by 9cobra7 (Member # 2812) on :
 
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?
 
Posted by jaejae (Member # 7958) on :
 
3 inch mac catback [Wink]
 
Posted by Pure Stang (Member # 7251) on :
 
i doubt you would add 40rwhp with just getting a 3 inch exhust. your going to get some in the top end.
 
Posted by WIKDVNM (Member # 2805) on :
 
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 ]
 
Posted by WildFire532FB (Member # 1482) on :
 
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
 
Posted by Carless (Member # 9119) on :
 
Why not just get a cutout?
 
Posted by FireVert03 (Member # 9807) on :
 
quote:
Originally posted by Carless:
Why not just get a cutout?
I don't know if. Cutouts would be a good idea
 
Posted by DUMPD04 (Member # 9085) on :
 
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
 
Posted by fastcobra (Member # 10014) on :
 
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]
 




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