Exhaust Size Question?
Thread Starter
Instructor
Joined: Jan 2004
Posts: 107
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From: Las Vegas, Summerlin NV
Exhaust Size Question?
I was looking through MAD's website and noticed on the Borla exhaust sytems that the 2 1/2" exhaust has half the horse power of the 3" system. I am looking to get either the KBD mufflers or muffler eliminators. Should I get the 3 in or will the size not make a difference with just mufflers or elim.? I do not have any mods on the car if it would make a difference.... Thanks
http://www.madvet.com/shop?frame=3.119.992 KBD
http://www.madvet.com/shop?frame=3.119.987 Eliminators
http://www.madvet.com/shop?frame=3.119.992 KBD
http://www.madvet.com/shop?frame=3.119.987 Eliminators
Drifting
Joined: Oct 1999
Posts: 1,722
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From: Gloucester Va
Re: Exhaust Size Question? (TurismoVette)
Stock car I think either one will make a difference over stock mufflers. I will warn you though. You are most likely to pickup some res. around the 1300-1700RPM range. May not but don't be shocked if you do.
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: Exhaust Size Question? (TurismoVette)
For an LT1 with essentially dual exhausts the 2 1/2" system will be fine to about 400chp.
For an L98 with Y pipes I would use 2 1/2" for separate pipes into/from 3" at the Y.
For an L98 with Y pipes I would use 2 1/2" for separate pipes into/from 3" at the Y.
Safety Car
Joined: Apr 1999
Posts: 4,623
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From: Ohio
Re: Exhaust Size Question? (TurismoVette)
I don't understand what "the Borla exhaust sytems that the 2 1/2" exhaust has half the horse power of the 3" system" means. :confused:
Even if you have a built motor, there's not much chance that you will need anything larger than a 2.5" setup. Corsa did a dyno comparison on a stroked ZR1 with both a 3" and a 2.5" system. (both were Corsa setups) That car made more HP and TQ with their 2.5" system. Bigger is not always better as we have found in cams and heads.
Even if you have a built motor, there's not much chance that you will need anything larger than a 2.5" setup. Corsa did a dyno comparison on a stroked ZR1 with both a 3" and a 2.5" system. (both were Corsa setups) That car made more HP and TQ with their 2.5" system. Bigger is not always better as we have found in cams and heads.
Thread Starter
Instructor
Joined: Jan 2004
Posts: 107
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From: Las Vegas, Summerlin NV
Re: Exhaust Size Question? (h rocks)
I saw it in the Ecklers catalog. It was the B&B Tri-Flow Perf Exhaust. This is a direct quote from the catalog.
Note: 2 1/2" systems are available in lieu of the 3" systems at a lower cost, however, sound quality is the same, but horspower is half that of the 3" systems.
So I guess it is just there systems and not any others. :confused:
Note: 2 1/2" systems are available in lieu of the 3" systems at a lower cost, however, sound quality is the same, but horspower is half that of the 3" systems.
So I guess it is just there systems and not any others. :confused:
Race Director
Joined: Aug 2003
Posts: 11,043
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From: San Jose Pat Tillman - American Hero
Re: Exhaust Size Question? (TurismoVette)
Guys that have LT4s (stock exhaust size: 2 3/4") run Corsas (2 1/2") left and right and get dyno proven gains. As previously stated, 2 1/2" can flow *more* than enough for most motors. It's all about the mufflers (or "resonators").
