Welcome to Mustang Evolution.
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03-18-2006, 05:36 PM
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#1
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exhaust piping size
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Registered User
Join Date: Mar 2006
Posts: 18
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what size of pipe should i use 2.5 or 3.0 my car is completely stock plan on gettin intake programmer and pullies my friend told me 2.5 for a stock v6 is good 3.0 is too much what do yall think |
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03-18-2006, 05:49 PM
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#2
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Re: exhaust piping size
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YA RLY
Join Date: May 2004
City: Midwest City
State: Oklahoma
Posts: 894
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2.25", unless you plan on a blower or turbo setup. |
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03-18-2006, 06:06 PM
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#3
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Re: exhaust piping size
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postarama
Join Date: Aug 2003
City: Southaven
State: Mississippi
Posts: 24,353
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yeh, 2.25 is fine. That's what I have run on mine all the way back.
__________________
"I'm not driving too fast...just flying too low"
Mine:
-87 ranger- broke
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
Our's:
90 7up vert - new project
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03-18-2006, 07:11 PM
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#4
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Re: exhaust piping size
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Registered User
Join Date: Mar 2006
Posts: 18
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will i loose power with 2.5 inch pipes or what will happen |
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03-18-2006, 07:15 PM
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#5
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Re: exhaust piping size
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postarama
Join Date: Aug 2003
City: Southaven
State: Mississippi
Posts: 24,353
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On a stock car, you won't notice a difference between the 2. About the only thing 2.5 over 2 1/4 would do is reduce your backpressure and lower your torque slightly but raise your horsepower. Of course I'm talking about in insignificant measurements of horsepower.
__________________
"I'm not driving too fast...just flying too low"
Mine:
-87 ranger- broke
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
Our's:
90 7up vert - new project
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03-18-2006, 07:22 PM
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#6
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Re: exhaust piping size
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Registered User
Join Date: Mar 2006
Posts: 18
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so theres no diffrence between the 2.25 and the 2.5 will i loose or add in the 1/4 mile with the 2.5 |
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03-18-2006, 07:26 PM
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#7
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Re: exhaust piping size
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postarama
Join Date: Aug 2003
City: Southaven
State: Mississippi
Posts: 24,353
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You're not gonna get a difference in the quarter either way IMO. The gains/losses between the two are so insignificant it's not even worth worrying about on a stock car. If you are planning on building the engine or going with a forced induction system sometime, then the 2.5 will give you better gains in the future.
__________________
"I'm not driving too fast...just flying too low"
Mine:
-87 ranger- broke
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
Our's:
90 7up vert - new project
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03-18-2006, 09:42 PM
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#8
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Re: exhaust piping size
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Cammed Baby!
Join Date: May 2003
City: Chicago 'Burbs
State: Illinois
Posts: 1,713
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2.25 is better suited for a mild setup.
That is what my old exhaust was and worked well.
__________________
2003 SVT Lightning #1059 of 4270
2000 Vert 4R70W
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03-18-2006, 11:28 PM
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#9
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Re: exhaust piping size
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WTF^^...
Join Date: May 2003
City: Hoover / Florence
State: Alabama
Posts: 27,240
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until you have a good bit of power 2.25 is perfectly fine, if memory serves me right the exhaust 2.25 inch piping is not a problem until 300rwhp~
__________________
2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
MGW Shifter, Stingers, JLT, SS Inserts, MM FLSFC & CC Plates, SS Lines, H&R Race springs, IRS Brace, MRT Hood Struts
ME.com Member #29 - 400rwhp/380rwtq
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03-18-2006, 11:52 PM
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#10
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Re: exhaust piping size
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taking a break
Join Date: May 2004
City: Iowa City, IA
State: Iowa
Posts: 4,675
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I had 2.5" straight pipe mated with 3.5" tips, and it worked out just fine for me... so either way you go is fine. But think seriously about the power adder thing... cause you may want to, but you may also not have the means to get there.
__________________
2002 Sonic Blue GT, 5 Speed
Mods: MGW Short Throw Shifter, Mach 1 Brakes
17"x9" Cobra's, Borla Exhaust, Cold Air Intake,
Polished Stainless Steel Inserts, more interior aluminum than I know what to do with
2001 Silver v-6, totalled, then sold
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03-19-2006, 07:59 AM
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#11
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Re: exhaust piping size
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The Mustang's Human Twin
Join Date: May 2003
City: Terre Haute, SC for a bit
State: Indiana
Posts: 1,638
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Spec may be right on, but the #'s I have used all the time are 300 BHP, at the crank.
Our Even-fire V6's may get more out of the 2.25" pipes than a V8 does, we've got the
even fire advantage, and adding a crossover is a good bet for any nearly maxxed-out
exhaust system.
A quick ROT chart for exhaust system sizing...
(ROT = rule of thumb)
2.25": up to 300 BHP
2.5" : up to 400 BHP
3" : over 400 BHP
These will overlap somewhat, but these general guidelines work well
for Mustang use, and the available systems. It also assumes the use
of mandrel bent tubing, so get good quality pipe bending.
__________________
Originally Posted by Flex:
You are the true cam master dude...
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03-19-2006, 06:35 PM
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#12
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Re: exhaust piping size
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No more obstacles
Join Date: Jul 2005
City: Marin County, Nor Cal
State: California
Posts: 893
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friend of mine has 2.25" after the cats to the muffler, then after his flowmasters he has 2.5" that goes into 4" tips. it sounds great for a stock 6.
__________________
99 Cobra: flowmasters, 18x9.5 cobra R's, soon to be tuned and geared. daily driver
99 V6:in avatar, Mac Cai, true duals/flowmaster 40's ,UDP, custom tuned, bullitt suspension 18" wheels...taken by mother nature 
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03-19-2006, 06:41 PM
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#13
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Re: exhaust piping size
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Cammed Baby!
Join Date: May 2003
City: Chicago 'Burbs
State: Illinois
Posts: 1,713
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I need to get a new clip of my exhaust since the exhaust upgrade.
__________________
2003 SVT Lightning #1059 of 4270
2000 Vert 4R70W
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