3 inch vs twin 2 1/2 - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Windsor Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 09-05-2004, 22:13   #1 (permalink)
Registered User
 
AU2XLSV8's Avatar
 
Join Date: Dec 2003
Location: Sunshine Coast QLD
Posts: 670
3 inch vs twin 2 1/2

Which is best? there is obviously a flow diifernce between the two but is there a descent amount of power or torque to be had in one over the other. I am thinking of this for my ute. N/a vs boosted application may be relevant.
__________________
347 238rwkw untuned and with a couple more lil things to change :)
Other car: BA FAIRMONT
Our cars are like Rage VS Silence
TKTDSGM Member
AU2XLSV8 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-06-2004, 01:40   #2 (permalink)
Two SC 61's = trouble
 
ebxr8240's Avatar
 
Join Date: Jul 2001
Location: Penrith,nswAus/Morrinville.NZ
Age: 61
Posts: 6,360
Re: 3 inch vs twin 2 1/2

Both are good..With single 3" is more critical what type mufflers are used..To keep sound and good flow top quality is needed...
__________________
Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
.
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
R.I.P Possum...
ebxr8240 is offline   Reply With Quote
Old 09-06-2004, 02:10   #3 (permalink)
Registered User
 
Join Date: Feb 2004
Location: Melbourne
Posts: 378
Re: 3 inch vs twin 2 1/2

I remember someone saying that a 3" creates more backpressure in the exhaust or something, or a loss of pressure which can restrict the flow....not sure if its a wives tale or true??
fOrD mAn Xf is offline   Reply With Quote
Old 09-06-2004, 02:22   #4 (permalink)
Registered User
 
eb2flyz's Avatar
 
Join Date: Jun 2004
Location: perth
Posts: 453
Re: 3 inch vs twin 2 1/2

get the best of both, run a twin all the way to the diff merge them into a single 3" muffler then out the back as a single 3", works pretty good on mine.
__________________
std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

http://www.icenet.com.au/~pie
eb2flyz is offline   Reply With Quote
Old 09-06-2004, 03:04   #5 (permalink)
Two SC 61's = trouble
 
ebxr8240's Avatar
 
Join Date: Jul 2001
Location: Penrith,nswAus/Morrinville.NZ
Age: 61
Posts: 6,360
Re: 3 inch vs twin 2 1/2

I doubt 3" is restrictive as I'm runing over 450h.p through one !!!2 X 2 1/2 and twin cats upfront through...
Yep two mufflers up front into single makes sence..That way an X pipe can be used....
__________________
Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
.
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
R.I.P Possum...
ebxr8240 is offline   Reply With Quote
Old 09-06-2004, 03:46   #6 (permalink)
Officially Bored with 347
 
svo347's Avatar
 
Join Date: Jul 2001
Location: Perth West Oz
Age: 41
Posts: 3,585
Re: 3 inch vs twin 2 1/2

3inch cats into a 3 inch Y piece, into a Genie s/thru tornado muffler...
Heavenly.... wouldnt you agree Flyz...
__________________
FORD.... "POWER TO THE PEOPLE"...

Member of the "TKTDSGM " Group..
svo347 is offline   Reply With Quote
Old 09-06-2004, 03:52   #7 (permalink)
Registered User
 
eb2flyz's Avatar
 
Join Date: Jun 2004
Location: perth
Posts: 453
Re: 3 inch vs twin 2 1/2

sounds nice brett, think mines sounds a bit tougher though :)
__________________
std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

http://www.icenet.com.au/~pie
eb2flyz is offline   Reply With Quote
Old 09-06-2004, 04:29   #8 (permalink)
Registered User
 
302_supra's Avatar
 
Join Date: May 2003
Location: Brisbane
Posts: 605
Re: 3 inch vs twin 2 1/2

my windsor is to be running twin 3" straight throughs. Thats for over 400hp though.
302_supra is offline   Reply With Quote
Old 09-06-2004, 04:36   #9 (permalink)
Officially Bored with 347
 
svo347's Avatar
 
Join Date: Jul 2001
Location: Perth West Oz
Age: 41
Posts: 3,585
Re: 3 inch vs twin 2 1/2

Ahahahahahahahah im sure it was from my car mate echooing from the houses back into your window hahahah
__________________
FORD.... "POWER TO THE PEOPLE"...

Member of the "TKTDSGM " Group..
svo347 is offline   Reply With Quote
Old 09-06-2004, 04:36   #10 (permalink)
Registered User
 
eb2flyz's Avatar
 
Join Date: Jun 2004
Location: perth
Posts: 453
Re: 3 inch vs twin 2 1/2

n/a, you would have no bottom end pwr what so ever with twin 3"s, a single 3" is more than enough for 400hp
__________________
std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

http://www.icenet.com.au/~pie
eb2flyz is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Windsor Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Formula 1 France Ambrose_1 Ford Racing Across the Globe 24 07-06-2004 22:38
Demerit Points Slabz The Pub 19 06-02-2004 21:47
how much should i expect to pay for a 2 1/2 inch ehxhaust? big_pete The Pub 9 09-21-2003 20:55
Vfacts PETE_XR6 The Pub 19 09-03-2003 16:28
Can ECU cars be tuned for PULP? EA S General Tech 26 12-07-2001 22:09

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 23:32.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.