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Author
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Topic: What diameter exhaust pipe and what kind of muffler for my 289?
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Ralph Rebandt
Gearhead Posts: 342
From: Farmington Hills, MI
Registered: Feb 2000
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posted 10-30-2001 05:46 PM
   
As some of you know, I have been in the process of switching from the I-6 to the 289 V-8 in my 68 convertible. I am interested in a little performance, but not necessarily lots of noise, though some rumble is cool.I want to be able to hear the radio with the top down, and not have the muffler drown the music... I am also installing headman headers (shortys)what diameter pipe and what kind and brand of muffler do you all suggest?
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Fuzion
Journeyman Posts: 40
From: Torrance, CA
Registered: Oct 2001
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posted 10-30-2001 05:50 PM
i heard that 2 1/4 are usually the norm for installing a exhaust system. as for muffler choice i heard i think turbos? are good it hink that's what my neighbor has on his 66 coupe, he also has flowmasters on his 67 sbelby which sound really good too...i guess its all on choice? i'm planning to install 2 1/2 on my 66 fastback with flowmasters
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The Iceman
Gearhead Posts: 1756
From: Shelton, CT
Registered: Jul 2000
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posted 10-30-2001 05:53 PM
Flowmaster 3-chambers work pretty well - the drone is less im sure!
OR you could get used mufflers from a 99-01 GT from a Salvage yard, those would probably be perfect for what youre seeking -- Ive seen entire systems (h-pipe back) go for $100! 
have a good one  ------------------
Dan~
1965 Coupe "BeeBop" 200ci Straight "6"~2.77 3-spd w/Hurst Shifter~Pertronix Elec. Ign.~Flamethrower Coil~Flex-Fan~Clifford 6-2 Header~26" Smithys~3" chrome tips~'85 T-Bird TC buckets~'66 guages
https://mustangsandmore.com//ubb/TheIceman.html
http://www.motorcities.com/contents/01GF9250033520.html
Nothing Beats Six In A Classic Mustang! ;)
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steve'66
Gearhead Posts: 4085
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 10-30-2001 05:54 PM
Ralph,I agree 2 1/4" pipes with generic turbos will work fine and will give you the sound you're looking for. They are fairly quiet, cheap and still sound good. SteveW
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mellowyellow
Gearhead Posts: 4135
From: So. Fl.
Registered: Aug 2000
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posted 10-30-2001 06:47 PM
2.25 is a safe bet for a cv. Keep in mind that you're stuffing another pipe between the lower seat pans and you have a driveshaft and the cv stiffner plate to deal with. Flowmaster says that their 2.5 dual exhaust system is is not for for a cv, according to an article in M&Fords.
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mustangs68
Moderator Posts: 13896
From: Hampton,Virginia,USA 1968 Fastback & 1995 Vert MCA#39406 M&M #12
Registered: May 99
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posted 10-30-2001 08:25 PM
2 1/4 is what we're using,,DO NOT use 2 chamber Flowmaster if you want to hear the radio..LOL 
sam
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Ralph Rebandt
Gearhead Posts: 342
From: Farmington Hills, MI
Registered: Feb 2000
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posted 10-30-2001 10:18 PM
you guys are awesome!!! thanks....
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Fastymz
Gearhead Posts: 4277
From: Reno Nv MEM#1240
Registered: Apr 2001
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posted 10-30-2001 11:20 PM
I have the shorty hedman headers and three camber Flowmasters and they are still alittle noise at idle.But I have a 2.5 pipe with turn downs at the axle.I was told that would be more quite if you run the pipe out the back.What ever you do go for a H-pipe or X-pipe for little extra low end power and they smooth out the sound.Ive heard that the dyno flows are more mellow.
Ron ------------------
65 Coupe with a 351w, RPM intake,carter625,shorty hedders,2.5 exhaust,Flowmasters,Black Magic electric fan,stock C4,peg leg 8" 2:80,Big Boss 429 hood scoop,Cragers SS,Black Suede finish.
https://mustangsandmore.com/ubb/Fastymz.html
MEM#1240
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SteveLaRiviere
Administrator Posts: 23085
From: Saco, Maine USA
Registered: May 99
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posted 10-31-2001 09:26 AM
Ralph, use 2 1/4" pipes and Dynomax Super Turbo mufflers, you'll love them:http://www.dynomax.com/superturbo.stm ------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L DOHC Recycle --- Restore a Classic Ford!
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69maverick
Gearhead Posts: 733
From: Thomaston,CT.
Registered: Jan 2001
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posted 10-31-2001 03:13 PM
I just had my pipes made about a month ago! I have a 302 with a 4bbl holley and stock E.manifolds. They used 2.25 to the Dyno max turbo mufflers and 2.5 to the back of the car. It is pretty quiet at Idle but it has a nice rumble once you get in to it. I think next year I might go to 3 chamber flow masters? I want more noise!!!
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289 Rod
Journeyman Posts: 60
From: Laguna Niguel, CA, USA
Registered: Oct 2001
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posted 11-01-2001 12:10 AM
My car is to mild sounding and I want to make it louder. I am guessing flowmaster 2 chambers will make my car throaty and deep. My car is only loud when it is full throttle with the carb wide open. I am running non tri-y aftermarket headers, what is a good size for exhaust? Is 3 inches to much? I want to have that sound more often, like a stock nascar. ------------------
'65 Mustang Black/Black Pony Interior
289 4V 4 speed Manual
Weiand Dual Plane,AFR 165cc, Comp Cam Pro Magnum Rocker Arms, 3.55 Rearend
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SteveLaRiviere
Administrator Posts: 23085
From: Saco, Maine USA
Registered: May 99
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posted 11-01-2001 07:23 PM
Yes, 3 inch is really too much for a 289, you'll lose too much bottom end torque. Use 2 1/4" if it's pretty mild, and 2 1/2" if it's a bit more souped up. {There's an old term!  }------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L DOHC
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