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#1
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Exhaust Size help
Ok, the deal is, that i just dropped in a 440. and i just bought and had installed a 2 1/4 inch exhasust system, with 2 chamber flowmasters. Knowing this isnt big enough, I am dispointed that i bought this, (not knowing i would be dropping a 440 in.)
ANyways, what size and type of exuast system would you use? here are the engine specs. 1968 440 block, .030 over, balanced 906 heads, 2.14, 1.81 valves 3 angle valve job, new springs Mopar 9:1 pistons Steel crank Performer RPM intake Holly 780 carb 3/8's fuel line Carter Fuel pump Double roller timing set Purple shaft Hemi Grind .474/.474 WIndage tray Schumacher Tri Y ceramic coated headers stock pan 727 trans w/B&M shift kit and shifter and deep pan K&N air filter Aluminum Water pump and Housing 8 3/4 rear with surgrip and 3.55 gearing If you need to know anything else in order to come up with a couple exhuast system ideas let me know, I cant think of anymore things off of the top of my head. THanks alot. |
#2
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While your 2-1/4" isn't that bad, a 2-1/2" would be better, and a 440 with build like that will like a 3" the best.
Mills |
#3
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Im not a machanic but i think that you need some backpressure. most people think they need a great big exhaust, but I would rather have a 2 1/4 than a 3. I think a 2 1/2 would be ideal for you set up.
By the by, do you love your tri ys? Thats the plan with my 440 a body. |
#4
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440barracuda...
Unless you have a lot of "extra" money laying around needing to be spent I wouldn't bother with installing another new exhaust system at this time. You have what sounds like a fairly mild 440 street package. When and if you really go nuts with compression, cam, etc. then you might want to bump up to a 3" system. If memory serves...Chrysler used a 2.25" system on the 440's and even most, it not all the street Hemi engines. It's your cash, and your car...but I wouldn't waste MY money to change out a new 2.25" system. Good luck, Mopar_Maniac |
#5
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OK, I think it's fine.... but...
1) Is this a street car, street/strip, strip only, 4x4 mudder, tow rig, what? 2) What is the inside diameter of your headers? If it's anything but a pure race car, you should be good to go with the setup you have. Making the pipes and mufflers bigger will mostly make the noise louder, and if you take any road trips, you will quickly get sick of it. By the way, what vehicle are we talking about? |
#6
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Well, the car is going to see some strip time, when i feel like having alittle fun. the motor could also be seeing some upgrades later on also, not sure yet, but it very well could be.
I like the Tri-Ys. they are great around the steering . the motor instal took 30-40 tops. THe car is a 1968 barracuda |
#7
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You didn't mention if you have a crossover pipe or not. An H-pipe will make the 2¼" pipes behave like 2½" pipes and a Mr. Gas X-pipe will make the pipes behave like 2¾" pipes.
If your pipes aren't mandrel bent, I would recommend upgrading to 2½" pipes with an X-pipe. If they are mandrel bent, then just add the X-p |
#8
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Well, the problem now, is that the exuast will not go to the headers, becuase, the headers are shorter than the ones i had on it before.
So, I am going to go with some pipes that will come out before the rear wheels, the tips will be stock 2002 viper tips. I just need to know what exhuast I should run. Any one here know what the loudest pipe/muffler combo are? I really want this car to be noticeable, without seeing the car. I want to wake up the neighborhood when i start the car up in the morning haha. any have any suggestions? |
#9
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If your 2.25 exhaust system is crimp bent it may be rather restrictive for your engine combo. 2.5" mandrel bent or 3" crimp bent would probably be better. When I had Flowmaster 2 chambers on my car with tailpipes I didn't like the metallic or tinny sound they gave the exhaust tone at idle. Plus they give off so much resonance at cruise rpm. I swapped to 2.5" Dynomax Ultraflows. To me they have a better exhaust tone and supposedly flow twice the scfm of the Flowmasters. I changed my system several times before I was satisfied.
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#10
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......... and us old farts wonder why we can't hear anymore. Guess maaybe we used to be young and noisy..... loud pipes, loud stereos and REALLY loud guns. Earplugs??? I'm a MAN - I don't need no stinking ear plugs.
Oh. well. |
#11
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[QUOTE]Originally posted by 440barracuda
Well, the problem now, is that the exuast will not go to the headers, becuase, the headers are shorter than the ones i had on it before. So, I am going to go with some pipes that will come out before the rear wheels, the tips will be stock 2002 viper tips. I just need to know what exhuast I should run. Any one here know what the loudest pipe/muffler combo are? I really want this car to be noticeable, without seeing the car. I want to wake up the neighborhood when i start the car up in the morning haha. any have any suggestions? [/QUOT Since you are exiting before the wheels, put 2 1/2 with an H pipe and two chamber flow masters. That's almost there race muffler. Pretty loud. Wont have room for an X pipe before the wheels I dont think. |
#12
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If you want a loud exhaust system, I have a 3.5" system with Dynomax 6" welded Race Mufflers. I wouldn't recommend it for the street unless you like setting off car alarms at idle.
I would use a mandrel bent 2.5" system with the large case "Hemi" dynomax superturbo mufflers. A 3" system would be louder, but more expensive and harder to fit under the car. |
#13
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2.5' Mandrel with an X-pipe. Look into Spintech mufflers, they are out of Southern California, and they seem to have a solution for just about everyone
http://www.spintechmufflers.com/spin...ntechindex.asp |
#14
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We got in trouble with our 3" non-mandrel bent 2 chamber flowmasters that exited out the back for excessive noise. We put the old 2 1/2 non-mandrel bent super turbo mufflers that turn down right before the rear axle. The car feels much slower with the 2 1/2 on it. BTW it is a 70 Challenger with a 451.
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#15
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Dynomax makes a 2 1/2 that enters and exists on the same end.
You can do it AAR style. I did not care for it cuz the exhuast blasted the cars next to me in traffic and I heard the exhuast in mono while driving. |
#16
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Well around here, were do not have many exhuast people that do mandrel bending, so i am thinking the normal bent 3 inch, with the 2 chambers, becuse then all i would only need to buy the pipes, and not have ot buy a whole new set when the mufflers were only used 5 times, for less than 10 minutes each time, and were not abused by the 318. I am thinking about exiting before the rear wheels, are there problems with this? I have a pic of a car around here, alot like mine, but jus has a different paint color, and a 318 that did this, and also a barracuda on my web site
www.mikesmusclecars.iwarp.com that has the pipes I might want to run. THanks for the help. |
#17
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Doing this will gain no performance. It is possible - even likely - that this will cost you some low-end.
I am sure, however, that the noise will impress your buddies, and you can always tell them that it shaved 2/10,000ths off your time. |
#18
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The non-mandrel bent 3" will be as restrictive as 2 1/2" mandrel bent. The 3" pipe is harder to bend, has more metal to shrink and expand. The 'kinks' in a regular bend 3" are more exaggerated the a 2 1/2" regular bend. So don't compare a 2 1/2" bend and think the 3" will look the same only 1/2" bigger. Plus as said, 3" is harder to fit. It may pay to find a shop that can do mandrel bending, whether 2 1/2" or 3" is used.
Cecil |
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