Ok guys I have read too many posts about mufflers but HERES ANOTHER HAHAHA. Anyway I have a chance to buy gt take offs for $100 or get a set of flowmaster delta flow 40's for $102/each. The 40's are for gt's as well and I am adding duals to my car. Would it be better to go with the 40's or the take off's?
The stock v6 muffler is so restrictive that pretty much anything is better than it. Reasonably you should expect to see something like a 10rwhp increase from switching to a different muffler.
The v6 mustang shows little to no difference in performance from a single high performance muffler to dual exhaust (with stock or high performance mufflers), any increase that you would see with duals over a single would be small enough to consider insignificant.
The take-offs are nice, I used to run one on my v6, but they weren't deep enough for my taste. The Flowmaster 40's are notorious for having drone that will rattle your teeth out of your head. If it was my choice, i'd say hello to the 40's and goodbye to my teeth.
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Black 2005 Mustang v6, 5 speed, IUP, EUP and Leather.
Razzi 1/4 window scoops, Mustang GT Sway Bars, Flowmaster American Thunder Single Exhaust, Clear Front Turn Signal Lenses, Demolet CAI, X-cal2 91 tune, Hurst Comp/Plus Shifter, FRPP T-Lock, Ford 3.73 gears
The stock v6 muffler is so restrictive that pretty much anything is better than it. Reasonably you should expect to see something like a 10rwhp increase from switching to a different muffler.
The v6 mustang shows little to no difference in performance from a single high performance muffler to dual exhaust (with stock or high performance mufflers), any increase that you would see with duals over a single would be small enough to consider insignificant.
The take-offs are nice, I used to run one on my v6, but they weren't deep enough for my taste. The Flowmaster 40's are notorious for having drone that will rattle your teeth out of your head. If it was my choice, i'd say hello to the 40's and goodbye to my teeth.
I've got much respect for you Black Pony, I see you helping out a lot on these forums, however I have to bring up my former post about fabricating the original H pipes into oval shaped H pipes, because by theory, they should displace more exhaust then a normal Circular shaped pipe, how it does it I am not certain in theory, but almost all of my Auto Tech classmates agree, that if you take a normal circular H pipe assembly, heat each sides [perpendicular to one another] take an oval shaped clamp and clamp them into an oval pipe instead of circular, it should displace more exhaust, hence more breathing for the engine, aka, an increase in horse power. Now this theory, of course theoretically has not be preformed yet, and is just a theory. But once again theoretically if it does work, it doesn't matter what exhaust system you have, you'll notice the increase in HP no matter what.
Like I said Black Pony I have a lot of respect for you. But that's all we do in Auto Tech at Palomar in this semesters class, come up with theories, work on our cars, if we have the money test the theories, and see if they work.
I've got much respect for you Black Pony, I see you helping out a lot on these forums, however I have to bring up my former post about fabricating the original H pipes into oval shaped H pipes, because by theory, they should displace more exhaust then a normal Circular shaped pipe, how it does it I am not certain in theory, but almost all of my Auto Tech classmates agree, that if you take a normal circular H pipe assembly, heat each sides [perpendicular to one another] take an oval shaped clamp and clamp them into an oval pipe instead of circular, it should displace more exhaust, hence more breathing for the engine, aka, an increase in horse power. Now this theory, of course theoretically has not be preformed yet, and is just a theory. But once again theoretically if it does work, it doesn't matter what exhaust system you have, you'll notice the increase in HP no matter what.
Like I said Black Pony I have a lot of respect for you. But that's all we do in Auto Tech at Palomar in this semesters class, come up with theories, work on our cars, if we have the money test the theories, and see if they work.
I think what BlackPony is arguing is that you'll have diminishing returns with a better exhaust system. There is only so much power loss into the exhaust system. The V6 muffler sucks up most of the power in a stock setup. Once this is replaced, there is only so much power left that can be regained. Your oval H-pipe theory may well be true, but will only have a minimal gain on the 4.0 engine.
I've got much respect for you Black Pony, I see you helping out a lot on these forums, however I have to bring up my former post about fabricating the original H pipes into oval shaped H pipes, because by theory, they should displace more exhaust then a normal Circular shaped pipe, how it does it I am not certain in theory, but almost all of my Auto Tech classmates agree, that if you take a normal circular H pipe assembly, heat each sides [perpendicular to one another] take an oval shaped clamp and clamp them into an oval pipe instead of circular, it should displace more exhaust, hence more breathing for the engine, aka, an increase in horse power. Now this theory, of course theoretically has not be preformed yet, and is just a theory. But once again theoretically if it does work, it doesn't matter what exhaust system you have, you'll notice the increase in HP no matter what.
Like I said Black Pony I have a lot of respect for you. But that's all we do in Auto Tech at Palomar in this semesters class, come up with theories, work on our cars, if we have the money test the theories, and see if they work.
I understand where you're coming from but Frost has hit the nail on the head. What I was getting at is that the stock muffler is what creates the majority of restriction in the v6 exhaust system. Once removed or upgraded, it has been dyno proven that other exhaust mods (including headers, unless you have F/I or NO2) provide such an insignificant performance return that they're not noticeable except maybe on a dynosheet.
Your theory interests me though, trying different shaped pipes to provide different flow results. You might even come up with different sounds with the exhaust flowing through differently shaped chambers like that. I'm not sure if it will yield any performance gains, but it is pretty interesting.
So you go to Palomar College? I'm in the IBEW (International Brotherhood of Electrical Workers) going through the Inside Wireman Apprenticeship and all of our credits are through Palomar college. Good to see a classmate online.
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Black 2005 Mustang v6, 5 speed, IUP, EUP and Leather.
Razzi 1/4 window scoops, Mustang GT Sway Bars, Flowmaster American Thunder Single Exhaust, Clear Front Turn Signal Lenses, Demolet CAI, X-cal2 91 tune, Hurst Comp/Plus Shifter, FRPP T-Lock, Ford 3.73 gears
Ok so I changed my mind I went with the flowmasters and got them both for $190CDN. I didn't know I had to buy tips but thats in dew time. I am wondering tho when the shop puts them on can they be clamped to the GT mid pipes I have? It looks like they might have to add some extra pipe to make them fit. I don't want to make it hard for anyone that has to work on the underside of my car or if I get a short throw shifter and need to take the mufflers off to install it. Plus if I have to put resonators on where in the system do they go? Oh and has anyone bought the extra heat shield for the drivers side? I was thinking of doing that as well
40 series mufflers vs. gt take offs 
