Going to try to siamese my exhaust dual 2.5" together into a 3" single pipe, then into a 3" in/3" out Flowmaster Super44 muffler. Is there any benefit or sound difference if the inlet is offset or centered, or if there is a single inlet and double outlet? I would prefer offset inlet/centered outlet, as the existing mufflers are, just for ease of installation (ie. not having to reinvent the wheel and rebuild the entire exhaust system). This will likely NOT be my final exhaust setup, still experimenting, and don't want to lock myself into something if I don't have to.
Center/Center F.M. will be louder than the offset ones. On my six the dual outlet muffler was louder than a single outlet. Dont know how it would be on a V8. If your looking for benefits ditch the flowmasters, you can look up the flow numbers and HP numbers on Google. They just plain suck, they sound good yes. But Most turbo mufflers out perform them, even though their design looks cruder.
Turbos outperform the Flows? Most studies show otherwise. Of course, most likely funded by Flowmaster. not really looking for each last hp, just like the sound of the dual flowsuper44s, but don't like the drone, which I am pretty sure comes from two flows dumping under the car. My truck has a 40 flow siamesed and is silent (drone-wise) but aggressive sounding. I think I can do the same with the car. My only other concern is the headers....I may have to wrap them to keep the header ping-noise down to a minimum. I am wondering how much of the drone noise is from the headers, and not the dual flows.
Dynomax even puts it on their boxes that they outflow flowmasters 2.5" Borla Turbo 373 CFM Dynomax super turbo: 278 CFM Flowmaster 40 Series: 229 CFM Glasspack 274 CFM Magnaflow 284 CFM Hooker Aero Chamber 324 CFM Hooker Max Flow 521 CFM Ultraflow Bullet 512 CFM I do like the flowmaster sound a lot myself, but they weren't loud enough for me haha, going with resonators now. I hope they are louder than mufflers.
I had a 2.5 into one 3" system with a flowmaster mounted in the stock location aft axle and it droned as bad as under the seats. It was an offset in and out. Looked cool, sounded bad a$$ at 4500rpm, but droned on the HWY. I've had several friends and customers use the Dynomax mufflers and they say they like them better than the flows...
Dynomax Turbos are pretty cheap. I might try to keep the dual setup and just swap the muffler, and see what that does for me.
On the falcon I run a cherrybomb turbo II($17 autozone) and I love it! At WOT its just as loud as the 40 series I had on before. But at cruising rpm it has a nice mild tone, nothing annoying like flows can be sometimes. And my favorite part is that it looks like a stock muffler
Dynomax super turbo is the best flowing one I think The thrush super turbo looks exactly like the Dynomax super tubo, except for the baffles. And the Thrush one is way cheaper than the dynomax one. There is a catch though, if you look at the pics the offset/offset ones look like they would outflow the offset/center ones. Because those have to travel around the tube inside. ^Thrush Super Turbo. And if your wondering where the "turbo" name comes from its the Chevy Corvair. Since it already had a turbo it was already quiet, but they wanted to get the last bit of noise out. So they came up with a muffler that would flow great and do minimal sound deadening. Hot Rodders caught wind of how great the mufflers were and they would go to the parts store asking for "covair mufflers" And then the aftermarket copied the design basically ripping off GM.
I might try those cherrybomb turbos, just cuz they are cheap, and I can get an idea if turbo muffs are the way to go. I can put them on slip-on style so as to not destroy my current setup, and continue using my flows if I don't like them.
I'm still thinking you're gonna have to exit past the rear axle to get rid of the drone......I'm just sayin'.......
here's some youtube vids of them of Ford small blocks: And my video for the muffler on the 200ci falcon. I'm just happy it didn't sound like a tractor
ive heard alot of theory as to why one muffler does beter than another. flow tests are good but ive heard claims that pulse manipulation helps some mufflers perform beter than others. ive also heard from flowmaster back in the 90s when i worked for a company that sold them, that they need at least one foot of tail pipe to work correctly. so when you have flowmasters just dumping, your not geting the optimum performance out of them, if what i was told was correct. i would think that they would put that on there packaging or instructions.
