Has anyone ever used flowmasters exhaust system? It is a turbo back kit. I have a 96 Ram. No mods yet. The exhaust on the truck seems smaller than stock. I bought the truck used.<br><br>Thanks<br><br><br>

 

Flowmaster. If you want a better exhaust, just cut off your stock muffler. Or get a bullet muffler put on in it's place. Or get a full 4&quot; turbo back system from one of the many vendors on here. Don't waste your money on the Flowmaster.

 

IMO the only piece that Flowmaster makes that works great on our trucks is the single 4&quot; to dual 3&quot; &quot;Y&quot; collector. 8) ;D

 

4&quot; to 3&quot;? I want single 4&quot; in and 4&quot; y out. ;D I would love to see what my truck sounded like/looked like with dual 4&quot; straight pipe. ;D

 

[quote author=BigBlue link=board=7;threadid=15034;start=0#141091 date=1053642546]<br>4&quot; to 3&quot;? I want single 4&quot; in and 4&quot; y out. ;D I would love to see what my truck sounded like/looked like with dual 4&quot; straight pipe. ;D<br>[/quote]<br><br>I bet it would sound cool.<br><br>but<br><br>Single 4&quot; area=12.57&quot;^2<br>Dual 3&quot; area=14.14&quot;^2<br>Single 5&quot; area=19.63&quot;^2<br>Dual 4&quot; area=25.14&quot;^2<br><br>with that large of an increase in area, what do you think would happen to exhaust gas velocity?<br><br> <br>

 

It would slow rapidly, creating a lower pressure and create an even greater scavenging effect.<br><br>Wrong? Right?<br>The Good, Bad, or the ugly,, Diesel Freak, What are your thoughts?<br><br>Merrick Cummings Jr

 

[quote author=MCummings link=board=7;threadid=15034;start=0#141134 date=1053651248]<br>It would slow rapidly, creating a lower pressure and create an even greater scavenging effect.<br><br>Wrong? Right?<br>The Good, Bad, or the ugly,, Diesel Freak, What are your thoughts?<br><br>Merrick Cummings Jr<br>[/quote]<br><br>actually, there would be no performance gain at all.<br><br>and little to no scavenging will occur since under boost there is a positive pressure in the exhaust manifold. If you are talking about creating a vacuum in the exhaust downstream of the turbo.....good luck!

 

But also remember our trucks still do need ALITTLE back pressure just for the turbo sake.

 

Our trucks want NO backpressure. That's why you can run straight pipe with no restriction and be just fine. I don't care bout performance gain. I just want the sound. ;D

 

[quote author=SuperiorDiesel03 link=board=7;threadid=15034;start=0#141160 date=1053656330]<br>But also remember our trucks still do need ALITTLE back pressure just for the turbo sake. <br>[/quote]<br><br>(In my best little kid voice)... Why?<br><br>Merrick Cummings Jr

 

Not true!!! NO motor needs back pressure. An engine is simply an air pump. Some motors designed with smaller ports (intake or exhaust) to give air velocity for low end torque but a positive charged motor doesnt deal with that. Back pressure only impeads the exhaust from escaping!?<br><br>As for Flowmaster, I have heard of guys running them but then again I have been told that the way the air flows from the turbo and the fact that turboed motors dont deal with exhaust pulses, the Flowmaster is not the choice for us. I also heard the same for dual exhaust but not sure about that.

 

Dart 440,<br><br>The others here have pretty much covered your question but I wanted to let you know that the muffler design (if you use one) is the key to getting good tone and volume without too much volume (some like it loud) and still getting good performance and lower EGT's. <br>One of the guys here was talking about a 4 inch into a dual 3 inch outllet and that's a no no in diesel exhaust, it will create enough back pressure to raise EGT's some and it's basically a small cork in the system overall. We are in ther final design of a true 4 inch turbo back system with dual 4 inch outlets from the muffler back. Daul 4 inch tailpipes with each one having a 5 inch rolled edge polished T-304 stainless steel tip. It's already built on the 2003 and in approx 3 weeks we will have it installed on a 1997 and a 2001 to see what changes we need to make on it to work on the 12 and 24 vavle trucks. It's extremely different looking and really makes the truck look and sound great. Plus you have no back pressure problems to contend with. If you go to our site we don't list the 12 vavle trucks but we have it with a hanger kit that does away with the tail pipe hanger that's at the end of the tailpipe on the 12 valve trucks, makes it lok much better without the hanger.<br><br><br>Mark<br>DPPI

 

[quote author=Mark Craig link=board=7;threadid=15034;start=0#141302 date=1053697700]
One of the guys here was talking about a 4 inch into a dual 3 inch outllet and that's a no no in diesel exhaust, it will create enough back pressure to raise EGT's some and it's basically a small cork in the system overall. [/quote]


Please explain your reasoning behind this. BTW, I already did some of the math for you.

Single 4&quot; area=12.57&quot;^2
Dual 3&quot; area=14.14&quot;^2

Note: I did not include fluid boundary layer width, and I am assuming that this is the reason you feel a dual 3&quot; restricts more than a single 4&quot;..this is also assuming perfect laminar flow, which we both know is not possible.

I am anxiously awaiting your answer. 8)

 

Actually, on the Ford modular engines (and maybe on other gassers), you need a little back pressure to keep your low end torque. If you lose all back pressure, you kill your bottom end.

 

[quote author=BigBlue link=board=7;threadid=15034;start=0#141334 date=1053701104]<br>Actually, on the Ford modular engines (and maybe on other gassers), you need a little back pressure to keep your low end torque. If you lose all back pressure, you kill your bottom end.[/quote]<br><br>Gas engines and diesels are two totally different worlds, you'll go alot further if you keep the two seperate. Also the difference between naturally aspirated and turboed. While some things may cross reference, some don't. Just keep that in mind for your future path.