3-1 Exhaust header question

[TemeculaTim]

I have a header that has the 2-3 into 1 outlets. Has anyone ever done a dual exhaust system and not tie them both back together through a single system?

I am considering the cons - the extra pipe, muffler, and clearance issues. But belive the 55's length will make it easier to do.

I am planning on building a high performance 2F for my 55, with an emphasis on maximizing the most efficiency for fuel economy ( yeah right ) and thought the less restrictive exhaust may improve horsepower and ....................it should sound really cool.

Any thoughts?


Thanks,

Tim

 

[PhrogsPhorever]

I have a header that has the 2-3 into 1 outlets. Has anyone ever done a dual exhaust system and not tie them both back together through a single system?

I am considering the cons - the extra pipe, muffler, and clearance issues. But belive the 55's length will make it easier to do.

I am planning on building a high performance 2F for my 55, with an emphasis on maximizing the most efficiency for fuel economy ( yeah right ) and thought the less restrictive exhaust may improve horsepower and ....................it should sound really cool.

Any thoughts?


Thanks,

Tim

Pics.

Who made the header? Is it the MAF 3 into 1 x 2 headers or is it a custom setup? If it is the MAF headers, then you can get the 2 into 1 pipe morphing to a 2.5" tailpipe

Pipes lookie like this?

 

[TemeculaTim]

Pics.

Who made the header? Is it the MAF 3 into 1 x 2 headers or is it a custom setup? If it is the MAF headers, then you can get the 2 into 1 pipe morphing to a 2.5" tailpipe

Pipes lookie like this?

View attachment 220555

It's not the MAF, but similar in the fact that it takes 3- into 1. I am aware of the connecting tube, but was wondering if any gains would be had by a dual exhaust system. I am at work so no pict available ---yet.

BTW- Nice looking engine.

 

[Fast Eddy]

Yup. My rig had dual 3-into-1 and true dual 2" exhaust all the way back. Each pipe had two cherry bomb glasspack mufflers. It will sound like a 240z, or so. When I went back to stock to pass smog, I just used one of the two pipes.

Don't expect a lot of (any?) extra performance unless you change the cam, shave down the head for some extra compression and have JimC work his magic on your carb.

 

[joeyg1973]

If you want to run dual exhaust for show that is fine, but it will not improve performance if you don't connect the 2 pipes as close as possible to the engine. You will have 2 pistons not getting the full benefits of the scavenging effect and this will affect performance. Scavenging exhaust to pull out the exhaust is the reason why people put in H pipes or X pipes in engines with separate piston banks.

 

[Degnol]

I do also believe that too free-flowing an exhaust will diminish low-end torque.
For sound.....++++ for the performance as an offroad vehicle -------

Low-end grunt and gears gets it on the trail. IMHO

Ed

 

[joeyg1973]

I do also believe that too free-flowing an exhaust will diminish low-end torque.
For sound.....++++ for the performance as an offroad vehicle -------

Low-end grunt and gears gets it on the trail. IMHO

Ed

"Horsepower sells cars, torque wins races" - Carroll Shelby

 

[TemeculaTim]

If you want to run dual exhaust for show that is fine, but it will not improve performance if you don't connect the 2 pipes as close as possible to the engine. You will have 2 pistons not getting the full benefits of the scavenging effect and this will affect performance. Scavenging exhaust to pull out the exhaust is the reason why people put in H pipes or X pipes in engines with separate piston banks.

My true aim is maximizing performance, and your response is almost word for word what I was told this morning discussing this with someone who makes his living building high performance engines.

Thanks Joey

 

[MadTripper]

I picked my 74 up with hooker "Super Competition" headers running dual all the way back. Here is a quick pic where you can see the actual muffler layout but not all that clear. The second is just the tag on my headers.

Tripper