Perhaps less my age and more about my Pop.  He never had a car with a flat head engine after I was born.  (By the way, my dad was born in 1911.  And he was 50 when I was born.)  Practically all of the flat heads I have ever owned and worked on were made by Briggs and Stratton.

See? You can do it Bobby! Looks real nice.

Are you including any sort of crossover in your dual system?

Rufus68 wrote:

Are you including any sort of crossover in your dual system?

 
No I'm not adding any crossover.

Rufus68 wrote:

RTM wrote:

Rufus68 wrote:

Are you including any sort of crossover in your dual system?

 
No I'm not adding any crossover.

I was just curious.  I have only changed the mufflers in the exhaust system that was on my mustang when I bought it in 2013.  It does not include a crossover either.  I only asked because of how often it is recommended to include a crossover.

 
An X pipe will change the sound greatly and be a little more raspy sounding.   To me the X pipe kills the old school rumble.  The H pipe doesn't kill the rumble as much as an X pipe but still affects it.  With each side on its own you get more of that rumble which is what I'm after.  Plus I don't think I would ever notice the difference in performance.   I'm already at a 500-550hp set up. 

I'm some of my previous posts I've said a few times I'm all about big sounding cams, even on a street driven mustang.

I put the hf bucket inside the home Depot bucket!

Crossover pipe

Best reason to install one is it makes the system rigid, so it cannot rock side to side.  This makes header gaskets last a whole lot longer because they are not being constantly used as a hinge point as the exhaust pipes rock back and forth.

MS wrote:

Crossover pipe

Best reason to install one is it makes the system rigid, so it cannot rock side to side. This makes header gaskets last a whole lot longer because they are not being constantly used as a hinge point as the exhaust pipes rock back and forth.

Somewhere along the line a bracket was added to the production 200's that attached to the engine block and the downpipe, just below the junction between the manifold and the downpipe.  It forced the downpipe to move with the engine so there was very little movement required at the donut gasket between the manifold and the downpipe.  When I was working up the exhaust for the 250 I found that the bracket used on the 200 didn't fit properly (well, duh) and so had to fabricate one that did work.

It was a HUGE issue on my K5.  Now, in fairness that system probably didn't really have enough hangers, but my thoughts are why take the risk?  A crossover is stupid easy to add, and properly located isn't in the way of anything.  Typically I design a system now so I can remove the H or X pipe without having to tough the system from there back, which makes pulling the trans a lot easier.

The only upside I ever noticed to not running one was that it makes the car sound like its got more cam than it does. 

Back in High school there was no such thing as X or H exhausts. It made it a lot easier to find a blown head gasket that way.

HEY........Ya forgot the EXHAUST DUMPS/cut-outs !!
VERY nice work for laying flat-of-your-back !!! 
6sally6

Which mufflers did you end up buying?

rpm wrote:

Which mufflers did you end up buying?

 
Dynomax race bullets.  It was one of the very first mufflers I liked.    I've listened to so many and kept going back and forth on what I wanted.  Hope they sound like what I want.   

I think I can attach the hangers to the cross brace where the rear shocks would normally be.   It's thicker metal so it should be better than the floor where I would need to reinforce it.