The Stovebolt Site Forums The Shop Area Engine Shop Looking for ideas;Exhaust

I have a set of Hedman headers for the 250 in my '64.
The size of the ball style collectors is 2 1/2".
The reducers that came with the header set have a 2" O.D.
Everything needs to be fabricated, so I've got an opportunity to configure it however I wish at this point.

What have other people done? What kind of results?

CJ

I'm thinking about what I'll be doing to mine when I put the 292 in it.

If you have two collectors, definitely use an X or crossover pipe. I believe that will improve both sound and performance.

I plan to use 2 1/2 inch pipe for the whole system.

There is a muffler, I think its a Flowmaster, that has an internal X crossover. I'd like to use that with another muffler on each rear pipe. (I like quiet power.)

To keep it simple I plan to have the outlets, with slight downturn, just in front of the rear wheels.

Exactly! So you plan to run a Resonator after the crossover muffler?

I've been looking for a dual inlet, single outlet muffler to feed a single resonator.
My application retains a 1bbl, and with my small displacement shouldn't require a large diameter tail pipe.

All the dual inlet single outlet mufflers I've been finding have humongous outlets, which shouldn't be necessary once the exhaust stream heads for the Resonator. To keep velocity up, (to dry the system on short trips,) I'd like to get down to something like a 1 7/8" tailpipe.

Make sense?

CJ

I have run many combinations over the years. I find that it is more a matter of the kind of sound you prefer. If the pipes are larger 2 1/2 to 3", you get a very low rumble, as the diameter is reduced, the tone changes to a higher tone.
I don't have an X type crossover, I have always used a piece directly across the two pipes just back of the connection to the headers. I keep promising myself that I will make the next exhaust system with a bolt up flange between the two sides, but I can honestly state that I have never had a situation where it was important to remove only one side, so I keep putting it off.
For your application, 1 7/8' is very reasonable.
Bob


Nowadays, I prefer to use the resonator/ turbo muffler setup because it is efficient and mellow.

I would use 2" pipes with long glasspacks. You get a deep mellow tone without a lot of noise. I like them straight out the back with 2 1/4 angle tips.