6-3-1

[crazycasey]

Hey...mind was racing last night...remember the old tri y headers on Ford's? They flowed better than cast manifolds, but made more torque than 4 into 1 headers. What if somebody did an equal length 6 into 3 into 1 header for the mopar flat six. You could run a single exhaust and probably still have the flow of a split header like a Fenton, but maybe more torque. I'd be willing to bet that it'd probably sound pretty wicked too. Anybody have any thoughts?

[No Bux Rod]

Casey,

I have read somewhere that dual 3:1 (6:2:1) headers work better on sixes with the Mopar firing order. You group every other cylinder in the firing order to 3:1 collectors, thats 1,2,3 and 4,5,6. not sure where the article is on the header choices but our friend Google should be able to help.

I have design for equal length 6:2:1 headers with about 39 or 40" primaries for the long block. The design uses standard mandrel bends cut to various angles like 45, 90 and 135 degrees. I have not built these yet.

N B R

[Bodacious]

The firing order, as you know, is 153624. When you take that into consideration, exhaust pulsing isn't too bad as is, assuming dual headers on the first and the last three cylinders. Taking it another step, I've toyed with the idea of two into three (collector) headers and other combinations. What you do after the collectors is of little relevance, assuming a good dual or even a large enough single system.

What I don't like is the lack of a true long tube header for these. So I'll likely make my own. Given that these are low RPM torque engines to begin with, I'd hate to leave low and mid-range torque on the table by using the shorty tube headers available. Or worse yet, just using split manifolds.

[Normspeed]

I'd like to see how those turn out. You need to kick the front pipes outward to get clear of the oil pump. I guess you could say mine is a primitive 6:2:1. It goes ino a small Flowmaster that is supposed to have a scavenging effect. I couldn't say what it all does for performance but it sure sounds good.

edit: check these chrome equal length headers.

[Andydodge]

All those headers ideas look god until you have to fit them around a RHD steering column and box.......you know that space between the oil and fuel pumps?..........lol......thats were the RHD steering box lives, with the column running up from there.....have thought of using just the rear headers from Langdons..........and run the front three somewhere else.........lol............andyd

[Guest rockabillybassman]

Same thing here Andy. I've contemplated removing the inspection plate on the inner fender, the one you remove to adjust the tappets, and running headers out there, but it's tight whichever way you do it.

[Grandadeo]

While you are talking exhaust. Wondered if anyone is running straight pipes (no mufflers) with there split exhaust systems on their 6. Some guys over on the Ford Barn love them on the Flathead V8's. Others run Smittys or Brockman steelpacs. Just starting to think about playing with the Belvedere's intake and exhaust and trying to work up a game plan.

Lee

[crazycasey]

I was thinking about it...not sure if you would want to have some backpressure though (from some sort of muffler). I had it running on the lift with straight pipes and it wasn't very loud. My Falcon stroker motor is louder through mufflers.

[38plymouth]

I'm running short glasspack looking mufflers on my dual system. It's still fairly quiet at idle but sounds good cruising and downshifting. I drove it to the muffler shop with just a split manifold and no pipes, that was loud. I almost went with straight pipes but chickened out.

[Normspeed]

Some of the local "bombs" run dual straight pipes, small diameter. They really rap when you give them some RPMs. Those are mostly on Chevy sixes. I've also heard that some will run a single straight pipe and a single glass pack pipe for another sound. Good thing is, if you start with nothing but pipe front to back, it's not a big problem to add mufflers later.

[blueskies]

How 'bout these bad boys... (hit reload...)

Pete

[Heavy Flat Head]

Pete,

Those are sharp, have you tried them yet? Where can I get a set?

I still have a couple of kids I can mortage.

Ed.

[blueskies]

Pete,

Those are sharp, have you tried them yet? Where can I get a set?

I still have a couple of kids I can mortage.

Ed.

Can't remember who now, but someone here on the forum has these pipes. They came from www.exhaustedbyphillips.com

In 2003, they were $750 a set for mild steel... Or, close to a grand with HPC or other ceramic coating. I went for Langdon's version, for less than half. If I were to do it again, I'd get the Langdon cast iron headers instead.

Pete

[Heavy Flat Head]

Looks like I need to raise more kids so I can mortage them.

I most be nuts.

Ed.