Cast Iron Hedder for the "A"?

[Chris Haynes]

Is anybody still making the Cast Iron hedder for the "A"? Not a stock manifold but a free flowing hedder.
Thanks in advance.

[A440cuda1]

There are usually a couple on ebay, and I know Mac's advertises this one:
http://macsautoparts.com/model-a-exh...0R3CHL1109654/

[1931 flamingo]

Sacramento Vintage may also have it?
Paul in CT

[BRENT in 10-uh-C]

I'm pretty sure Dan Price is the manufacturer. ( http://www.dan4banger.com/ ) I will call him and make sure he has not sold the patterns/etc.

[john in illinois]

here are several types including cast iron. Charley Yapp also sells 2 piece Y header that performs well at Secrets of Speed/scalded dog.

LINK http://www.reds-headers.com/html/model_a_headers.html

John

[Jim Brierley]

Sponsored Links (Register now to hide all advertisements)

Steve Serr, the maker of the new Miller, makes one for his Miller head. The only difference is that his has 2 extra ears, one at each end, for extra studs. They can easily be cut off. [email protected]

[Chris Haynes]

Originally Posted by john in illinois

here are several types including cast iron. Charley Yapp also sells 2 piece Y header that performs well at Secrets of Speed/scalded dog.

LINK http://www.reds-headers.com/html/model_a_headers.html

John

Red's no longer sell them. Snyders has one that looks like it was made by Fred and Barney.

[Larry Seemann]

sent you a PM.

[max sr]

Max III at H & H carries the cast Iron Header ( 1-818-248-2347 ) and Sammy at Arizona Model A carries the header.
Thanks Max Sr.

[Bill O'Brien]

The stock manifold sure seems pretty free flowing. What is the improvement to going to a more free flowing manifold on the A ?

[BRENT in 10-uh-C]

Originally Posted by Bill O'Brien

The stock manifold sure seems pretty free flowing. What is the improvement to going to a more free flowing manifold on the A ?

Ummm, well it is a simple law of what goes in must come out. An engine is nothing more than a large air pump. If the spent gasses (exhaust) can flow out easier, then there is a slight scavenging effect that allows a new fuel charge to more easily enter the cylinder. This equals more efficiency which reverts to more power and better fuel economy. While it is much more complex in the real, ...that's it in a nutshell.

.

[just plain bill]

Originally Posted by BRENT in 10-uh-C

Ummm, well it is a simple law of what goes in must come out. An engine is nothing more than a large air pump. If the spent gasses (exhaust) can flow out easier, then there is a slight scavenging effect that allows a new fuel charge to more easily enter the cylinder. This equals more efficiency which reverts to more power and better fuel economy. While it is much more complex in the real, ...that's it in a nutshell.

.

Brent, do you know of any published dyno tests of the cast iron header?

[1931 flamingo]

Maybe n the soss website?
Paul in CT

[Bill O'Brien]

Originally Posted by BRENT in 10-uh-C

Ummm, well it is a simple law of what goes in must come out. An engine is nothing more than a large air pump. If the spent gasses (exhaust) can flow out easier, then there is a slight scavenging effect that allows a new fuel charge to more easily enter the cylinder. This equals more efficiency which reverts to more power and better fuel economy. While it is much more complex in the real, ...that's it in a nutshell.

.

I must admit that was very well said!!! But I already have an excellent understanding of how engines work and how to make then more efficient!

My question was, how much more free flowing is the cast header for the A? The stock exhaust manifold does not seem to have much restriction to it....

Any dyno numbers out there for comparison ?

[Bassman/NZ]

Unless you build a racing engine, you're going to get negligible real world gains from a header, regardless of whether its cast or tube. It's a simple fact that the stock manifold works well at the sort of revs the average street engine is turning. If you were doing a lot of running at 3000rpm+ then yeah, a header will be beneficial.
The hop up books of the 50s and 60s used to put headers at a 10% hp gain, but what they didn't tell you was that figure was only achieved in conjunction with cam, compression, porting and multiple carbs. Even then it's fairly optimistic.
JMO.

Oh yeah, I forgot the best bit.... headers LOOK very cool, and the tubing type will alter the exhaust note some. That's probably good enough reason for most folks.

[Jason in TX]

the stock manifold is a log, with the exhaust exit past #4 cylinder. The exhaust gasses have to trip over each cylinder to exit the manifold.



On a cast iron header, the exiting exhaust gases are isolated down their own path into a large collector. This may provide benefit to smoothing out the exiting exhaust gasses allowing for more efficiency.

[MrTube]

While your improving the exhaust system to be more free flowing why not rip out the choking suffocated flat head and throw in an engine with variable valve timing and 4 or 5 overhead valves per cylinder?

Sorry but it seems weird to me to try and improve how a flat head breaths. They don't breath well by nature, no?


Being that sounds a bit harsh, let it be known I appreciated modified "A"s just as much as stock ones. Nothing sounds nicer to me then a modified flathead!

[Chris Haynes]

Originally Posted by BRENT in 10-uh-C

I'm pretty sure Dan Price is the manufacturer. ( http://www.dan4banger.com/ ) I will call him and make sure he has not sold the patterns/etc.

Brent,
I looked on that web site and don't find any headers.

[Chris Haynes]

Originally Posted by MrTube

While your improving the exhaust system to be more free flowing why not rip out the choking suffocated flat head and throw in an engine with variable valve timing and 4 or 5 overhead valves per cylinder?

Sorry but it seems weird to me to try and improve how a flat head breaths. They don't breath well by nature, no?


Being that sounds a bit harsh, let it be known I appreciated modified "A"s just as much as stock ones. Nothing sounds nicer to me then a modified flathead!

I am improving the breathing by using the 3 valve set up by Riley. Now go outside and take a breath.

[Chris Haynes]

Who makes that cast header?