4 valve Cleveland heads not 4 barrel

[monsterstang70]

This are about the most exotic heads that I seen. If I had the cash I would buy these heads. http://www.araoengineering.com/Ford/clevelnd.htm

 

[Route666]

oh my!

 

[Hack]

MMMMMMMM.

my toes are curling. Wow, wouldn't that be fun!!

 

[Max Power]

Doesn't look like those things will work under 5000 rpm...LOL!

It's not like clevelands had flow problems in the first place.....

 

[pabear89]

For the 5+ grand I think I'll do some work
on my Large hole heads.
If I was to drop that much in it it would be for a 6speed tranny.


PB

 

[my66coupe]

I am having difficult understanding how the added 2 valve per cylinder would open under the power of 1 cam? Care to explain?

Mike

 

[monsterstang70]

lol your guess is as good as mine, they didnt go in depth on how those head actually work wit the reg 351c block.

 

[Mach1steve]

Lottery Win

All I need is a Lottery win, and I'd be all over those puppies like a flies on &*#~.
:0
Mach1steve

www.muggziperformance.com

 

[D.Hearne]

I am having difficult understanding how the added 2 valve per cylinder would open under the power of 1 cam? Care to explain?

Mike

With forked rocker arms. Not a hard thing to do. The valve springs are also have less spring pressure each.

 

[my66coupe]

Interesting, thanks for clearing that up. I wonder why 4 valve heads arent popular with pushrod engines...

Mike

 

[D.Hearne]

Cost is the main reason.

 

[my66coupe]

Ya, the aftermarket ones. But why didnt Ford/Chevy etc develope a 4 valve cast head for pushrod engines and use them widely?

Mike

 

[D.Hearne]

Again, the reason there being cost.

 

[my66coupe]

With forked rocker arms. Not a hard thing to do. The valve springs are also have less spring pressure each.

Ok, I can see how a 4 valve head wouldnt be practical back then, but If the design was that simple, how bad would it hurt them financialy? Looking at a wide range of import 4 cylinders, many have a 4 valve head. My friends 2001 daewoo lanos, that he got for 3 grand, has a 4 valve head...lol

Mike

 

[D.Hearne]

When you're talking about cost per unit, and the unit's being numbered in hundreds of thousands, you can see why they didn't. Wasn't til the last 10-15 years that Ford came out with limited production DOHC heads and this was probably caused by competition from other manufacturers.

 

[my66coupe]

I see, back in the 60s was a 4 valve head unheard of? This is the first 4 valve head ive seen for a pushrod engine...

Mike

 

[Max Power]

4 valve heads main benefits are more balanced flow, and lighter valvetrain components for higher redlines. Neither benefit outweighed the cost in the old days, and arguably, isn't necessary now. Works for motorcycles and race cars, but for commuter transportation, not so much.

 

[wildstang]

It also looks like it adds quite a bit of width the the top of the block, not good for our old shock tower stangs. In their website I did not see any good front pictures or any width dimensions.

 

[67CoupeDriva]

I'm just curious as to why someone would develop them for the Cleveland, which as has been pointed out flowed well anyway, instead of the Windsor. Seems like the W heads would have a much larger market these days, especially if they remained compatible with the 302. Man the short stroke engines would be absolute screamers with those heads, if you built the bottom end to handle 10,000 RPM.

 

[CochinoFilipino]

They make Windsor heads too http://www.araoengineering.com/Ford/frdsmb.htm