That could be. I think the poly has exhaust, intake,E,I,E,I,E,I and the LA has E,I,I,E,E,I,I,E
A new head design (fantasy)
- Thread starter Cudafever
- Start date
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Learned something new Rusty. Boy that would screw with the port flow!
There was a guy in the southern states area that developed a small block LA Hemi head. His pricing was ridiculous. IIRC, they were 15K for the pair.I am waiting for small block Hemi heads.
Using mathematic formulas, you could figure out just how much space the pushrod tube would take up. I'm not sure if doing this would allow any bigger port than anything the aftermarket already offers, including all of the "W" series stuff. It would be interesting to find out.
yellow rose
Overnight Sensation
Once you get there, you have a big, round obstruction right on the middle of the port. And since pushrods are now getting up to 9/16 how much port displacement is that?
It's a bit harder to develop something that it looks like. Everything is in the way. And if you move it, it puts something else in the way.
It will eat you up. Like the guys who think a 4 valve head is the do all, be all, end all and try and fit that junk on anything.
I'm pretty green so go easy on me lol. In a perfect world it should follow the short turn and enter the cylinder on the ssr side of the valve correct? The roof and the floor ideally should be one column of air entering the cylinder. I can't get the image of 2 columns or more seperate airflow, outta my head. One for the roof, one for the floor or maybe a couple for each. Each one flowing a little different speed, moving different volumes of air. This is in regards to the speedmaster heads. The more gradual the short side radius the smoother the flow should be without shooting across the valve and shearing the upper column of air on the long side. Could be way off but the big problem aside from the prp is there is not enough meat in the ssr and maybe the floor is too low to get where we need to be? Kinda rambling here. It's entirely possible that I missed the point and started blabbing about what I feel the issue is lol.
Pontiac actually did it using the heads on the Ram Air V stuff. But that never made production.
this may be a little deep right now. Disregard my post and we can go here later. Back to offset rockers.
I have now problem with this thread going off the tracks. aspeialy for a good brain teaser like this!!!!
All though i haven't though about it much. a pipe has the fastest speed and volume down the center of the pipe. so a cyl should react the same. there for the hardes pull should be on the short side......................
I have lots of questions and ideas but I'm gonna wait for PBR. The less I post, the less he has to correct me lol
I think some of the present aftermarket Pontiac heads still use the pushrod through the intake port, so they must have found benefit to it.
Yeah. Scroll down past the Pontiac Hemi heads and you'll see their version of the Ram Air V which still has the pushrod going through the intake port. Look at the size of the port, though. LOL
Kauffman Racing Equipment
Kauffman Racing Equipment
For now don’t worry about the top or bottom of the shortside. To get a good flowing head you have to widen the shortside so think far right and far left and where each side relates to an engine block. And why proper shaping in these areas is so important.
yellow rose
Overnight Sensation
And never forget...EVER...especially if you are grinding on iron heads there is water back there.
If you are serious about this stuff, make sure you sonic test all those areas. BTDT.
That's why the heads I'm running now are a bit low on flow. I'd already found some water on the final, finish work. Had to start completely over.
gzig5
Well-Known Member
Overhead cams would take care of the pushrod pinch. Just saying....
Phreakish
Well-Known Member
And finger follower ohc setups can Rev to the moon while remaining stable.
Chrysler had a good ohc follower setup in the 2.2/2.5 and 2.0/2.4 engines. Recycling them into a v8 head could be fun.
My experimental factory iron head has found the water on the ssr the water in the bowl. hell i have even found oil
MOPAROFFICIAL
If it has tits, it's a liabilititty.
Thought of that, years ago and typed it here.
O rings and push rod tubes. Nah. With that you automatically have to expect a negative.
Lol
just make everything taller, add a half inch to the intake port, valves, new intake manifold...and maybe headers, or a extended flange.
MOPAROFFICIAL
If it has tits, it's a liabilititty.
Fe, same
yellow rose
Overnight Sensation
And bring on a multitude of other issues. I don't think many people know why the Europeans (the east Asians have other reasons but some are similar) are so in love with small displacement engines.
TAXES. That's the number one reason why they love their small displacement junk. TAXES. They are taxed on displacement. The bigger the engine, the bigger the taxes.
The smaller the engine, the harder it is to get a single valve with enough area so they use multiple valves, and because everything is small, they use overhead cams becuse of space.
I've never been impressed with OHC stuff, and before anyone asks, yes, I'm aware of F1 and all the 4 stroke dirt bike junk that the media harped on for years about how they all use "F1" technology when a 2 stoke of equal displacement will kill a 4 stroke.
gzig5
Well-Known Member
Well, I've been impressed with OHC for a long time. No such thing as valve train stability issues. I've owned a 2000 BMW M5 for ten years. That comes with a 400hp 5 liter, all aluminum DOHC, four valve per cylinder V8. Essentially the Ford Coyote was modeled after it, in my opinion. The exhaust is very restrictive and a set of headers and tune is worth almost 50hp. That motor is a work of art and is more than twenty years old now. Way ahead of everything else at the time. Overhead cams and variable valve timing allow you to do things that a pushrod engine only dream of. A lot of it is aimed at efficiency and fuel economy of course, but you can make some serious power. Multiple valves allow more area for flow in a given chamber area, rather than a single big valve with a lot of wasted space around it. Biggest downside with the BMW motor is the engine controller is locked up and figuring out the variable cam timing in a standalone controller is like black magic. A lot harder for a backyard hot rodder to tinker with, but the system is capable. Kinda looks like a hemi.
Thanks, Pa
Thanks, Pa. fells.
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