Technical Have Y'all Seen the New Trick Flow Aluminum Double Hump Heads?

Should be out next year.
http://www.hotrod.com/articles/smal...6913933AD782318885ADC520484822000CC7C5D4A95E1

 

Is nothing sacred!

I'm confused about the following statement also:
"On the outside, the heads have the original double hump stampings and styling with drilled accessory holes and straight plugs for the nostalgia look. "

The "nostalgia look" died in 1969 when those accessory castings came on scene.

All the Chevy orange paint in the world won't hide this charade.

 

Looks like they are making then in the late camel hump...1968 style similar to the small block head with casting number 3917291 with the temperature sender on the side...the other style is 1969 1970 style double hump symbol marking like a casting number 3927186 head. it's cool I suppose....originals are still really cheap out here. I can find them all day long for $100 a pair. Small block heads are pretty light...I know the aluminum ones will be lighter and have bigger valves...runners..etc. I wonder how much they'll be?

 

These will look good painted orange!

 

I interpreted these as being one casting that addresses both eras.
I own a pair of NOS "291" heads you mentioned, the GM box was printed "initial 68 stock". They have late 67 casting dates and yes they have the temp sender hole.
They do not have the accessory bolt holes as the "186" style castings.

 

The "291" head was the first one to use the sending unit on the side. Makes them easy to spot at a swap meet...you're right... they started using them mid 1967...and all of 1968 production. Incidentally 1968 and 1969 was the year when they went from short water pump and associated bracketry to long water pump. Corvette kept the short water pump setup though..

 

Those don't even look like a Chevrolet head. Are you sure they aren't plastic ?

 

Looks like a CAD image to me...

 

That's the question I have... if I have pay 5k to get some heads together that do not look old enough to make the car period consistent, I will use a Brodix and stomp the life out of these in the flow dept....its just silly....but then again..

 

.......now if someone would bring back the M22 for under $1000

 

it is a cad model screen shot.......graphics look like pro e ... or solid edge

 

Heck even a new M21 for under a $1000 would be a home run.
Better yet if it was made in the U.S.A.!
KK

 

A rendering for sure, but interesting enough. Any idea what they'll go for?

 

Looks like the "new" old heads will be like the reproduction Corvette ram horn exhaust manifolds, they look "kinda" like the originals but they'll only fool the unwashed masses. Hopefully the finished product looks better.
Overall flow numbers notwithstanding, being aluminum with updated combustion chambers should make some nice street heads allowing a little more compression. Maybe they will make a street version and a big port version if they sell.

 

I'm not real sure that there is a real NEED for old looking , modern flowing heads. Since the advent of aluminum heads, and iron aftermarket heads, Chevrolet builds of any competitive performance have abandoned the factory iron offerings, as even ported to the max, the factory castings can't match the aftermarket flow rates for the same dollar amount. Most cylinder head shops have a small stockpile of early "double-hump" cores, so if you're building an authentic restoration, you can get the real thing. If you're going racing to be competitive, any pragmatic builder will use the best aftermarket pieces he can afford and not care about those casting details.
Same goes for factory blocks, leave the factory stuff for street cars, the aftermarket component is so much better. There is pretty much NO factory, or factory looking parts used in most every professional class of motorsports these days. No need to reinvent the wheel, new wheels are available.

 

A solution looking for a problem.

 

In the big picture there is no need for any of this stuff we are interested in. In my case however, I try to keep my cars looking somewhat period correct, at first glance anyway, and a internally modern/externally old cylinder head is right up my alley. I'm building a '56 Chevy in an early '60s style with a 350 dressed like a 340 hp 327. Not a race car or a smoking 750hp pro-tourer or anything, just a clean car that may go to the drags once in a while.
BTW Spike, thanks for your efforts saving some classic flatbottoms. It takes a lot of work and dedication finding and restoring those great old boats.

 

dunno that it matters what they look like if they work better than what's available now? if they were externally identical I spose you could put them on restored cars??????????

 

Being a old street racer where you hide what you have , I have spent time in making it look like stock parts as much as I can , grinding ,filling hoes , change head symbols ,
( jb weld )sand blasting , cut cast iron exhaust manifold But a real car guy can spot certain things , I had one motor that looked & said 262 ,Go as far to drill bolck to hide NOS under intake ,, It's a Game

 

[QUOTE Same goes for factory blocks, leave the factory stuff for street cars, the aftermarket component is so much better. There is pretty much NO factory, or factory looking parts used in most every professional class of motorsports these days. No need to reinvent the wheel, new wheels are available.

oposing view....Well Super stock racers may really l;ike these if they're legal....

 

Awesome analogy!

 

There use would depend a lot on price. If you can get them for around the same money as the flat ended aftermarket you see all over I would run them first at least they look like pre 86 heads at a glance

 

If they cost the same as a comparable flowing aftermarket head, I'm game. I'm not gonna pay extra for a pseudo double hump.

As much as I like traditional, I use the best heads I can afford, regardless of originality, era, etc.

 

I like these, however you can fab those little humps up on the front of any aluminum head you choose . I would not want to pay extra for the humps, if that is the case in pricing.

 

Mikey wont pay for humps... now thats funny...lolo

 

Or steel.
Remember the guy from ? Germany? that wanted to do that very thing with some old powerpack heads.

 

sounds like they will be a good item for a big bucks ride that sorta looks nostalgic - but, they do not belong here.

 

Thanks.

I work in a rapid prototyping lab, where we could make just about anything.

It is my job to pass out pins to other engineers, that they may pop their own bubbles.

 

175cc intake port? 250cfm? Meh....