Aftermarket Hemi Heads for LS1
 

Just found these pics of some Hemi heads now being made for the LS1. Awesome!!

http://www.bpeheads.com/LS%20Hemi.jpg

http://i128.photobucket.com/albums/p...5x/photo-3.jpg

So how long before you have a set Mike.

Oh Wow, that would be fantastic with your intake Mike.

Probably a bit too rich for me. I just reckon they are cool though.

Cheers

How much do you think they would be Mike?

Looks like it is going in a MINI!

No idea. I'm still trying to find out more about them.

They are made by Nick Arias who was famous for making hemi head conversions for the Big Block chev back in the day.
http://www.nickariasjr.com/homepage.html

No info on their site about the LS1 heads but worth keeping an eye on it. They list a complete head kit for the BB Chev and it's $10,760 so I cant imagine the LS1 kit is cheap.

Cheers

Hemi head ?
 

Hemi head ??...........how about trying a canted valve pent roof !:JEKYLHYDE

Its not really a hemi in the classic sense, but I'm sure its better than stock-but a true Hemi...doubtfull
Rog246**)

So, take a light compact engine with excellent heads out of the box and turn it into a giant, heavy engine with probably better heads but how much better?

The LSx can kick out some wicked power without the hemi heads, other than looking the part whats the point?

after knowing Nick for so many years, he is really probably planning on cutting one half off the LS , putting the hemi head on it and running it in a Midget

Hi Mike
 

Do you have any similar Pics of a stock head, for comparison?? I've never seen an LS motor naked! Peter.

Peter,

Google is your friend. Type LS1 head or LS2 head into Google and sit back. Not so much on L98.

Cheers

Not sure if this will help, but here is a picture of my LS1 during its re ring and new gasket build.
http://www.clubcobra.com/photopost/d..._installed.JPG

I believe the L76/L98/LS3 heads are all taken from the L92 and if that's correct, pictures are a bit easier to come by...

http://i85.photobucket.com/albums/k8...L92Heads_1.jpg

http://i252.photobucket.com/albums/h...landZoo111.jpg

http://i85.photobucket.com/albums/k8...L92Heads_8.jpg

http://i305.photobucket.com/albums/n...uild/heads.jpg

http://i85.photobucket.com/albums/k8...L92Heads_6.jpg

Sambo

Thanks Guys, the original LSx has not changed much since I started playing with my Morris 1100 and 186 HT Holden years ago!! The hemi is a totally different arrangement however, (hence the cost no doubt)!

The Hemi head design has been around for a long time. I think Chrysler produced it's first Hemi Head V8 in the 1951.

Hemi is short for Hemispherical meaning a domed shaped combustion chamber with a central plug and valves on either side of the chamber canted towards each other. The idea was to allow the fitment of larger valves and to promote flow into the chamber. They really need a matching domed top piston to make them work.

The standard LS1 head design is what's known as a Wedge design. The combustion chamber is sloped up towards the spark plug. This design has become very efficient over the years. The wedge shaped combustion chamber has good squish meaning as the piston rises to TDC the wedge shape of the chamber forces the mixture up around the spark plug.

The Valves in line actually produce swirl which aids cylinder filling. The intake charge flows in and is then deflected off the side of cylinder wall and swirls in and down as the piston drops. You can kind of see this effect when filling a bucket with a hose. directing the hose straight at the side of the bucket cause a lot of the water to splash back out of the bucket but directing it to one side at an angle makes the water swirl in keeping more of the water in the bucket. This swirl effect continues on the power stroke as the piston goes down giving a more complete burn. As the piston comes back up the swirl continues helping the exhaust gas exit the cylinder. Think of it as how water swirls down the plug hole in the bath.

That's the theory as I understand it.

The Wedge head has taken over as the design of choice for push rod engines because it's simpler to manufacture, and more compact. It allows the use of flat top pistons and produces great results for everyday driving. The Hemi head really only comes into it's own at high RPM where the greater flow from the larger valves helps.

Cheers

I dont care how they perform, they just look so damn good.
:)

Nice explanation there Mike....... did you say you had some for me to try on the Dragster??? Space is not a problem :LOL:

I was thinking the same thing. I'm slowly collecting parts for a Front Engine Dragster. I reckon a set of those heads would look awesome on it.

I don't reckon you need them. Gave tells me you ran a 9.36 1/4 the other day. Congratulations!

I picked up a set of front wheels for the FED project the other day. I think they are the same Cragar Supertricks as you have on your rail.

http://www.clubcobra.com/photopost/d...m/IMG00024.jpg

These wheels were first produced in about 1971 so they should still fit in with the nostalgia style. They have been powder coated red but I'll strip it back and polish them.

Cheers

Just found this little Vid of Bobby in his first proper comp in the new LS1 powered dragster. He won the meet too with an 80,000KM+ 2nd hand LS1 motor with a cam in it. How good does that motor sound! Way to go Bobby!:3DSMILE::3DSMILE: