According to the website:

-Intake port flow is 405CFM @ .600” lift
-The intake ports are standard LS-7
-There is a huge gain in Horsepower over a 2 valve head. To the tune of 100HP more using the same induction, exhaust, cam etc.
_The heads come with everything necessary to convert to 32v. Pair heads fully assembled, pair valve covers, rocker assembly and shafts. $7499.00

A lot of money, but if you were looking for a unique powerplant.............

http://araoengineering.com/LSX.htm

 

I will rephrase (you are correct) . Even though its aluminum billet there is a lot of unneeded weight there. There is more spring pressure at the pushrod tip of the rocker so it has to be large and bulky to handle the stress. I would be very hesitant to run an engine up to the 6500 rpms that a lot of people here do for any length of time (day to day driving) with a lead foot.
The idea is great, its just my opinion there is a lot of complication in that design while the two valve heads for these engines flow really well without the "exotic" engineering.
This engine was designed for two valves. When I was younger (1980 or so) I can remember aftermarket heads for the small block that had 4 valves per cylinder. Not much amounted to it. I am all for innovation but I would like to see them on a test mule.

JMHO

 

i would think you would get more power out of a set of L92's

 

Especially for the money! Take and dump a grand into a set of L92's and I'm sure you would have a way better set of heads with cash left over!

 

Very true, but look at these heads... They are monsters compared to a stock casting, so really the valvetrain itself may be lighter but you gaining a ton of weight with these heads.

 

Even though they claim 400 cfm intake flow, that is not the point of 4 valves per cylinder. The main benefits are 1. low lift flow, which will be way better than two valves, and 2. combustion chamber shape, which is almost ideal with 4 valves. I don't think 100 HP gain is unreasonable.

 

for all that effort, why didnt they just make them OHC? :scratch:

 

blasphemy!!

haha..

 

Meh........