LSOHOLIC

So whats the deal with the new-ish GM 19201807 cylinder heads ??

Here is what I've found out about them;
LSX/L92 #19201807
• L92/LS3 port configuration
• Produces from 356-T6 Aluminum with 5/8” thick deck
• 6 Bolts per cylinder, Aluminum construction
• Runners are in “as cast” condition
• 250cc intake port and 80cc exhaust port
• 70cc Chamber size
• Intake flow = 280 CFM@.600 / Exh flow= 180 CFM@.700
• Assembled with 2.00” Intake and 1.555” Exhaust Valves
• Beehive springs
• 15 Degree valve angle
• 3.890” minimum bore size block
• Uses LS3 / L92 rocker arms
• Requires the LS3 / L92 intake manifold

Does anyone have real world experiance with them ?? Flowed on a 3.90 bench ?? Porting possibilities ?? And of course, comparisons to other popular small bore heads ??

Thanks.....

LSOHOLIC

A little more info;

Uses 11mm (10) and 8mm (13) head bolts (not included)
Accommodates production valvetrain components (except for Drag Race and Circle Track heads)
Includes premium beehive-type valve springs (except for Drag Race and Circle Track heads)
Extra material cast in the port areas to accommodate professional porting
Valve guides for 8mm valve stems
Racing-specific LSX-DR (Drag Racing) and LSX-CT (Circle Track) heads feature raised runner designs and other unique features designed to maximize performance at the track.

This is a link to the Tech section about these heads......
http://forums.corvetteforum.com/c5-t...nder-head.html

LSOHOLIC

Anybody ??

Does anyone have comparisons to the Mast head ??

Thanks......Maybe this belongs in the tech section ??