Let’s face it, the magic in GM LS Engines is in the cylinder heads. The rest of it is just so much stuff that consists of a bunch of metal that holds a crank, rods, and pistons. There is NO magic there. But the way that LS heads flow makes stupid power compared to a traditional small block head, and yet there are still gains to be made through aftermarket stuff. The new E-CNC LS3 heads from Edelbrock are said to make 20 hp more than the stock heads on a 500 hp combo, which is a truly steetable combo for an LS. These new LS3 heads are designed to work on 3.890 bore LS1 combos, and yet still flow great on big bore stuff as well.
With altered valve angles, and locations, as well as increase valve sizes they can support big power and flow 340 cfm thanks to a fully CNC ported 230 cc intake port. With 340 cfm these cylinder heads should support 650 horsepower naturally aspirated, or more. With boost, which all of you Pro Touring guys need to learn how to embrace by the way, these suckers will support horsepower numbers two to three times that depending on boost levels. And since these heads work with both 4 bolt and 6 bolt cylinder head mounting patterns, you can slap them on an LSX or aftermarket block that allows for extra cylinder head clamping. We like that. Boost likes more cylinder head clamping.
Here is all the info on these sucker from Edelbrock, and we’re going to see if we can score a set to test out on an LS build over at Westech and then see what they will support NA vs boosted. We’ll keep you posted.
New E-CNC Cylinder Heads For Chevrolet LS3 Engines
TORRANCE, CA (June 17, 2015) – Edelbrock has expanded their line of E-CNC cylinder heads to include an application for the popular Chevrolet LS3 engine.
Edelbrock E-CNC LS3 cylinder heads (#61319) feature altered valve angles and locations, spark plug location, and valve sizes along with all new high flow ports and chambers. The result is a versatile, high port velocity cylinder head that is an excellent choice for street or race LS1, LS2 and LS3 engines. Despite the geometric revisions, stock LS3 rocker arms and 69cc chamber size are retained. The Edelbrock E-CNC LS3 cylinder heads utilize a valve size and location, allowing it to fit within LS1 3.890” bore engines, but leaving it unshrouded on larger bore LS2 and LS3 engines. These cylinder heads are for use with both 4-bolt and 6-bolt per cylinder (LSX) engine blocks. In testing, these cylinder heads flowed 340 cfm, and outperformed the stock LS3 cylinder head by 20 hp on a 500+ hp engine.
Edelbrock E-CNC cylinder heads are fully CNC ported and feature premium valve train components throughout for long-term durability. Extra thick deck, interlocking valve seats, 0.100” longer than stock valves, factory angle milled deck, and extra thick port walls are some of the race inspired features that set this cylinder head apart from the competition.
Feature & Benefits
- Excellent choice for street or race LS3 engines or as an upgrade to LS2 and LS1 platforms
- 230cc intake port volume and 80cc exhaust port volume
- 2.135” intake valve with a 1.55” exhaust valve that is compatible with stock style rocker arms
- Can be used with both 4-bolt and 6-bolt (LSX) engine blocks
- These cylinder heads flowed 340 cfm and outperformed the stock LS3 cylinder head by 20 hp on a 500hp engine
For more information visit www.edelbrock.com
