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Cylinder Head Testing - LS2 Dyno Thrash Part II: Head Shootout

Cylinder Heads Graph
The Edelbrock head equipped... 
   
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Cylinder Heads Graph
The Edelbrock head equipped LS2 on the Livernois Motorsports engine dyno.
Cylinder Heads
The Edelbrock head is a great... 
   
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Cylinder Heads
The Edelbrock head is a great example of what a big company can do with a production piece...
Cylinder Heads
...We found the Edelbrock... 
   
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Cylinder Heads
...We found the Edelbrock to offer up excellent performance on the engine dyno...
Cylinder Heads
...The Edelbrock was also... 
   
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Cylinder Heads
...The Edelbrock was also the heaviest head in the group suggesting that they would take quite a beating when used with a forced induction application.
Edelbrock
NameEdelbrock Lingenfelter Edition LS1 CNC
PN61969
Price$2,399.99
Combustion Chamber size65cc
Intake Port Size202cc
Valve Sizes (intake/exhaust)2.02/1.57 inches
Horsepower at 3,000 rpm236.5
Torque at 3,000 rpm414.1
Peak Horsepower535.9 @ 6,700 rpm
Peak Torque479.6 @ 4,900 rpm
Special Notes
The AFR, Dart, Edelbrock, and Livernois cleared the valve cover baffle without modification. The Edelbrock heads appeared to be untouched after they were CNC'd. The Edelbrock heads physically seemed to have the most material and were heavier than the rest.

EngSpd RpmSTPTrq Clb-ftSTPPwr CHp Fuel A lb/hrFuel B lb/hrA/F Ratio Air 1 scfm BSFC lb/hph
2,700410.32115.891.1000.4840
2,800412219.65.897.2000.4940
2,900409.5226.15.899.9000.4920
3,000414.1236.55.8100.2000.4730
3,100415.12455.8102.7000.4660
3,200411.5250.85.8108.8000.4820
3,300414.7260.65.7113000.480
3,400412.7267.25.7112.9000.4680
3,500409.72735.7112.2000.4560
3,600405.2277.75.7113.9000.4550
3,700407.7287.35.7116.7000.450
3,800407.9295.14.8120.5000.4480
3,900415.2308.34.5124.9000.4430
4,000424.9323.64.5130.7000.4410
4,100435.7340.14.5138.9000.4450
4,200440.9352.64.5143.1000.4410
4,300453.7371.54.5147.9000.4330
4,400455.3381.44.5151.9000.4320
4,500464.1397.74.5159.5000.4350
4,600462.6405.24.5161.7000.4330
4,700467.8418.62.8166.1000.4260
4,800472.4431.82.7173.4000.430
4,900479.6447.52.7183.7000.4390
5,000478.6455.72.7186.2000.4370
5,100475.6461.92.7194.3000.4490
5,200475.2470.52.7198.7000.4510
5,300477.2481.62.7202.7000.4490
5,400474.8488.12.7211.6000.4620
5,500472.3494.62.7216000.4660
5,600467.3498.22.7214.4000.460
5,700470.3510.50221.4000.4580
5,800461.2509.30220.9000.4580
5,900458.7515.30222.9000.4560
6,000454.2518.90226.1000.460
6,100451.2524.10.9228.2000.4620
6,200445.7526.12.3227.8000.4620
6,300439.1526.72.3229.7000.4650
6,400432.6527.12.3236.2000.4780
6,500426527.22.3239.6000.4850
6,600421.4529.62.3238.1000.480
6,700420.1535.92.3239.1000.4770
6,800411.5532.72.3241.3000.4840
6,900405.4532.60249.2000.4950
7,000390.7520.70237.5000.4830
7,100378.6511.80244000.5050
7,200384.3526.90241.9000.4860
*Range: 2,700 - 4,200 RPM
3,450415.4273.45.4114.2000.4640
2,7002114.591.192.3000.4410
4,200440.9352.65.8143.1000.4940


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