Summit racing ls3 hyroolic cam cnc ported cylinder heads

#Summit racing ls3 hyroolic cam cnc ported cylinder heads pro#

It should not be overlooked that our test motor produced nearly 700 hp with those OE, as-cast cylinder heads. That obviously added power, but the Mast heads also offered the highest airflow, so let the controversy begin. CNC-ported stock castings from various manufacturers, and a baseline test of stock LS3 heads.

All the heads were run with stock LS3 rockers with one exception: The 12-degree, large-bore Mast heads required 1.8:1 LS7 rockers. Jetting and timing were adjusted for each setup, but every combination produced best power with 28 degrees of total timing. All combinations were run with American Racing 17/8-inch headers feeding 18-inch collector extensions (no mufflers). Even during carbureted testing, a FAST system provided the timing curve. It would not fit under the hood of any production car we know of, but it sure looked cool topped off by the 1,050-cfm Holley Ultra Dominator carburetor. Estimated Ship Date: Thursday (if ordered today. Cylinder Head, Pro-Elite, Aluminum, Complete, 68cc Chamber, 263cc Intake Runner, CNC Ported, Stainless Intake-Inconel Exh, Chevy, LS3, 6-Bolt, Each.

#Summit racing ls3 hyroolic cam cnc ported cylinder heads pro#

The Mast intake is a work of art and would be a welcome addition to any race motor. Racing Head Service (RHS) 54550-03STS - RHS Pro Elite LS3 CNC-Ported 6-Bolt Cylinder Heads. We can run lower lift on the cam profile if need be. We spec custom cam for your intended use. We have made up to 758hp naturally aspirated on the dyno using this custom cam profile with CNC ported head. 715 lift hydraulic roller custom camshaft. We ran all our tests using a single-plane intake from Mast Motorsports and also checked one of the combinations with the FAST LSXR LS3 intake and 102mm throttle-body to illustrate the difference in power between the carbureted and injected combos. Purchaser to receive: One set of new GMPP LS3 CNC ported heads custom built and set up for up to a. The reason for the wide split between intake and exhaust duration is that the rectangular-port heads feature a relatively poor intake-to-exhaust-flow relationship as a result of impressive intake flow (always desirable) but lackluster exhaust flow (not so much). We had a static compression ratio of 12.2:1 and a custom Comp Cams hydraulic roller with 255/271 degrees of duration at 0.050, 0.624 lift, and a 115-degree lobe-separation angle. Darton machined the factory block and installed its ultrabeefy Modular Integrated Deck (MID) kit that allowed us to safely combine a set of 4.185-inch Wiseco forged pistons with a 4.250-inch stroker crank from K1 to produce 468 ci of displacement. We built a 468ci stroker to match the monster flow offered by the heads being tested, and credit must be given to Darton Machinery, Wiseco Pistons, and K1 Technologies for their support of this project. ATK, Chev LS-Series, LQ4 Gen III Base Engine, 408ci, 600+HP, Hyd Roller Cam, New LS3 Aluminum Heads, 10.0:1: Chevrolet Gen III LQ4 600+HP/550+TQ Hydraulic Roller Cam CNC Ported Cathedral Heads 10.0:1 Ratio. Boost friendly.Along with a significant amount of airflow and power data, this test features controversy, destruction, and one seriously stout test mule. This long block is rated to support up to 1100 maximum horsepower. GMP / CNC LS3 cnc ported port aluminum cylinder headsДЎ00% machined, balanced, and the long block assembly is blue-printed to our race winning specs 180 wrist pins, 9.3:1 +/- compressionД¬loyes billet single roller timing chain kitД¬NC custom ground hydraulic roller camshaft *We can customize to you needs* GM LS3 6.2L Race prep aluminum engine blockД¬allies Compstar 4340 forged steel crankshaft, 4.000 strokeД¬allies Compstar 4340 forged H beam connecting rods with ARP2000 bolts, 6.125 lengthД¬P 2618 forged pistons with. We will never cut corners just to lessen the price. All our long blocks are 100% machined, CNC Machined and blue-printed to our race wining specs. We have the ability to custom build you just about any combination the way you want it. Our long blocks have become a huge hit among racers and performance enthusiast all over the world.

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