Power Products, GM LS3 Square Port Head, 257cc/73cc, Bare Competition
For a street car, this design means excellent throttle response, torque and average power. Dyno tests have proven that comparable aftermarket cathedral port heads can match a rectangular port in peak power, while proving much more impressive below the curve.
Square port heads 823 ls3 l76 l92 LS1TECH Camaro and Firebird Forum
Ultimate LS Rectangular Port Cylinder Heads Guide September 21, 2015 by LS Engine DiY Rectangular port heads boast a clear advantage in the flow department and are ideal for high-RPM, big-cubic-inch, and purpose-built drag racing applications.
Dart, Pro1 GM LS3 15 Deg. Square Port Aluminum Cylinder Heads, 280cc
The intake manifold is the most important element in swapping from a cathedral to a rectangular port head. To match the runners, this factory LS3 (PN 12610434) or an L76 manifold are the most popular.
Square port ls heads LS1TECH Camaro and Firebird Forum Discussion
ProMaxx Performance XXTREME Assembled 240 cc Rectangle Port Cylinder Heads for LS1, LS2 w/4 in. Min. Bore w/59 cc Combustion Chambers XXTREME Assembled Cylinder Heads LS1, LS2 w/3.898 in. Bore 240 cc Rectangle Ports 59 cc Combustion Chambers 2.08 in. Int./1.60 in. Exh. Valves Valve Angle: 11° Valve Springs: .650 in. Max Lift
Testing LS CathedralPort Vs. SquarePort Heads Hot Rod Network
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Square port heads 823 ls3 l76 l92 LS1TECH Camaro and Firebird Forum
The LS engine family offered more power and torque and less weight, while simultaneously improving fuel mileage and reducing emissions. Time marched on, and Chevy upgraded the LS family to LS3 status. Offering increased displacement and even more power, the LS3/L92 variants represented the next evolutionary step in performance.
Testing LS CathedralPort Vs. SquarePort Heads Hot Rod Network
Cylinder Heads - Square Intake Port Shape - Free Shipping on Orders Over $109 at Summit Racing Home Cylinder Heads Product Results Filters In Stock. Ships Today. (14) In Stock, Including at a Supplier. Ships In a Few Days. (67) Get Results Brand Speedmaster (68) Airflow Research (AFR) (40) Trick Flow Specialties (7) Edelbrock (6) Dart (3)
Testing LS CathedralPort Vs. SquarePort Heads Hot Rod Network
Dare To Be Square. Moving forward, we come to Mast's raised square port LS7 heads. They've got three different sizes of LS7 heads, designed to match specific bore sizes: The 11-degree 265cc head intended for 4.000+ bores, the 12-degree 285cc head for 4.125+ bores, and the line-topping 12-degree 305cc head, also for 4.125+ bores.The 265 is configured to accept LS3-style valvetrain hardware.
Testing LS CathedralPort Vs. SquarePort Heads Hot Rod Network
21 Sort: Position ` BTR ROCKER ARM TRUNNION KIT GRIP RINGS - SET OF 33 - TK/GRIP RING-33 $4.99 Add to Cart TRICK FLOW GEN X 255CC COMPLETE LS3 CYLINDER HEAD - SOLD INDIVIDUALLY - TFS-3261T004-C01 WILL SHIP DIRECTLY FROM MANUFACTURER ESTIMATED SHIP DATE: TBD $1,519.99 Add to Cart GEN V LT ROCKER ARMS WITH BTR TRUNNIONS - GENVRKRS-16
Testing LS CathedralPort Vs. SquarePort Heads Hot Rod Network
In a comparison of the cammed 243 head and the cammed rectangle-port LS3 head, the LS3 torque peaks at 456 lb-ft (4,800 rpm) while the 243 head made at least that much torque from 3,500 rpm all.
Testing LS CathedralPort Vs. SquarePort Heads Hot Rod Network
Series The XXTREME Series is our newest line performance cylinder head. It features professionally designed runners and chambers meticulously designed in the U.S.A. At PROMAXX, we provide our XXTREME series at prices that make our competition cringe. Going fast doesn't have to break the bank, so get a pair of XXTREME Series Heads today.
Square port heads 823 ls3 l76 l92 LS1TECH Camaro and Firebird Forum
In this episode of Summit Racing Speed Secrets, Richard Holdener pits a set of LS cathedral port heads against LS rectangular port heads in a dyno shootout..
Video LME Dyno Tests Cathedral Port Versus Rectangle Port Heads
#1 · Oct 6, 2010 I posted this over on tech but figured I'd post it here for those of you that don't visit that site. There's been a lot of talk lately about GM's square port heads versus the Cathedral Port heads we've all become familiar with.
LS Rectangle Port Heads
21 Sort: Position ` TRICK FLOW GEN X 255CC COMPLETE LS3 CYLINDER HEAD - SOLD INDIVIDUALLY - TFS-3261T004-C01 WILL SHIP DIRECTLY FROM MANUFACTURER ESTIMATED SHIP DATE: TBD $1,519.99 Add to Cart AFR MONGOOSE 260CC LS3 CYLINDER HEADS - BUILD YOUR OWN As low as $2,672.53 Add to Cart 210CC LS1 ENFORCER CYLINDER HEAD - SINGLE - ASSEMBLED $658.45
Square port ls heads LS1TECH Camaro and Firebird Forum Discussion
Despite numerous differences the Gen III LS Engine and Gen IV LS Engine cylinder blocks share a lot of the same traits. 4.400 Bore Spacing (same as the original SBC) Deep Skirt Block with Six Bolt Cross Bolted Main Bearing Caps (reminiscent of the old Ford side oilers, FE, and some early hemi blocks) Center Main Thrust Bearing. 9.240 Deck Height.
Goodwin/Brodix Pro Port LS7 12 Deg. CNC Ported Square Port Heads, 300cc
Jun 6, 2018 Just in case you aren't up on current events in the LS community, there seems to be a divide wedged firmly between cathedral port and rectangular port enthusiasts. For those.