Twisted Wedge® Race 206 and 225 Cylinder Heads for Small Block Ford Trick Flow’s Twisted Wedge Race 206 heads feature fully CNC-profiled Twisted Wedge combustion chambers and valve arrangement with port-to-valve seat blending (bowl blending), plus .500" raised exhaust runners, and raised valve cover rails. Fast As Cast® runners deliver near-CNCported airflow and power for about the same price as cast heads. The Twisted Wedge Race 225 heads have all of the features of the Race 206 heads but come with top-ofthe-line CNC Competition Ported runners with a high resolution surface finish for maximum airflow and power over the entire powerband. Twisted Wedge Race heads have additional material for porting, thick decks and chamber walls for durability, intake port shaping for Fel-Pro #1262 gaskets, stud mounts for roller rocker arms, and huge valve spring pockets. Cylinder heads are available fully assembled or as bare castings. Sold individually.
TFS-5241T005-C01
Specifications
Dyno Results Twisted Wedge Race 225
Test Engine: 10.59:1 compression 408 c.i.d. with Trick Flow Twisted Wedge® Race 225 cylinder heads (TFS-5240T005-C01), COMP Cams Xtreme Energy mechanical roller camshaft (254°/260° duration @.050"; .621"/.627" lift; 110° lobe separation), Trick Flow 1.6 ratio roller rocker arms (TFS-51400520), Edelbrock Super Victor intake manifold, Hooker headers with 17⁄8" primaries, open exhaust.
Small Block Ford
Twisted Wedge Race 206 Heads, Fast As Cast Runners, Assembled TFS-52410003-M61 TFS-52410004-M61 TFS-52410005-M61 TFS-5241T005-M61 TFS-52410006-M61 TFS-5241T006-M61 TFS-5241T805-M61
1.550" dual valve springs, 206cc intake runners 1.550" dual valve springs and O-rings, 206cc intake runners 1.560" dual valve springs, 206cc intake runners 1.560" dual valve springs and titanium retainers, 206cc intake runners 1.560" dual valve springs and O-rings, 206cc intake runners 1.560" dual valve springs, O-rings, and titanium retainers, 206cc intake runners 1.640" dual valve springs and titanium retainers, 206cc intake runners
Twisted Wedge Race 225 Heads, CNC Competition Ported Runners, Assembled TFS-52410003-C01 TFS-52410005-C01 TFS-5241T005-C01 TFS-5241T805-C01
1.550" dual valve springs, 225cc intake runners 1.560" dual valve springs, 225cc intake runners 1.560" dual valve springs and titanium retainers, 225cc intake runners 1.640" dual valve springs and titanium retainers, 225cc intake runners
Airflow Results Twisted Wedge Race 225 Lift Value .100" .200" .300" .400" .500" .600" .700"
Intake Flow CFM 67 141 213 270 308 331 341
Exhaust Flow CFM 59 116 159 205 244 259 271
Material: A356-T61 aluminum Combustion Chamber Volume: M61: 61cc CNC-profiled C01: 65cc CNC-profiled Intake Port Volume: M61: 206cc Fast As Cast C01: 225cc CNC Competition Ported Intake Port Location: Stock Intake Port Dimensions: M61: 1.375" x 2.125" C01: 1.375" x 2.240" Intake Gaskets: M61: Fel-Pro 1262 C01: Fel-Pro 1262R Intake Valve Diameter: 2.080" (TFS-52400217) Intake Valve Seat: Tungsten alloy (TFS-52400271) Exhaust Port Volume: M61: 92cc Fast As Cast C01: 100cc CNC Competition Ported Exhaust Port Location: Raised .500" from stock Exhaust Port Dimensions: 1.510" x 1.660" oval Exhaust Gaskets: Fel-Pro 1427 Exhaust Valve Diameter: 1.600" (TFS-52400212) Exhaust Valve Seat: Copper bronze alloy (TFS-52400272) Valve Angles: Intake 15°, exhaust 17° Valve Guide Material: Bronze alloy (TFS-52400252) Valve Seals: Viton® fluoroelastomer (TFS-51400454) Valve Seat Angles: 45° x multi-angle Valve Spring Pocket Diameter: 1.760" Valve Spring I.D. Locators: 1.550" (TFS-21400440), 1.640" (TFS-21400441) Valve Spring Retainers: 10° x 1.550" o.d. chromoly steel (TFS-21400425) 10° x 1.550" o.d. titanium (TFS-214T0520) Valve Stem Locks: 10° machined steel with lash cap recess (TFS-52400444) Valve Springs, Standard: 1.550" o.d. dual spring with damper (TFS-16094-16) 138 lbs. @ 1.950" installed height 430 lbs. @ 1.250" open 420 lbs. per inch rate .680" maximum valve lift Valve Springs, Option 1: 1.560" o.d. dual spring with damper (TFS-16318-16) 240 lbs. @ 2.000" installed height 600 lbs. @ 1.280" open 500 lbs. per inch rate .720" maximum valve lift Valve Springs, Option 2: 1.640" o.d. dual spring with damper (TFS-16414-16) 250 lbs. @ 2.000" installed height 800 lbs. @ 1.150" open 600 lbs. per inch rate .850" maximum valve lift Guideplates: 5/16" (TFS-52400622), 3/8" (TFS-52400624) Rocker Arm Studs: 7/16" (TFS-51400614) Rocker Arms: TFS-51400511 (1.6 ratio, 7/16" studs) TFS-51400521 (1.7 ratio, 7/16" studs) Minimum Bore Diameter: 4.000" Cylinder Head Bolts: TFS-92005 Head Gaskets: TFS-51494060-040, TFS-51494080-040, or TFS-51494155-040 Pushrod Length: Longer than stock required Spark Plugs: Autolite 3932 NOTE: Valve cover rail is raised .350" over stock. Viton® is a registered trademark of DuPont Performance Elastomers.
Tests conducted at 28" of water (pressure). Bore size: 4.125"; exhaust with 2" pipe. To view more airflow charts, go to TrickFlow.com and type the part number you want to see into the Search box and then click “Search.”
36
Phone: 1300 350 351
Fax: 1300 350 454
Web: www.fabre.com.au
Email: info@fabre.com.au