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#1 |
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Join Date: Apr 2012
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Saw this on another forum. Thoughts?
http://ls1tech.com/forums/drag-racin...l#post16210418 GENERAL INFORMATION: �� NHRA horsepower ratings: o 327/4.0L supercharged– 550 o 327/2.9L supercharged – 500 o 427 Naturally aspirated – 425 �� NHRA shipping weights: o 327/4.0L – 3175 lbs o 327/2.9L – 3250 lbs o 427/N/A – 3195 lbs �� Recommended max engine RPM - 7500 CHASSIS: �� Chrome-moly cage – NHRA certified to 8.50 ET �� Subframes tied together �� Front engine cradle modified to accept additional oil pan clearance �� Rear subframe modified to accept unique COPO NHRA Stock Eliminator suspension REAR SUSPENSION: �� 4-bar with adjustable top links �� Adjustable panhard link �� Double-adjustable Strange Engineering coil over shocks �� Anti-roll bar FRONT SUSPENSION: �� Adjustable Strange Engineering coil over struts �� Sway bar removed STEERING: �� Production steering gear modified for manual (non-assist) operation BRAKES: �� Light-weight vented rotors �� Billet 4-piston light-weight calipers �� Light-weight tandem master cylinder �� OEM pedal modified to mount master cylinder �� All components provided by Strange Engineering WHEELS: �� Bogart Racing light-weight with unique COPO logo �� Forged outer ring �� Billet center �� 15” x 10” rear – 5/8” studs �� 15” x 3.5” front – 1/2” studs �� 4 – 3/4” bolt circle pattern TIRES: �� Rear - 9” x 30” x 15” radial slick �� Front – 4.5” x 28” x 15” – drag-only GEARS & AXLES: �� Strange Engineering 9” aluminum center section �� Light-weight steel spool �� Strange 9310 alloy 4.29 ring & pinion set �� Strange Engineering 35-spline axles �� Strange Engineering chrome-moly yoke DRIVE SHAFT: �� 4” OD x .125” wall 6061-T6 aluminum tube �� Chrome-moly end caps �� Forged chrome-moly slip yoke �� Heavy-duty 1350 universal joints TRANSMISSION: �� ATI Racing Products “Pro Glide” o SFI-approved ATI “Super Case” o 1.80 ratio 9310 straight cut gear set o Precision balanced carrier with 4340 tool steel output shaft o Turbo spline input shaft: �� 327/4.0L – Vasco material �� 327/2.9L and 427 – 300M material o 7 clutch high gear pack o Billet clutch hub o High flow front pump with heat-treated pinned stator tube o Deep aluminum pan o Hard Chrome Rings o Fluid overflow catch can TORQUE CONVETER: �� ATI Racing Products “Treemaster MRT” Series o 327/4.0L – 9” diameter housing �� Furnace brazed impeller and turbine fins �� Precision pump drive tube �� Heavy duty needle bearings �� 22 element sprag with dual cage construction �� 327/2.9L and 427 – 8” diameter housing �� Furnace brazed impeller and turbine fins �� Precision pump drive tube �� Heavy duty needle bearings �� Investment Cast Cover SHIFTER: �� Hurst “Quarterstick” – 2-spd. automatic o Forward pattern o Built-in neutral safety switch o Light-weight aluminum cover 327 ENGINE: �� Chevrolet Performance “LSX” cast iron block with steel main caps �� 4.065” bore x 3.150” stroke �� Static compression ratio – 10:1 nominal �� Callies 4340 crankshaft – double-keyed snout �� Callies 4340 H-beam “Ultra” rods o 6.350” length o .928” pin bore diameter �� Clevite H-Series heat-treated tri-metal rod & main bearings �� Mahle 2618 alloy forged domed pistons o Graphal coating o Hard-anodized top ring groove o Friction-coated skirts �� Mahle .043” x .043” x 3mm piston rings o Ductile iron top with radius molybdenum face o Plain cast iron tapered 2nd o Chrome-plated oil rails with low-tension expander �� Comp Cams steel billet hydraulic roller camshaft o Duration – 246°/254° @ .050” lift o Theoretical valve lift - .630”/.630” o Lobe centers – 117° �� Valvetrain: o Chevrolet Performance “Ceramic Ball” high-RPM hydraulic roller tappets o 3/8” diameter LS7 pushrods o 1.8:1 ratio LS7 rocker arms with roller trunions o PSI “Max Life” beehive valve springs o Hardened steel spring seats o Light-weight steel retainers �� Fully CNC’ed aluminum cylinder heads – based on LS7 o 275 cc nominal intake port volume o 89 cc nominal exhaust port volume o 70 cc nominal combustion chamber volume o Del West titanium intake valves – 2.200” head diameter x 7mm stem o Light-weight sodium-filled exhaust valves – 1.610” head diameter x 7mm stem �� Fel-Pro Performance multi-layer steel head gaskets with raised cylinder sealing bead �� Internal wet sump oil pump �� Deep-sump cast aluminum oil pan – 6 quart capacity �� ATI Performance Products SFI-approved damper – 10-rib shell �� Whipple twin-screw supercharger o 327/550 – 4.0L o 327.500 – 2.9L �� Whipple billet throttle body o 327/500 – 172mm oval blade o 327/500 – 109mm round blade 427 ENGINE: �� Chevrolet Performance LS7 aluminum block �� 4.125” bore x 4.00” stroke �� Static compression ratio – 13:1 nominal �� Callies 5140 crankshaft �� Callies 4340 H-beam rods o 6.100” length o .928” pin bore diameter �� Clevite H-Series heat-treated tri-metal rod & main bearings �� Mahle 2618 alloy forged domed pistons o Graphal coating o Hard-anodized top ring groove o Friction-coated skirts �� Mahle .043” x .043” x 3mm piston rings o Ductile iron top with radius molybdenum face o Plain cast iron tapered 2nd o Chrome-plated oil rails with low-tension expander �� Chevrolet Performance steel billet hydraulic roller camshaft o Duration – 233°/276° @ .050” lift o Theoretical valve lift - .630”/.630” o Lobe centers – 107° �� Valvetrain: o Chevrolet Performance “Ceramic Ball” high-RPM hydraulic roller tappets o 3/8” diameter LS7 pushrods o 1.8:1 ratio LS7 rocker arms with roller trunions o PSI “Max Life” beehive valve springs o Hardened steel spring seats o Light-weight steel retainers �� Fully CNC’ed aluminum cylinder heads – based on LS7 o 275 cc nominal intake port volume o 89 cc nominal exhaust port volume o 70 cc nominal combustion chamber volume o Del West titanium intake valves – 2.200” head diameter x 7mm stem o Light-weight sodium-filled exhaust valves – 1.610” head diameter x 7mm stem �� Fel-Pro Performance multi-layer steel head gaskets with raised cylinder sealing bead �� Internal wet sump oil pump �� Deep-sump cast aluminum oil pan – 6 quart capacity �� ATI Performance Products SFI-approved damper �� Meziere billet electric water pump �� Chevrolet Performance/Holley “Hi Ram” intake manifold �� Whipple billet throttle body – 102mm blade FUEL SYSTEM: �� Aeromotive “Eliminator” fuel pump - free flow rating = 800 lb/hr �� Aeromotive A1000 pressure regulator with manifold pressure compensation capability �� Aeromotive 10-micron high-flow filter �� Light-weight black nylon braided -8 AN hoses �� Black anodized aluminum -8 AN hose ends and fittings �� High-impedance fuel injectors o 327/550 – 105 lb/hr @ 43.5 psi with EV1 connector o 327/500 – 80 lb/hr @ 43.5 psi with EV1 connector o 427/427 – 42 lb/hr @ 58 psi with EV6 / USCAR connector ENGINE CONROLS & IGNITION: �� Delco MEFI 5A electronic fuel injection processor o Speed density operation o Interfacing software & hardware available in the aftermarket �� Cable-actuated throttle �� Production LS7 ignition coils �� Production LS7 secondary wires �� GM sensors ELECTRICAL: �� Dash-installed control switches: o Starter o Ignition o Fuel pump o Cooling fan o Intercooler pump/water pump, depending on engine package GAUGES: �� Autometer with gold “Bowtie” logo on dials: o 5” 10K RPM tach with shift light o Electronic water temp with 2 1/16” face and 100°-260°F range o Electronic trans temp with 2 1/16” face and 100°-260°F range o Electronic oil pressure with 2 1/16” face and 0-100 psi range o Electronic fuel pressure with 2 1/16” face and 0-100 psi range o Voltmeter with 2 1/16” face and 8-18v range SAFETY: �� RJS Safety Equipment 3” driver restraints �� RJS Safety Equipment window net |
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#2 |
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Join Date: Jul 2007
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why did they make them all automatics?
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Stephen Johnson #2162 Horace Johnson #2167 SS/D 427 Ford Fairlane NHRA-IHRA |
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#3 |
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Join Date: Mar 2008
Location: Chicago, IL
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Wow, respect for GM. These HP ratings are much more reasonable than the Drag Paks and Cobra Jets started with. They still may need some HP, but not nearly as much as the others. Just compare the N/A 427 to the 428 CJ rated 50 less to start with. The stocker supercharged motor is rated higher than any of the CJ blown motors are now, too, with, it sounds like, the same blower. Not sure how the SS motor's rating compares to the CJs.
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3207 D/SA, C/ED |
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#4 |
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I expected the horsepower ratings to be much lower too.
Hopefully,they will still qualify at Indy with these horsepower ratings.lol |
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#5 |
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Join Date: Jan 2010
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Well now. If this is THE PACKAGE! We can BLAME the new roller rocker rule for stock on this package! Say thanks Chevrolet owners!
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#6 |
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Nice "stock" specifications...
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#7 | |
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Jeff Lee 7494 D/S '70 AMX |
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#8 |
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Never mind the fact that the LT4 had roller rockers over a decade ago huh?
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Chad Rhodes 2113 I/SA |
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#9 |
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Without going into alot of details, they did not want to hassle or figure out a clutch and tranny combinations for the cars. It was alot easier for GM to have all cars equiped with automatics. Even though on all there ads they list 3 speed auto and 5 speed stick.
Even National Dragster reports on the COPO having 3 speed auto and 5 speed stick. I know they probably did that article 3 months ago but I'm still pissed they didn't offer a stick so we could run A/S. Oh well, they are still cool and I can't wait to see them run.
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Tostoracing Retired S/ST and Stock owner/Driver Div. 5 Tech certification team |
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#10 |
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Has anbody seen any 1/4 mile times from any of the testing that has been done???
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