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Posts Tagged ‘Certified stock’

Dave Hemker’s 70 GS “Sparty” Certified Stock

Tuesday, November 2nd, 2010

The engine for my car was put together to be certified stock.

Block 1972 stock bore 455, 4.3125

Crank turned .010, .010 by FinishLine Motorsports, stock 3.90 stroke

Pistons TRW forged stock replacement with the button in the center ground off, 23.5 cc dish

Rods Stock, resized

rotating assembly is balanced

Deck .041 deck height

Head Gaskets Steel Shim .020

Heads 1970 heads converted to Stage 1 by Finish Line Motorsports

NHRA minimum 55.5 cc chambers

NO porting, NO polishing, NO gasket matching

3 angle valve job with stock valve & seat angles

Compression Ratio 10.95

Intake manifold Stock 1970 intake

NO porting, NO polishing, NO gasket matching

NO cutting in the plenum area or anywhere else

Carb Stock Q-jet, 750 cfm

Air cleaner Stock 1970 GS air cleaner

Exhaust manifolds Stock manifolds, 2” outlet exit to the pipes

NO porting, NO polishing, NO gasket matching

Jet Hot coated

Exhaust system 2.5 “ mandrel bent to the bumper

X-pipe, StraightLine Performance oval case mufflers

Fuel Pump Stock Delco Stage 1 fuel pump

Ignition Stock distributor with Pertronix 1181 conversion and matching

Pertonix 40,000 volt coil, 7mm wires

Spark Plugs Autolite #25

Timing chain Stock silent chain, steel gears

Camshaft: Competition Components custom grind using Stage 1 cam specs

Lifters Hydraulic

Rocker arms Stock

Pushrods 5/16” adjustable

Chassis

1970 GS, 3750 lbs with driver, full interior, bench seat, column shift, manual steering, manual disc brakes, no a/c, 3.73 12 bolt axle, turbo 400 with stock convertor.

Best et to date:

G-70-15 bias ply tires 12.53 @ 110+ with 1.95 60’

9x28x15 Goodyear slicks 12.43 @ 110+ with 1.85 60’