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Pure-Stock Shootout Part VI - Pontiac Pavement Pounders

Engine Battles Firebird Engine Battles 650 Ho Engine Battles Tom Miller
Strip Tuning Log
Run/TuningLaunch RPMShift Pt.60-ft.1/8-mile1/4-mile
1 Sec. rod hanger I1,7005,6002.048.7/81.9213.49/105
2 Sec. rod hanger K1,7005,5002.048.6/82.0513.48/105
3 Sec. rod hanger M1,8005,700 2.03 8.7/82.2213.47/105
4 Sec. rod hanger G1,8005,500 2.02 8.6/81.9113.47/105
5 Same1,8005,600 2.05 8.6/82.3313.46/105
Best Pass Corrected13.22/106.94
Run Notes: None

Strip Specs
Year/Model’69 Firebird 350 H.O.
Race Weight With Driver3,492 lbs
Curb Weight3,350 lbs
Fuel Level When Last WeighedFull
FuelTorco 105-octane
EngineMatching-numbers original 350 block
Cubic Inches Before/After350/366
Engine Built ByBrian McDowell and owner

Induction System
Air CleanerStock single snorkel with ACDelco filter
CarburetorOriginal 750-cfm Q-jet, 7029268
Primary Jets0.071-in
Primary Metering Rods0.044-in “BE”, 0.041-in tip
Secondary Metering RodsN/A
Secondary HangerI
Intake ManifoldStock cast iron

Fuel System
PumpStock ACDelco replacement, high volume
LinesStock 3/8-in

Heads
Casting’69 No. 48
Head PortingNone
Flow NumbersN/A
ValvesStock 2.11/1.77-in supplied by Eaton

Bottom End
PistonsSpeed-Pro cast, +0.060-in, flat-top, four-valve reliefs
RingsMoly
RodsStock cast, 6.625-in
Compression Ratio10.2:1
CrankshaftStock crank offset ground 0.012-in (3.87-in stroke) to achieve zero deck
Rotating Assembly BalancedYes

Camshaft
BrandHydraulic Cam Motion regrind of “067”
Duration at 0.050200/212-deg
Duration Advertised273/289-deg
Lift with specified rocker arms0.415/0.415-in
Lobe Separation Angle112-deg
Installed PositionStraight Up
Rocker ArmsStock Pontiac 1.50:1 stamped steel

Ignition
DistributorStock Pontiac points-type
AmplifierN/A
CoilPertronix Flame-Thrower
WiresPertronix 7mm “stealth,” stock look
Spark PlugsAC R45
Total Timing38-deg
RPM That Total Timing is Reached2,200

Exhaust
ManifoldsStock log-type
Exhaust Pipes2.5-in Pypes
MufflersWalker Super Turbo PN 17734, 2.5-in side in/side out
Crossover2.5-in Pypes X

Drivetrain
TransmissionTurbo-400 with factory shift kit, AmsOil fluid
ConverterStock GM, 1,700-rpm stall speed
ShifterStock
RearGM 8.2-in 10-bolt, synthetic fluid
Rear Gear Ratio4.11:1
PosiEaton
AxlesStock

Chassis and Suspension
Brakes F/RStock 9.5-in drums
Wheels F/RStock 14x6-in steel
Tires F/RG70-14 Firestone Wide-Oval red lines
Tire Pressure F/R43 psi / 43 psi
Suspension Fr: SpringsStock GM coils
Control ArmsStock
Stabilizer BarStock GM
ShocksMonroe Gas Suspension Rr:
SpringsStock
Stabilizer BarNone
ShocksMonroe Gas
Chassis ModsNone

The Rest
Safety ModsDriveshaft loop
PaintPPG Carousel Red
Launch TechniqueFloor it on last yellow from idle
Best 1/4-mile E.T./MPH prior to event13.63/102


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Engine Battles 1969 Firebird Engine Battles Gto
Engine Battles 1970 Gto Engine Battles 350 Ho

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