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474ci Engine Build - Pump-Gas Poncho Power

Cam
BrandComp Cams custom Butler grind
TypeHydraulic roller
Duration at 0.050242/248-deg
Lift0.540/0.562-in with 1.5:1 rockers
Intake CenterlineInstalled at 106.5 deg
Lobe Separation Angle110 deg
LiftersComp Cams No. 857-16
Timing SetButler Performance No. JPP-5614LB-5, 0.005-in undersized, nine-way adjustable
Timing Chain TypeBillet-steel roller
Distributor Driven GearBOP No. PDG38, polymer, for MSD distributor

Induction
CarbBarry Grant Demon
Size850 cfm
ModsNone
Jets Front/RearNo. 81/89
Fuel PumpRobbMc No. 1006
Intake ManifoldEdelbrock Victor No. 2957, modified by Butler Performance
Spacer1-in phenolic, open design
Fuel Used for Test92-octane BP

Ignition
DistributorMSD Billet HEI
CoilMSD in-cap
WiresMSD 8mm
Total Timing40 deg
Spark PlugsNGK No. R5671A-7, gapped at 0.050 in

Exhaust
HeadersDoug’s four-tube
Primary Diameter1.75-in
Collector3.00-in

Gaskets
BrandNo. SPM-KSX703-74, complete Pontiac overhaul

At The Dyno
Conditions
Actual Air temp 74 deg F; Baro: 28.59-in of Hg; Humidity: 45 percent
Corrected ToAir temp: 60 deg F; Baro: 29.92-in of Hg; Humidity: dry
Water Temp195-deg
Oil Temp195-deg

Corrected Dyno Results
RPMHPTorque
3,100315533
3,200326535
3,300336535
3,400343530
3,500352528
3,600361527
3,700372528
3,800385532
3,900411554
4,000434570
4,100446572
4,200459575
4,300478583
4,400489584
4,500497580
4,600513586
4,700527588
4,800535585
4,900547587
5,000554582
5,100561578
5,200566572
5,300574569
5,400575559
5,500578552
5,600571535
5,700572527

  • Pull 1: 81/89 jets; 40 deg; 577 hp at 5,400 rpm; 588 lb-ft at 4,800 rpm
  • Pull 2: 77/85 jets; 40 deg; 567 hp at 5,400 rpm; 585 lb-ft at 4,600 rpm
  • Pull 3: 77/85 jets; 38 deg; 564 hp at 5,300 rpm; 582 lb-ft at 4,700 rpm
  • Pull 4: 75/83 jets; 38 deg; 547 hp at 5,500 rpm; 568 lb-ft at 4,800 rpm
  • Pull 5: 75/83 jets; 35 deg; 547 hp at 5,300 rpm; 568 lb-ft at 4,600 rpm
  • Pull 6: 81/89 jets; 40 deg; 570 hp at 5,500 rpm; 586 lb-ft at 4,600 rpm
  • Pull 7: 81/89 jets; 42 deg; 578 hp at 5,500 rpm; 588 lb-ft at 4,700 rpm
  • Pull 1: 470/559
  • Pull 2: 463/550
  • Pull 3: 463/550
  • Pull 4: 451/536
  • Pull 5: 452/539
  • Pull 6: 468/558
  • Pull 7: 480/561
  • Butler Performance
    (931) 762-4596

    www.butlerperformance.com
    Spanel Engines
    8400 S. 91st St.
    Lincoln
    NE  68526
    Restore A Musclecar
    www.restoreamusclecar.com

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    Pontiac Solstice Research
    Pontiac Solstice Get updated on all your car buying needs from safety features, to specs, to crash test ratings and options. Get all the information you need if you are interested in buying a new car like the Pontiac Solstice. The L4 standard engine in the Solstice gives you 173 horsepower with an estimated 22 mpg. It has a comparable trade in value which should come in handy when you go to shop for your next car. The Pontiac Torrent and the Pontiac G6 are other vehicles that might interest you.

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