Bullock's Power Service - 482 iron head medium riser - pump gas 558 @ 5600

[My427stang]

Performance Summary:
      Cubic Inches:  482              Dyno brand: Stuska
      Power Adder:  N/A                  Where dynoed:  Dale Meers Racing, Buffalo, KY
      Peak Horsepower:  558 @ 5600 (554-560 between 5400-6000)
      Peak Torque:  583 @ 4300


Engine Specifications:
   Block brand, material, finished bore size, other notes:  D2 hydraulic side oiler, 4.25 bore, squared, aligned, torque plate honed
     
   Crankshaft brand, cast or forged, stroke, journal size: Forged SCAT 4.25
     
   Connecting Rods brand, material, center to center distance, end sizes, bolts:  Molnar 6.70

   Piston brand, material (caster, hypereutectic or forged), dish/dome volume, static CR: Mahle 4032, 8.8 dish, 9.96:1

   Main Bearings, Rod Bearings, Cam Bearings brand and size:  Clevite rod and main bearings, Durabond cam bearings

   Piston rings brand, size, other notes:  Mahle 1mm / 2mm standard tension

   Oil Pump, pickup, and drive:  Melling M57HV, Canton pickup, ARP drive

   Oil pan, windage tray, oil filter adapter:  Cobra alum T pan, no tray, standard 90

   Camshaft brand, type (hyd/solid, flat tappet or roller), lift and duration (adv and @.050"):  Custom Bullocks hyd roller, 241 intake duration / 244 exhaust duration, 115 LSA on 107

   Lifters brand, type:  Morel standard travel

   Timing chain and timing cover: Cloyes 9 position, factory timing cover

   Cylinder heads brand, material, port and chamber information:  C5AE-F medium riser, ported, flowed 325 @ .650, 90 cc, 11/32 stem
 
   Valve springs brand, part number, specs:  PAC 16094-16 158/418
 
   Rocker arm brand, type (adjustable or non-adj), material, ratio:  Lykins non-adjustable

   Rocker shafts and stands, brand, material:  Precision Oil Pump stands and shafts

   Pushrods brand, type, length:  Trend, .080 wall , 5/16, length, 8.825

   Valve covers, brand, type:   Chrome PBF

   Distributor brand, advance curve information:  Ford 427 dual point converted to Pertonix, 38 total

   Harmonic balancer brand:  Factory 427 rebuild

   Water pump brand, type (mechanical or electric):   Tuff Stuff iron  - electric powered on dyno

   Intake manifold brand, material, porting information:  Blue Thunder medium riser dual quad- unported

   Carburetor(s) brand, type:  BJ/BK rebuilt by Drew, progressive, vac secondaries left to function normally (not zip tied)

   Exhaust manifolds or headers brand, type:  Dyno headers

[My427stang]

This one is a mellow monster, very well behaved on the dyno.  This one destined for a close ratio, 3.50 geared street Fairlane with power brakes, so held the rowdy to a minimum with 64 degrees of overlap and just under 10:1.  Should be a fun machine!

[TurboChris]

Nice results!

[preaction]

Ross, how much different would the results have been with this combination and a single carb ?

[My427stang]

Paul, good question, I'd expect within 10-15 hp, but it really depends on the intake and what was done to it.   

This is an untouched BT medium riser, it's a great intake, but we do Victors with a little rubbing and they come alive, Joe has done PIs that support 560+ HP.  RPMs do well too.  If I had a single 4, I'd likely drive overlap up a bit more too, so hard to say