492" FE with PSE Intake Adapter and Weiand Tunnel Ram

[jayb]

Performance Summary:
      Cubic Inches:   492            Dyno brand:  SuperFlow 901
      Power Adder:   No            Where dynoed:  FE Power LLC
      Peak Horsepower:  662.0
      Peak Torque:  623.7

Horsepower and Torque Curves:




Engine Specifications:
   Block brand, material, finished bore size, other notes:
Ford 427 sideoiler block, 1968, cast iron, 4.293 (0.060" over), cracks welded up on deck and in main cap bolt holes, thin cylinders
   
   Crankshaft brand, cast or forged, stroke, journal size:
Scat 4.25" cast iron stroker crank, BBC rod journals

   Connecting Rods brand, material, center to center distance, end sizes, bolts:
Scat 6.700" center to center H-Beam BBC connecting rods, .990" BBC pins, 2.200" rod journal size 2.200", Scat rod bolts

   Piston brand, material (caster, hypereutectic or forged), dish/dome volume, static CR:
Custom forged Diamond pistons and pins, 16cc dish, static compression ratio 11.3:1

   Main Bearings, Rod Bearings, Cam Bearings brand and size:
Federal Mogul 125M main bearings, Federal Mogul Z87200CH rod bearings

   Piston rings brand, size, other notes:
Total Seal 1/16 - 1/16 - 3/16 p/n CR7190-65 plasma moly

  Oil Pump, pickup, and drive:
Precision Oil Pumps blueprinted high volume, 5/16" drive

   Oil pan, windage tray, oil filter adapter:
Milodon 7 quart p/n 31130 pan, Moroso p/n 22940 windage tray, Ford stock late model, high flow filter adapter

   Camshaft brand, type (hyd/solid, flat tappet or roller), lift and duration (adv and @.050")
Comp Cams custom roller, intake lobe 4878, exhaust lobe 4879
- Lift .700 intake / .711 exhaust
- Advertised duration 304 intake / 310 exhaust
- Duration at .050" lobe lift 266 intake / 272 exhaust
- Lobe separation angle 110
- Installed 4 degrees advanced, ICL=106 ATDC

  Lifters brand, type:
Crower solid roller with HIPPO pin oiling feature, p/n 62216H-16

   Timing chain and timing cover:
Rollmaster Indexable Tru-Roller timing set, Shelby timing cover

   Cylinder heads brand, material, port and chamber information:
Edelbrock Aluminum 60059 bare castings
- Guides installed for 11/32" stem valves
- Max effort porting job
- 72cc combustion chambers
- .070" restrictors in head oiling passage

   Cylinder head flow in cfm at inches of lift (28" H2O pressure drop):
      Intake               Exhaust
      .100   80              .100    62
      .200   169            .200    118
      .300   233            .300    166
      .400   280            .400    203
      .500   308            .500    236
      .600   329            .600    252
      .700   343            .700    261
      .800               .800

   Flow bench used, location:
Superflow SF-600, R&R Performance

   Intake valve brand, head size, stem size:
Manley stainless steel 2.250" head, 11/32" stem

   Exhaust valve brand, head size, stem size:
Manley stainless steel 1.750" head, 11/32" stem
 
  Valve springs brand, part number, specs:
Comp Cams p/n 943, 240# on seat, 650# full open

  Retainers and locks brand, part number, specs:
Comp Cams titanium retainers, 10 degree, p/n 731-16, Comp Cams machined steel locks, p/n 611-16

  Rocker arm brand, type (adjustable or non-adj), material, ratio
Erson rocker assembly, adjustable, aluminum with roller bearings, 1.76:1

  Rocker shafts and stands, brand, material:
Erson rocker assembly

   Pushrods brand, type, length:
Smith Brothers ball and cup, .375" diameter, 9.200" overall length

  Valve covers, brand, type:
Cobra Lemans aluminum valve covers from Summit Racing

   Distributor brand, advance curve information:
MSD electronic distributor, p/n 8594
- Recurved for 20 degrees total centrifugal advance
- All advance in by 3000 RPM

   Harmonic balancer brand:
ATI steel p/n 918310, SFI approved

   Water pump brand, type (mechanical or electric):
Edelbrock aluminum p/n 8805, mechanical

  Intake manifold brand, material, porting information:
PSE intake adapter, port matched to the heads, with Weiand tunnel Ram

   Carburetor(s) brand, type
2 Holley 660 Center Squirter carbs

   Exhaust manifolds or headers brand, type:
Hooker adjustable race headers, 2 1/8" primaries, p/n 6375HKR

[BigBlockFE]

nice numbers on that engine, compression is high, what octane???

[jayb]

I run all the dyno tests on a locally available 110 octane race gas, although this engine really doesn't need it.  In fact, I think it would probably run about the same on pump premium gas, although on the dyno I don't think I'd want to chance it.  DCR on the engine is about 8.4:1 if I recall correctly, which is certainly within pump gas range.

[machoneman]

Nice results! Jay, can you post a pic of the engine with your results? I'm sure I'm not the only one who would like to see it.

[cjshaker]

I think pictures should be mandatory. Heck, some of you guys could be making this stuff up

No block filler was used? Pretty gutsy to be running a welded up, thin walled, 4.25 stroked 427 block to 7000rpm. Pretty impressive numbers. What is the engine destined for? Street? Strip?

[jayb]

That engine was built in 2006, and is one of the dyno mules featured in my book.  Its currently sitting on an engine stand in my shop, waiting for the next series of dyno tests, or the next vehicle that needs it, whatever.  No block filler in that engine, and in fact the sonic map of the cylinders is published in my book also.  That engine is one reason why I'm not too afraid of a thin wall 427 block.

Unfortunately I don't have a picture of the engine with the tunnel ram on it.  I do have one black and white photo shown in the book where the engine has the Blue Thunder 2X4, but the size is too big to post here without blowing the page way up.

[cjshaker]

Bummer, I was curious what it looked like with the adapter and tunnel ram on it.

The clover leaf cylinders really do help. Probably wouldn't be such a great idea with an older LR 427 block.

[jayb]

It would look like this:

[fairlanegt427]

that is a nice setup jay. i cant wait to start playing with that intake i bought from you. also, not to get off the subject but how have the clear style valve covers been working out so far.

[cjshaker]

It would look like this:

LMAO! Well, I asked for it

[jayb]

One primary reason why I'm converting my 68 Mustang to FE power (see the Member Projects section) is that so I can run those valve covers on the street, in the summer heat, for a few months, and make sure they hold up.  If they do, I hope to make them available by the end of the year.

[fairlanegt427]

if i remember right pse used to make those im probably wrong however and i read a year or so ago on a post that you made these.  its just a weight thing to save some lbs. hell  i dont want to lose weight myself when i can just buy the lighter parts lol

[jayb]

PSE did used to make the clear valve covers.  Just call me Pro-Stock Paul 

[machoneman]

Hey, hey...I called you Pro Stock Paul first if you remember! LOL!

[jayb]

Yes, Bob, you're the winner