PONTIAC 501 DYNO RUN

 

By Mike Mavrigian

    We finally had a chance to run the Pontiac 501 on dyno. Following are the results. We ran the engine at Ross Racing Engine’s new Superflow SF-902 engine dynamometer in late May, 2012 (Ross is located in Niles, OH, about 62 miles east of my facility).

After setting the engine up on the dyno stand, we installed a set of Hooker Super Comp headers, featuring 1/75” primary tubes and 3” collectors. The sump (and oil filter) was filled with Brad Penn 30W specialty Break-In oil, which contains a high level of ZDDP. Even though this engine features a roller camshaft, break-in oil is nonetheless a good idea in order to aid ring seating and to provide added protection for rocker arms and valve stem tips with higher spring pressures. Again, although high-zinc-content break-in oil is primarily targeted at break-in for flat tappet cams, but the high pressure lubrication provided by this specialized oil is a good idea for any fresh engine, regardless of the cam/lifter style.  


The engine is mounted to the SuperFlow dyno cart, and the drive plate assembly is installed to the PRW flexplate. We installed a "stock" Pontiac starter (which required 3 starter shims for proper tooth alignment).

.   Once oil was added (through the distributor hole, in order to introduce oil directly to the oil pump), the oil pump drive was run with an electric drill until 63 psi oil pressure was recorded. This insured against a dry-start. Immediately after pre-oiling, both valve covers were removed to inspect the rockers and to verify that each rocker was receiving proper oil delivery. The engine was initially fired using one of Ross’s “house” carburetors (a 4150 type Holley 850 cfm double pumper). Ross’s Tony Lombardi prefers to initially fire all dyno engines using a carb that has a proven track record, to avoid any potential mixture/backfire problems (primarily to avoid issues with damaging his pricey air sensor). Once the engine ran for about 20 minutes (at around 1800 rpm), the engine was shut down and inspected again (valve lash, inspecting for leaks, etc.). The engine was then run with Holley’s “black” Ultra HB 850 cfm carb (the new all-aluminum monster), which, by the way, provided our best horsepower runs.  


Connected and ready for its first firing on Ross's new SuperFlow dyno cell.

.  


During carb swaps, fuel was spilled onto the intake manifold (difficult to avoid that). The clearcoat on our carbon fiber film treated manifold held up to both heat and fuel, with no lifting or staining whatsoever. Nice to know. The only issue I saw was a slight deformation of the clearcoat around the perimeter of a few intake manifold bolt washers (simply due to pressure exerted by the washers on the thick clearcoat). In the future (when I have another manifold treated in this manner), I'll spot-face all bolt holes to fit the intended washers, and tell the graphics house to avoid applying clearcoat to the spot-faced washer recesses, which will eliminate this minor concern. But in terms of heat and fuel exposure, the urethane clearcoat held up extremely well. I'm really pleased with the appearance and durability of the graphics treatment and will definitely consider this in future builds.

  .  


Before initial firing, the engine was pre-oiled. Valve covers were then removed to verify that each rocker was receiving oil.

  .    


Tony checks our timing. Timing checks were performed during each run.

  .    


Initial runs were made with Ross's "house" carb before swapping out to our Holley 850cfm black Ultra HB carb.

  .    


Our timing as set at 36 degrees.

.    


Ross Lombardi (at the control panel) and Tony monitoring an initial run.

  .  


Our max power was recorded at 525.4 HP at 4900 rpm, and max torque was 604.8 lb-ft at 4100 rpm.

  .


 SCFM at max HP was 622.

  .  


Oil pressure was consistent throughout the runs.

  .  


Horsepower (red curve) and torque (blue curve).

.   The only minor glitch we ran into involved a disappointing failure of our Spectre engine oil dipstick that I had purchased from Summit Racing. During one oil level check, the “billet” aluminum handle simply popped off of the stick (poor press-fit connection of the stick to the handle). Luckily, about ¾” of stick protruded above the dipstick tube, so extraction wasn’t a problem. After tossing the aftermarket dipstick into the closest trashcan, we temporarily sealed the dipstick tube with a rubber cap and proceeded. Considering that this was our only gremlin, the session went great.  

OUR BEST PULLS

Budget-wise, I didn’t have the luxury of spending additional time on Ross’s dyno for fine tuning or experimentation with different intake manifolds, timing setups, carb adjustments or cams. In the short time we spent that day, our peak horsepower was recorded at 525.4 HP at 4900 rpm, and peak torque was a whopping 604.8 lb-ft at 4100 rpm, with timing set at 36 degrees.  Obviously, the valvetrain and bottom end is certainly capable of handling much higher rpm. We strongly felt that with more cam duration and experimenting with larger-volume intake manifold runners, the rpm band would move upwards, and obtaining very close to 600 HP would be realistic. However, for the first time out of the gate, we felt that this session was very successful. She’s definitely a stump puller.      

MY PARTS LIST

  BLOCK………………………..Original Pontiac 455 (core) CRANKSHAFT……………….Ohio Crankshaft P/N 44554500P 4340 forged, with 4.500” stroke,                                                     455 mains and BBC rod pins                                                      CONN. RODS………………….Scat forged 6.700” BBC P/N 2-454-6700-2200 STEEL CENTER MAIN CAPS..Pro-gram Engineering P/N P455C MAIN STUDS…………………ARP P/N 194-5601 HEAD STUDS…………………ARP P/N 190-4305 CYL. HEADS………………….Kaufman Racing aluminum D-port, 81cc CNC CAMSHAFT/LIFTERS………..Comp Cams hyd. roller P/N CL51-433-9 ROCKERS……………………..Harland Sharp alum. rollers, P/N S6001 (1.5:1) PISTONS……………………….JE forged aluminum (custom order) TIMING GEARS……………….Melling Performance P/N 40408 OIL PUMP………………………Melling Performance P/N 10540 TIMING COVER……………….EQ (EngineQuest) P/N TC400N INTAKE VALVES………………Del West titanium (custom order: 2.10” x 5.100”) EXHAUST VALVES……………Ferrea stainless steel P/N F5144 (1.77” x 5.100”) VALVE SPRINGS………………Comp Cams P/N 995-16 (330 lb, triple) RETAINERS…………………….Comp Cams 740-16 (10-deg, steel) VALVE LOCKS EXH…………..Comp Cams 613-16 (10-deg Superlocks) VALVE LOCKS INT……………Manley 13161-8 (10-deg Beadlock) VALVE SEALS…………………Comp Cams, Teflon VALVE SPRING LOCATORS…Comp Cams 4771-16 BALANCER…………………….Fluidampr P/N 650401 (6-5/8”) FLEXPLATE……………………PRW P/N 1845503 INTAKE MANIFOLD…………..Professional Products Hurricane P/N 56031 CARBURETOR…………………Holley P/N 0-82851 (850 cfm) CARB. FEED……………………Earls –8, P/N AT101286ER (7/8” thread) CARBURETOR…………………Holley P/N 0-80804HB (Ultra aluminum) CARB. FEED (for Ultra)………..Holley P/N 34-44 (-8 to ¾” thread) DISTRIBUTOR…………………MSD Pro Billet P/N 8563 SPARK PLUG WIRES………….MSD P/N 31179 SPARK PLUGS…………………NGK R5671A-7 WIRE SEPARATORS…………..Billet Specialties 69604 (4-wire) WIRE SEPARATORS…………..Billet Specialties 69602 (2-wire) LIFTER VALLEY COVER……..Kaufman Racing (aluminum) GASKET SET            …………………...Mahle Victor FS3494J CYL. HEAD GASKETS………...Cometic C5712-045 (4.300” bore/0.045” thick) MAIN BEARINGS……………...Mahle Clevite P/N MS667P ROD BEARINGS……………….Mahle Clevite P/N CB743HN CAM BEARINGS……………….Mahle Clevite P/N SH2925 VALVE COVERS……………….PRW welded aluminum, satin WATER PUMP………………….Tuff Stuff 1475NA (chrome) or PRW 1445510 ALTERNATOR…………………Tuff Stuff, P/N 7139ABULL (100A, chrome) OIL PAN STUDS……………….ARP 400-1902 INTAKE MANIFOLD BOLTS…ARP 494-2101 ROCKER STUDS……………….ARP 100-7101 CARB STUDS…………………..ARP400-2403 TIMING COVER BOLTS……....ARP 490-1501 FUEL PUMP BOLTS…………...ARP 490-1601 THERMOSTAT BOLTS………..ARP 490-7401 DISTRIBUTOR STUD……….…ARP 490-1701 CAMSHAFT BOLT……………..ARP 190-1001 VALVE COVER STUDS………..ARP 400-7504 FLEXPLATE BOLTS…………....ARP 200-2904 CRANK BALANCER BOLT……ARP 190-2501 HEAD TO BLOCK DOWELS…...Pioneer S-1110 CAMSHAFT NOSE SPACER WASHER….Kaufman Racing (takes the place of the OE eccentric fuel pump re thickness) ENGINE LIFT HOOKS……………Kaufman Racing DIST. HOLD-DOWN CLAMP……Kaufman Racing POLY DISTRIBUTOR GEAR…….BOP P/N PDG37/38 (.500” for MSD) OIL PAN (steel OE type)..…………Kaufman Racing DIPSTICK………………………….Spectre P/N 5748 (billet handle) UPPER DIPSTICK STUBE………..Kaufman Racing LOWER DIPSTICK TUBE………..Kaufman Racing OIL FILTER HOUSING…………..Kaufman Racing FUEL PUMP BLOCK PLATE…….Kaufman Racing THERMOSTAT HOUSING……….Spectre P/N 4737 OIL PAN PLATES…………………Kaufman Racing OIL PUMP DRIVE ROD ………….Melling VITON REAR MAIN SEAL………B.O.P ASSEMBLY CHEMICALS……….Valco, ARP, Royal Purple PUSHRODS (5/16”)………………..Trend 9.000” int/8.950” exh (0.080” wall) CRANK PULLEY………………….CVF Racing, P/N PONT2CR WATER PUMP PULLEY………… CVF Racing, P/N PONT2WP ALTERNATOR BRACKET……….Tin Indian TIP-029 V-BELT (3/8”W x 46.1”)…………..Goodyear Gatorback 15461 BREATHERS………………………Billet Specialties CRANK PULLEY BOLTS…………ARP 613-1250 WATER PUMP PULLEY BOLTS…ARP 712-0750 AIR CLEANER……………………..Holley P/N 120-145 ENGINE PAINT……………………Pontiac Light Metallic Blue in Dupont  Chroma basecoat/clearcoat…custom match .    

OUR PROJECT’S SUPPLIER DIRECTORY

  ARP, INC. 1863 Eastman Ave. Ventura, CA 93003 800-826-3045 www.arp-bolts.com     Birchwood Automotive Group 10205 Wooster Pike Rd. Creston, OH 44217 330-435-6347 www.birchwoodautomotive.com     B.O.P. Engineering N3651 Schmidt Rd. Jefferson, WI 53549 920-674-6058 www.bopengineering.com   Brad Penn Lubricants 77 N. Kendall Ave. Bradford, PA 16701 814-368-1340 www.bradpennracing.com     Comp Cams 3406 Democrat Rd. Memphis, TN 38118 800-999-0853 www.compcams.com     CVF Racing www.cvfracing.com       Del West Engineering 28128 W. Livingston Ave. Valencia, CA 91355 800-990-2779 www.delwestusa.com     DipNDesign Wooster, OH 330-988-2632 www.DipNDesign.com     Earl’s Performance Plumbing Holley Performance Products P.O. Box 10360 Bowling Green, KY 42102 270-782-2900 www.holley.com     EQ (Enginequest) 2580 N. Commerce St. North Las Vegas, NV 89030-3876 800-426-8771 www.enginequest.com       Ferrea Racing Components 2600 NW 55th Ct., Suite 234 Ft. Lauderdale, FL 33309 888-733-2505 www.ferrea.com     Fluidampr-Horschel Motorsports 180 Zoar Valley Rd. Springville, NY 14141 716-592-1000 www.fluidampr.com     GoJo Industries One GoJo Plaza, Suite 500 Akron, OH 44311 800-321-9647 www.gojo.com       Goodson Tools & Supplies 156 Galewski Dr. Winona, MN 55987 800-533-8010 www.goodson.com     Greber Powdercoating 313 Clark St. Elyria, OH 44035 440-323-8588 www.grebermachine.com       Harland Sharp 19769 Progress Dr. Strongsville, OH 44149 440-238-3260 www.harlandsharp.com       Holley Performance Products P.O. Box 10360 Bowling Green, KY 42102 270-782-2900 www.holley.com     JE Pistons Inc. 15312 Connector Lane Huntington Beach, CA 92649 714-898-9763 www.jepistons.com       Kaufman Racing Equipment 22280 Temple Rd. Glenmont, OH 44628 740-599-5000 www.krepower.com       Lista International 106 Lowland St. Holliston, MA 01746 800-722-3020 www.listaintl.com     Luke Engineering & Mfg. Co. 456 South Blvd. Wadsworth, OH 44281 330-335-1501; 800-624-6943 www.lukeeng.com     Mahle Clevite 1350 Eisenhower Place Ann Arbor, MI 48108-3282 734-975-4777 www.engineparts.com     Mac Tools 505 N. Cleveland Ave. Westerville, OH 43082 800-622-8665 www.mactools.com       Medina Mountain Motors 199 Factory St. Creston, OH 44217 330-435-6236 www.medinamountainmotors.com       Melling Select Performance P.O. Box 1188 Jackson, MI 49204 517-787-8172 www.melling.com     MSD Ignition 1490 Henry Brennan Dr. El Paso, TX 79936-6805 915-857-5200 www.msdignition.com     Ohio Crankshaft 5453 South State Route 49 Greenville, OH 45331 800-333-7113 www.ohiocrank.com       Professional Products 12705 S. Van Ness Ave. Hawthorne, CA 90250 800-478-5441 www.professional-products.com     Pro-Gram Engineering Corp. P.O. Box 472 Barberton, OH 44203 330-745-1004 www.pro-gram.com       PRW (Performance Racing Warehouse) 193 West Orangethorpe Ave. Placentia, CA 92870 714-792-1000 www.performanceracingwarehouse.com     Ross Racing Engines 1763 N. Main St. Niles, OH 44446-1277 330-544-4466 www.rossracingengines.com     Royal Purple Ltd. One Royal Purple Lane Porter, TX 77365 888-382-6300 www.royalpurple.com     Saeco Enterprises 495 E. Bergey St. Wadsworth, OH 44281 330-334-3271     Scat Enterprises 1400 Kingsdale Ave. Redondo Beach, CA 90278-3983 310-370-5501 www.scatcrankshafts.com     Snap-On Tools 2801 80th St. Kenosha, WI 53143-5699 262-656-5200 www.snapon.com     Summit Racing P.O. Box 909 Akron, OH 44398-6177 800-230-3030 www.summitracing.com       Tin Indian Performance P.O. Box 1162 Uniontown, OH 44685 330-699-1358 www.tinindianperformance.com       Trend Performance 23444 Schoenherr Warren, MI 48089 586-447-0400 www.trendperform.com       Trick Flow Specialties 285 West Ave. Tallmadge, OH 44278 888-841-6556 www.trickflow.com     Tuff Stuff Performance Accessories 9004 Madison Ave. Cleveland, OH 44102-2715 800-331-6562 www.tuffstuffperformance.com     Valco Cincinnati CP, Inc. 411 Circle Freeway Dr. Cincinnati, OH 45246-1284 800-788-3865 www.valco-cp.com    

Like what you're reading? Subscribe to our E-Newsletter!