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  6-20-08

       

 THANKS TO EVERYONE FOR TEN YEARS OF "ACCELERATION LIKE A MOTORCYCLE" -  WE ARE NOW SOLD OUT OF NEW UNITS.

 CLICK HERE FOR THE NEXT BIG THING

PRODUCTION OF COMPLETE HEADS HAS  ENDED . NO MORE WILL BE MANUFACTURED.

Riley Two Port tm

 PLEASE CALL (513) 724-0700 FOR INFORMATION

We'd be glad to speak with you (513) 724-700 (OH).

THE MOLDS HAVE BEEN RETIRED

 THIS PAGE WILL ALSO GO DOWN IN A FEW WEEKS.

RILEY SPARE PARTS & GASKETS WILL CONTINUE TO BE MADE AVAILABLE

6.5% Ohio sales tax to Ohio state residences only.

 

 

Riley Two Port (tm)

The Complete Kit Includes All Cylinder Head Parts, Fully Assembled & Tested.

 Engine built by Bob Baas’ Engine Shop in Alexandria, MN for Ron Limrick of Thunder Bay, Ontario, Canada. Model B Ford featuring a Riley Two Port, and a Robert Roof dual updraft intake with a pair of Model B Zenith carburetors.   Well done guys!

Customers are encouraged to send in your engine photos.

Can ship with 2 week lead time.

FREE literature and assembly manual -  please call 513-724-0700.

 

 
 

Generally speaking, the head is a bolt-on out of the box after cleaning and painting (polishing and porting if desired). Two men can install the head in a weekend after the block is prepped. The set-up is easy and uncomplicated using common automotive tools.

 
     
  Cast Iron "F" Type Head; Modern Valve Train, 3 Per Cylinder;  Two Compression Ratios 6:1; 7:1 and 13 Precision Castings.

Produces Over 105 HP* at the wheels "Out Of The Box". Not bad for a four banger that had 40 HP from the factory.

Several Optional: Side Plates,  Up & Downdraft Manifolds, Crank Pulley, Water Pump Adapter And Much More.

Proudly Made in U.S.A.

Full 30 day Warranty On Parts & Labor. I Stand behind every head built & shipped, Period! Charles H. Yapp

Simply, One Of The Finest Speed Products Ever Produced For The Ford 1928 to 1934 Model A & B

 

 

The Riley Two Port has three valves per cylinder: 2 intake valves in the head, for each cylinder  and one exhaust valve in the stock location in the block. The unused intake port hole is used as the new pushrod hole. Polishing Not Included. Prices & specs subject to change w/o notice. 7% Ohio sales tax to state residences.

 
 

Please keep in mind that we stock all replacement parts for the R2P including parts that fit original heads

 
 

Riley Two Port SPECIFICATIONS

Note: most parts are fully interchangeable with original Heads

The Riley Two Port is a faithful reproduction of the original Riley Dual-Valve-In-Head made from 1929 to 1932 for the Model "A" & "B" Ford. Our new model is the rare 1929 "first version", with the spark plugs on the driver's side. The Riley Two Port is a powerful, efficient and reliable 12 valve OHV "F" head (8 intakes in the head and 4 exhausts in the block) that more than doubles the horse power, runs cooler, gives better gas mileage, accelerates like a motorcycle (sm), is fully oil pressurized, fully adjustable and fits under the hood without modification. Because it is authentic cast iron, you will not have adverse corrosion or expansion problems like you would with a soft aluminum head.

Your Block: For normal road driving and cross country touring, use a stock Model "A" or "B" Ford four cylinder block (1928-1934). The block should be rebuilt. Babbitt bearings are fine, insert bearings will last longer. Use the stock oiling system and rods. We recommend a counter balanced crankshaft and a metal timing gear. Your exhaust valve train, and four intake adjustable tappets must be in place.

COMPRESSION RATIO: All R2P heads are now delivered with a 1/16" deep circular fly-cut above the cylinders. This is to help insure that pistons do not touch the combustion chamber. The fly-cut depth also controls compression ratio and cc's of chamber volume. We offer a 136cc version with a 1/16" fly-cut depth (+ - 7:1CR @ standard bore) and a 151cc version with a 1/4" fly-cut depth (+ - 6.5:1CR @ standard bore). The thickness of the gasket plus the fly-cut should give adequate clearance, but the owner must double check this piston to head fit prior to use. Some engine rebuilds have the pistons higher than flush with deck, which increases CR. Oversized cylinder bores increase CR. Example: our 136cc version is 7.36:1CR @ .080" overbore, with flat top pistons, flush with deck and our gasket. Our 151cc version is 6.8:1CR @ .080 oversize. PERSONALLY: I think the 7:1 is the sweet spot for HP and performance. 8:1CR doesn't show much dyno gain on the street. 6:1 is there for you if you need a physiological edge or have an older engine.

Customers needing higher CR's can order head without a fly-cut and a re-decking up to 3/8" milled off.  Ratios approaching 10:1+ are possible.

Customers needing lower CRs  will need to machine material off each piston's top or obtain pistons with custom pin centers or have rod bearing center changed. 

Combustion Chamber: Roof surface is now partially machined to improve CR accuracy and appearance. Surface is "blanchard ground" for extreme flatness.

Wire Groove: Each head is grooved 2-1/4" between cylinders 1 & 2 and 3 & 4 for a stainless steel FIRE WIRE to improve gasket clamping.

Head Gasket:

NEW UP GRADE:  HIGH(est) TECH "GRAPHITE-STEEL-COPPER" COMPOSITE  HEAD GASKETS with copper fire rings. A special polymer coating on both sides melts into the small capillary scratches on the head and block and stops water leakage. These are excellent Riley Two Port Head Gaskets. . . . The best we have ever offered.  I honestly feel these special gaskets have made the Riley Two Port a product to recon with. I by these in bulk and I think I have the lowest price in the community. I have my name stamped on each gasket to show my approval. Everybody should carry a spare gasket with them, but these babies very seldom blow or leak. I trust them. Buy 2 at a time and save an extra $5 and an extra $12 shipping (save $17 in all) and even more compared to other dealers and shops.

Gaskets: 1 head gasket, 2 Intake manifold, 1 water pump,  2 fire wires, and OHV cover gaskets supplied.

Head Studs: Special length (3 different) studs are grade eight rolled threads. The very best available. Nuts are grade eight. Our studs are custom made in the finest grade 8 materials available.

Camshaft: A Model "B" camshaft is excellent for most touring, near stock idle and fast road driving. Our "Scalded Dog" camshaft special regrind for surprising highway, touring and hill climbing performance. Almost any performance cam grind can be used, but those with stock or just slightly more lift at the intakes and 355 degrees (+ -) of duration seem to work best. Remember the Riley uses two intakes per cylinder, so lift, while very important, isn't as important as in a flathead.

Intake Port Covers:

We supply two per head, aluminum "port cover" that read "RILEY", can be polished. Used to cover unused intake ports on side of the block.

Intake Manifold: OPTIONAL: Choose from: Dual or Single down-draft uses Stromberg or Holley three bolt carburetors;  We can supply manifolds to hold almost any number and type of carburetors: Single, doubles, triples, up or down-draft. Inquire.

Exhaust Manifold: Use the stock Ford cast iron exhaust manifold or a "flathead" type four tube exhaust header.

OPTIONAL: Riley Two Port matching lower valve cover side plate in "A" or "B" style. Inquire.

                     

Valve Train: Modern 1.535" diameter, straight shaft, stainless steel, two per cylinder - eight per head installed. Heads are ready for no-lead gas.

EXHAUST VALVES: are in the stock position in block. Stock sizes work well. Our larger 1.730" exhaust valves can be use to great advantage. Large exhaust valves are not in the kit and if used will require additional block machining. Consult with your engine builder.

Rocker Arms:

 

Our NEWEST UP GRADE: cast DUCTILE IRON Rocker Arms. These new arms have been developed to include full adjustability for both Intake Valves at the arm and are loaded with two needle bearings each. Sold separately for owners of older models.

Rocker Stands: are 356-T6 aluminum. These precision machined stands are an exact replacement for all original and repro Two Ports. They feature trick internal oil pressure lines and rocker shaft lockers.

 

Rocker shafts: are hardened steel precision machined, pre-drilled for oil pressure and a special locker groove. Made by us.

Valves: Modern straight stem. 8 installed in the head

Springs: Model A, eight per head. Normal stock tension.

Keepers: Modern 2 pc lockers.

Valve Guides: Modern one pc solid bronze

Valve Plugs:

All heads are now supplied with four billet aluminum Valve Plugs. These are to be press fit into the valve guide and old valve seat of your block. The final installation is usually done by a machinist, at the time the block is decked. The Plug should be either dead flush with engine deck (machined with deck) or "just" below the deck with engines that have already been decked. These optional use Plugs improve oil return and give additional gasket support. When rebuilding the engine we recommend that hardened valve seats be cut for all 8 seats, but installed in the exhaust only. The new Valve Plug is then machined to fit the new valve hole and pressed in.

Valve Covers:

Our new tooling has the name "TWO PORT RILEY" de-bossed on the top in large clear letters that will not polish off. The gasket supplied is a quality "U" channel neoprene gasket. The covers are 3/8" higher than stock cover to give better clearance to the rockers.

Spark Plugs: Spark plug holes bored and threaded for 14mm, 3/4" reach, flat seat plugs. Not supplied. Start with a cold plug.

Studs: We supply aircraft quality grade eight head studs with rolled threads. The very best and strongest.

Push Rods:

Adjustable solid push rods with 1/2" dia. adjusters. We make these from scratch. Our tappet seat bolts are supplied. You must supply "single locker" adjustable tappets.

Water Pump: Is the stock 1928 to 1931 Model "A" water pump with a "locating collar" installed on the shaft. There will not be a shaft locator boss inside the cylinder head. This was done to improve water flow. Collars are available from most dealers. Most owners report their head’s are running exceptionally cool and some have changed thermostats to rise the temp. OPTIONAL early Ford V-8 water pump adapters and water block off plates available (shown below).

Water Gooseneck:

Cast 356-T6 aluminum special fit around valve covers. Fits all years.

Distributor:

Each head is shipped with a "RILEY" Distributor Riser part, 356-T6 aluminum, fully machined and a longer distributor driveshaft. This extension will raise your Model "A" or "B" distributor up two inches so the stock "wing" caps and the Model "A" spark advance will clear the valve covers. Mallory, "FS Ignitions", magnetos and many other distributors with Model "A" machined shanks will fit. Distributor Riser must be sealed with silicone sealer between it and the head. No gasket, just a touch of sealer. A thin paper gasket can be fabricated if desired.

Distributor Drive Shaft: The shaft has been made approximately 1/4" longer. This is due to variances at the drive gear assembly, engine deck machine depth and other factors. Simply grind an equal amount off each end to get to the correct length for your engine.

Oil Pressure: Each head is "trick" machined to feed low pressure oil to the head and rocker system. Oil returns to the engine block via the pushrod channels. This will effectively oil the R2P valve train along with the low pressure feed to the rocker shafts and rocker arms.

Shipping: Each head will be assembled and packed for safe shipment by UPS. Shipping/crating costs payable in advance and is $95.00 (USA). Overseas shipping available.

We stock replacement parts for all original and repro Riley Two Ports.

 THERE IS A $100 CANCELLATION FEE

Every Buyer Must Sign a "Release and Hold Harmless Agreement" before head will be shipped. Copy sent on request.

WARRANTY: Yapp Studios, Inc. warrants for thirty (30) days that the workmanship and materials of the Riley Two Port are as represented. If the head is modified in any way whatsoever the warranty is null and void. When you receive your head, inspect it, if it does not appear correct, call us and we will arrange for a full refund, repair or exchange. This product makes increased horse power and is used as an automotive racing product, therefore no other warranty is expressed or implied. The warranty is non transferable. Having said that, be assured that we stand behind all our products and will get you on the road.

 
 

 

***Horse Power varies with equipment used and to the extent that "speed secrets" have been applied. We have reports of HP ranging from a modest 80 HP to a screaming 125 HP. All tests were conducted on "rear wheel dynos" by customers, where a 25% loss of  HP is common, compared to engines mounted on actual dyno stands. A properly set up Riley Two Port on gas, using common tricks of the trade, should produce at least 105 hp on a dyno stand.

 

 

SCALDED DOG SPEED PARTS

513-724-0700

3860 CAIN RUN RD, BATAVIA OH 45103

(513) 724-0700 M-F 9am to 5pm - 24 hr

Fax (513) 724-0700

EASTERN TIME ZONE

  CLOSED WEDNESDAY AND WEEKENDS

EMAIL: CY4FN@AOL.COM

 

 

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