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There might be ONE
(1) left after all promised product is shipped. Please call.
RILEY PRODUCTION UPDATES:
9-4-2013: Castings (iron
and aluminum) have been ordered. Machine shop has been advised and we
are penciled in for production.
9-10-2013: Sold out all
pre-ordered castings this morning! Have upped the Riley order by 5
Riley heads still available.
iron head castings and rockers were delivered to the Chicago machine
shop 10-14-2013. Valve covers, goosenecks, rocker stands were
delivered to my shop the same day. There will be a short waiting
period until all prints and instructions are set and the shops get us
all heads today. Thanks so much to all of you. I have set aside one
(1) extra head as backup if something should get damaged in the
various shops and processes.
11-22-13: Meeting will
be held in Chicago to work through the project. Still on schedule.
11-26-13: Meeting with
GPM Machine was good and schedules have been made. No issues to date.
February delivery to us and assemble here on receipt and ship to
customers as soon as all is boxed.
CALL ME . . .
YOUR DREAM COULD COME TRUE.
513-724-0700 (OHIO, EST, 9-5 M-F)
THANKS TO MY CUSTOMERS FOR
15 YEARS OF "ACCELERATION LIKE A MOTORCYCLE"
744 Sold Around The
Riley Two Port Cylinder Heads!
sales tax to Ohio state residences only.
24 hours & 7days a week
Blue engine built by
Engine Shop in
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!
Riley Two Port
RILEY SPARE PARTS &
OFFICIAL GASKETS ARE AVAILABLE
PLEASE CALL (513)
724-0700 FOR INFORMATION
The Complete Kit Includes All
Cylinder Head Parts, Fully Assembled.
Customers are encouraged to send in your engine photos.
FREE assembly manual
available as a PDF file by email - Just ask.
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 Valves Per Cylinder; Compression is 138 cc (+-) Ratios
= 7:1 and
includes 13 Precision Castings and Most Parts Needed To Install.
Produces 80 to 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 Parts : Side Plates, Up &
Downdraft Manifolds, Crank Pulley, Water Pump Adapter And Much More.
Proudly Made in U.S.A.
30 day Warranty On Parts & Labor. I Stand
behind every head built & shipped, Period!
Charles H. Yapp
One Of The Finest Speed Products Ever Produced
For The Ford 1928 to 1934 Model A & B
Polishing Not Included. Prices & specs
subject to change w/o notice. 7% Ohio sales tax to state residences.
Riley Two Port SPECIFICATIONS
Note: most parts are fully interchangeable with
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.
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.
Above is the NEW chamber. The
new chamber is about 98% milled to match the head gasket. The 2%
un-machined is around the gasket edge. This area was left "as cast" to
insure that the gasket fit properly.
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.
heads are delivered with a 1/16" deep circular
above the cylinders. This is to help insure that pistons do not
touch the combustion chamber. We offer a
150cc version with a 1/16" fly-cut depth (+ - 6.65:1CR @ standard
bore). Some engine rebuilds have
the pistons higher than the deck, which increases CR. Oversized cylinder bores
increase CR. Example: our 150cc version with @ .080"
overbore, with flat top pistons, flush with deck and our gasket is
If your pistons pop up .040" expect about 7:1 CR.
PERSONALLY: 7:1CR is the sweet
spot for Riley Two Port HP for overall street performance. 8:1CR doesn't show
much dyno gain at street level rpms. For compression changes in the
field: 1/64" mill equals 5cc and 1/16" = 20cc.
Customers needing LOWER CR:
Can machine material off each piston's top, Mill material
out of chamber, deepen fly-cut over piston (destroys squish effect -
not recommended), or obtain pistons with
custom pin centers. . . . we do not supply these services.
Combustion Chamber: Chamber
surface is now about 95% machined. Chamber design is subject
Wire Groove: Each
head is grooved 2-1/4" between cylinders 1 & 2 and 3 & 4 for a
improve gasket clamping.
HIGH TECH "GRAPHITE-STEEL-COPPER"
with copper fire rings. A special polymer coating on both sides melts
into the small capillary scratches on the head and block and stops
These are excellent Riley Two
Port (tm) 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.
1 head gasket, 2 Intake manifold, 1 water pump, 2 fire wires,
and OHV cover gaskets supplied.
Head Studs/Bolts: We provide 4 long
studs/nuts and 10 bolts. After years of experience we have found that
bolts make installing and removal so much easier.
SUPPLIED: A Model "B" camshaft is excellent for most touring, near
stock idle and fast road driving. 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:
Two per head, aluminum "port cover" can be polished. Used to cover unused intake ports on
side of the block. "Riley" brand available until stock is exhausted.
OPTIONAL: Choose from: Dual
down-draft uses Stromberg or Holley three bolt carburetors.
Use the stock Ford cast iron exhaust manifold or our new "Y" split
headers for even more HP gain.
OPTIONAL: Riley Two Port matching
valve cover side plate
in "A" or "B" style.
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. 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 about suitability for your block.
Rocker Arms. These new arms have been developed to include full
Intake Valves at the arm and are loaded with two needle bearings each. Sold separately for owners of
ROCKER RATIO is approximately 1.04:1,
which is nearly equal. Shaft center to adjuster screw center = 1.320"
and Shaft center to pushrod pad center line = 1.275.
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.
are hardened tool steel precision
machined, pre-drilled for oil pressure and a special locker groove.
Made by us.
Modern straight stem 1.53". 8 installed in the head
A, eight per head. Normal stock tension.
Keepers: Modern 2
Modern one pc solid cast iron
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
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.
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,
Not supplied. Start with a cold plug.
supply 4 aircraft quality
studs with rolled threads and 10 grade 8 bolts. The very best and strongest.
Adjustable solid push
rods with 1/2" dia. adjusters. We make these from scratch. Our tappet
seat bolts are supplied and screw into your "single locker" adjustable
Use the stock 1928
to 1931 Model "A" water pump with a "locating collar" installed on the
shaft behind the fan hub. There is no shaft locator boss inside the cylinder
head. This was done to improve water flow. Collars are available from
most dealers. Most owners report their headís 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).
Cast 356-T6 aluminum special fit around valve covers. Fits all
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
Distributor Drive Shaft: The shaft
has been made approximately 1/4" too long. 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.
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.
Each head will be assembled and packed for safe shipment by UPS.
Shipping/crating costs are $100.00
Overseas shipping available.
stock replacement PARTS for all original and repro Riley Two
PRODUCTION Started SEPTEMBER 2013
DELIVERY SCHEDULED MARCH 2014
THERE IS A $200 CANCELLATION FEE IF YOU CHICKEN
IF WE CAN NOT PRODUCE THEN YOUR DEPOSIT WILL BE RETURNED IN FULL
(NO INTEREST). ALL FUNDS ARE HELD IN ESCROW. AFTER CASTINGS ARE
ORDERED SEPTEMBER 1, 2013 NO REFUNDS CAN BE MADE.
Every Buyer Must Sign a "Release and Hold
Harmless Agreement" before head will be shipped.
by email or mail on
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.
Power varies with equipment used and to the extent that "speed
secrets" have been applied. We have reports of HP ranging from a
strong 80 HP out of the box, to a screaming 125 HP all tricked out. Tests were conducted on "rear
wheel dynos" by customers, where a 25% loss of HP is
common, as 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.
3860 CAIN RUN RD,
BATAVIA OH 45103
(513) 724-0700 M-F 9am to 5pm - 24 hr
EASTERN TIME ZONE
CLOSED WEDNESDAY AND WEEKENDS
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