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 10-30-08

New Cylinder Head Under Development.

 

 Roof 101 FOUR PORT OHV

For The Ford 1928 to 1934 Model A & B

An Improved reproduction of the 1929 Robert M. Roof, R&R Cyclone OHV

Photos of original cylinder head shown below for general information only.

Our new improved version will be a four port design, where each rocker box will have 2 intake ports.

A special "log" manifold will come with the kit. As time goes along look for updates, drawings, prints and new specs.

Photo of original cylinder head shown above for general information only.

The Complete Kit Includes All Cylinder Head Parts, Fully Assembled, Tested and Dyno'd

 
 

 ARE YOU INTERESTED?

Photo of original cylinder head shown above for general information only.

GET ON THE WAITING LIST ASAP . . . AT LET US KNOW YOU MIGHT BE INTERESTED.

 

 
   

AN ESCROW ACCOUNT WILL BE CREATED TO HOLD MY INVESTMENT AND THE BUYER'S INVESTMENT. IF 30 PEOPLE (MINIMUM) SIGN UP WITH $1500 DEPOSITS BY December 15TH 2008 THEN THE PROJECT IS A GO AND PATTERN MAKERS, FOUNDRY AND MACHINE SHOP  WILL BE HIRED. A TIME ESTIMATE FOR COMPLETION IS ABOUT 1 YEAR.  IF THE PROJECT DOES NOT GO FORWARD ALL FUNDS WILL BE RETURNED (NO INTEREST).

 

 
 

 

 

ROOF 101 OHV SPECIFICATIONS

The ROOF 101 is a faithful reproduction of the original cast iron 1929 R&R Cyclone OHV cylinder head made from 1929 to 1950 for the Model "A" & "B" Ford. We believe this was the first OHV Model A Ford cylinder head that made it to market. Our model is the rarest 1929 "cast iron version". The ROOF 101 is a powerful, efficient and reliable 8 valve OHV "F" head, four 1.73" diameter intake valves, with 1.5 rocker ratio, in the head and 4 exhausts in the block, that more than double the horse power, runs cooler, gives better gas mileage, acceleration will put a smile on your face. It will be 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 heads. . . .  This new head will incorporate design changes to improve air flow, valve action, cooling, and stability. . . 

  

Photo of original cylinder heads shown above are for general information only.

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 fresh. Babbitt bearings are fine, insert bearings will last longer. Use the stock oiling system and rods. We recommend a counter balanced crankshaft and a bronze timing gear. Your exhaust valve train, our valve plugs and your "single locker" adjustable tappets must be in place at the intake positions.

Compression Ratio: We plan on offering a 137 cc version (+ - 6.5:1CR @ standard bore). Roof 101 OHV heads will be 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. For higher compression you may mill the deck at your end. The thickness of the gasket plus the fly-cut give adequate clearance.  Some engine rebuilds have the pistons higher than flush with deck, which increases CR.

Combustion Chamber:   . . . it will not look like this original version!

Photo of original cylinder head shown above is for general information only.

The new chamber will be CNC machined. Each chamber matches exactly each other in shape, size and cc's. Each will have plenty of "squish" area. The intake valve is centrally located and one spark plug enters from left side. Turbulence grooves will be added to improve combustion turbulence. The chamber is a modified "wedge", as the valve will be positioned at and angle of about 22 degrees. These specs are subject to change.

Head Gasket: HIGH TECH GRAPHITE-STEEL CORE-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 "F"  Head Gaskets. . . . The best we have ever offered.  I buy 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,  I trust them.

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

Head Studs: Our own custom made grade 8 studs.

Camshaft: Best choice to be determined. A Model "B" camshaft should prove excellent for most touring, near stock idle and fast road driving. Almost any performance cam grind can be used.

Intake Valve: The ROOF 101 uses one large 1.73" intake per cylinder. Additional machine stock will be present to use larger valves and mill out port throat.

Rocker Ratio:  The rocker ratio is 1.5:1. Rockers will be interchangeable for higher ratio and roller tips, etc.

Rocker Arms:  Chevy small block system of rocker arm mounted on a stud.

Intake Port Covers: We supply two aluminum Port Covers per head, that can be polished. These are used to cover unused intake ports on side of the block and will be inscribed with a Roof logo.

Intake Manifold:  We are still designing this unit. It will probably be designed so that it can be used either as an up-draft or down-draft. We are thinking that the log style manifold will have three oversized square carburetor mount boses for down or up-draft use. An adapter ( for 1, 2 or 3 carbs)  will be required for your carburetor of choice (Winfield, Stromberg, Holley, Weber, Zenith, etc).

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

Side Plate Valve Covers: To be designed.

Exhaust Valves: are in the stock position in your block ("F" head design). Stock sizes work well. Our larger 1.730" exhaust valves can be use to great advantage.  Consult with your engine builder.

Rocker Boxes:  Precision machined cast boxes feature trick internal oil pressure lines.

Valve Plugs:

All heads are supplied with four billet aluminum Valve Plugs (available ahead of time). These are press fit into the valve guide hole and into the valve seat of your block. The final installation is usually done by a machinist.  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. The Plug should be either dead flush with engine deck (machined with deck) or "just" below the deck with engines that have been pre-decked. Unlike the Riley 2 Port these Plugs are required for oil return and push rod control and give additional gasket support.

Valve Covers:  Cast aluminum

Spark Plugs: 14mm, 3/4" reach, flat seat plugs.

Push Rods:  Custom made.

Water Pump:  Model B Ford. These are now being made new.

Distributor:  Any distributor used for Model A or B Fords will fit.  We are considering providing a "riser" to lift you distributor higher so that the stock manual advance and wing cap will clear the covers..

Distributor Drive Shaft:  New custom length and supplied.

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

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

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

Proudly Made in U.S.A.

$1500  Down + $95 SHIPPING    THERE IS A $100 CANCELLATION FEE

Final cylinder head price will not exceed $2450.00 for the first round of units.

Some small parts and optional parts may be extra.

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

Sample copy sent on request.

6.5% Ohio sales tax to Ohio state residences only.

WARRANTY: Yapp Studios, Inc. warrants for thirty (30) days that the workmanship and materials of the ROOF 101 Cylinder Head 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.

 
 
 

I would enjoy speaking with you about the Roof 100 !

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

  WE'RE MAKING HISTORY. ARE YOU DRIVING IT?

 

 

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