Secrets Of Speed Society
Rocket 428 Speed Head
Updated 7-5-2020    
7-5-2020  NEWS:  Casting right NOW . . . get your deposit in NOW please!!
Introduction price limited to first 30 orders.
Price $725.00, Introduction price only to those with $400 pre-order deposit.  
Price for late orders is $785.00 each + options.
Balance due by ship date TBD  (Early Fall 2020-ish).
 7:1 CR, each head machined for 8 spark plugs, delivered with 4 custom made spark plug block off seals.
Optional: Machined to accept the Water Thruster Pipe add $75.00 Plus $185.00 for the pipe: Total $260 (see mock up image below).
Optional: Different CR will be considered. Fly-cut can be deepened or removed . . these are special orders and may have higher pricing. 
Ask for a quote.
PAYMENT: NO CARDS or PayPal, thank you! 
Send DEPOSIT Checks Only Made out and mailed to:  . . 

YAPP STUDIOS INC, 
3860 CAIN RUN RD, 
BATAVIA OH 45103
Include your EMAIL to receive an INVOICE receipt or ask for a hard copy mailed.
Overseas buyers please contact me for arrangements.
The Water Thruster Pipe is designed to fit the the Rocket 428 Speed Head.
It can be fit to other engines and cylinder heads . . . Think V8-60 and 4 cylinder aircraft and more.
See Mock-Up below.
Important details
ON A DARK AND STORMY NIGH IT'S RUMORED that this is the very same speed head that Flash used to power his rocket thrusters for his exciting trip to Mars in 1932 or was it 1938?  On return to earth the enthusiastic crowd overran the space station and the Rocket 428 was purloined from the engine room and forgotten until now.  While going through stacks of old musty " Space Agency" secret blue prints, Charlie Yapp found what he was looking for. . .  And here it is . . .  Because you and I want to have more fun than the other guys!
FEATURES: 
Fits all Ford Model A, B, G28T, Gaz, British & Canadian engines 1928-1934
356-T6 fine grained aluminum casting. Polish-able.
7:1 compression ratio (CR) with 6.5:1 CR optional.
Eight (8) spark plug capable for DUAL spark ignitions.
Ships with four (4) spark "plug seals" to run with SINGLE spark ignitions.
Light weight estimated at 24-26 pounds.
Use stock stud sizes and Model A water pump or V-8 pump adapter.
Water port, top rear, for temperature gauge or heater.
Uses any carbon-fiber-over-steel Model B Ford head gasket (we sell).


COMBUSTION CHAMBER:
Accepts large intake and exhaust valves up to 1.750".
Round 3.98" dia. X 0.060" deep fly-cut protects your pistons.
Runs naturally cooler.
Exact same chambers as the retired Lion Speed Head IV . . proven superior performance.
Expect 65 to 75 HP out of the box . . depends on parts employed.
110 HP or more is easy to attain if you know the "secrets of speed".
Chambers surrounded with extra metal to hold heat.
Spark plugs on side at 45 degree (prime default) produce more HP, than over the valves, with a best of class flame front.
Dual Spark ignition produces even more HP and cleaner burn.
Mock up image: Product not available until later in 2020.

The Rocket 428 Water Thruster Pipe adds a lot of interest and bling to your Rocket 428 cylinder head setup. The 356-T6 aluminum casting is designed to bolt onto the Rocket 428 cylinder head (an option that must be ordered ahead). If you go this route it will be special.  The WTP sells for $185 plus shipping. The pipe is pre-machined for mounting and ready to rocket.

The WTP fits other engines like the Ford V-8 60 and others.  This is a good fit for the Ford Powered Pietenpol aircraft too. It could be installed backwards too.
4-29-2020  . . .If you have been here before hit the refresh in your browser to be sure to see the latest.
Call or email to get on the list . . No obligation at this point. Deposits will be required when casting begins.

The Rocket 428 Speed Head has  8 spark plug capability and ships with 4 custom made spark plug hole plug/blank offs.
Note there is a tapped hole in top right corner for 1/2" npt plug or  temperature probe or hot water heater.
Note: The machine work, fully machined chamber shapes and water jacket are the same as was on our famous but retired Lion Speed Head.
Combustion Ratio:  Should end up at 155cc(+-) which is about 6.5:1 CR with a 0.080" over-bored engine. 
It has a 0.060" deep fly-cut over the pistons. Milling the head can create higher combustion ratios up to about 10:1.
Weight: about 26 pounds
Performance: Expected to be the same as our old Lion Speed Head, which mean more than the others!! 
Potential from 75HP to over 110HP.
PRICE: UNKNOWN  . . .  But I will stick my head out there and say around ????
WHEN:  Late 2020 to early 2021
Scalded Dog Speed Parts, 3860 Cain  Run Rd, Batavia OH 45103, USA . Phone (513) 724-0700, EST
[email protected]