super road rocket engine?

[ecose]

along with the possible spitfire scrambler i bought ( its still at the border) i dragged an engine out of a garden shed with the numbers
CA10R 4503     
       HHC

what is it anyone
thanks
kevin

[trevinoz]

Kevin, 
             I would guess that it is a 1957 Super Rocket engine. Possibly Road Rocket.
In 1957 Super Rockets were first manufactured in the EA7 frame, went to North America I think.
The best way to determine what it is is to check the crankshaft.
If it has 3 bolts holding the flywheel on, it is SR. If it has the heavy crank with no radial bolts, it is RR.
This assuming that it is all original.
The stamping "HHC" on this engine brings into doubt the claims over the years that the second "H" denotes a 357 camshaft.
It would be very interesting to pull this engine down.
Did you get it in the deal?

Trev.

[ecose]

no i bought it separately along with a Matchless G2  250cc  scrambler motor that was barely visible in the junk lying around
i will take it apart next week as my pan was to vaporblast / paint them and display them on stands that i weld up

[trevinoz]

Go on Kevin, find the rest of it and build it! You know deep down that you want to.   

Trev.

[ecose]

way to many before this one, Square 4, AJS X3, C15, T100, the possible spitfire scrambler, and more  ha ha

[ecose]

well it has a 356 cam, pistons with a very high dome and grooves all around the skirts,  no bolts on the crank and as i was reading on another post there is a date code on the bottom of the cases  6 1 57     the cases are a matched pair as they have the same numbers on each side at the front, dont know about the head yet or what to look for, cylinder is 67-1210
in the boxes of bits with the bike and 2 engines was a 357 cam, a TT9 carb, a pair of carbs 386/324 and 386/325 with only one float bowl,
6 wheels and a complete front end with a finned gold star hub i believe ( small holes and larger ones that you could knock out)
i find this all very interesting finding out about all these parts

[trevinoz]

Kevin, is it a small journal or large journal crank?

Trev.

[ecose]

how do i tell the difference

[muskrat]

The LJ has three bolts radially around flywheel the SJ has six around the inside of the flywheel.
Cheers

[trevinoz]

How about the RR crank which has no bolts, Musky?
It is large journal.

Kevin, measure one of the big end journals and I'm sure that we can work it out.

Trev.

[Rocket Racer]

The TT carb is a nice option, being a racing carb beautifully made with proper metals.
And a lovely bit of bling too.

[muskrat]

Looks like I'm headed for the corner with a pointy hat. I think my SJ pic is one of those RR cranks. Doh.
Cheers

[ecose]

No bolts on the crank, journal is 1.667  or 42.36mm  so i guess its a road rocket crank, is that good bad or indifferent
how about the head, what should i look for
thanks for your help guys

[ecose]

just found numbers under the single intake   67-1126 - S
intake valve 67-958
ex valve       67-957
theres a good bit of corrosion in the head so i guess i will make this engine a static display engine for my shop, doubt ill be allowed it in the house