History German factory hot rod 1914, 4-Banger, 750ci, 4-valve-technique. Complete restauration.

12.3 litre Opel race car "Green Monster"
Full restauration keeping the original cylinder block from 1998 to 2001.
Due to irreparable leaks a new complete cylinder block was cast under our project management in 2006.
All digitalizations, preparation of parametric data and constructions were instructed by us and partially carried out at Adam Opel AG.
The further processing of the cast blank was also conducted under our direction or directly by us.
Weaknesses in the construction resulting from the historical cir***stances were eliminated without changing the characteristics of the engine.

The two part crank case, the crankschaft and the connecting rods have been also remodelled.
The crankshaft is designed as a built in shaft. Changing the crank pin and the connecting rod bearing is now possible when installed.
The oil pump was built on the existing model reinforced by a second going the opposite direction, thus creating foundation for compressed lubrication.
--> Here are some pics

Driving at an event in todays traffic:

Gruenes-monster-1914 by Steffen Jobst posted Sep 17, 2016 at 10:58 AM

1

 

Very cool!

 

Your car is awesome!!!...totally groovin' on that look!....I'm very impressed!

 

Stop! This is not my car. It's part of the historic Opel-collection in Rüsselsheim.
The owner of the shop who made the restoration, is a friend of mine.

 

Thanks for sharing Steffen, what a huge undertaking that was...big money I would expect!

 

Yes it was big money. But worth every cent!

 

Thanks for the clarification....great car, ...and compliments to the owner!

 

The valves sticking out of the hood are awesome. Neat car, well done on the restoration!

 

Amazing fabrication and beautiful car.

 

Watching the valves while driving must be hypnotic...must be automatic intakes?

 

engine, wheels and not a lot else that wasn't deemed essential. Looks fast standing still. Amazing restoration!

 

Steffen that is one beautiful car. You know you are driving something when you see the valves moving, hear the clatter of the lifters and the whine of the gearbox, amazing.

 

Opel had a very interesting history and I believe it was one of Germany's biggest car manufacturers in the early 1900's. What a great looking car and it must have been a joy to drive. A true time machine.

 

No, pic 52 or 53 shows single OHC with roller rocker arms..

 

Hi Steffen

Nice resto job, i'am, interested in that strange valve train on how the roller rocker opens the valve

Looks like a 'Y ' end open's the valve right above the valve head, do you have any pics of them outside of the engine

Thanks, DND

 

Magnificent. Thank you for sharing.

 

Yes, wraymen, the Opel history is amazing. And they were the biggest car maker. Because of this GM baught them in 1928!
If someone of you comes over here to europe: Do not hes***ate to contact me!
I will give you a wonderfull sightseeingtour in Rüsselsheim.
Perhaps you must bringe with you some parts for my car ...

Sorry, D.N.D. there are no pics from inside. These are the only ones I have.
Difficult job by the way because cylinderhead and engineblock are one piece.

 

By the way: I love the two front springs and I'm very happy, that my 29 Chevy has the same suspension-layout.
And I will NOT switch to any Ford axle!

 

Found today:
The Driver of the car. And his Trophies in 1955.


And now "promotion of young ...". I love this pic. The young guy won the German Soapbox Championship and is now on the way to the the World-Soapbox-Finals in USA. Mr. Jörns gives him at the airport some last driving-tipps
In the background: the green monster.

 

Interesting, Most of the earlier pics you posted show the car with Continental Whitewall Tires
What a gorgeous car!!

 

Very cool, what year was the bottom picture? I want to look up how the kid did in the finals.

 

The subline only says "Beginning Sixties". But they sended the winner every year to the US.

----
Soapboxracing Germany >>>>

 

You have have a match race with this bomb at Sinsheim

 

No!
The Sinsheim-Nonsense is a boring American LaFrance fake with no history.
https://de.wikipedia.org/wiki/Brutus_(Experimentalfahrzeug)

 

This would be a match:

 

^ One of my favorite videos posted on the Hamb. Preceded only by the initial start up video of the same car.

 

Perfekt Video! I wish everbody would produce such a nice presentation of his car. What a pleasure to watch and HEAR!