A bit of a saga
Hannover with Steve Turley
It all started around 2010. I had been running a 10cc car for a few years and was enjoying the racing. The 10cc cars are always last to run so it seemed a good idea to have a morning car. The 1.5cc cars seemed a bit small, I didnít fancy a Class 3b car so I settled on a 2.5cc car. You will see from this picture that my hair is still dark.
|Sepp NSC car||Turned round Picco|
About that time Mart Sepp advertised a new range of tether cars for sale on "speedmodelcar". I contacted Mart and ordered one, the next problem was an engine and pipe. I ended up turning round a Picco 15 and for the pipe I copied Horst Denneler's 2.5cc pipe. The car got its first run in Kapfenhardt 2011, it went round, and did a speed of 179.4 kph. Its next outing was Tallinn in the same year, 166kph. At the time I was still racing my 10cc car and the 2.5cc car very much played second fiddle and it was also a bit of a disappointment around a 100kph short of where I wanted it to be.
A bit of light appeared at the end of the tunnel, Horst Denneler had some 2.5cc Picco based engines made, I bought one of those and fitted it to the car. From my notes, I am not very good at putting the dates in but the car with the Denneler engine had its first run in September 2011 at the Orebro track, it achieved 222kph, a big step forward. That was its last outing of that year although I raced the 10cc car in Lyon.
The car with the Denneler engine in
The shut-off in the car is a flood-off type, you only get one chance per run. Note the external vent on the tank, Mats Bohlin's influence. Mats had taken me and my 10cc car under his wing and I was at last making progress with the 10cc car. I ignored one bit of his advice, donít run 2.5cc cars, they are difficult.
The 2.5cc car got its first outing at Kapfenhardt 2012. It did 2 runs, the best being 234kph and one run too rich. I probably didnít put much effort into this car, I broke the British 10cc record twice that weekend.
According to my notes I changed the balance of the car and changed the pipe length. Next outing was Vilnius, the modifications worked, 245 kph first run and 38,815 rpm, getting somewhere. For the second run bigger tyres, it blew the plug and the third run it did 258.73kph with a couple of laps at 260kph, 39,185rpm. I was happy, and I managed 100.35 kph in the horsing competition and placed 15th.
The last race of the season was Orebro. It was cold, 8įC, and wet and the car didnít like it, blew plugs. I put on smaller tyres and altered the compression. The best I got out of it was 249.673kph.
Over the winter of 2012/13 I made a new, conventional shut off for the car (above) that would give me the option of being able to shut the car off, change the setting and push it off again, unlike the flood-off version it had.
Denneler motor with new front housing, and original version
Also, I put a new front end on the Denneler engine, the crankshaft didnít spin freely in the bearings as there was a tiny amount of misalignment. The new front end cured it, I also bought a spare engine.
The first race of the 2013 was Kapfenhardt. The car managed runs of 211 and 239kph and new liner piston required.
Tallinn was not much better, 245kph, and onto Basel, 235kph, it's just getting worse.
For the race in Hannover I had bought an aluminium Stelling pipe. I ran both the old and new engines, both ran within 1 kph of each other in practice, best the car managed 242kph.
In the mean-time I had bought a new 3.5cc Sepp car with a Novarossi turned round by Stelling.
The last race of the 2013 season was Lyon. I went with three cars 2.5, 3.5, 10cc, I must have been a glutton for punishment? The 2.5cc car did a season best of 247kph, the 3.5cc car went round and the 10cc car, I bust the engine at 298.8kph.
We had taken our son Aaron to his first race as a spectator. I paid for his flight and hotel and told him he had a to buy his own beer. He enjoyed it and was made very welcome by the tether car community.
|Extensively re-engineered 1.5cc car||Digital timing device|
I had bought an old Stan Barrett 1.5cc tether car and spent a lot of the winter rebuilding it. You will notice it has Aaron's racing number on it, but thatís another story. I also made gadgets but did nothing on the 2.5cc car.
Hannover May 2014
I am still running the 10cc car, the 2.5cc car did 243.78kph in round 1. The second round it was rich and the third the timing system failed, I was offered another run but didnít take it.
Kapfenhardt- I ran the newer 2nd engine, I have written quite a bit in my note book, the gist of it is that it accelerates up to speed, then slows down. It did it all three runs, best speed 236kph and it was rich. I bought a Gado 2.5cc engine and a spare liner piston.
Vilnius- I ran the car in practice but found metal in the head. The 3.5cc car went well for the first time, 234.4kph new British record. On the second run of the 2.5cc car it would not go over 170kph. I had the exhaust timing at 197.3 degrees, maybe too much. I rebuilt the No1 engine after the race with more modest exhaust timing, 195.6 degrees.
Hannover- the 2.5cc car is stuck in a rut around the 240s kph. I had worked on the 3.5cc car now up to 271.338kph.
Pila- neither of my cars would run would run well the best was the 3.5cc car at 235kph. The highlight was Aaron winning the 1.5cc class Grand Slam prize in his first season, a return ticket to Australia.
After the race I made two steel pipes for the 2.5cc car and reduced the exhaust timing to 192 degrees.
The last race of the season was Tallinn. The car did two runs, one of 229 and a 244kph, still stuck in a rut. I placed 3rd in the 3.5cc class very happy with that result. Tallinn is very competitive for the small classes.
To be continued