
3 Doors Down's latest video - Let me be myself.
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Here are some shots I took of the Super Sport .21 O'Donnell engine earlier this week. Enjoy! :)








The cooling head is 60 mm in diameter...!
The SS .21 engine comes with a combustion head-button for turbo plugs. There is also a O'Donnell #97T plug included. Also included are a button for normal threaded plugs. As standard are two 0.15 mm brass shims installed for a total of 0.55 mm squish height with the turbo head-button and 0.7 mm with the same shims and the std head-button.
The brass sleeve is hard-chromed and has a simple and effective designed port layout with three intake ports and nicely (not huge = nice) exhaust port. There is no signs of any chrome burrs - very good. :)
The transfer ports are quite wide...
The booster port.
Piston and liner. It looks like the piston is not cast but billet type.
The con-rod is bushed at booth ends of course. Two oil-grooves on the piston. BTW, the piston has a completely flat top.
The crankshaft is 14 mm in diameter at the thick end and it looks cleanly designed. No silicone-ramp in sight that can come loose - nicers. :)
The crankshafts outlet so called "turbo-scoop" has a slightly different flow design then what most engines use.
Crankcase from above. Booster and one of the transfer channels are seen. The head is fastened with std M3.5x16 mm socket head (hex) screws.
The exhaust gasket in silicone seems to be of the std size. Thats good as all normal headers like fron Sirio, Nova & Hong Nor etc will fit. The crankshaft bearing fit was really nice on this motor - nice and just the right amount of looseness. Std socket head M2.5x8 mm screws are used at the backplate.
The booster channel in the middle flanked by booth transfer channels.
Double o-rings in the front box for sealing the carb.
The carb lock (6.9 mm in diameter) is sealed at booth ends with o-rings and is of a "double-squeeze" type.
The aluminium carb has a 15 mm throat diameter and an "thermo insolating" sleeve pressed on. As standard there is a 7 mm plastic venturi installed and a separate 8 mm venturi is also included.
The rear cover with its two funny loocking channel/grooves thaty match the transfer channels in the crankcase.



My VS1 had a rough time in the "rough" waters...
Airborne - not for the first time on race day.
Racing to the top buoy.
If it only could fly this good all the time... ;)
It's me holding Christer Burströms HTB290 before a q-heat start.
And off we (he) go... ;)
Even the trusted "all weather" TS2's where digging hard into the water.
Mattias Bandit tunnel was not too shabby... He managed to finish top-3.
It's one of my q-heats, I'm the dude with the white Odo shirt belly... LOL. Christer is holding my VS1.
I'm second from left racing to the top buoy. Do note, there is five boats in the picture. :)
There is a hard righthander on the top buoy. It looks like this was one of few heats that had decent conditions (wind & waves I mean - the "weather" was excellent all weekend).
Pontus TS2 with TT motor.
Christer the "tunnel god" deciding what boat to use...
Fredrik Lundahl driving & Niklas co-driving.
Lundahl's Bandit looks 2 be blind...
Kim was fast but had no luck.
Anders HTB290 in the rough.
Bosse was TQ with his VS1/K&B tunnel. I was second in qualifying (VS1/OS)!
Christer's rides.
Fredrik was very close to go through from the B-final.
Anders HTB again.
Even though we dont race modified tunnels in Sweden, Anders had bought a cool Lynx with a CMB RS engine on a K&B lower unit. It looked mean.
On the evening before the race it was PERFECT weather for racing tunnels... On race day it was another set of rules... At least we could see how fast Christer's VS1 was when it was no wind.
Christer's VS1 showing off.
André's 11 year son testing his new VS1 for the first time. Maybe we'lls ee him racing later this season.
Bengt Björkhage finished 3:rd in H7.5.
André Westberg was fast in one heat in H7.5 - the rest he DNF'ed in...
Micke "Sunken" Sundgren's Kep's 21 won!
Micke on the back stretch.
Kep's 21 rules... ;)
Anders Martinelle's Taipan 21 finished in runner-up position.