Superlite_Don wrote:
So an update. He had the cylinder bored. I think 80.5mm. Then put it back together with shims under the barrel and did some compression testing. He has now ordered a copper base gasket .080" and thinks this will hit around 160 PSI so it will run on 93 octane. So we will know the end of the story when he gets it put together. He sent me some cool pictures of the porting that I thought you would like to see. Um, we had a bunch of ports in this thing... I think you will see why we turned it so many RPMs...Boost ports, wings, etc. Back in the day this was all top secret. I almost feel dirty posting them, lol. It did not have the low end the Nature's Recipe cars did (Bills Pipes motors), but it flew on high speed tracks. Won the SCORE Off Road World Championships, MTEG Rose Bowl, and MTEG Indianapolis Hoosierdome races with this (or its clone).
Thx for posting those pics. If we were all racing for the same championship here then I would say keep it secret, but many of us will never even meet each other in our life time. We don't even race anymore (a lot of us anyway). Plus very few even know what an oddy is, as they have never seen one. Our world is a small one now. Great to see some old history.
If ya would have cut anymore holes in that cylinder you could have used fly screen.
I got no confidence in that 93 octane decision. Amen.
Edit: Take a look at Randman and dipnadactyl comments above and you can see how critical it is.
dipnadactyl blew several engines in a row just like I did running straight pump fuel. Randman gets away with it by running so rich he fouls plugs and wants to buy shares in the plug company. Now you burn fuel like an F15 on afterburner. Also the
Engine has to be in perfect condition. Get it wrong and it's all over. Pump fuel detonates, that's a reality. The fuel companies get away with it because all modern engines have deto control in the Engine management system. These old oddys don't.