Fandt denne video på Mufflermikes hjemmeside
http://media.putfile.com/5500rpm
This is my first attempt at putting video on the computer, and it worked pretty good. The down side was this video doesnt show how fast the valves actually move at idle. The Movie Maker only caputures 30 frames a second so at idle, it looks like the valve opens only a few times. In the video below, I bring it up to 3000 rpm and then 5000, let it idle a bit, and then bring it right back up to 5500rpm and hold it for 10-12 seconds. Oil push has defintly been reduced. I do have one more test that may have biased the first and that was the lean of the car forward that may have pushed up the 3 exhaust and I hope to do that test tonight, to either verify if that changes any thing or not. Any ways, enjoy the video. its around 2 meg in size, so it might take a while to load for dial up. If you cant get the video to work at all, (my problem at work) I think there is a link on that page to actually download it too.
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Didn't think I would update that fast huh. Another week has passed. And I have held off with the welding machine until I get some real power at my house. I am in the works of putting in a new 200-amp service in the side of my garage. MORE POWER arg arg arg. So now, I have been thinking about a small oil leak I had at the last race. It was just enough to give the left head a light film of oil. (drivers side.) So, during one of my trips down to EMS, I had a little talk with them about the issue. Originally thinking I had a pinhole leak in my breather line or the fitting in the side of my cover, I brought up the subject of putting a drain in the bottom of the valve cover to drain the oil back to the case. Knowing that the windage of the crank will sling the oil up the push rod tubes and flood the cover. My thought was that maybe the oil was going up the breather tube where I think I may have a pin hole and wanted to be able to drain the cover sooner. Well, its definitely been done before. One of the ideas the guys at EMS had was that my spring bales may be getting week and the oil is sort of hydraulicing and lifting the whole cover and giving me that little leak. In the end I did find the real leak after some experimenting. The little bosses that you screw the cooling tin to the top of the head above the valve train had these studs in them, and during the last rebuild, the stud would always get in the way of torqing the head unless I used a shallow socket. So I took them out. Come to find out that at the bottom of the hole above #3, there is a small pinhole into the valve train area. Well I would never see it while it was sitting and running in the pits or the driveway, until I did this little experiment shown below. The guys at EMS let me use one of there old testing tools. Its actually cool. it is a valve cover with a window in it. I took it home to really see how much oil got slung into the left side.
you can clearly see there is no oil in it yet. Its weird to actually see the rockers in operation. Something you dont normally see.
I started the motor up and brought it up to around 2500 rpm and it is about a third full. At 3000 rpm it was half full.
On my way to 5000 rpm. This is why this is the easiest place to see if your motor is going away, pop this cover off and you will see any junk in the bottom of the cover that settled. its faster then pulling your filter apart. It all gets pushed over to this side.
At 5000 rpm. it is full. This when I saw my real leak on the top of the head. If you think about it, this area must hold a quart or a quart and a half of oil. No wonder you need a deep sump, otherwise you would have no oil to pick up. One of the ideas the guys at EMS gave me was to braze up the tips on the push rods so I dont send any extra oil up in the vavle cover. It definitly has enough with out it. And if you think about it, to do that would lighten up the push rod it self if there were no oil in it. Now I would say, this is not a good idea in a street car where you idle on a regular basis, but for my case where I really only race this, I am alwasy on RPM. But its not likely that I will do that yet.
