taking flywheel bolts off and the engine turns easy 10:1comp

[Guest mescalinedreamz]

i was barely exerting any pressure and the engine was turning like butter.

 

Rebuilt with 700 miles, n42 head with flattops. 270,280 460 lift cam. Runs like a raped ape until the clutch started slipping, or what seemed to be that. I took my new centerforce 1 clutch off and the flywheel had all kinds of cracks in it, and my rear main seal had a pinky finger tips wirth of oil on it. Clutch disc looked great though, no oil on it.

 

I took my buddy for a drive and was really gettin on it, but i was running out of gas, i burned them in first,second and threw out the tail on third and then went and got gas and came home. I changed the fuel map in my haltech and took it for a drive, i couldnt get no rubber. Rpms would shot up and the engine would slowly follow. So im getting a new exedy stage 1 240mm with a 2+2 flywheel to see if this will help.

 

I would expect the engine not to move so easily with all spark plugs in. Any ideas?

[cheftrd]

With that size cam, your dynamic compression under hand cranking conditions is very low because a lot of the air gets pumped back out due to the valves being open long after the piston has reached BDC.

[Guest mescalinedreamz]

well i decided to take the valve cover off and try turning the engine with the camshaft bolt with spark plugs in, cant do it. Why was it so easy to turn when attempting to take the pressure plate bolts out?

[Guest 240zt]

you dont know your own stength

[johnc]

Its that very basic mechanical thing called: A Lever.

 

http://www.mcs.drexel.edu/~crorres/Archimedes/Lever/LeverIntro.html