I know many of you don't read the engine building board. Most of you do a lot of DIY projects but might think that engine internals are some kind of black magic. Let me just say that there is a wealth of information and if you are detail oriented and mechanically inclined you too can build your next 911 engine.
I rebuilt the top-end due to head stud failure. I am not going to recount the whole build here. The following link will show previous posts on the build.
http://forums.pelicanparts.com/showthread.php?t=435994
If you are just starting the engine specs are as follows.
1978 930/03 base engine
98mm Mahle PC set.
Measured 10:1 compression
DC 40-108 deg cams
steel head studs
Home-made twinplug distributor using Jaguar 12-plug cap and Burn-Bros. rotor. Thanks Aaron!
Twin-plug heads by G2 Racing. Thanks Craig!
Ceramic Thermal barrier coatings on heads and piston crowns
Dry-film lube on cams, rockers, rocker shafts, piston skirts, wrist-pins and every other moving part I could find.
TWM 3003 ITBs
MegaSquirt ECU (MSII-V2.2)
A few weeks ago I was able to get the motor back in the car. Last week I finished wiring up the motor only to find that my Crane optical trigger was not working. Late Thursday night I sorted it out. (Read: A new one was delivered by FedEx Ground).
So I connect the ECU, disable the motor, pull the top plugs and spin the motor with the starter. I was getting about 1.2-1.3bar of pressure off the starter. Enabled the engine by connecting the ECU and installing the plugs.
I was not expecting the motor to start right away. The motor took half-a-turn and fired to life. I was a little freaked out and shut it down quickly. I am not sure why. 10 seconds later I fired it up again. Once it was running I stabilized the map and it was loping along at 2100 rpm to break in the cam. It was running a too rich to explain the loping. After my 25 min cam break-in I made some more changes to the EFI map.
Here is the result:
now I need to reset the AFR at idle, balance the throttle shafts and lean out the acceleration enrichment.
I am so stoked right now. I don't know if the high is from the unburned fuel vapors or natural euphoria.
Not a drop of oil anywhere that I can find.