I realized I never started a general project post after I started a post on the engine rebuild forum a couple years ago,
HERE if anyone wants some background or details on the engine and some of my background in motorsports.
This has been a 3 year project. Not because it required that much shop time but because of the "Shoemaker's son always goes barefoot" syndrome.
I purchased an Arizona/Vegas area, running project and decent driver quality 1978 911SC Targa right at the beginning of Covid and enjoyed it immensely with the family until the first winter under my care where I discovered that it had quite a few broken head studs. These engines have my respect always, it ran like a top that first summer with almost no combustion chamber sealing.
And well being in the motorsports field professionally I didn't need much convincing to do a spicy engine rebuild and also use it as a test bench for products and general enlightenment.
It is now back on the road and has been for most of this spring and summer and has accumulated a little over a thousand miles. After two oil filter dissectings with clean results it finally made it on the dyno and I am pretty happy with the results considering it is a 3.0 and it has stock heads and valves, for now.
My future plans are to develop this engine a little further with intake and exhaust changes to find as much efficiency as possible and then develop my head porting program. I am fortunate as a shop owner to own two chassis dynos, flow bench and supporting tools.
I also have future plans to rebuild the chassis. I just need to finalize my realistic expectations so I can pick my chassis combination to suit, I have to remember that it is a Targa and I have to balance my wants with my family's comfort expectations to ice cream and coffee. The kids may, or may not have full harnesses in the rear jump seats...
It currently has stock torsion bars and it had fresh front end bushings when I bought it. I added mono ball upper strut mounts to allow more camber adjustability, Bilstein sport/hd combo shocks, turbo tie rods, bump steer spacers, 3.2 carrera sway bars, and a decent alignment. The rear trailing arm bushings are way due for replacement but it is not making metal on metal contact just yet.
I'll split this up in a few posts. But for now here are some photos.
These are the dyno charts, first one shows estimated crank hp and torque which I found Dyno Dynamics to have the math behind this feature to be pretty spot on.
Second chart shows wheel HP and torque. The important take is that a stock 78-79 3.0 CIS car makes approximately 147-155 wheel hp on my dyno for comparison sake.
