Intake manifold modifications

[NoDOHC]

Update:

Got the new clutch (It looked pretty neat, I may get some pictures up later).

Installed Turbo drivetrain in the car.

Pedal effort is a little high, but the engagment is very smooth (as long as you don't try to drive gently).

The new tranny is excellent (has synchros in all gears!!)

After I finished with the drive train swap, I decided to take the car to the dyno again (more money...)

Unfortunately, I had to give up my easy turning transmission, my ultra-lightweight flywheel, etc so I figured that I would lose a couple wheel horsepower.

I was happy as a clam when I put down 203 WHp and 152 Wlb-ft of torque on my first run (Identical numbers to last time). I then decided to adjust the ignition timing some more.

Here is a summary of what I found
Ignition Advance at 8000 (Degrees BTDC),Peak Power,Peak torque
38,203,152
43,198,154 (I think the torque was inaccurate)
33,198,148

So now I decided to try fueling.
AFR (Average),Horsepower,Torque
12.5,203,152
12.8,210,155
13.0,216,158
13.3,216,160
13.8,200,145

Going back to 13.3:1 I started adjusting trailing split
Trailing split (degrees),Horsepower,Torque
15,216,158
10,216,158
5,216,159
0,216,160
-5,212,157 (I swapped leading and trailing plug wires for this test).

So peak power was 216.4 WHp at 7575 rpm and 160.2 Wlb-ft at 6100 rpm w/ 38 BTDC timing, 13.3:1 AFR,0 degree split.

(The glitch in the air fuel chart was corrected later, but after the AFR was steady, we quit including it on the trace.)