As an update, on the variable displacement. it didn't work as well as hoped.. I gained about 1.3 mpg.. not enough to be worth the risk to the engine, and the added trouble.
However, I have better news!!!! I just finished swapping back to d series with a CRX HF trans, And I was paid to do it!!
My buddy has a 1991 civic dx with a d15b1. Me and him worked out a trade to where we trade ECU's, wiring harnesses, motor mounts, axles, shift linkages , and he pays for everything, and buys me the crx hf trans. the reason it was worthwhile to him is because he wanted by b18b1.
here are some pics!
The hf trans
My motor
My engine bay
Lowering it in
Hell... *cough* wiring
His engine
We took the valve cover off the b18 and look how clean this thing is!!! this is after I have had it for + 15k miles and it needed an oil change!
here is my prototype kambak... the angle is to steep, I made it with some spare fiberglass. i wanted to test it with glass before I use my Kevlar.