After the porous head that I had on my head, I bought a coscast head.
Also I had rebuild some parts.
Now the specs of my engine are the above:
K&N panel filter
Coscast head with headwork (porting&polishing) on Superflow center.
Compration Ratio 10.99:1
Pitstons have now deeper pockets and new rings.
New pillow blocks on con rods
ARP Rod Bolts
Adjustable Verniers for best valve timing.
SBD Type A exhaust manifold
Americat metalic cat
Custom handmade exhaust with 2 stainles steel boxes (54mm diameter).
Quaife ATB differential on F20 Gearbox.
I am very happy with the performance of my car. It is have very torque and you feel a continious pull when you accelarate even with 3rd gear. When the c20xe engines working good, they are brilliant!
Yesterday I won a race against a honda civic vti '92 that have ram air system and a full exhaust system. He was on front of me only in two first gears. When I changed on third I was won distance very fast, and at 75 mph we are in the same. At 85 mph (before I change on 4rth gear I was one car in front of him. At 107 mph with 4rth gear I was 2,5 cars in front of him!
Also we were three people on my car and he had only two. He couldn't believe how I won the race!
I will go very soon in the dyno to see the performance. I am expecting about 160 bhp to be happy, but with very good torque band.
The next step for me is to have a lighter flywheel, I have the pot type (9,5 kg, very much!) and in the future I will go for a aftermarket inlet manifold (like lexmaul or regal), camshafts from enem or schrick and for a custop chip that it will be setup on the dyno.