Rowdy and Mean 318 build
I didn't go with the hypers for exactly the reason why you are building a new motor...but I had my own problems. I went with Icon forged 1.81 CH. Decked to 0.00 the piston set .002 in the hole. My heads are Indys W/ .192-.162 valves and 62 cc chambers. Nothing done to them other than springs to support the xe268h and stock stamped rockers. Some like Aluminum heads...I don't so I didn't. CR is 9.8 now, was 9.5. at the dyno run and wasn't tuned right. With 3.23's and 2200 stall it runs 12.93 and 104 1/4 mile. Broke em loose and spun it up to 7000+ on damp pavement and galled a wrist pin. No damage other than the wrist pin. New rod and piston and it's a screamer again with a much better tune after seeking advice from those here. Since the 318 piston episode I have decided to build a 408...just waiting for the heads from Brian @ IMM and then the teener is coming out and the 408 is going in with 3.55's. Quench is your friend to help stave off some detonation. It did detonate a bit when I ran 89 ethanol free on the street...octane boost fixed that. now I run 92 e10 w/ no detonation... at the track I run 98. Here's my dyno chart at 9.5 cr and a poor tune.
Prolly somewhere between 330 and 350 hp to the crank. It's fun like AJ says but I want more...=408. The 408's gettin Mahle forged slugs this time.
I didn't go with the hypers for exactly the reason why you are building a new motor...but I had my own problems. I went with Icon forged 1.81 CH. Decked to 0.00 the piston set .002 in the hole. My heads are Indys W/ .192-.162 valves and 62 cc chambers. Nothing done to them other than springs to support the xe268h and stock stamped rockers. Some like Aluminum heads...I don't so I didn't. CR is 9.8 now, was 9.5. at the dyno run and wasn't tuned right. With 3.23's and 2200 stall it runs 12.93 and 104 1/4 mile. Broke em loose and spun it up to 7000+ on damp pavement and galled a wrist pin. No damage other than the wrist pin. New rod and piston and it's a screamer again with a much better tune after seeking advice from those here. Since the 318 piston episode I have decided to build a 408...just waiting for the heads from Brian @ IMM and then the teener is coming out and the 408 is going in with 3.55's. Quench is your friend to help stave off some detonation. It did detonate a bit when I ran 89 ethanol free on the street...octane boost fixed that. now I run 92 e10 w/ no detonation... at the track I run 98. Here's my dyno chart at 9.5 cr and a poor tune.
Prolly somewhere between 330 and 350 hp to the crank. It's fun like AJ says but I want more...=408. The 408's gettin Mahle forged slugs this time.