CC DOMES 68MM PISTONS

[Jstrong]

hey guys, I’m currently putting together a 421 serval with 68mm pistons just wondering if anyone out there has the same setup, what cc domes are perfect for 93 octane that provides the most compression. I currently have 24 cc 9deg domes ready to install. Before I tried to put 21 cc domes in there, but I’m guessing they were too small since the engine did not want to turn over. The top of the pistons were getting stuck in the domes

[Tedder]

Pistons stuck in the domes? 

My 68 bore cubs with 115 rods use 573 series Blaster pistons as does my son's Serval 

[Jstrong]

Yes I also use blaster pistons. What domes are you running?

[Tedder]

I honestly can't tell you on the 4mil. They're custom cut alcohol domes for 1/4 mile asphalt by Tim @ Titan Racing and have no markings. My 10 mil domes were cut by Dave Noss. One pair is 24 and the other 22cc.  I'd recommend calling Dave (Noss Machine). He's a sponsor here and has been cutting domes forever.  He'll fix you up on exactly what you need. 

[Dalton]

24cc is what I run in my 421 serval pump gas sea level.

[ClaudeMachining]

hey guys, I’m currently putting together a 421 serval with 68mm pistons just wondering if anyone out there has the same setup, what cc domes are perfect for 93 octane that provides the most compression. I currently have 24 cc 9deg domes ready to install. Before I tried to put 21 cc domes in there, but I’m guessing they were too small since the engine did not want to turn over. The top of the pistons were getting stuck in the domes

Put the 24cc and do squish and uccr test and report back

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