Up north rider Posted March 20 Report Share Posted March 20 I’m wondering if I would gain any power from switching from my 24cc to 23 or 22cc domes on my 421 assassin. I don’t plan on running anything higher than pump gas. My cranking psi when I built the motor was around 120. Elevation I ride Is 600-1200 ft. Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted March 20 Report Share Posted March 20 @BANSHEE HP Quote Link to comment Share on other sites More sharing options...
Up north rider Posted March 30 Author Report Share Posted March 30 It is the low port version as well Quote Link to comment Share on other sites More sharing options...
SKEETER Posted March 31 Report Share Posted March 31 Just message bill aka bansheehp Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted April 1 Report Share Posted April 1 I’m wondering if I would gain any power from switching from my 24cc to 23 or 22cc domes on my 421 assassin. I don’t plan on running anything higher than pump gas. My cranking psi when I built the motor was around 120. Elevation I ride Is 600-1200 ft. You should always run the least octane your setup can take.Do a uccr test and report back. Lower than 12, you can put smaller domes.Envoyé de mon SM-S908W en utilisant Tapatalk Quote Link to comment Share on other sites More sharing options...
Up north rider Posted April 1 Author Report Share Posted April 1 So correct me if I’m wrong. Uccr means uncorrected compression ratio? Quote Link to comment Share on other sites More sharing options...
SKEETER Posted April 1 Report Share Posted April 1 Easy with the big words, claude is only an e n g I n e e r Quote Link to comment Share on other sites More sharing options...
Up north rider Posted April 1 Author Report Share Posted April 1 Lol Quote Link to comment Share on other sites More sharing options...
Up north rider Posted April 1 Author Report Share Posted April 1 (edited) I don’t even know what it means. smh Edited April 1 by Up north rider Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted April 1 Report Share Posted April 1 Easy with the big words, claude is only an e n g I n e e r I'm way more than a simple engineer. ;-)Envoyé de mon SM-S908W en utilisant Tapatalk Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted April 1 Report Share Posted April 1 I don’t even know what it means. smhYes UnCorrected Compression Ratio.Your static compression is kind of low, you can probably use smaller domes, but without uccr test, it's kind of hard to tell.Bill should know the numbers by heart since he's doing this days in days out.Envoyé de mon SM-S908W en utilisant Tapatalk Quote Link to comment Share on other sites More sharing options...
Up north rider Posted April 19 Author Report Share Posted April 19 After talking to driveline, I bought 23cc domes and it made such a huge difference! The cranking psi is now 140(cold). I know I should check it again warm just to make sure it’s not too high but I’m sure it’s pretty safe yet. I didn’t confirm the squish clearance yet either. .051-.055 is the green zone correct? Anyway I thought I’d say it’s running fantastic. I had no idea it would be such a drastic change. The cpi pipes that I have on there (I hate to admit it) kind of sucked for playing around and trail riding but now it seems to have way more mid torque. They almost feel like my old t5’s did but in addition to a lot more top end as well. I haven’t touched the jets yet but we’ll see. The thing rips! Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted April 20 Report Share Posted April 20 After talking to driveline, I bought 23cc domes and it made such a huge difference! The cranking psi is now 140(cold). I know I should check it again warm just to make sure it’s not too high but I’m sure it’s pretty safe yet. I didn’t confirm the squish clearance yet either. .051-.055 is the green zone correct? Anyway I thought I’d say it’s running fantastic. I had no idea it would be such a drastic change. The cpi pipes that I have on there (I hate to admit it) kind of sucked for playing around and trail riding but now it seems to have way more mid torque. They almost feel like my old t5’s did but in addition to a lot more top end as well. I haven’t touched the jets yet but we’ll see. The thing rips!Good!!!I had a DL 421, it was a great engine.Envoyé de mon SM-S908W en utilisant Tapatalk Quote Link to comment Share on other sites More sharing options...
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