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Rough Compression Ratio On SE103"

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Old Feb 29, 2012 | 05:22 PM
  #1  
2007 HD Ultra Classic's Avatar
2007 HD Ultra Classic
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Default Rough Compression Ratio On SE103"

Hey guys.

Im just looking for a rough compression ratio on my engine.

I have an 07 Ultra with a SE 103" with forged 10.5 pistons and currently stock chambered factory 07 96" TC heads. Im going to be using SE MLS head gaskets.

I could not find info on what CC the stock heads are. Is there a close idea where that setup will put me compression wise?

Thats the only part of the puzzle im working on to complete my build.

The bike will be running Woods TW 408-6 cams.


Thanks for your time!

Ryan
 
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Old Feb 29, 2012 | 07:29 PM
  #2  
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mtclassic
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Stock heads about 85-87cc bigboyz headporting has a great calculator for CR etc
 
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Old Mar 2, 2012 | 04:04 PM
  #3  
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2007 HD Ultra Classic
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They call the cylinder piston kit 10.5:1 in the SE catalog. The gasket that came out was thinner that the SE MLS ones. So im thinking were just going to call it 10.5'ish:1

Itll be close enough I suppose. Ill take some cranking compression numbers once its assembled to get a feel for where we are at.

Im going to check piston to valve clearance once the heads come back and make sure everything looks good, then I can finish assmbly and get this thing back in the bike.....I cant wait!
 
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