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107 build with hemisphereical heads. Continued...

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Old 12-29-2018, 05:31 PM
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Default 107 build with hemisphereical heads. Continued...

Okay so i have the limits of my vaulve springs now on those SE heads (5.85 max) so Im thinking if I use the 10.5 to 1 with a 2.0 dome I get a comp. Of 10.11 to 1 static with a corrected comp of 9.19 to 1 and cranking comp of 190 @ sea level with the woods 888 cam.
This on a 107 big bore kit from a 07 nighttrain 96.
Anyone see a mistake Im making here?
Thanks in advance for the input.
should work with gas no problem....right
 
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Old 12-30-2018, 10:26 AM
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Are you getting pistons to match the heads?
 
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Old 12-30-2018, 10:40 AM
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Wrong cam at 10.1:1. It’s a mid range/upper end cam to start with. Ran the 888 in a 107 at 10.6 and was stout. It’ll be pretty soft until 3500 rpm. Match cam to the compression, target 200ccp on a softtail, they need it.
 
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Old 12-30-2018, 12:02 PM
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Default Ntraindave

If U deck the heads so the chamber goes from 92cc to 87cc 1.5 on piston dome I get 10.55 to 1 static 9.59 to 1 corrected and 200.9 ccp with the 888. Or would you change to a different cam?
 
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Old 12-30-2018, 04:51 PM
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888’s are nice cams but decking that much you’d need to check clearances. Better to go more piston dome or cam change
 
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Old 10-07-2020, 01:18 AM
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Wrong place
 
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