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What would you do to get the compression down?


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With Monday being a holiday (both for builders and mail) I'd have to agree with WCJ400's assessment.

If you don't have domes, that's your sole option....

 

87 octane is all you can get, huh?  I always thought Milwaukee was BFE, but to not have premium pump fuel??  I can't imagine small town living where they don't have premium for 50 miles....  WOW!!

 

Anyhow, I'm a fan of Redline.  Maybe give him a call and see if he can get a set of "off the shelf" domes out in today's mail and you'd have them no later than Wednesday.

 

 

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I put the .020 base in this morning. I'm having problems get the cylinders to seal. The outsides leak when under pressure. I pulled the .015 out and double siliconed the thicker one. Now it has to sit and cure

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If I have 22cc domes and I can only get 15cc's of fluid in the chamber then I would think that the dome volume is 7cc's. I using wiseco pro lites.

I talked to David Noss. He's going to cut me a pair of domes to my specs and overnight them. I'll have them on Wednesday. I first have to see if its going to pass a leakdown test with the .020 base gasket. I'll do another cranking compression too. If the base still leaks then I'm ordering a pair of oem base gaskets.

With the .020 base my squish is now at .055. Too big. David says .040 is what you want.

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With Monday being a holiday (both for builders and mail) I'd have to agree with WCJ400's assessment.

If you don't have domes, that's your sole option....

 

87 octane is all you can get, huh?  I always thought Milwaukee was BFE, but to not have premium pump fuel??  I can't imagine small town living where they don't have premium for 50 miles....  WOW!!

 

Anyhow, I'm a fan of Redline.  Maybe give him a call and see if he can get a set of "off the shelf" domes out in today's mail and you'd have them no later than Wednesday.

 

 

 

There is plenty of 93 octane in Milwaukee. The problem is the norther part of the state where we ride. We rode from Florence to Dunbar WI. They had on two pump gas station and it was only 87 octane. Neighboring town 20 miles away had 91 but I wouldn't of made it there.

Edited by turbowrenchhead
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Passed leak down test! Yay!. I now get 145psi cranking compression with the 22cc domes. I can get 15cc's of fluid into the chamber. According to the online calculator that puts me at 12.9:1. I don't put much faith in that calculation though.

My squish is too big, so I can still have the need for a set of custom domes that will give me optimal squish and compression.

I can't test drive it because my rear shock was rebuilt and on its way back home. Should be here Tuesday.

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Did you start it in between pouring oil in the cylinders and doing a compression test? If not, have you considered that your compression reading is higher than reality because of the extra oil on the rings?

 

Did the cranking compression first then cc fill second.

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What's too big in terms of squish? .050? You went from a .015 base to a .020 right

 

The base gasket must not be a true .020. I didn't measure it and I wish I would have. I went from a .045 squish to a .055 squish. So Its has to be .025 base.

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