turbowrenchhead

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.

Did the cranking compression first then cc fill second.

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.

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.

Talk to cam and redline racing or jay at illinois power sports for a pair of ported cylinders.

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.

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

Yes I know

I would recommend getting it dynoed to get the jetting right. Lots of guys burn their engines up because of improper jetting.

I emailed him last night and left a message this morning. I will need them by Thursday next week or I'll have to go with bigger base gaskets.

I'm lucky if they have 91 octane in the rural areas I go riding in. We go on 100 mile rides. Usually we head to a town 40~50 miles away, fill up and head back

Ss

I just found this out tonight. Whom might I call?

What I need is custom cut 24cc domes

Don't have time to cut domes for it. Big trip of the year is 7 days.

I have a stock stroke and 66mm pro lite pistons with stock ported heads. Noss head w/ 22cc domes. I recently changed out the cylinders and pistons. The cylinders were decked .004 because of a nick in the head. I'm using a .015 base gasket and my squish is at .045 with that. I was told between .040 & .050 is optimal. I did a cc fluid check and I get 15cc's in the chamber with 22cc domes. By method of a online calculator(http://www.cbperformance.com/v/enginecalc.html) I get a cranking compression of 160psi. That puts me at 14.5:1 compression. Way to high for pump gas. 23cc domes would lower my cranking and my uccr compression. The thicker the base gasket I use will increase my squish. Then I'm out of the optimal range. If I run the .031 base it will drop compression to 12.5:1 but increase my squish to.061. Last year I didn't know my uccr but my cranking compression was 150psi with 21cc domes, stock base gasket (.026) and undecked heads. The bike ran great last year and even ran a tank of 87 octane in it with no problems. The pistons didn't show any signs of detention either.

I was playing around with the calculator. The base gasket thickness makes a big impact on uccr. I have a .020 base and a .031 handy. OEM measures out at .026 but I don't have any of those.

Looks like they don't make 23's or 24's. Hmmm.... now what

I had a set of 22cc domes so I put those in and got 15cc of fluid into the cylinder. I did a cracking compression and got 160psi. This reading is spot on with the changes that I made. I had a 150psi cranking compression last year and the bike ran great. So I'm ordering 23 and 24cc domes. Stands to reason that I'll be able to get 16cc's of fluid in the chamber. This brings me to 12.3:1. with 24 domes I'll be at 11.6

Got the motor back in tonight. I put 22cc domes in it because my uccr came to 14:1 with 21cc domes. I got 160psi cranking compression with kick start. I need 23cc domes

I'm still boggled how I could of run a high 13's:1 compression last year without any problems. I even ran a tank of 87 octane in it because there was no other octane options. It still ran good an pulled hard.

I had it decked .004. Nothing drastic enough to change the combustion chamber size significantly.

Uncut Pro design domes, nothing special.

Now I know the difference. According to that article anything over uccr 11.5:1 is the most you can run on 93 octane. According to that article my uccr was to high last year. But yet it ran great and there was no piston damage from detention.

I've never even heard of uccr until today. I found a long article on the web. I'll have to read it tonight when I have time.