Clearance Questions and Decking...

[Steven]

After the steady stream of good decking information, I decided to deck my cylinder to get at least an 11:1 compression ratio with my Wiseco big bore kit.

Do you guys know if I will have valve-to-piston clearance issues with the White Brothers Track cam I have installed in the bike now?

Thanks, Steve.

[MIKE400EX]

I've got the Wiseco 440, decked, with the same cam (450/451-GTT, WB Race) and it has plenty of piston to valve clearance. The pocket diameter is larger than stock so I wouldn't think there would be any issues with OS valves either. You might want to use some heavier valve springs if you plan on taking advantage of that rev box alot.

[Steven]

Thank you Mike. I've noticed you've been quite a contributor to the good decking information on this board-thank you.

Mike, how much metal can I safely remove from the cylinder?

I have not measured yet but everybody says the piston is about .040 in the hole with this kit.

If I remove .030 of metal, use a .010 base gasket and a .025 head gasket I will be about 11:1 correct?

Is it not a good idea to remove .035 or .040 metal and use the same gaskets (.10/.025) to achielve a little higher compression ratio? Will THIS cause clearance issues or other problems and what compression ratio will it yield?

Finally Mike, what can I expect a machine shop to want $$ wise for milling my cylinder?

Thanks again, Steve.

[Steven]

up

[Derek]

Steven..........dont keep making new threads, just add to the same one.:)

b4 you can get into the "nitty gritty" you need to install the piston and base gasket and get some measurements, then go back and re-read the original thread to answer or create most of your NEW questions and we will go from there.

I had found that there are too many variables for anyone to just throw out numbers. Some of the original info was spot on and a little out there for my set up so you really need to get the measurements first.

[Ryan]

Steven. I would start using race gas. After 11:1 you should be using race gas, or higher octane

[Steven]

I do. I have been running Cam2 race gas because I thought my c/r was 11:1.

Now I need to get it there.

Boy that motor must have been running sweet :).:rolleyes:

I had originally tried 112 octane with my recent rebuild (true 12.5:1) and it was super fat (rich) and am now working with diff ratios of 112 and 93 to see where it likes to be at. So far at 50-50 and no signs of detonation etc so gonna thin it out a little next tank.

So I can only imagine how bad it was running race fuel with around 9:1

[Steven]

It ran well with the cam2 race gas and 9.5:1 compression.

Cam2 is only 100 octane.