I have added a chart to help in selecting pistons based upon the chamber size. Hope this is helpful.

http://www.tmeyerinc.com/pistoncompare.html

 

I am sincerely impressed with your selection. What would be real cool is if someone charted compression drain on cams- so if you could have an idea as to what cam to select for 87 pump etc. Get into some dynamic compression etc.

 

You could do a series of charts with different Intake Valve Closing angles (53.5, 58.5, 63, 66, and 72 degrees) and give the Dynamic CR for each set of piston/chamber combinations. Then you could also give the Octane requirement for each cell, color coding the cells green, yellow, and red for 87 Octane, 89 Octane, and 93 Octane.

However there are other variables, like fast burn chambers, and aluminum heads, that will change the Octane requirement. The danger in publishing these charts is that someone will interpret them as absolutely accurate, when they can only be used as guidelines, because of the number of undefined variables involved.

Even if each set were dyno tested, you couldn't say with certainty that someone wouldn't have detonation in another build, if they built it close to the limit.

 

I have a software by "Performance trends" The comp. ratio software, and it figure out the DC also. 25-30 dollars, pretty nice program.

 

wow thats awesome tmi, ive been wondering what my compression was wiht the cam for a while

 

Here is a link to the DC program that I use. It is also good for calculating static CR.

http://cochise.uia.net/pkelley2/DynamicCR.html

There is an Octane vs DC chart on Hotrodders Bulletin board. I'll post that link, if I can find it.

 

well i can say for me my compression ended up a tad higher then i planned as it pings on premium lol. havent figured it out on the calc yet but if i check the compression by a gage i get 250

 

It is a Popular Hotrodding article. Here is the link. This is a great article.

http://www.popularhotrodding.com%2Ft...e%2Findex.html

 

hmm cant get that link to work says server not found

 

Try this link!

http://www.popularhotrodding.com/tec...eze/index.html

 

very interesting rest

 

Here is my version of the chart. This is for a Comp Cams 255DEH cam.

www.edyno.com/Octane_Chart1.htm