Those can be calculated off the known advertised numbers; you have everything you need right on that cam card.
But like the guys are saying, until you get a piston installed, we are all pissing in the wind. From Post #1. I thought the short was already together.
Here's how it works;
You can't get the Ica until you know the Actual number of compression degrees.
You can't know the compression degrees until you know when the intake closes. So it's a catch-22.
So the first thing you need to do is decide where to put your Installed centerline. Normally, the cam grinder tells you a number like; Plus 4* or 106*. We all are assuming your Scr is close to correct, so with this small for a stroker, cam, we know that installing it there at plus 4/106, will make too much cranking compression.
From your numbers it is possible to calculate the overlap, and divide it by 2 and round to the nearest whole degree, and thus know where split overlap is. From that, in my earlier post My decision was to allocate 36 of the 71* of overlap, to the intake cycle, and the leftover 35* to the exhaust. That thus designates the starting point of the intake duration.
Since a 4 stroke cycle has 720 degrees to accomplish the suck-squeeze-bang-blow; we add our 36* to one half of that, and get 396 degrees in which to accomplish intake and compression.
We know the intake duration is 288 of that, so
396 less 288= 108 degrees of compression. Compression ends at TDC so the start point has to be 108 degrees earlier, or a half a revolution/180, less 108=
72 degrees, for the Ica.
There is your Ica at whatever advertised tappet-rise your grinder is calling out; which is usually .006 or .008, but occasionally is .001.
Since your roller ramps seem to be unusually long; 288 less 235=53*, Ima guessing his spec is .006; but the card does not say, and I'm just guessing, and it really doesn't matter.....
Because wherever the intake finally closes and stops leaking, it will be "bleeding Pressure " back up into the intake, being pushed along by the rising piston, at low to medium rpm, which in your case is a good thing because;
If your Scr really is 11.82,
yur gonna need to get rid of some of that, so that
you can give the engine a decent advance curve, so that
you can actually floor the beast.
BTW
using the same method, your power-extraction cycle comes to just 101degrees. You can expect this engine to suck gas big time around town no matter how hard you try make it better, and the fuel-economy on the hiway will be only mildly better, AND, an overdrive will be almost a complete waste of money;
because that is the nature of that cam operating at low rpm;
with hi-compression slamming just-inducted mixture back into the plenum, and
with only 101* (in my calculated case, worse at "plus 4") of extraction, AND
71* of overlap, during which the headers are tugging already mixed Fuel-Air charge out of the plenum and straight across the piston, and into the exhaust system, unburned.
But then, you didn't buy that cam for such a use, right? I mean the card says 2400 to 6300.................., so
I'm jus saying.
