FPS higher with heavier bb's on AEG???

[Hectic]

Or just use the arnies link i provided and use the hole locstion to determine the volume (aproximately) of you cylender. Now that there are sooo many manjfacturers and off brand clones and such instead of sayin type1 and such just use no hole, 4/5 hole, 3/4, 1/2. like that is easyest i find

[Drake]

The ports on different brand/model cylinders aren't all in the same location nor in the same size/shape.

[MaciekA]

As with anything in airsoft there are enough variations and permutations to get exactly the result you want if your parts bin is big enough... And also enough to completely make terms like "type 1", "type 2", etc, either completely useless or no more than a very loose reference.

Here's a pic I took a few days ago:



And of course cylinder ports aren't the only thing that have a wide variation of shapes and sizes:

[Hectic]

Originally Posted by Drake

The ports on different brand/model cylinders aren't all in the same location nor in the same size/shape.

Thats why i said aproximately. However if you look at the shape/size of the ports all that really matters is where the front of the hole ends no mattet where the hole starts the compression cycle will start after the piston head passes the hole.
The vsr 10 mod i always mention the porting on the cylender is nothing more then a small 1/8th inch hole drilled in the cylender as opposed to extending the existing port the hole is just drilled xx mm from the front of the cylender to change the length of the compression cycle as long as the air has someplace to escape the comopression cycle wont start. So in the photo posted you can see that three of tje cylenders are all 3/4 ported and the one at the top is a lil off but still is technically a 3/4 tho probably not quite enough volume for 430mm but likely fine for 415 or 420.
And to bottom one obviously is a full cylender.
That of course isnt considering if they are bore up or anything hardt notice in the pics. Hey MaciekA is that silver one in the centre from an LCT?