OK, thanks for good answers. What is max ratio(piston area:"thin area") that is safe to use? I think that 6 sounds ok, but 7-> sounds risky because if the piston is too loose, it leaks so much that the piston wont open?

If think that Im gonna use spool valve, because Im afraid that the dead volume ...

As you can see the title, Im designing high mixture hybrid and one thing that is the "problem" is this:

What kind of piston area ratios you guys use? I know that the area backside of the piston must be much bigger than the area of frontside of the piston which seals the barrels(the little area that ...

OK Thanks, but there are only two possible choices that I could use, Triggered spark gap or Trigger transformer spark but the trigger transformer spike is way too weak for this use I have tested it earlier, it sou weak that it doesnt ignite the main spark.

Im going to find very small car or ...

No and like I said, I would need also with camera flash somekind of ignition coil and cars ignition coil is wayy too big.

So im wondering what is the smallest possible size yet powerful enough to ignite 30x mix? I know that I have to use max like 1mm spark gap and it must be much more powerful than like bbg ignitor.

Basic disposable cam+ingition coil doesnt work because this circuit have to be very small.

I dont ...

245Tommy: Any ideas of output velocity?

POLAND_SPUD: Are yours compressors made by Danfoss?

POLAND_SPUD: Were yours all compressor able to get to 40bar or more?

Crap...my fridge compressor cant go higher pressures than 20bar

Edit:Sorry, I didnt remember that double-posting isnt allowed

Haa...I finally got my fridge compressor Ill have to test it later today, my test target is 0.5liter plastic bottle

Hey! I quickly drew this scetch http://www.aijaa.com/v.php?i=4183888.jpg and I have little question from it.

Because that pump should work when you push the piston down, but how about then when you pull the piston back, how the "new air" gets into the pump chamber? Should I do the somekind of check ...

What do you think that if I make 30x mixture and Ill use that valve so does it handle it?

Thanks...I think that this is much easier because you just have to weld a big nut to your chamber and then just get a big bolt and weld your barrel to it

Just formed crack.

OK, here is the picture from cracked chamber: