check your venting.

What is the smallest cross section of your casting? Can you move the
ingate? Faster fill doesn't always make a better fill.

What's the height of your cope?

"Leon McAtee" wrote in message
om...
"Smelly Belly" wrote in message
...
check your gating system. Are you using a pressurized or
non-pressurized
gating system? What's your ratio for downsprue: runner : ingate?

Tricks to help can include:
* reduce pouring height
* put bigger well at bottom of downsprue
* go to non-pressurized system
* put traps at end of runners
* dog legs in runners/gates
* minimize turbulance and metal veloceties in gating system

You can get some good books/training courses at the following:
http://www.afsinc.org

Thanks for the link. I suspect the last parameter is the one giving
me the problems. My ingate is quite small due to the thiness of the
casting. Metal velocity at that point is probably high. I also was
trying to keep the hydrostatic pressure high to help fill. My first
attempt only filled partialy - but had no sand includions.