How about a Tig welding aluminum discussion?

[astroracer]

I would like to talk about fillet welding aluminum. I am still very new to this so any discussion at all is appreciated.
I have a Lincoln Pro Tig 185. I am just starting to get "better" at welding aluminum. Not good, just "better"... I am getting better at reading the puddle and keeping my hands coordinated but I still need some seat time to get the stack of dimes consistantly.
Here are a couple of welds I did today on my radiator shroud for the van. I was using a 1/16 pure tungsten electrode, a gas lens with a #8 cup and had the max amperage set at 90 with the foot control running at about 75%. I set the pulse at 1 per second and had the frequency set to "AUTO".



i still have a long way to go and fillet welds still kick my ass...
Here are some I did on my trans cooler shroud.


These are not pretty but they are strong. I was running the same settings on the machine when I did these. I really had to work to keep the verticle plate from keyholing as I brought everything up to temp. What is the secret to getting the flat plate and verticle plate up to "puddle" temp without blowing through the "on edge" piece?



Mark