Alcohol stove question

[Firedog]

I was bored so I picked up a couple of 16oz coors light cans (the screw on top kind) to make another stove. I cut the top off, cut 3 small ports in the top of the neck, and inverted it into the bottom.  Then folded about 1/4" lip to the inside to finish out the top edge. Drilled 16 holes 1/16th" around the side about 3/4" down from the top. Making sure the holes were low enough that the inner liner was above them. I measured the clearance between the outer & inner liner to be 3/16".  I used 1 oz of ISO Heet for fuel for a test burn. Lit the fuel waited about 1 minute, fuel boiled bloom lit but burned white. put a pot on top, still burned white and smutted the pot black. I have made a few stoves before like the basic penny stove, (two can bottoms) with complete success. This one resembles squidbilly's bud light stove.  Any suggestions on the incomplete combustion issue.

[squidbilly]

Don't use the ISO Heet(red bottle), it's isopropyl alcohol. Iso burns white or yellow and soots your pot. Use the yellow bottle. It's 99.5 percent pure methanol.  Clean burn--pretty blue flame.

[Firedog]

I sent one of the guys here at work to get the heet. He brought back the red bottle. That is what the problem was. I never have used the red Heet before and thought what the heck. We had some 91% isopropyl  here and I tried it and it did a little better but not like the yellow bottle heet. I'm going to do another one and have a few questions.
1) does the inner wall need vent holes. I burned the stove with no vent holes thinking the pressure would be greater. It  did produce a longer flame length than after vent holes were added.
2) does the size of the weep holes matter in the bottom that lets the fuel inside. Can they be too large?

[Firedog]

It was the fuel. I went and got the yellow Heet. Works fine. Bloom in 1.5 min, 2 cup boil time 7 min., total burn time 13 mins on 1.5 oz fuel. not bad. See pics.

[squidbilly]

Lots of stove info

I've not seen those Coors Light bottles around here but I do have a few Miller light bottles just like them. I made a stove out of one similar to yours, but it wasn't as nice. Rolling the top over the inner part is a nice touch. I have not experimented with that stove so I can't really answer your questions for sure.  Since it seems like you need a windscreen most of the time, I made a combination screen/potholder/heat reflector to use with this stove. It  boils half a liter in 5 mins.

About the Heet:  I couldn't find it listed On this website,so I wrote the manufacturer, told them what I used it for and asked what was in it. Other than the methanol 99.5 percent, it contains 0.5 percent fatty acid type detergent to prevent fuel system corrosion.