bigboots said:
When the sugar turns to alcohol it may change the flavour SLIGHTLY, but it won't change the body to any significant degree!
Alcohol is a recognised part of the flavour profile of beer (and cider and wine and everything else). If you increase the amount of "clean" sugars (dextrose, sucrose, fructose etc) then you increase the amount of alcohol without a corresponding increase in the other flavour components of the beer. i.e. you get a real-terms reduction in them as the alcoholic component is increased, basically you double the alcohol you get a real-terms reduction of 50% of any single other component in proportion.
Using malt extracts (LME or DME) will help prevent this as they aren't clean sugars, they have dextrins and other unfermentable polysaccharides which will contribute to the body and malty flavours in the beer. "Dirty" sugars like mollasses can add a bit of body and flavour along with the alcohol too.
Trouble is though that this is only half the story, we haven't considered hops. The amount of bittering in kit brewing is fixed unless you add hop teas and/or dry hops. So you can increase the alcohol all you like, you can get a body/mouthfeel/malt flavour balance by using malt extracts but you can't add bittering or hop flavour/aroma. In fact using malt will make things worse! You increase alcohol + body + maltiness + mouthfeel but don't increase bitterness or hop flavour or aroma.
These are the basic principles which drive extreme beer brewers to go to great lengths and use exotic grain bills and vast amounts of hops to produce beer in the 9%+ range which don't taste like the all-alcohol, cloying, mess of a beer that is Tennents Super...
bigboots said:
P.S. GA... Have you tasted any of the beers I'm talking about? If not ( and I know not! ) how the f*** can you make a comment like that?
The knowledge of basic principles of flavour profiling is probably more than enough and a pedigree in brewing exceptionally flavoursome high ABV beers would help.
I'd also like to point out that this forum is one of the friendliest places on the 'net. Mind your language in future please. Healthy debate (no matter whether or not it suits your opinion) and learning is what we're about and we don't tolerate aggression in any way.