Since I don't have any personal experience with running an alky system PLEASE feel free to take this with a grain of salt....

Strictly based on what I've observed here on the board & how cars in the local Buick club perform on alky setups versus Homebrew blends (ET / chip timing / boost) I think that as in all things, it all boils down to the car's combo.

On stock / near stock cars with the original intercooler etc...(say a low 13 to mid 12 combo) the alky systems seem to run compareably to a car with the same combo running a 96~98 octane xylene blend.

On "moderate" cars with say a duttweiler neck & te-44 turbo (low 12 / high 11 combo) the alky guys & homebrew guys seem to be running neck & neck.

Where the alky seems to pull ahead a bit is on cars with more "serious" upgrades (mid 11's & faster.) Alky system cars seem to perform more in the range of what a car with the same combo could run on ~104 octane race gas.

Hope this makes sense! It's been a LONG couple of weeks!!!

Doug C.