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<x-charset iso-8859-1>>I do disagree with this, I have 7 to 1 on my 1679 and the fuel economy is just fine, around 27 in town on an IRS early Notch. The reason there difficult to tune, at least with stock carbs is the fact that there is little you can do with carbs to "tune" them. You can change jets, but they your making step changes in eather direction and you dont get any fine tuning ability... nor can you make the chokes track properly during warmup. Timing is very important as Brian suggested to me along time ago and this is easy to change but with Stock FI (and a good knowlege of how it works) you can change a great deal and fine tune many different operating conditions such as overall mixture, warmup mixture curve, idle mixture and high idle speed and duration and all with ease. You do however need to keep the cam reasonable with Stock FI. Keith if you run super low compression(like gene berg would > suggest to you) the engine is very difficult to tune > and usually runs very rich. > ------------------------------------------------------------------- Too much? Digest! mailto:type3-d-request@vwtype3.org Subj=subscribe </x-charset>