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> >I want to convert to dual port and add a little power at the same time. I have >noticed that big valve heads are made in either 39mm x 32mm or 40mm x >35.5. > >Which would let the engine breathe more and add more power?? >I have seen the 40 x 35.5 heads on engines around 2000cc. So would the 40 x >35.5 >"hurt" my 1600cc more than it would help?? Would it breathe too well?? Or >would the >39mm x 32mm be the perfect choice for reliability and power?? > >Any help is appreciated > >thanx >chris You need to take the carburettor & cam into account when deciding on valve sizes. athomik ============================================= Remember kids, don't try this in your Beetle! ============================================= ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/