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Title: Installing valve seats Post by: André_82 on January 08, 2010, 21:20:27 pm Hi Guys,
i need some help, i would like to install new / bigger valve seats in my 041 casting vw heads but unfortunately i don´t now the right oversize for the fit of the seat. What oversize is the best for a hot type 1 vw engine? ??? ??? ??? ??? Cheers Andre Title: Re: Installing valve seats Post by: besserwisser on January 09, 2010, 16:58:54 pm First of all you already have 39mm in a basicly standard head. Valveseats for bigger valves than 40 is a tight fit next to the sparkplug. The press fit I use is 0.15mm oversize on the seat. I use a bronze alloy called jm7 which expands as much as the alu in the head therefore never a lost seat. Unless you are intending to do some serious racing I think you can port the 041 head with the 39 intake to a good performance head. I get 100hp out of a low compression 1680 with 35.5intake valve.
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