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Chamber Head Re Size


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#1 MASON1979

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Posted 13 June 2018 - 08:35 PM

Anyone got there full size diamgram of there chamber on there 12g940 head after following daivd vizard diagram on page 192 or any other improve people have done

#2 Turbo Phil

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Posted 13 June 2018 - 09:41 PM

http://i.imgur.com/kp2ZjPs.jpg

#3 grizzler73

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Posted 13 June 2018 - 10:27 PM

I am drawing it up in Cad at the moment, need to check first attempt against a head though, will keep you posted.

#4 MASON1979

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Posted 13 June 2018 - 11:27 PM

Im going to make on up on a old head aswell ill check before i start work on it but if you have your diagram aswell be great mate thankyou

#5 grizzler73

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Posted 14 June 2018 - 06:40 AM

TurboPhil
You appear to take more out of the area below the spark plug and put a larger radius on the top part between the valves than the Vizardised diagram, is that correct or just a trick of the light in the photo?
Cheers
Simon

#6 grizzler73

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Posted 16 June 2018 - 04:05 PM

Had a go at the chamber today, not fully polished yet but general shape is there. Am I in the general ball park?

http://imgur.com/gallery/0odTe9W

#7 Turbo Phil

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Posted 16 June 2018 - 08:47 PM

Looks somewhere near. Make up some blanks to protect the valve seats while you're working in there by taking the face off some old valves in the lathe.
The one I did in the picture above was for a turbo motor, so there was a little more taken out to give a larger volume.

Phil.


 



#8 MASON1979

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Posted 16 June 2018 - 08:59 PM

Had a go at the chamber today, not fully polished yet but general shape is there. Am I in the general ball park?

http://imgur.com/gallery/0odTe9W


You using a tungsten carbide cutter? Also you got a diagram full size of your porting? I was just going to follow daivd vizards and just a spare head gasket mark it and just draw roughtly to where it needs to be

#9 grizzler73

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Posted 16 June 2018 - 11:53 PM

Yep, tungsten carb followed by a stone to smooth it better, I made a template but am going to mod it a bit as the spark plug side is not quite right. I also scribed around a head gasket.I will polish finally with a flap wheel once I am happy with the shapes of all 4.




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