 Deck Height Question |
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| clarkcou |
 Nov 28 2020, 09:16 PM
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#1
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Member  Group: Members Posts: 115 Joined: 17-October 03 From: Peoria, Arizona Member No.: 1,257 Region Association: Southwest Region  |
Building a 1.7, 90 mm piston/cylinder. With no base gasket, deck height is .013in. Shouldn’t the head gasket/ shim be included in the deck height.
Barrel shim, not yet installed, is .21mm. Head gasket is .068. Seems to me that deck height would be.082 without barrel shim. I.e. .013 plus .068. Thoughts on this please? Randy |
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| Robarabian |
Nov 28 2020, 10:10 PM
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#2
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914 A Roo Group: Members Posts: 592 Joined: 11-February 19 From: Simi Valley, Kalifornia Member No.: 22,865 Region Association: Southern California 
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They sell a kit to help with it... a deck height measurement kit. No head gaskets / shims. Put the base shim and assemble the cylinder. Using the kit, it will bolt down under pressure (torque spec not necessary but likely used) and measure the deck height. You want .040 to .060.. somewhere in that range. Do the math and calculate the base shim you will need to meet the deck height. Make sure you take the CC of the heads into consideration for compression ratio calculations...
Have fun! QUOTE(clarkcou @ Nov 28 2020, 07:16 PM)  Building a 1.7, 90 mm piston/cylinder. With no base gasket, deck height is .013in. Shouldn’t the head gasket/ shim be included in the deck height. Barrel shim, not yet installed, is .21mm. Head gasket is .068. Seems to me that deck height would be.082 without barrel shim. I.e. .013 plus .068. Thoughts on this please? Randy |
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Posts in this topic
clarkcou Deck Height Question Nov 28 2020, 09:16 PM
Montreal914 I am sure others will chime in but per Porsche bul... Nov 28 2020, 09:48 PM
VaccaRabite
They sell a kit to help with it... a deck height ... Dec 1 2020, 11:59 AM |
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