How Cometic Head Gaskets can cure high compression in an Opel CIH Motor or any Custom Engine Build

  • August 6, 2021 at 12:36 PM
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NOT just Opel motors run into problems with multiple or aggressive decking causing compression issues. Fortunately Cometic has a solution, for most any motor with MLS gaskets in multiple thickness. From 0.018" ( 0.5mm ) thick to 0.140" ( 3.5mm ).

Please note I was NOT sponsored but Cometic.. I am just a fan of their product.

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In the case of Opel CIH motors.. While they sell them, they seem to not list them on their website under Opel, but under GM / CIH.

GM CIH Gaskets
Cometic Gasket supplies hi-performance gaskets for a variety of motorsports markets: ATV, Drag Race, Domestic Automotive, Harley-Davidson速, MX/Dirt, Off-Road,…
www.cometic.com

https://www.cometic.com/products/C4512-030 ( 0.8 mm)
( Close to stock )

https://www.cometic.com/products/C4512-051 ( 1.3 mm )
( Best to compensate for standard decking)

https://www.cometic.com/products/C4512-080 (2.0 mm)
( Best to compensate for aggressive decking)

https://www.cometic.com/products/C4512-140 (3.5 mm)
( Best to compensate for excessive compression / detonation )

As for the Calculators I used :

Wallace Racing - Automotive Calculators

http://www.wallaceracing.com/cr_test2.php - Compression Ratio

http://www.wallaceracing.com/calc-crank-press.php - Cranking Pressure to Compression Ratio

http://www.wallaceracing.com/dynamic-cr.php - Dynamic Compression Ratio ( When running )

Visit us on Facebook : https://www.facebook.com/GoinManta/ or call 1-804-503-0249

For more info on availability of Rebuilt Getrag 240 5 speeds for Opel GTs, Mantas and others.

0:43 - Detonation
1:06 - Piston Wear
1:55 - I'm not an expert but play one on YouTube ;)
3:55 - 2.4L Block with custom pistons
5:30 - Calculating Compression Ratios
7:04 - Gaskets and their affect on ratios

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