RADIUM now carries COSWORTH Head Gaskets for the 2ZZ-GE - LotusTalk - The Lotus Cars Community
 
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post #1 of 6 (permalink) Old 09-07-2011, 05:36 PM Thread Starter
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RADIUM now carries COSWORTH Head Gaskets for the 2ZZ-GE

We are excited to announce that we are the first vendor to officially release these brand new products from COSWORTH.

Press Release:
Cosworth High Performance Head Gaskets are engineered to seal in power under the most demanding conditions. Constructed from stainless steel with a folded stopper layer, each application features superior sealing compared to conventional multi layer steel gaskets. Additionally, Cosworth High Performance Head Gaskets are manufactured from pre-coated die cut stainless steel resulting in uniform coating distribution and consistent shape.
Available in 3 different thicknesses to alter your compression ratio for your particular application.

Features:
-Individual die cut layers of stainless steel with superior consistency compared to lasercut gaskets
-Pre-coated stainless steel with a 0.25 micron layer of nitrile rubber ensures consistent distribution of coating with no high or low areas
-Manufacturing dimensional tolerance of +/- 0.001
-Die cut manufacturing process ensures smooth edges, unlike laser cut gaskets
-Cosworth gaskets feature a folded stopper layer for additional sealing pressure around each cylinder.
-Cylinder Bore = 83.5mm

Available Thicknesses:
0.38mm -Raises compression ratio by about 0.2
0.80mm -Decreases compression ratio by about 0.4
1.20mm -Decreases compression ratio by about 1.0
(For Comparison: Stock Toyota Gasket = 0.46mm)

Prices starting at $175.00

CLICK HERE - RADIUM Store Page

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post #2 of 6 (permalink) Old 09-09-2011, 08:48 PM
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Is this a safe way of lowering the compression? Does having a thicker head gasket have any drawbacks? I know this was popular with the Honda guys back in the day (esp when working on a tight budget).

05 graphite grey elige with zero mods.....sold
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post #3 of 6 (permalink) Old 09-10-2011, 06:49 AM
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MOAR! Oh sweet Jesus give me more cosi.
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post #4 of 6 (permalink) Old 10-02-2011, 10:12 AM Thread Starter
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Quote:
Is this a safe way of lowering the compression? Does having a thicker head gasket have any drawbacks?
When changing the thickness of a head gasket, the cam timing will be altered, but not significantly:
COSWORTH 0.38mm Gasket~0.2deg cam timing retard
COSWORTH 0.8mm Gasket~1.1deg cam timing advance
COSWORTH 1.2mm Gasket~2.4deg cam timing advance

This can always be dialed back to stock by degreeing the cams using a timing wheel.

Quote:
MOAR! Oh sweet Jesus give me more cosi
Stay tuned. We are working with COSWORTH on much more 2ZZ-GE related components.
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post #5 of 6 (permalink) Old 10-05-2011, 01:53 PM
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post #6 of 6 (permalink) Old 03-24-2012, 09:31 AM Thread Starter
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Cosworth Head Gasket Install Success



If you scroll down to 3/20/12 on the blog link below, we install a thicker Cosworth head gasket for a "street-driven" Radium Turbocharged Elise.

Radium Engineering - Blog - Radium Lotus Turbocharger Kit Diary

The 1.2mm gasket lowered the compression ratio a full point and safely allowed another ~50whp to be had on pump gas fuel.
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