Description
If you want the best combustion sealing solution on the market for your street GTR R35, look no further. Our Ultra Performance fire ring kits have been developed from the ground up to overcome the problems usually found on other systems and provide the greatest sealing capacity. This kit is suited for street engines that will make under 1800HP. The composite gasket material ensures a perfect seal against coolant and oil and we have tested it to well over 2000HP. However if your engine exceeds our recommended rating, you can also look at our Extreme Performance kit.
What makes our fire rings so special?
SURFACE AREA AND CLAMP SPREAD
Our rings are the widest on the GTR market. Made from the same material the Top Fuel teams use, we have maximized the available sealing area through trial and error in order to provide a ring that provides the maximum seating surface in order to spread the clamping load over a wider area and prevent cylinder head warpage during torque.
GASKET THICKNESS
After many years of testing, we have come up with the optimum gasket thickness that works best in all-out engines. On a GTR engine, the head gasket thickness determines the center of the variable cam gears, which need to be precisely aligned. Our fire ring and gasket combination is 0.010" taller than the OEM gasket, which allows machine shops to mill the cylinder heads to perfection without fear of displacing the VCT alignment.
CLAMP SHARING
In a fire ring sealing system, the gasket is usually used only to seal the oil and water passages and 100% of the sealing is left to the rings. In our Ultra Performance system, we have carefully measured fire ring crush height so that the copper gasket shares about 15% of the clamp force. This clamp sharing ensures a complete gasket seal against oil and coolant leakages.
COMPATIBLE WITH SLEEVES
Our fire rings have been carefully dimensioned to be compatible with both stock and sleeved blocks. On dry sleeves, our rings seat entirely over the steel. This provides a failsafe so that during clamping, all of the force is exerted onto the cylinder sleeve and not on the surrounding aluminum, pressing the sleeve into the block and preventing any "sleeve drops".
Kit includes:
- Two head gaskets
- 6 fire rings
- Instructions for machining groove
We recommend CNC machining of the fire ring grooves in the engine block due to the extremely tight tolerances of our gaskets. We can also provide CNC machining of the engine block as a service. While these can be installed on the cylinder head, we recommend engine block installation so that whenever the cylinder heads need to be serviced, they can be surfaced without worry of disturbing the seating groove. Seating the rings in the block also ensures correct gasket alignment and prevents the rings from dropping during installation.
