This module converts the digital signal from a flex fuel sensor into an analog signal that the R35 ECU can process. Simple plug and play installation makes this module a breeze to use. All of our products are proudly assembled in the USA.
Flex fuel composition sensor sold separately.
Signal output is ratiometric:
0.5V = 0% ethanol content
4.5V = 100% ethanol content
Less than 0.5V or higher than 4.5V indicate contaminated fuel or sensor/module malfunction
IMPORTANT EMISSIONS NOTICE:
In many states, it is unlawful to tamper with your vehicle's emissions equipment. Karel Tuning LLC products are designed and sold for sanctioned off-road/competition non-emissions controlled vehicles only and may never be used on a public road or highway. Using Karel Tuning LLC products for street/road use on public roads or highways is prohibited by law unless a specific regulatory exemption exists. It is the responsibility of the installer and/or user of this product to ensure compliance with all applicable local and federal laws and regulations. Please check with your local vehicle authority before purchasing, using or installing any Karel Tuning LLC product.
This harness connects to the left (driver's) side MAF sensor and allows the ECU to monitor a fuel pressure sensor. Reaches fuel pressure sensors connected to the back of the fuel rails. For other sensor locations please contact us.
Does not interfere with the boost sensor signal.
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.
We recommend these racing spark plugs on VR38s making more than 1600HP. They are heat range 9 and will work great on ethanol and methanol fuels. They are also very resistant to lead fouling found in some blends.
If you want the best combustion sealing solution on the market for your GTR, look no further. Our Extreme 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.
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 Extreme 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 and uses the awesome properties of copper to provide a secondary barrier to combustion leakage under extreme boost.
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 copper 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.
Our GTR R35 harness combines the fitment of a stock OEM harness with our race features we are able to wire directly to the Motec M150 and offer in one compact package all the OEM features plus:- Dual map sensors- Dual boost control- Dual inlet ait temperature sensors- Exhaust backpressure on both banks- Dual boost sensors- Flex fuel direct connection- Fuel pressure- Crankcase pressure- 2 Nitrous stages using all OEM fuses and relays- Nitrous pressure- Wheel speed easy inputs for vehicles with ABS delete- Motec dash ready- EGT ready- No throttle body extensions required- 12 Injectors ready- Additional rotary switch- Built-in current sensing for direct control of transfer solenoid and more!
This is a complete new harness however, due to the fact that some connectors and grommets are made solely for Nissan, we require a core harness. If a core cannot be provided, we will supply one at extra cost. While this is a plug and play item, expert installation is required since it will require changing Motec firmware wiring assignments to match the supplied base map as well as possible retuning due to additional sensors.
Harness is provided with a complete full color PDF diagram of all wiring connections and a base map with firmware of choice with all connections populated.
Does not include Knock sensor harness but connects directly to OEM
Does not include primary injector harness but connects directly to OEM
12-Injector harness sold separate. Engine harness has connector ready with secondary injectors wired behind intake manifold, not routing through firewall needed
Motec ECU sold separately
This is a custom-made item. Turn-around time is 2-3 weeks. We do not offer "mil-spec" finishing. All of our harnesses are finished to OEM specs using OEM routing techniques and the highest quality OEM covering materials. We guarantee all of our products are free of manufacturing defects and have tested them for years.
IMPORTANT EMISSIONS NOTICE:
In many states, it is unlawful to tamper with your vehicle's emissions equipment. Karel Tuning LLC products are designed and sold for sanctioned off-road/competition non-emissions controlled vehicles only and may never be used on a public road or highway. Using Karel Tuning LLC products for street/road use on public roads or highways is prohibited by law unless a specific regulatory exemption exists. It is the responsibility of the installer and/or user of this product to ensure compliance with all applicable local and federal laws and regulations. Please check with your local vehicle authority before purchasing, using or installing any Karel Tuning LLC product.
