Answer: Griffin recommends using a premium cap with 14-18 psi for street use and 22-24 psi for racing.

Answer: If the coolant temperature and flow are well controlled it will not offer a significant improvement. Extreme high output engines may benefit from higher pressures.

Answer: Yes. You can use an engine oil cooler if your car does not currently have one. When an engine is run at high speed for more than a few minutes, such as racing, the engine oil cooler will keep the oil temperature down. This prevents the oil from breaking down and ensures lubrication meets design intention.

Answer: The 134A is EPA regulated and is what most car manufacturers are using today (the new refrigerant). The 134A condenser is designed to reject 6% more heat at the same conditions and should withstand slightly higher pressure as required by SAE J639.

Answer: Yes. See #2.

Answer: There should be 1/4" – 3/8" (no more than 1/2") between the A/C condenser and the radiator. If there is too much space the air will go around the condenser. The condenser cannot go on the backside of radiator. Temperature of the air leaving the radiator is too high for a condenser to reject the heat required for proper A/C operation.

Answer: Both work fine if properly sized and properly installed.

Answer: Griffin offers both internal coolant to oil heat exchangers and external air to oil heat exchangers.

Answer: An internal transcooler may raise the water temperature by an insignificant amount of approximately 1 – 2 degrees.

Answer: Some of the original transcooler fittings are not available anymore.

Answer: Transcooler fittings depend on the design.

Answer: Adapters for the Griffin transcooler can be purchased at NAPA, Advanced Auto, etc.

Answer: You would use a surge tank when a radiator is mounted lower than the intake manifold. Air will tend to collect in the highest part of the system and will need to be purged at the manifold.

Answer: You can use either a plastic overflow bottle or one with a screw on cap. It's a matter of personal preference.

Answer: A baffle should be put in the tank on a cross flow radiator if both hoses are on the same side. This assures that the engine coolant flows completely through the core. This baffle is always included with Griffin cross flow radiators. Down flow or double pass radiators do not require this baffle.

Answer: If the fitting is the same size as the inlet and outlet you can use an AN fitting instead of a slip-on hose fitting. If AN fitting is smaller, the flow will not be as good.

Answer: You can purchase hoses at any auto store. (Braided hoses – Laughlin Speed Shops, Hutcherson and Pagen Charlotte.

Answer: You can use any standard water pump with a Griffin radiator.

Answer: You can overdrive the water pump 20 – 30% for better cooling.

Answer: Griffin does not recommend running without a thermostat. Typically, engines operate optimally at 185 to 195 degrees F coolant temperature. The thermostat ensures this. Without the thermostat, the coolant will go below these temperatures causing higher wear due to differential thermal expansion.

Answer: You can use any good name brand thermostat with your Griffin radiator. A typical thermostat opens at about 189-190 degrees.

Answer: Griffin recommends a thermostat over a restrictor plate. The restrictor plate does not offer flow control allowing higher flows at higher temperatures and throttling flow at colder conditions.