Tomei Valve Guide Set RB26DETT TA309A-NS05A

The Tomei Valve Guide Set for the RB26DETT is engineered with precision to handle the extreme demands of high-performance engines. Made from Phosphor Bronze (Cn-Sn-P alloy), these valve guides offer exceptional tensile strength and superior heat transfer, making them ideal for engines producing high power at high RPMs. As modern race engines face more extreme heat conditions, the importance of durable, low-friction components cannot be overstated. Tomei's valve guides are designed to reduce stress on the valve train assembly, preventing issues like seizures or cracking under heavy loads.

By maintaining optimal clearances and reducing friction, these guides contribute to the overall reliability and longevity of the engine. However, due to the extreme conditions in which they are used, regular maintenance is essential to ensure continued performance. Tomei Valve Guides are designed to withstand the lateral pressure caused by high-lift camshafts and aggressive valve movements, though excessive wear can still occur under certain conditions, such as carbon buildup or improper seat cuts.

Terra Firma Automotive proudly offers these high-quality valve guides to ensure your RB26DETT engine performs reliably under the most demanding conditions. These guides are the ideal choice for racers and performance enthusiasts seeking durability and precision.

• The rocker arm type assemblies will apply more lateral pressure, which will increase the wear rate. If the stem wall of the valve is rough, it will also contribute to the increased wear rate.

• Using high lift, aggressive camshafts will also increase the wear rate.

• Excessive buildup of carbon will also hinder performance and increase wear rate. When there's a small opening at the end, it will increase the carbon buildup rate as a funnel effect.

• The results from Valve Spring surging will cause the Valve to move on an angle. This will cause both ends to open up and create deformation. Then carbon can enter the valve guides more which will increase the wear rate.

• A defective seat cut. When the seat cut's centerline across the main 45 degree face is offline from the valve stems centerline by more than 0.01mm, this can cause increased abnormal wear rate.

• If the clearance is not within the correct 0.03-0.04mm range. The Valve will rub against the guides inner wall, this degree angle in relation to the seat cut will cause it to shift by 0.01mm more than the clearance values. The guide will take the lateral pressure point and open up the opening. The buildup of carbon will increase in the newly formed gaps.

• A worn out used Valve. It's possible to cut down by using the part that has not worn out the stem when changing to a high lift cams. The guides can wear out when the inappropriate clearances are made. (About 0.01mm out of clearance).

• The Valve design is defective. The difference from the dilatability and the guide being worn out abnormally is when the valve that is made with different alloys, will contribute with a faster deterioration.