TECH TIPS

COMP Cams
How to Break-In a Valvespring

It is important for new springs to take a heat set. Upon initial startup, limit rpm to 1,500 to 2,000 until the temperature has reached operating levels. Shut off the engine and allow the springs to cool to room temperature. This will usually eliminate early breakage and prolong spring life. After the spring has been broken in, it is common for it to lose a slight amount of pressure. However, it should then remain constant unless the engine is abused and the spring becomes overstressed. If this occurs the springs must either be replaced or shimmed to the correct pressure.

Fast
Choose a Closed-Loop Fuel Strategy

First, let's look at the difference between open and closed loop. In an open-loop strategy, the ECU looks at the oxygen sensor and determines the air/fuel ratio, then compares it to how far it is off the original tune. That is the extent of the process, however. When using a closed-loop strategy, the ECU looks at the actual air/fuel ratio, compares it to the target you are looking for, and corrects the amount of fuel to keep you on target. Closed loop will keep your engine running more consistent and happy.

Inglese
Always Recalibrate

If you make changes to your Inglese system, featuring a FAST EZ-EFI Self Tuning Fuel Injection System, it is important to recalibrate the TPS switch. This will make the system run more consistently. Also, when recalibrating this switch, be sure to follow the instructions to the letter, making sure not to complete the steps too quickly.