What RPM big cam idle?
What RPM big cam idle?
It’s not easy to get a big cam to idle smoothly at 650 RPM (but it may be possible), so you want to go for something easy first. For example, if you have a cam that’s between stock size and 224 degrees intake duration, try an initial target idle speed of 800 RPM.
What should idle speed be for LS big cam?
The stock tables in the OE calibration are mapped for a cam that will produce lots of vacuum at idle speeds of 550-700 RPM. Lots of intake manifold vacuum at idle allows for a greater degree of control over torque output as there’s a lot you can do to control the pressure each cylinder produces during the power stroke.
How to idle a LS7 corvette Cam properly?
LS7 Corvette CAM CONTINUE TO PAGE 2 STEP 1. If you have the air/fuel ratio set properly and your engine can idle somewhat decently, even if it’s by holding the throttle pedal down off closed-throttle to keep the engine from stalling, you can begin by setting a ball-park ignition advance value.
What does it mean when your engine idle does not increase?
Use the command in the scan tool to increase the engine’s idle. If the engine idle does not increase, it means there is an issue at the idle control motor of its circuit preventing the signal from changing the idle. You can purchase a bidirectional scan tool at your local auto parts store.
What’s the best idle speed for a small engine?
If the cam is between 224-236 degrees duration (again, on the intake side) try a target of 900 RPM and for cams bigger than those listed above, set your target engine idle speed to 975 RPM. These will be a good, easy starting point depending on your engine setup.
The stock tables in the OE calibration are mapped for a cam that will produce lots of vacuum at idle speeds of 550-700 RPM. Lots of intake manifold vacuum at idle allows for a greater degree of control over torque output as there’s a lot you can do to control the pressure each cylinder produces during the power stroke.
LS7 Corvette CAM CONTINUE TO PAGE 2 STEP 1. If you have the air/fuel ratio set properly and your engine can idle somewhat decently, even if it’s by holding the throttle pedal down off closed-throttle to keep the engine from stalling, you can begin by setting a ball-park ignition advance value.
Use the command in the scan tool to increase the engine’s idle. If the engine idle does not increase, it means there is an issue at the idle control motor of its circuit preventing the signal from changing the idle. You can purchase a bidirectional scan tool at your local auto parts store.
How can I tell if my idle control valve is working?
To check if an idle control valve is working properly, start by turning on your engine and letting it run for a minute or 2. Then, when it’s at an idling speed, take note of the RPMs in your car. Next, turn the engine off and disconnect the idle control motor under your hood.
