![]() Luckily I was near home, and put the hazard lights on and limped her to the parking garage.I got out while it was running to see if I could hear the problem closer. It stinks like off-road pipes and it's shaking so badly my chair feels like a massaging seat. I go to pull away from the light and boom, feels like I dropped a muffler.car is all of a sudden loud, sounds like a rusty 1984 GMC pick up, runs like crap, slow and jerky. NOTE: You can find engine specs and detailed engine upgrade advice for every LS and LS-based Vortec truck engine in one place: The Definitive Guide to LS Engine Specs and LS Engine Upgrades.So last night I was minding my own business, driving my car home, enjoying the last 2 days with her before she gets stores for the winter. This will optimize the fuel and ignition curves for the new camshaft, and turn off the VVT system in the computer.You will also need to tune the computer.The computer will no longer automatically adjust the valve timing.You will be locked-in to the valve timing.Click here to see VVT Delete Kits for 3-bolt cams.Click here to see VVT Delete Kits for 1-bolt cams.The type of VVT Delete Kit you need depends on the camshaft you are using. Some kits will also include additional parts, such as: These cams offer higher valve lift and longer duration for more performance.Ī VVT delete kit removes the VVT components and replaces them with standard parts. How Can I Delete the VVT on my LS Engine?Įliminating the VVT system is required when swapping to a non-VVT camshaft. In 2008-15, the actuator has 52-degree rotation. In 2007-08, the actuator has 62-degree rotation. The one one the right has no actuator, so it is from an engine without VVT. The one on the left has the camshaft phasing actuator, indicating that it is from an engine with VVT. They only have a three-pin connector for the camshaft sensor. They also have a five-pin connector for the VVT and camshaft sensor.Įngines without VVT will not have the actuator. (More on that in a second.) How You Can Tell Whether Your LS has VVTĮngines with VVT will have a camshaft phaser actuator on the timing cover. If you want high performance from a bigger cam, you will need to delete the VVT system. If you want to upgrade your camshaft and keep the VVT system, you will need a Camshaft Phaser Limiter. The high spring pressure required for performance cams can overpower the actuator.Your choices for valve lift and duration are limited.Piston-to-valve clearance can be a problem. ![]() ![]() VVT becomes an issue when swapping a cam: It can also retard the valve timing for more top-end power. It can advance valve timing for a smooth idle and low-end torque. That rotation is used to advance or retard the camshaft as needed. The actuator rotates one way or the other, depending on the oil flow. The valve sends oil into the phaser control chambers. The solenoid controls oil flow through a special control valve in the camshaft bolt. The computer sends a signal to a solenoid on the timing cover. It then uses that VVT data to determine the best valve timing for the current conditions. It also monitors valve timing through the camshaft position senso r. ( Summit Racing’s Paul Spurlock and Brian Nutter contributed to this article.) How Does VVT Work?
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