Do valve springs make a difference?
Do valve springs make a difference?
Properly functioning valve springs with the optimal rate can make a critical difference for engine performance and durability. Valve springs are among the most highly stressed components inside any high-revving race engine.
Do valve springs increase performance?
High Performance Valve Springs. Stiffer springs exert more force to keep the lifters in constant contact with their lobes and to overcome the increased momentum of the valves, rocker arms and pushrods at higher RPMs.
What heads came on the LY6?
What really sealed the deal on the LY6 was the use of LS3-style rectangular port heads. The 823 aluminum heads offered peak flow numbers of 317 cfm—a jump of over 65 cfm per runner compared to the 317 heads used on LQ4s and LQ9s.
What do racing valve springs do?
Valve Springs are one of the most important parts of an engine. They control the valvetrain. The spring makes sure the valve opens and closes smoothly. It also keeps the lifter in contact with the camshaft.
Do valve springs add horsepower?
This allows more of the spring load to control the valve. engine with a bigger cam and a better spring than the stock 454 H.O. and still managed to improve the peak power by 20 horsepower and increase the peak engine speed from 5,200 to 5,600 rpm. This really came as no surprise.
Do valve springs go bad from sitting?
Even sitting still, the cam holds several valves open all the time. This means that some springs are partially compressed while others are fully open, and eventually it’s this open-yet-sitting-still-stage that wears them out.
What will stronger valve springs do?
This allows more of the spring load to control the valve. So a higher seat load with a lighter upper mass of the spring combines to give the valvetrain more control.
How much HP can a LY6 block handle?
While many iron 6.0L engines had cathedral port heads, the LY6 and L96 came with high performance rectangle port heads. With upgraded internals, they can handle over 1,000 hp.
Does LQ4 have VVT?
Like the rest of the Gen 3 truck engines, the LQ4 used a 24x reluctor wheel and a three-bolt cam and didn’t have AFM/DOD/VVT.
How long do valve springs last?
Valve springs can last a long time, but they do wear. On higher mileage engines with 100,000 miles or more, it is not uncommon for the valve springs to lose tension. Springs that have lost more than 10% of their tension should be replaced. The life of these springs is also dependent on how your vehicle is driven.
What can happen if valve spring tension is too low?
Low Valve spring tension will cause valve float and reduce rpm, miss firing , popping in intake manifold or exhaust. If valve spring tensions are very low or broken valve stem Retainer keys can Disengage valve stem grove and drop out of guide damaging or Destroying engine.
Can valve springs be too stiff?
If the spring is too stiff, friction-related horsepower loss and accelerated valve train wear will result. This can include too high or too low spring pressure, or the springs can just be plain worn out.
What kind of springs are used on Ly6 cams?
To provide the necessary spring pressure and coil-bind clearance, the factory LY6 valve springs (identical to the LS3) were replaced by these 26918 springs from COMP Cams. We used this dual valve spring compressor to install the new 26918 springs. Once the springs were installed, the LY6 aluminum heads were ready for the .600+ lift 469 cam.
How much horsepower does a Ly6 lift cam have?
The spring upgrade was necessary to provide adequate spring pressure and coil-bind clearance for the .600+ lift cam. Swapping the springs was made simple with the use of a dual-spring compressor. Once installed and tuned with the FAST XFI management system, the newly cammed LY6 produced 544 hp at 6,600 rpm and 492 lb-ft of torque at 5,200 rpm.
What are the flow numbers on a Ly6 engine?
The LY6 cylinder heads are similar to the LS3 heads, and make good power. The stock heads can be CNC-ported for more airflow and milled up to .030 in. for more compression. Flow numbers can be as high as 373 cfm at .700 lift.
Which is the best cylinder head for a Ly6?
The LY6 cylinder heads are similar to the LS3 heads, and make good power. The stock heads can be CNC-ported for more airflow and milled up to .030 in. for more compression. A better option is aftermarket heads.
