Yes, you definitely can. Stacked blocks are legal and safe to use if done right.
Block stacking, however, may have an effect on the drive shaft, suspension, and other parts, which may lead to a decrease in performance, a poorer driving experience, and a lack of fuel efficiency.
If stacking spacers would do the job of achieving higher lifts without any drawbacks, there would be no need for the existence of lift kits.
On the other hand, stacking lift blocks or spacers can be an appealing option for a lot of you, as they are quite straightforward, inexpensive, and easy to install.
So, where do we draw the line? How would you know if stacking rear lift blocks in your vehicle is a good idea or not?
Read through to the end because I’m going to tell you all about lift blocks, how and why some people stack them, and the advantages and challenges presented by stacking them.
Lift Blocks: What Makes Them Important?
You might want to know how do lift blocks work. Well lift blocks are spacers you put under the body of an SUV or a truck to raise it from the frame.
They raise a vehicle’s height and allow more space under the wheel well so bigger tires can be installed.
They don’t raise the suspension, though, nor the height of the frame from the ground; in other words, the ground clearance remains the same. So, stacking lift blocks alone won’t make your vehicle any better at off-roading.
Lifting enthusiasts like them because they allow that extra height and do so without affecting the vehicle that much, if at all.
They are frequently used with other lifting components to achieve the desired effect of a taller, more drastic lift kit without breaking the bank for an actual one.
The key is to ensure that they are sitting securely on the frame and that the contact with the body is snug and well-aligned.
If you can ensure they won’t slip, you can even put two on top of each other for double the added height.
How to Stack Rear Lift Blocks
The question is not “can you stack lift blocks” anymore; it’s how to install them. If you’re considering stacking rear blocks, it’s crucial that they are installed correctly. Here’s the simple step-by-step process. are.
- Use a jack to raise and support the vehicle body. Make sure it’s stable and secure.
- Locate the original lift blocks, and remove the bolts that secure them to the frame.
- Place the new blocks on top of the original, and bolt them in place.
- Check the alignment. Make adjustments if necessary.
- Tighten all the bolts again.
- Lower the vehicle.
As you can see, stacking a new lift block on top of an old one is quite a straightforward process. But it doesn’t just end there.
Improper installation of new blocks can lead to dangerous consequences. That’s why you need to look out for these things when stacking rear blocks on your truck or SUV.
- It is crucial to ensure that each block is of equal size and weight in order to maintain stability.
- Make sure the blocks are installed evenly and flush with each other. Ensure that the stacked blocks are securely and tightly attached to each other.
- Tighten the bolts as the manufacturer suggests. Place all the nuts, bolts, and washers as intended.
- Check the alignment: After the blocks are installed, check the vehicle’s alignment to make sure it is still within specifications. If the blocks are not properly aligned, they can potentially slip during rough bumps, leading to drastic accidents.
- A test drive is important: Don’t put the vehicle away when you’re done stacking the rear blocks. Take it for a test drive to make sure everything is working properly. Check for any unusual noises, vibrations, or handling problems.
- Use blocks that are rated for your vehicle’s weight and use
Remember, before buying a lift block to stack on top of the older one, it is important to choose the right size and quality of blocks. The blocks must be made from durable materials.
Cheap, low-quality blocks may break or deform over time, leading to handling problems or even a dangerous failure.
Before stacking lift blocks, it is important to consider the safety implications.
So are lift blocks safe?
If the stack is too high, it can cause instability, handling problems, and even damage to the vehicle.
If the blocks are not installed correctly, there is a possibility that they might slip during driving, which is an extremely dangerous thing to happen.
To ensure the safety and compatibility of the setup, it is best to consult with a professional or the manufacturer of the lift blocks.
If all you want is to put slightly bigger tires on, lift blocks will do the job of creating more room in the wheel well. They are also easy to install and cost-effective.
You can stack them with other lift kits for more height, considering how much more an 8-inch lift kit costs than a 6-inch one. But before doing so, ask a professional if they will fit.
As the extra lift block increases the gap between the body and the frame, the center of mass is raised even higher. What this means is that there will be extra pressure on the axle as the suspension springs will have to work harder to control the vertical and horizontal movements.
This can affect axle movements and deform the springs over time, affecting the vehicle’s smoothness and efficiency.
Stacking blocks does not directly increase ground clearance as the frame sits at the same height as before. But installing bigger tires can increase ground clearance, which the rear blocks let you do.
This will improve the offroading experience a bit, but you should probably look for a good lift kit if off-roading capability is what you’re primarily looking for.
Do Stacked Lift Blocks Affect Fuel Economy?
After stacking lift blocks, the gap between the body and the frame increases, allowing more air to pass between them, which increases drag and reduces fuel efficiency.
This adds to the fact that the increased height of the vehicle drops fuel economy by allowing more air to pass underneath it.
What size rear block for 6 inch lift?
You need to stack at least four rear blocks together if you want 6 inches of height added to your vehicle.
But you won’t get any added ground clearance from stacking this many rear blocks, as they need to be inserted between the axle and the leaf spring of your vehicle.
This means that the suspension of your vehicle is not being altered. So you are only able to get a more raised vehicle where you can fit larger tires, as there will be enough spacer under the wheel wells.
Whatever you do, make sure you install the rear blocks properly. If any of them slip during your drive, you might end up in a serious accident.
How to lift rear of truck without blocks?
There are a few other ways to lift the rear end of your truck without stacking rear blocks on your vehicle.
You can try installing a coil spring rig, using arching leaves on your suspension, adding another helper leaf spring, adding longer bump stops, or installing coil spring spacers.
These are all budget-friendly options you can try to lift the rear side of your truck without using rear blocks.
But you can always opt for a full suspension lift kit that will have more benefits than disadvantages for your truck.