QPT Frequently Asked Questions
Where did the QPT concept come from?
DED LLC racing has been involved in endurance testing of kart engines for almost 20 years. We have been responsible to make sure that engines last over multiple racing seasons in a very limited time frame. In this testing we had an exaggerated frustration of failed parts to deal with because of the extreme conditions. But, we also realized that some of the parts and processes could really use some improvements. So we set out to make a better mouse trap. The QPT not only looked at fixing the fact that chain tension is a pain to set but also failure points of many motor mounts. Stripped threads, bad alignment, movement side to side when not wanted, cracks, twisting the block, cheap hardware/frame clamps, thick frame clamps (curb catchers). We took all of these issue, stood back and worked to fix them with one quality component.
What sets the QPT apart making it a great value for the racer?
The QPT is not just another extruded motor mount. It was designed from the ground up to be a better more functional motor mount than those on the market. The slide system with single turn adjusting is the revolutionary part. But the actual construction of it was designed to be quality from the bottom up. Completely CNC machined utilizing different materials, for instants the frame clamps are made from 4140 chromoly steel so they can be made thinner, the mount uprights are made from a different material than the plates so that the threads for the clamps hold harder and longer. All the threads are rolled into the material rather than cut to create a superior grain flow. Our goal from early on was not to maximize our profit on a cut piece of aluminum, but rather maximize the karting experience by creating something of quality putting the racers needs at the front.
What is QPT?
We have all been there, in a hurry, trying to get the chain tension right, but it never seems to fall just right. Every time we tighten the clamps it shifts; first too tight, then too loose. The QPT is driven from the top, with one screw from the back, that is used to move the motor front to back. There is no lock down, you just turn the screw. It has infinitely small movements meaning you can hit your perfect chain tension in seconds. This is the primary goal of the QPT, to make sure that you have the perfect tension for max power transfer all the time.
Does the QPT help with gear changing?
In 4 cycle racing every tooth counts, meaning, being off just one tooth can affect our race outcome. Because of this we find ourselves always changing gears throughout the day. This means we are loosening our frame clamps sliding the motor back and then resetting our chain tension constantly. This not only leaves the lower mount clamp threads fatigued and more prone to stripping but also is a royal pain. Now we can just turn the jack screw back to loosen the chain, change our sprocket, and turn it back to the perfect tension. It takes seconds and does a better job. Faster and better-Yay!
Is the QPT a tested piece?
Being racers we know that anything that helps in the pits but doesn't help us finish races is something we don't need. Over the years there has been many gimmicks that we have been presented with. We know that in order for this product to be successful we needed something that just plain worked. After getting the part to work on the kart we realized we needed a way to better test the mount for long term durability. We developed a completely computer controlled test stand to mimic the kart and test the mount in an extreme condition. This allowed us to run the mounts out a couple seasons rather than just a couple track sessions to look for issues. This is why the design took 2 years to complete. Issues did show up and it became a matter of so many things to get it to work. From materials, to coating, to clearances and tensions. But, now we feel we have it, and not till then did we release it to the racer.
Is the QPT patented?
We are working on it. We feel the idea is worth protecting.
Can the QPT move when not wanted?
This is racing, extreme conditions of the unknown are always a possible and we can't warranty or guarantee any such claims, that things could not happen. Once purchased the racer takes on the responsibility of the part and its maintenance as in any racing product because every situation is its own. But we contest that the QPT is less likely to fail than current mount on the market. Each system has redundancy to fight against any chance of unwanted movement. The mount uprights are serrated where they meet the frame to reduce the mount shifting. The clamps can be run with two bolts on each so that it is extra secure (can be run with one also) The jack screw itself has a friction system built into it to stop it from turning from vibration if the main hold downs were left loose. The plate hold down clamps have two locking mechanisms and also extra thread to keep it from ever coming apart completely if assembled wrong. So even if something was assembled wrong/left loose the mount has multiple fail safes in place to make sure you can still finish a race. This goes with our theory that our product can only succeed if you do at the track!
How much side to side movement does the mount have?
The QPT can move side to side in set increments of .75". See illustration. Please note that though some karts may require more offset than this it is highly recommended that you limit the offset. Extreme offset can mess with the kart dynamics and the engine block. For this reason this is the max offset we are comfortable with. If possible modifying the kart to limit the offset is highly recommended to keep everything working at its optimum performance.
Can I lock the QPT down solid and use as a conventional mount?
Yes you can lock the QPT function out on the mount. Though it should not be needed the racer can lock out the QPT function or lock it down 100% so that it would function the same as a conventional mount.