Frequently asked questions
We did look at various sizes including the GT17, we chose the GT15 because it gave us the most engine size and good boost. Anything more than double the stock HP we will drastically shorten engine life.
The GT15 is capable of delivering up to 225 HP and 15 psi of boost. We recommend a lower boost pressure so you can use your stock engine.
The GT17 will provide even higher boost pressure but you need to modify your engine to do this due to the added stress on the internal components.
Our turbo can provide boost between 6 and 15 psi depending on how much power you want. This also depends on what engine you have.
The rule of thumb is every 1 psi of boost will give you a 7% increase in power. So at 15 psi of boost, this will double your stock engine HP. The more you boost your engine, the shorter your engine life span. We recommend starting off at 8 psi of boost and slowly working your way up from there. A boost gage on the dash is highly recommended.
Yes, if you have a carb engine, you will need to install a 12 volt electric fuel pump. This is easy to do since we have developed a simple recirculation system so you don't have to add any addition holes to your fuel tank.
If you already have a MPI or SPI system, your fuel pump is good. You may need to replace it if it is getting old and may not supply enough flow.
If you can fit one into your mini, they are always a good idea.
Your turbo will run in a more efficient area on the compressor map with one.
With an intercooler, you can run a lower boost pressure and for the same power as an engine without one (about 3 psi lower)
We have tried our turbo system with and without an intercooler and have not measured much difference.
We think the best upgrade is the fuel injection system since it allows you to precisely tune your spark and fuel system.
Our Intake Assembly JET Master Kit is highly recommended since it works better than any other carburetor we have tried
Our Ultimate Ignition Upgrade JET Master Kit will really improve the spark timing over the stock ignition
The carb system does work well for those on a budget. The carb system can be dialed in with an Air Fuel Ratio Gage mounted on the dash.
Obviously, if you can afford it, the fuel injection / spark system is the best for our turbo kit. It will provide you with the best control over fuel and spark that allows you to make quick changes to both.
We recommend the NGK Iridium BPR6EIX spark plugs that we have for sale on our website (please click the link)
https://www.jetmotorsmini.com/product-page/spark-plugs-ngk-iridium-bpr6eix
There is no correct or wrong answer for this one.
The lower the compression ratio, the higher the boost potential (more HP)
The higher the compression ratio, the improvement in turbo responsiveness (lower HP)
It is important to know and understand what your engines compression ratio is depending if it's stock or modified. This will help you know how much boost you can give your engine.
