Boost Leash Boost Controller (BEST SELLER)

Billet Map/pressure sensor comes standard now

New Color options available at the bottom. Look at pics to see colors available. Controller comes standard in bare billet now.

There is a new option at the bottom for the Boost Leash. You have the option of upgrading to a Billet Map sensor or an upgrade to the PRO version of the Boost Leash. The Pro version comes with the billet map, Pro software and upgraded solenoids. The Pro version allows control in .1 psi increments. The standard controller does 1psi increments. I don't recommend this version unless you run co2 or compressed air type setup.

The Boost Leash Boost Controller by Leash Electronics.

Street/Strip uses of manifold pressure OR co2 pressure for control and it does away with the activation wire and the controller automaticly activates when it senses more that 2psi boost which makes it work VERY well on street cars since its automatic. Simple 3 wire hookup: 12volt, ground, and launch input.

See Video Demo at

The Boost Leash is a 5 stage time based plus launch stage Race/Street style boost controller.  This unit is very accurate and consistant. Now since it's a gate pressure controller you have to understand that the numbers you set in the controller ARE NOT boost. It's gate pressure. Let me explain what it does. So you have wastegates to control boost and it's normally set by a spring in the wastegate that gives you X amount of boost. Well what this controller does is gives you a imaginary varible spring . You start out by putting at least a 3-5psi spring if you're running co2 or compressed air. If you're running manifold pressure you will need to run a spring thats half what your max boost will be. And the way this controller works is that you set gate pressure curves and these curve are pressure thats applied to the same area in the wastegate as the springs are in. Your programmed gate pressure curve does the same thing as the springs do only you can vary it with the pressure curves. So you have a imaginary spring that you can tell what to do. Now keep in mind that you will have to experiment to find what gate pressures give what boost psi results. Example...15psi on the controller might give you 10psi boost. You just have to figure that out so start with low gate psi settings at first till you get an idea of what boosts you can expect. This is the style boost controller used by the fastest heads up racing in the country. The Boost Leash has a launch stage that you program the desired launch psi. It has 5 time based stages that start after the launch input is activated and released. The 5 stages has time delay, rate of pressure increase, and psi for each stage. There is also a datalog screen that datalogs the time, boost and Gate psi curve so you can see what the pressure curve looks like which aids in tuning. This is a very simple unit. The Boost Leash will work with most turbo and supercharger systems. If you choose to run CO2 you need is a CO2 bottle, adjustable regulator, fittings and hoses. Come with 5 year warranty and personal customer support and aid in tuning. Comparable units sell for $900+. These will sell for $550. Email for any questions


I sell line and fitting kits in the Boost control section. If you need a co2 bottle and regulator I recommend these part numbers from

Bottle        555-60207

Regulator  376-RG

If you click on any pictures and they seem blurry at first they should go high quality in a few seconds or up to 1 minute. Just wait and the pic will be very high quality!

Boost Leash Boost Controller (BEST SELLER)
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  • Item #: BL2011
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Price $560.00