HitMaster In-Line Hydraulic 2-Stage Clutch Hit Control System

Got a modern musclecar with a clutch pedal? How about a right hand drive car that can't easily use our original ClutchTamer? Every manual transmission car has it's own unique "sweet spot" in the clutch pedal's release travel. That's the spot in pedal travel where the clutch hits just right, and slips a perfect amount to efficiently launch the car. Below that sweet spot the clutch doesn't grab hard enough, allowing it to slip too much which may damage the clutch. Above that sweet spot the clutch grabs too quickly, causing it to either bog the engine, spin the tires, or break parts. But in between those two extremes, there lays a perfect "sweet spot" level of slippage that doesn't either damage the clutch or bog the engine.

Get The Perfect Radial Friendly Dead-Hook Launch With Our NEW "HitMaster" In-Line Hydraulic Clutch Hit Control System !

Our HitMaster 2 stage system makes it easy to consistently walk that fine line between bogging and spinning, even with a radial! Our exclusive 1st stage of INSTANT CONTROLLED HIT allows the clutch slip just long enough to prevent the bog, then the 2nd stage takes over to make sure the clutch doesn't slip any longer than it needs to! No more slow reaction times, no more inconsistency, no more breaking stuff. In the end you get an efficient controlled dead hook launch that's also radial friendly and doesn't break parts!

At the heart of our 2 stage system is our "patent pending" HitMaster 1st stage control valve (pictured above). This innovative valve gives you the unique ability to dial in exactly how hard the 1st stage of your clutch initially hits, while also allowing that controlled hit to happen the instant you release the clutch pedal. Our exclusive HitMaster valve completely eliminates the reaction time delay that plagues other hydraulic launch control systems. With simple hose connections, it's easy to adapt our system to almost any car that uses a hydraulic clutch release system. Easily hidden as well, this system is also ideal for owners of modern musclecars that want an instant hassle free and efficient launch that eliminates wheel-hop while putting far less stress on those fragile oem drivetrain parts!

HitMaster system components come with female 1/8" npt fluid ports. From there, it's pretty easy to plumb the system with just about any style of fittings/hose you might choose. The typical hydraulic clutch release system operates on less than 500psi and although the system could be plumbed with hard line, we prefer using either nylon tubing or hose as the added flexibility can make it easier to bleed the system.
The least expensive way to plumb the system is to use DOT 1/4" nylon tubing and fittings that are typically used in semi truck air brake systems. This type of tubing/fittings can be found at most well stocked auto and truck supply shops. Even though these parts are typically rated for a 300psi working pressure, the tubing burst pressure is up around 1200psi. It's the same grade of nylon tubing that you will find inside many stainless braided hose assemblies. Just be sure to protect the exposed nylon tubing from direct heat sources like exhaust components with some sort of insulating sleeve.
If you choose to plumb the system with AN style fittings and hose, either -3 or -4 sizes are suitable. The smaller passages inside -3 fittings seem to work just as well as -4, but we prefer the larger passages of -4 just to make sure the system reacts as quick as possible. AN fittings are basically the same as JIC as far as sealing geometry, so it's pretty common to see mixing/matching of the two in an automotive application. JIC can be found at hydraulic supply shops. JIC fittings and hose ends are typically made of steel and are generally less expensive than the typical anodized aluminum AN counterpart.

Basic System Configuration...
On the right, you will see a plumbing schematic of our preferred basic system configuration. Although we do have the ability to build the HitMaster valve as a stand alone clutch hit control system for special circumstances, we generally prefer to add circuits externally as this gives more flexibility to add features later as vehicle performance evolves.

The external 2nd stage transition valve and 1st to 2nd stage transition timer add value to the system overall, as the stepped 1st to 2nd stage transition allows us to hit even deeper within the sweet spot zone than was possible with the original ClutchTamer's bleed orifice design. They also make full clutch clamp pressure available much sooner than the original ClutchTamer design, which can be important for getting the most out of turbo or nitrous applications!

Alternative System Configurations...
Adding an adjustable bleed valve in parallel to the HitMaster valve basically makes the system act exactly like our original ClutchTamer during launch.
Adding dual timers gives you the ability to have separately adjustable 1st to 2nd stage transition points for launch and shifts.

HitMaster 1st stage control valve adjustment...
The HitMaster valve uses a simple dial type adjustment and should be located within easy reach of the driver's seat. This allows the driver to dial in more/less "initial hit" of the clutch without even unbuckling his belts! This can be a great advantage, as it allows the driver to make a last minute assessment of track conditions and then adjust clutch hit as needed before staging.

HitMaster Valve Adjustment...
Rotate HitMaster dial clockwise = softer hit
Rotate HitMaster dial counter-clockwise = crisper hit

For best ET, you generally want to stage at about 2000rpm above your engine's torque peak. From there, adjust the HitMaster system for the crispest clutch hit you can get. We define a crisp hit as one where the clutch hits as deep within the sweet spot zone as possible, so deep it's just short of spinning the tires. Basically that means keep adding counter-clockwise turns to the HitMaster valve adjustment with each run, until either the tires start spinning or the 60's stop improving, then return to the previous setting.

On the other hand if the tires spin instantly on the hit, keep adding clockwise turns to the HitMaster valve adjustment with each run, until either the tires stop spinning or the 60's stop improving.

1st to 2nd Stage Transition Timer Adjustment...
Start with an initial transition timer setting of about 0.7sec. If the tires initially stick for a few feet but then start spinning before 15'-20' into the run, add 0.10sec to the timer setting with each run until the tires quit spinning or the 60's stop improving.

It's not uncommon for our street/strip customers to find up to a 0.8sec improvement in 1/4mi ET, along with much improved consistency.

Here's an article on our original ClutchTamer device in the April 2019 Issue of NMCA/NMRA's Fastest Street Car Magazine!!!

"CLUTCHTAMER HELPS MANUAL-TRANS MACHINES FLY" is how Fastest Street Car Magazine describes it's April Top Tech story.
In a 5 page feature article that starts on page 126, they also review some of the racers that are using it. CLICK HERE to check it out!

Pictured below on the left is the 2nd Stage Transition Valve which we mounted directly onto our Shop Mule's clutch master cylinder using a steel hydraulic "T" fitting. The upper line in the pic on the right side of the solenoid goes to the car's hydraulic throwout bearing. The two lower lines on the left pass thru the car's firewall on their way to the floor mounted HitMaster valve.


Pictured above on the right is the floor mounted location we chose for our Shop Mules HitMaster valve. Just under the front of the seat, you can also see the aluminum panel we made for experimenting with using separate transition timers for the launch and shifts.
.The timer on the left of the car is for launch, it is triggered by releasing of the line-loc switch.
.The timer on the right is for the shifts, it is triggered by a switch that's actuated by the clutch pedal.


HitMaster Clutch Hit Control Valve (1/8npt fluid ports)............$299.

2nd Stage Transition Valve (1/8npt fluid ports).................................$79.

1st to 2nd Stage Transition Timer (12v)................................................$39.

Shipping to a destination within the USA...........................................add $14.

Package price for all of the above including free shipping (USA only)....$399.