About RustoGusto

ABOUT RESTOGUSTO

We began in 2016 with a vision to make the world’s most beautiful sports car something more than just another “numbers matching” restoration.

We believed that such a legendary race and sports car’s performance should not be defined by 0-60mph in 7.3 seconds. Simply put, we wanted our E-type to attain supercar street performance.


  • 2017Introducing our Cylinder Head

    Because the cylinder head is the single most important determinant of a car’s power, in early 2017, we have developed the highest performing cylinder heads for the legendary, three time Le Mans winning XK6 Jaguar engine that the world has ever seen.
  • 2017Introducing the Twin Spark Ignition System

    In late 2017, we developed a Twin Spark Ignition System. This knocked 9 degrees of spark advance off allowing compression ratios of 10:1 on retail gasoline.
 

Having achieved our original goal to add 100 horsepower to a stock XK6 engine by changing only the cylinder head, we set our sights on other components that have a bearing on the cylinder head’s ability to produce power.

 
  • 2018Introduced the Customer Tuned Exhaust System

    In early 2018, we created a custom tuned exhaust system that would help the XK6 engine extract more power from the RG cylinder head.
  • 2018Introduced our Long Tube Header

    Later in 2018, we created a long tube header, which significantly increased bottom end torque.
  • 2018Our Custom Electronic Fuel Injection System

    Throughout 2018, we worked on a custom Electronic Fuel Injection system that would extract even more performance from our cylinder head. This system would resemble the original S.U. carburetors with all modern nuances hidden from sight. This work is nearly completed at the time we launched this version of our website.

CONTINUING OUR WORK

We continue to work on ideas that will further advance the performance of the XK6 engine and classic Jaguar cars that were fitted with this wonderful engine.

OUR PRODUCTS

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ABOUT OUR PRODUCTS


We have a variety of products and accessories that go with your E-Type.


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(203) 622-8200

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S P E C I F I C A T I O N S :

Cylinder Head:

• New chill-cast camshafts with high performance profiles:

– Intake Lift = 0.466” Duration 252 @ 0.050”
– Exhaust Lift = 0.426” Duration 248 @ 0.050”

• Large, 37mm Flat tappet Cam Followers, which run in the aluminum without the requirement for a bucket bore

• Ferrea® stainless steel valves sized to the 4.7 liter displacement:

– Intake 1.950”
– Exhaust 1.562”

• Nano material valve seat CNC radial cut & blended to runner bowls
                                                Read More

Twin Spark Ignition:

• RG Twin Spark distributor with hall effect sensor for crank position detection
• Preprogramed Spark Controller with MAP sensing
• Temperature sensor & Fan control relay
• Two Bosch coils with separate Bosch coil ignitors
• Wiring harness that conceals Spark Control unit inside left door hinge cavity

4.7 Stroker Kit:

RG truly believes that anyone rebuilding a 4.2 liter Jaguar XK6 engine should seriously consider stroking their engine – if they can afford to.  It makes a HUGE difference in driving experience!  When you stop to consider that pistons are expendable and that connecting rods and crankshafts must be reconditioned at a substantial cost to properly rebuild an XK’s bottom end, converting to a Stroker engine is not much more expense.

Each component in the kit is designed to work with the other components to yield the very finest stroker kit available. The RG Stroker crankshaft is unique from other 4.7 liter crankshafts on the market.  It uses Chevrolet “Clevite” Small Block rod bearings instead of the standard Jaguar rod bearings to reduce rotating mass.  Lower rotating mass means higher safe RPM operating range:

  • Forged piston & rod castings designed as high performance replacements for heavier original parts
  • Rods use Small Block Chevrolet “Clevite” bearings to reduce crankshaft rotating mass and connecting rod mass
  • Standard Jaguar connecting rods cannot be used with the RG stroker crankshaft
  • Pistons will yield a 10:1 compression ratio with RG cylinder head
  • RG Stroker crankshaft is made from S7 tool steel on state of the art CNC machine in the USA
  • Rod journals are hollowed to reduce rotating mass
  • Counterweights are balanced to lower mass connecting rods and pistons
  • Rear main journal has been machined to fit a modern rear seal to reduce oil leaking
  • Rear seal adaptor is included

S P E C I F I C A T I O N S :

Cylinder Head:

• New chill cast camshafts with high performance profiles:

– Intake Lift = 0.466” Duration 252 @ 0.050”
– Exhaust Lift = 0.426” Duration 248 @ 0.050”

• Large, 37mm Flat tappet Cam Followers, which run in the aluminum without the requirement for a bucket bore
• Ferrea® stainless steel valves sized to the 4.2 liter displacement:

– Intake 1.875”
– Exhaust 1.562”

• Nano material valve seat CNC radial cut & blended to runner bowls
                                                Read More

Twin Spark Ignition:

• RG Twin Spark distributor with hall effect sensor for crank position detection
• Preprogramed Spark Controller with MAP sensing
• Temperature sensor & Fan control relay
• Two Bosch coils with separate Bosch coil ignitors
• Wiring harness that conceals Spark Control unit inside left door hinge cavity

Optional CP‐Carrillo® Connecting Rod Set:

Going to high grade forged CP‐Carrillo® connecting rods makes higher safe RPM possible. Higher RPM allows the engine to extract more potential from the RG cylinder head. When upgrading these components, it is advisable to recondition the OEM crankshaft and to have it nitride finished.

• Forged rod castings designed as high performance replacements for heavier original parts
• Rods designed to connect to OEM crankshaft
• Pistons will yield a 10:1 compression ratio with RG cylinder head (as will original Jaguar “9:1” pistons)

S P E C I F I C A T I O N S :

Cylinder Head:

• New chill cast camshafts with high performance profiles:

– Intake Lift = 0.466” Duration 252 @ 0.050”
– Exhaust Lift = 0.426” Duration 248 @ 0.050”

• Large, 37mm Flat tappet Cam Followers, which run in the aluminum without the requirement for a bucket bore
• Ferrea® stainless steel valves sized to the 3.8 liter displacement:

– Intake 1.875”
– Exhaust 1.562”

• Nano material valve seat CNC radial cut & blended to runner bowls
                                                Read More

Piston Set:

• Universal forged CP‐Carrillo® piston for all bores – lighter than originals
• Piston accepts standard Jaguar connecting rod
• Piston profile produces 10:1 compression ratio when used with RG 3.8 liter cylinder head

Twin Spark Ignition:

• RG Twin Spark distributor with hall effect sensor for crank position detection
• Preprogramed Spark Controller with MAP sensing
• Temperature sensor & Fan control relay
• Two Bosch coils with separate Bosch coil ignitors
• Wiring harness that conceals Spark Control unit inside left door hinge cavity

Optional CP‐Carrillo® Connecting Rod Set:

Going to high grade forged CP‐Carrillo® connecting rods makes higher safe RPM possible. Higher RPM allows the engine to extract more potential from the RG cylinder head. When upgrading these components, it is advisable to recondition the OEM crankshaft and to have it nitride finished.

• Forged rod castings designed as high performance replacements for heavier original parts
• Lightweight forged connecting rods fit to OEM crankshaft