Revving Up with Super Torque for Turbocharged Excitement: Yamaha VMAX 1680 Custom by Esper

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Esper's V-MAX 1680

At first glance, you can tell that this is a turbocharged version of the Yamaha VMAX (1700cc version that was available from 2008 to 2017). ESPER, a shop that knows turbochargers and the VMAX series like the back of their hand, took up the reins on this project. Even so, it must have been a lot of work. The intercooler and turbo unit you can see are both from an R35 GT-R (Nissan). They were installed almost as is. The engine itself is currently stock for durability, so it is rated at 250ps at 0.5kg/cm2 of boost. It's been built as NA (naturally aspirated) and has a lot of torque. It is not difficult to install, and ESPER recommends it.

The clutch has been strengthened, but no injectors have been added, as is often the case with supercharging. The return pipe for the oil line to lubricate the turbine has been discreetly added. The silencer is a Vance & Hines, as the owner wanted to keep their original slip-on. Looking at the left side of the vehicle, the auxiliary equipment is lined up in the same manner as the right side. The symmetrical appearance is one of the themes of this custom. The frontal view is powerful, but the symmetry also makes it look simple. The owner is quite attached to his VMAX and was very satisfied with the specifications and characteristics. There are plans to change the pistons and connecting rods in the future to increase the boost. This TurboMAX is a great, practical, fun, and ever evolving machine.

Electrical

A windshield was installed in the meter area and a boost gauge was added. The shift light in the upper right corner of the meter is a stock feature of the VMAX.

Bodyworks

Here is an image looking at the tank cover section from the seated position. As you can see, the intercoolers (which cool the supercharged air and increase filling efficiency) are lined up symmetrically.

Engine

The left side of the 1679cc V4 engine with 65 degree angle of incidence. The body and FI are currently stock, and an R35 GT-R intercooler/IHI turbine is symmetrically positioned. The funnel attached horizontally at the cylinder head is a dummy, and the actual supercharged fresh air enters the FI between the V-banks through the dummy tank section.

The supercharging section on the left. The exhaust from the lower exhaust pipe into the turbo turns the turbine, and the coaxial turbine supercharges the fresh air entering from the front side of the unit (left side of the photo) and flows to the intercooler on the front side of the body, the throttle body between the engine V-banks, and to the engine.

Currently, the V4 engine delivers 250ps at 0.5kg/cm2 boost pressure (150ps stock/200ps export spec). It has the capacity to reach 650ps if boost is increased by modifying the pistons and connecting rods/adding injectors. Naturally, the clutch has also been strengthened.

Fresh air is sucked in from the center of the turbo unit, where the net is stretched. It is then supercharged and flows to the front side. An oil return path was also added to the turbine.

Chassis

The rear brake pedal has an enlarged pedal area for secure operation. The step is in the stock position with supercharged fresh air passing right next to it.

The 3.50-18/6.00-18 size wheels, φ52mm front forks, 6-piston calipers, and other suspension components, as well as the frame, remain stock.

Gallery

Specifications

Part	Details
Carb / Intake	NISSAN Skyline GTR(R35) IHI OEM Turbine NISSAN Skyline GTR(R35) OEM Intercooler
Exhaust	VANCE & HINES CS ONE DUAL Black Silencer
Handle / Steering	DEPO RACING WA Boost Meter

Original Source of this Article

Heritage & Legends