Transporter (Bus) (through 1967)

Early Buses (to 1967)

Once again, Type IV power is a bolt in replacement. These vehicles need more power, and they can get it with a Type IV engine! The stock reduction boxes can be used with a Type IV, but it is not the best choice, as the TIV has more than double the stock torque of the Type I engine. When running TIV power the reduction boxes simply are not a needed item. VW intended them to reduce the load placed and increase RPM (for added cooling fan speeds) on the small TI engines that buses came factory with. When a TIV is added with our Awesome MassIVe DTM shroud all the cooling issues are a thing of the past.

If you have an early Bus and want more power while gaining reliability and rigidity, the Type IV is the way to go. The nice thing is that an early Bus with a Type IV power plant never needs that dreaded downshift back into the power band to climb a hill. That’s a huge plus. With a TIV powered early bus it actually can run at highway speeds on the freeway for hours at a time, it feels more like a modern car! The early bus needs a good “Kick in the pants” for today’s driving styles and the TIV completes that task with no problems at all!

The conversion is much like the Beetle conversion as the two share the same type of transaxle case, and input shaft so you will need the slightly modified flywheel we speak of in the Beetle description (we offer this). The early bus also requires an upright conversion kit. Our MassIVe DTM Is the best choice by far. Our system will effectively cool the engine, even better than the stock arrangement, and does so with a unique appeal.

Our MassIVe DTM shroud coupled to any TIV engine and installed in an early bus is a great thing. The shroud installs onto the engine quickly and easily. This is especially true if you opt for our deluxe kit with all new TI cooling parts and our water-jet cut sheet aluminum air sealing kit.

If your Bus conversion will keep the original early gearbox you will only need 3 later model VW pieces (release bearing, clutch cross shaft, and a release bearing guide, all of which we sell in a kit just for this) to bolt the TIV engine to your current gearbox. If you have a post 1971 gearbox for your reduction box elimination (not required) no conversion pieces are needed and the engine is a direct bolt up. The conversion enthusiast can opt for one of our conversion gearboxes that’s 100% set up for the TIV engine and is ready to install. This gives better fuel economy and better torque transfer with the now larger engine. These are available both set up for reduction boxes, or without.

The installation of the engine into your vehicle is easy, it installs just like a standard Type 1 engine with dual carburetors and in most cases can be done in about the same amount of time. Since the rear of the early bus is removable you can slide the engine in in 5 minutes, and then bolt it up!

Currently there are only a few exhaust systems for the TIV conversion. We are working on getting several of these imported and offering them as well. These exhaust systems do not incorporate standard heater boxes and fan shroud pressurized air for heat delivery are more difficult to arrange with a TIV conversion.

The best method of updating your heating system is with a “Gas heater”. These were original equipment on many VWs and we keep a few of them around to sell most of the time.

The conversion engine will need to be fitted with Dual Carburetors, or a Fuel injection system that uses twin throttle bodies with hex bar linkage. The design of the shroud does not allow the use of a single carburetor. Single carburetors on large engines like the TIV have been proven to be inefficient, so this is not an issue with most conversion enthusiasts.

One of the best parts of our cooling system is that the engine does not look like a 911, or a TI, it looks like something many people have never seen, and that will separate you at car shows and events.

Of course, if you desire your conversion engine to be designed, balanced, blueprinted assembled and thoroughly dyno tested by a professional, then see our complete conversion engines on our sister site Do it all once and forget it!