Early Buses (to 1967)


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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. The early bus also requires an upright conversion kit. Our MassIVe DTM Is the best choice by far, and of course, the only system that we will utilize for our engines. Our system will effectively cool the engine, even better than the stock arrangement, and does so with a unique appeal. It doesn’t look like a VW or Porsche engine- it looks like a DTM, and it looks like a Raby engine, which is what it is.. Why need to make it look like something it’s not?

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 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 a conversion gearbox 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 from several vendors. We can help you select the preferred gear ratios for your engine, tire size, and desired cruise speeds.

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. That’s ok, as they are high quality, and effective. 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 a modern version is sold by Espar, check them out on Google. These are stand alone units with thermostats, and they work really, really well!

The conversion engine will need to be fitted with Dual Carburetors. 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. Better than that, the damn thing just simply works…

Of course, if you desire your conversion engine to be designed, balanced, blueprinted assembled and thoroughly dyno tested by a professional, then choose our 2270cc TS Engine from the Engine Wizard!