When utilizing Jake Raby's DTM VW cooling system, cooler cylinders and heads improve engine efficiency (more horsepower), increase engine longevity, and even improve fuel economy! The …

What does “DTM” stand for?? DOWN THE MIDDLE! Just as our logo above illustrates… It’s the only cooling system available for the VW Type one and VW/ Porsche Type 4 aircooled …

Take advantage of the Type 4 Store's engine rebuild kits featuring Nickies cylinders, camshaft kits with custom cam grinds, DTM upright conversion cooling systems, as well as everything else …

Raby's Aircooled Technology Type 1 DTM (Down The Middle) Fan Shroud Kit,11001 is the finest system for the Type 1 engine! Jake Raby used hundreds of gallons of fuel on his dyno to …

Carburetion - Dual carbs or independent runner EFI. Single carbs, stock or aftermarket are not compatible due to the offset shroud design. Note: The DTM was designed for magnesium, OE …

If you have ANY VW Type I / Type II gearbox or Porsche 901/915 gearbox, we can set you up with a no guesswork interchange. The Type IV slides right in. Contact us for more detailed info …

We’re coupling the best components & procedures to create advanced Raby’s Aircooled Technology engines for vintage VW and Porsche. All Aircooled Technology engines are based …

2006年6月9日 · The DTM provides much more stable average head temperatures across all 4 cylinders compared to stock while also giving a lower average temperature. You can read on …

2024年9月20日 · The Type 1 DTM is listed on the LM site under TypeIV Store>DTM Cooling Systems (see below). It's the first one showing in the options. And it uses a stock VW Type 1 …

2016年1月21日 · The quickest way to imbalance the work that makes the DTM efficient, is to start adding air ducts to it. Please do not do this, as every attempt I made resulted in a completely …