ken

"VW" = ?

Running with the BUG theme, the early ones had an air cooled 25HP =19kw engines. Depending on driving style, replacement motors can be found in 65,75,90,145and up HP configurations. Lets go twin turbo and see 600HP. The more HP you have and the more weight you have the more fuel you will use. Plus about 100 other factors that determine fuel usage can be factored in after you get the engine. I have read you question more times than I can count and I am still confused.

I'll rephrase my question. I want to us a 25 hp Honda air-cooled engine, in a VW. How big of a motor will it take to drive 65 mph, how big of a oil pump will it take supply the hydraulic motor or motors? I have invented a hydraulic piston mud pump for the drilling industry and believe we can make a car go 70 mph using hydraulic oil.

Thanks, ken

Ken;

If you can get 65 MPH in a VW Bug with a 25 HP Engine and a Geared Drive, you should be able to get somewhere around 50 MPH changing it to Hydraulic Pump/Motor drive. That is when all components are new, with normal wear the drive will get weaker and speed will derease as the running hours build. Most Hydraulic Pumps and Motors operate at about 85% Efficiency new and that efficiency drops as they wear and bypass more oil.

On the other hand, if you wanted to tow your house that has been placed on wheels you could use the 25 HP engine driving a Hydraulic Pump that was sending oil flow to Hydraulic Motors on each of your Bug's wheels, and tow it almost anywhere at 0.5 MPH.

There is no Magic to Hydraulic Drives. You can get a lot of torque out of them. That is why you see so many of them on Mobile Construction Equipment. That equipment runs very few Races but it does move a lot of weight.