Okay, so I am really torn between my love of power and my love of the environment. I have most of the parts for a decent m20 turbo setup. My question is, will the m21 take the abuse of a hx35 or hx40 at moderate boost levels STOCK? Can I even rebuild it to take high power levels? If no one knows, is there an m21 resource I can access? In addition, does anyone know how hard it is to convert these motors to bio-diesel?
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thanks...Comment
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I would try it anyways if I had the resources. Not the MOAR POWAH route on the M21, just Bio-diesel or Vegetable Oil. I want a Vegetable Oil 524td so bad, I can taste it.Slicktop City!Comment
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The m21 is a ticking time bomb when it comes to boost. They crack heads/blocks very easily. The only way to add some more boost safely is to not run it too hard and have a big intercooler. using this method you can get about 20-25 more hp out of them. The m21 is absolutely terrible for the environment, a well catalyzed m20 is 3-400% better. doubt you can rebuild these for more power as the weak point is the block.Originally posted by e30esque View Post
You can run bio diesel on it, depends what route you go. I can tell you from personal experience that running svo even at a 30% mix is terrible for an m21. it'll buck and sputter and be unhappy. The only real way I can see to run an m21 on svo/wvo here is to either do the transgenerification (sp?) or to do a dual tank setup. What you basically want is for the fuel to atomize properly in the cylinder. veg oil will just fall into the cylinder and sometimes even end up in the oil contaminating it. Both solutions for this problem are a pita.
JulienComment
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There we go. Thanks Julien, that was the kinda response I was looking for. So, this seems like a futile endeavor. Does anyone know of a possible diesel candidate that would work better than the m21 that I could fit between the frame rails? Also, is a high powered Bio-D engine just plain stupid? I really don't know here, just trying to see what options I have.Originally posted by redbull 325is View PostComment
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When I used to be heavy into my Wagoneer there was a lot of talk (and some action) on swapping the AMC motors for Cummins diesels. Unfortunately, the biggest obstacle for most people was rationalizing the cost to swap out the engine, computer, drivetrain, etc. You would have to drive many thousands of miles to get your money back over simply maintaining/repairing/replacing your gas engine. And that was a couple years ago when diesel fuel was more reasonably priced. I looked up at the board while I was at the station the other day: $4.15 a gallon for diesel. So much for savings.
If you are bent on running a veggie oil, I believe the the older mercedes lap it right up with less modification than most.Originally posted by chileelkyComment
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