I'm new, so if this has been covered, just call me greasehead and point me in the right direction. I'm geeting ready to put an oil burner in my 84 blazer and I'm very interested in diesel torque, economy, longevity and the prospect of free fuel in the form of wvo, svo or biodiesel that I'll make from those myself. My question is: If you're running biodiesel or straight vegetable oil after starting with petro-diesel, can you also add a propane injection to further increase power and economy?

Thanks guys,
JP

sure.

Great!! Anyone know from experience or evidence which engine is best suited for using biodiesel, propane and makes the most power (with modifications, I'm sure) while getting the best mileage?

I have my Dmax on bio and lp, and it works great. However, I buy the bio, I haven't ever made any. If you have a choice of engines, I would recommend a direct injection turbo motor for best economy and power. Put in an older Cummins.

Thanks for the replies.... which lead me to another question (and I have searched for the answer unsuccessfully thus far): What are the weights of these engines... is the Cummins a lot heavier than the 6.5 or 6.2?

of the three engines you listed, the cummins would be the best to use in your blazer, assuming it can be fitted and connedted to the tranny. I think it would work well for your purposes. There are a lot of parts and mods out there for the cummins since it has been around for a long time.

I've neard folks talk about the older Cummins instead of the newer ones.... why is that? Are the injector pumps better? Fewer electronics to deal with? They'd be cheaper I'm sure, but what's the additional draw?

I should've asked this already... what tranny should I use for this setup? Should I try to find and fork over the dough for an Allison or is a 4L80, 4L80E, or even a built-up 700R4 what I need? I want to make a lot of power while not breaking parts... you know.. cake and eat it too.

Cummins = broken parts! Get the heaviest beefiest parts you can find, absolutely no to 700r4. Turbo 400 should be ok if built right and power is kept within reason. Turbo 400 were also used in some bread trucks behind a 4bt cummins(same bolt pattern as the 6bt)

The problem with a Turbo 400 is that w/o an overdrive, you will have to have a fairly high rear axle ratio to do any speed. I recommend a 4L80E. It would require a computer to run it, but they are available aftermarket.