Crankshafts

[gear_dawg]

Does anyone know the basic difference between gas and diesel engine crankshafts? From what I have seen it is usually the amount of stroke capacity. Furthermore can you trade them out making your gas engine produce the pressure equal to that of a diesel. Any feedback would be interesting. by the way, anyone know how to rig an alternator to non-stop output for amps, and how do you rig it to over amp?

Thanks,
Gear

P.S. did i spell diesel right? doh!

[sharkie17]

on a diesel engine stroke is lot longer to creat higher compression needed for combustion of diesel fuel. but with a longer stroke, you get the added bonus of amazing amount of torque... so you get a whole lot of torque with the oil burner...

as for the second question... hmm.. i dont know about trading out a diesel crankshaft for a gas one... ive just never heard anything like that done before.. ever.

as far as rigging the alternator for non stop output... well, i guess you can run your car all the time... that would do it.. but your best bet is to have a second battery and have your stereo system work off of that exclusively. (that will also save your alternator). use a gel pack battery such as Optima yellowtop (which is in my car).

you can get your alternator rewound which will make it a HO (high output) or you can purchase a HO alternator from stereo shop.

[Monstrobolaxa]

Besides the technical reasons needed for the high compression I'd also add that probably it will be slightly "bigger"....bigger in the sense that since it will have to handle more torque it will have to be able to withstand it so probably 2 crankshafts of the same material and same size 1 for a diesel and another for a gasoline car, probably the diesel one would be heavier, cause it will have more material to increase it's torsional stiffness! (not an expert just an opinion, but logical from a material mechanics point of view)

[gear_dawg]

Interesting...

Here is/was my idea(s):

Power Plant:
Trade out diesel crankshaft;wrist pins; rod bearings; and connecting rods.

Drive Train:
Remove 1st gear; possibly even 2nd

Idea: By trading out these said parts in the power plant, this would have a significant increase in horse power as well as low end torqe. Couple this with a (Turbo Fan: http://travel.howstuffworks.com/turbine6.htm) type of supercharger and this said power plant would be off the hook.

Now as to the Drive train, with this kind of low end torqe output most likely you wouldnt even need 1st or possibly 2nd gear(s).

Advantages: This would provide an incredible amount of power in a very small volumetric area; in other words, significant power to weight ratio

Disadvantages: Compression might be too great for the block to handle over a set period of time. Engine wear and tear would be dramatic in about every sense.

This is my idea, any feedback on this?

Thanks,
Gear

[Monstrobolaxa]

Too much clutch wear.....unless you're using a torque converter....and will it be able to acelerate quickly?