Turbo Diesel bike running

3cyl, 1000cc yanmar diesel. Engine built from block up,bored, timing advanced, special oil pan and pickup, all tolerances to perfect specs. injection pump mods, turbocharged with gt15turbo and a ton more go goodies. 3.35 inch open primary, 6 speed ultima trans. This bike hauls.

Category:

Autos & Vehicles

Tags:

• turbo
• diesel
• bike
• chopper
• bobber
• custom
• motorcycle

[Vallejoonmamas]

@muddstrosity How much less awesome would it be?

[clydesdaleorama]

you did a verry nice jobe :) i really like your bike

[muddstrosity]

How much less would this bike weigh with a conventional gas engine?

[therealTOTOfan]

@therealTOTOfan gets enough air,because the built in throttle blocks the air stream too much. and the engine wouldnt run with that massive surplus of air.if you could explain that pls?

[therealTOTOfan]

@MrAndyye i didnt mean THAT modern diesel engines. my 2000 nissan almera doesnt have a throttle so its a more modern car but not that modern :P i still cant figure out how the engine.......

[MrAndyye]

@therealTOTOfan Modern diesel engines DO have a throttle, which is used to generate intake manifold vacuum, thereby allowing the introduction of exhaust gas (see EGR) to lower combustion temperatures and thereby minimize NOx production. Throttle gives ECU the ability to add extra air when the electronic throttle control reports acceleration and airflow sensor reports insufficient flow of intake air.

[therealTOTOfan]

@therealTOTOfan .....because with higher rpms the engine sucks in more air and makes the mixture normal. so it smokes only when reving. so i take back my comment about the mixture being too rich.

[therealTOTOfan]

@MrAndyye even in more modern diesel engines im not quite sure how it should add some extre air? the engine sucks in so much air as the pistons create vacuum by moving downwards. (unlike a petrol car which has a throttle valve to control the amount of air flowing in, diesel dont have it so its always max air intake). to increase rpm, more diesel is injected thus making the mixture richer, creating smoke. but i have to admit. once the engine reaches higher rpms, the smoke disappears....

[MrAndyye]

@therealTOTOfan a much better answer now. However the full answer is: it's a kind of old school diesel engine, so there's no electronic control unit, which would add some more air by anticipation. Every mechanically controlled diesel produces smoke when revs are quickly increased, but the exhaust should be clean in either high revs and low revs modes when the engine speed is constant.

[therealTOTOfan]

@MrAndyye nevertheless. once air and fuel are in the combustion chamber they are indeed a mixture. diesel engines naturally run at a lean mixture at this point, but as soon as it reaches full load (max torque)theres so much diesel injected that this mixture becomes "richer" towards lambda = 1.at this point the combustion becomes smokey, because this is how diesel burns. with black smoke.the engine obviously cant suck in more air because it runs as if on full throttle,turbochargers help