maybe they are all pulling my leg, i told them what i was trying to do, they suggested using the 1hz-t pistons, from the bus, (not the first place i have heard it either, really i don't care, the pistons i am buying from a non glamourous source at $90.00 each have all the features we want to push more torque through this engine. i asked it before but got no answer, how much are people paying for these "custom" 1hz turbo pistons, i enquired about some through a guy who was importing them from england, he wanted about $2600.00 for six pistons and 1hd-t rods, the rods are $280.00 new each. as i have heard the odd american say on the television, "you do the math"
to the bio diesel and waste vegetable oil in di or idi engines......i believe they both run well on the alternate fuel. the consistancy of home made fuel, or fuel made from less consistant ingredients, may not be as consistant as the store bought aussie light crude we purchase as diesel. we have all heard of the bad batch of fuel stuffing things up? no? well you can be lucky and just get the bacteria that lives on the miniscus between the water in the bottom of the tank and the fuel (its black and slimey), this just costs a half dozen filters and some chemical. real tainted fuel may stuff the inj pump and or injectors. if this is more likely to happen whilst using home made or less consistant fuel, the cost of a set of 1hz injectors is about $350.00 exchange for a set of six. a mate of mine had a landrover 5 cyl diesel which he sold because the replacement injectors he needed for it were in the order of $2500.00. the point i am making is that if it happens every two years and you do 30,000km per year. over the life of the engine, 500,00km, it could cost an extra 8.3 by (2500-350=2150)=$17845.00 in maintainance costs. i have access to a pop tester and wet and dry sandpaper, new pintle nozzles for the injectors are about $25.00 each. brand new injector pumps can be had for about $1600.00.
i can live with the heightened probability of fuel induced pump and injector maintanance costs, traded off against cheap fuel(also environmentaly sustainable), when the limits of these increased maintanance costs are kept in check with cheap parts.
further to this, simple, low pressure, indirect injection diesel fuel systems will tolerate more variance in volatility, lubricity and residual deposits than a direct injection fuel system, let alone a common rail with 20000psi injection pressure.
