Quote from: libbydiesel on March 21, 2013, 09:12:04 amQuote from: 8v-of-fury on March 21, 2013, 12:07:07 amQuote from: libbydiesel on March 20, 2013, 11:58:22 pmThe IDIs have a greater RPM range, tho, so it evens out and all else equal, they will make the same power. Do they though? Why would a 1Z/AHU/ALH not spin the same 6000 rpms that limits the Bosch VE pump?Quote from: libbydiesel on March 20, 2013, 11:58:22 pmIDI will burn 10-15% more fuel for the same power, tho, and drop pre-chambers every so often...This is enough for me to wave good-bye and never look back haha.Yes, due to the different combustion properties of the IDI and TDI, the rpm range is expanded for the IDI at the expense of fuel economy. That is WHY IDI engines were produced. When the rabbit diesel came out, DI engines had a hard time making it past 2,000 rpms making them unsuitable for automotive use. Changes in injection technology have massively increased the DI rpm range but it is still more limited than the IDIs. The pre-chamber issue is a big deal to me as well. diesel mekken has built an inline pump that went on to a tdi pulling tractor, he says it pulls to over 10,000 rpm. i used to think the same thing but now i am not so sure. a guy in hungary sent me a video of a buggy with a 1.6tdi built with tdi pistons and head with a 1.5 crank, he buillt the pump for it, he says it revs to 5500.
Quote from: 8v-of-fury on March 21, 2013, 12:07:07 amQuote from: libbydiesel on March 20, 2013, 11:58:22 pmThe IDIs have a greater RPM range, tho, so it evens out and all else equal, they will make the same power. Do they though? Why would a 1Z/AHU/ALH not spin the same 6000 rpms that limits the Bosch VE pump?Quote from: libbydiesel on March 20, 2013, 11:58:22 pmIDI will burn 10-15% more fuel for the same power, tho, and drop pre-chambers every so often...This is enough for me to wave good-bye and never look back haha.Yes, due to the different combustion properties of the IDI and TDI, the rpm range is expanded for the IDI at the expense of fuel economy. That is WHY IDI engines were produced. When the rabbit diesel came out, DI engines had a hard time making it past 2,000 rpms making them unsuitable for automotive use. Changes in injection technology have massively increased the DI rpm range but it is still more limited than the IDIs. The pre-chamber issue is a big deal to me as well.
Quote from: libbydiesel on March 20, 2013, 11:58:22 pmThe IDIs have a greater RPM range, tho, so it evens out and all else equal, they will make the same power. Do they though? Why would a 1Z/AHU/ALH not spin the same 6000 rpms that limits the Bosch VE pump?Quote from: libbydiesel on March 20, 2013, 11:58:22 pmIDI will burn 10-15% more fuel for the same power, tho, and drop pre-chambers every so often...This is enough for me to wave good-bye and never look back haha.
The IDIs have a greater RPM range, tho, so it evens out and all else equal, they will make the same power.
IDI will burn 10-15% more fuel for the same power, tho, and drop pre-chambers every so often...
mine spins 6 grand on a stock 9mm pump, turned all the way up..
had a friend with a 1.9td,with a maxxed out 9mm pump.he changed to a 10mm(not a 11mm!) and he needed to make the fuel screw almost stick out to match the same power levels...also,at high rpm a bigger plunger will benefit in eficiency in burn as it will inject more fuel in the same time.a 9mm could inject the same fuel but most times out of time resulting in smoke but no power.on a modded engine tdi will win in reliability,but on my head its just because IDI´s investigation stoped many years ago.~with the right materials and developement i think those problems would be over.but i think its like 2 stroke engines...they are smokey,noisier and eat more fuel but damn!they are fun lolsome factors make 2 stroke engines research stop in favor of 4 stroke and i guess its very hard to invert that tendency,just like IDI engines...
...BTW your Bieber avatar is awesome.-Malone
Quote from: RabbitJockey on March 21, 2013, 01:18:15 pmQuote from: libbydiesel on March 21, 2013, 09:12:04 amQuote from: 8v-of-fury on March 21, 2013, 12:07:07 amQuote from: libbydiesel on March 20, 2013, 11:58:22 pmThe IDIs have a greater RPM range, tho, so it evens out and all else equal, they will make the same power. Do they though? Why would a 1Z/AHU/ALH not spin the same 6000 rpms that limits the Bosch VE pump?Quote from: libbydiesel on March 20, 2013, 11:58:22 pmIDI will burn 10-15% more fuel for the same power, tho, and drop pre-chambers every so often...This is enough for me to wave good-bye and never look back haha.Yes, due to the different combustion properties of the IDI and TDI, the rpm range is expanded for the IDI at the expense of fuel economy. That is WHY IDI engines were produced. When the rabbit diesel came out, DI engines had a hard time making it past 2,000 rpms making them unsuitable for automotive use. Changes in injection technology have massively increased the DI rpm range but it is still more limited than the IDIs. The pre-chamber issue is a big deal to me as well. diesel mekken has built an inline pump that went on to a tdi pulling tractor, he says it pulls to over 10,000 rpm. i used to think the same thing but now i am not so sure. a guy in hungary sent me a video of a buggy with a 1.6tdi built with tdi pistons and head with a 1.5 crank, he buillt the pump for it, he says it revs to 5500.Ok. I'm just relaying what I've read in Bosch books on diesel engine management.
Dropping prechamber has nothing to do with power.
I certainly believe that pre-chambers crack depending on how hot the combustion temps get which depends on how hard they are run. I have had the opportunity to pull apart quite a few higher mileage engines 1.6TDs. The condition of the pre-chamber inserts seems to be directly in line with that belief. Engines installed in vanagons usually have more cracks in the pre-chambers and head at 100,000 miles than the same stock engine in a golf/jetta will have at 300,000 miles. I pulled a head of a 1.6TD vanagon recently that had a documented 70,000 miles. There was fairly severe cracking in all four pre-chambers forming a T across the insert and there were cracks running from the two inner exhaust valves to the pre-chambers. ECOdiesel engines tend to have no cracks in the pre-chambers and little to no cracking between the valves.