Farmer Rock
just a fella' without a 10mm socket
IDIs make their peak torque at 1400 rpm,and peak hp at 3000 rpm.the cummins make peak torque at around 1600 rpm,and peak hp at 2500.
Rock
Rock
Witch engine will be able to make better torque below 1800 rpm. Witch engine can be lugged more
IDIs make their peak torque at 1400 rpm,and peak hp at 3000 rpm.the cummins make peak torque at around 1600 rpm,and peak hp at 2500.
Rock
Absolutely man.i like the IDI's but im converting my haulers to international DT's
I always wondered why ford didn't put them in their trucks,or at least offer them as an option.But in a way it's good because that means more dt's for us,while other guys fool around with the less powerful 5.9 cummins.I am actually trying to buy a dta360 5 speed bus to make a hauler truck out of.They are great engines,and eventually I would like to get a CCLB truck with a blown motor to swap one in.I could never bring myself to tearing out a good IDI from a truck.DTs are some of the best engines ever made if not the best for medium duty applications.Nothing could take the place of IDIs though.Absolutely man.
I wish these rigs came from Ford with the DT360 to be honest.
Heath
Heres an IDI i ran on the dyno earlier this year, stock pump stock fuel system with just turbo and intercooler upgrades, very broad torque curve with pretty much within 50 tq of peak for 2000 rpms, peal was about 1500 rpms.You must be registered for see images attachYou must be registered for see images attach
Its a factor of the engine design, the cummins has very poor head flow compared to the idi, its meant for high velocity and quick cylinder filling, not overall flow or rpm. Also six in a row tends to be very torquey, and you know DI vs IDI too.
This may have been settled, but the last time I was into the more modern diesels, back in 06/07, there was a huge debate on whether the 12 valve head or the 24 valve head flowed better. 12 big valves vs. 24 little ones. It seemed to be split about 50/50. By driving them empty, the butt dyno said that the 24 valve was as gutless as the 12 valve was stock. I couldn't tell any difference in performance. I was very surprised at this since the 24 valve was so hyped up over the 12 valve.With a low rpm design and a turbo by default, airflow doesn't need to be superbly efficient. There's always the 24-valve head if more is needed...
Plus they don't seen to rev as high either. That can make a big difference depending on how you're driving.The inline six cummins may make more torque, but you wont get nearly as broad of a usable rpm range.
Not in stock form. Over 3500 or so you will float the valves.Plus they don't seen to rev as high either. That can make a big difference depending on how you're driving.
4400 rpms they will start floating, it takes a lot of manifold pressure for the them to start floating at a lower rpm, the stock engine in the shop truck with the compounds would start floating at 2800 with 50-60 psi boost working against the stock springsNot in stock form. Over 3500 or so you will float the valves.
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