ocnorb
IDIT
+1
Just interested in what I can pull at 2300-3000 rpm. An IDI that had to spin over 4000 rpm would be useless to me. I'm more inclined to look at ways to get boost up at low rpms; that is the kind of performance we can use.
ok then, BACK TO THE 1200hp IDI
- Thread starter G.W BUFFALO
- Start date
+1
Just interested in what I can pull at 2300-3000 rpm. An IDI that had to spin over 4000 rpm would be useless to me. I'm more inclined to look at ways to get boost up at low rpms; that is the kind of performance we can use.
Diesel JD
Full Access Member
I just want to say that I really agree with Aric's assessment of the situation regarding air in and air out as the limiting factor we're up against. The true outside the box thinking will be the person who adapts a better turbo, one that can at least hold 20-25 PSI and remain well within it's efficiency range while doing so. A great leap forward would be an "OB special" bolt on turbo kit for those with the time and money to go a bit beyond an ATS, Banks, or Hypermax kit. You still need the Moose, DPS or your individually sourced similar fuel system products but at least you'll use them much more efficiently at that point. Lets just get an IDI to the same power level as a 94-97 PSD that is vaguely stock but has the easy mods (Intake, exhaust, mild tune) like Russ and some of the guys that used to drive IDIs and threw down high 200s and low 300s at the Bowling Green rally. That would be enough for me and most here. I think it can be done with a ground up designed turbo system, a PSD 6637 intake mod, and a DPS or Moose fuel system.... That recipe should easily get 250+HP/550+tq. How long will it hold together...who knows. We need some test mules. For now, my next project is the 6637 intake, if I had studs, I might do the DPS fuel system, but right now that kind of boost might blow the heads off, so until I can afford to build an engine, I'm going to continue to sound like an armchair engine builder.
Dave7.3
Diesel ******
Fear not, for it indeed HAS been tested. You guys can thank Ken for this one:
http://www.dps-performance.com/Ford/idi/idi_pistons_highboost.htm
The IDI can be brought into the range you suggested, but like Agnem said...its the money to get there...
pennsylvaniabo
Full Access Member
maybe it's just me but i dont see how 20 lbs of boost causes pitting....? that looks more like corrosion?
flareside_thun
Reviving The General Tao
hey i don't even need that lol.we can only go around 45mph (sometimes on the larger roads 55) around here.
all i want is 20+ MPG while @ 16k gross going uphill and id be happy.you guys can have all the power lol.
pennsylvaniabo
Full Access Member
I'm with Mel.....I want 3000hp 450 ft lbs.....thats it...
mabc926
Mojo
Oh no it was before the 6.UH OH
I saw that a few hours later and didn't bother to fix my mistake, Guss my brain was just stuck on 6.7's sense that's what we were talking about
Dave7.3
Diesel ******
Can you then explain how corrosion makes better since in a running engine? The pitting from piston wear at high boost makes sense to me...
Could be a combination of things...one thing I can think of could be fuel quality. That engine did have 157k before the high boost experiment began.I saw that a few hours later and didn't bother to fix my mistake, Guss my brain was just stuck on 6.7's sense that's what we were talking about
Its all good, no worries.
flareside_thun
Reviving The General Tao
seawalkersee
It needs a turbo...
I looked at those pistons and have to wonder what all else was done. Did they advance the timing? Did something get sucked down the intake? It seems that most of the "wear" is near the valves or the precup opening. I won't discredit what they say since most of the damage looks like spauling concrete...you know, when you get to close to it with a cutting torch.
SWS
SWS
those of you who remember the Argve and the Enterprise 1, remember seeing a more pronounced cylinder top erosion in the form of a "cone" of severe pitting on the piston face at the top spreading to the bottom. Boost pressures were "normal" ie. not exceeding 15psi, but the ****/water injection quantity was almost measured at the "gallons per mile". We'll never really know what caused his motor failure but a probable cause is excessive water injection. Somewhere in the archives the pics are still around. If someone has them, post them. they are impressive to view and to thank the lord it wasn't your motor.
pennsylvaniabo
Full Access Member
That's all?
OOOPS 300hp 450ft/lbs
Diesel JD
Full Access Member
Well, in the case of the E1 it could have been that the water droplets at that velocity acted like beads of blast material, same thing SWS said regarding the DPS test mule. It is always hard to keep dirt/silicates out of these engines and turbos. Something like that really would have been just like a blast cabinet with high boost and lots of fuel. I'd seen those pistons and they are somewhat reassuring that what I want to do can be done. If I dare try it on a non studded engine with 220K miles.... probably not.
david_lee
Full Access Member
to me, that pitting looks like they were running the EGT's at or very close to the upper end of the threshold far too often. extreme temperatures coupled with the increased boost pressures could very probably have removed the material.
