OT: Turbo Diesel
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From: Pacific Northwest, USA
OT: Turbo Diesel
I've been surfing the diesel (and gas) truck sites for a while now since I'm trying to figure out the best tow rig/commuter, and came across these videos. Thought they were worth posting just for the sheer entertainment value.
http://www.bandagbullet.com/ba...1.mpg
http://www.bandagbullet.com/ba...2.mpg
http://www.bandagbullet.com/ba...1.mpg
http://www.bandagbullet.com/ba...2.mpg
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From: Knoxville, TN
Here is another truck that a local guy here designed the cams on, and setup the TT setup.
Truck weighed in at 7000lbs before he ran it.
http://www.ls1won.com/stuff/cummins.mpeg
Truck weighed in at 7000lbs before he ran it.
http://www.ls1won.com/stuff/cummins.mpeg
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From: Elkton, MD, 21921
Re: OT: Turbo Diesel (siisgood00)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by siisgood00 »</TD></TR><TR><TD CLASS="quote">What is it about a disel engine that allows for such high boost levels?</TD></TR></TABLE>
preignition (detonation) is not a problem with diesels; in fact, it is the actual compression of the motor which fires the mixture, not a spark. the volatility of the fuel is very low compared to gasoline; due to this, high boost is possible without uncontrollable combustion (detonation). anyway, thats how i understand it....
oh yeah; the above plus the fact that most factory diesel engines, such as the cummins, come oem with monster strong crank, pistons, and rods, so they can take tons of stress/boost.
preignition (detonation) is not a problem with diesels; in fact, it is the actual compression of the motor which fires the mixture, not a spark. the volatility of the fuel is very low compared to gasoline; due to this, high boost is possible without uncontrollable combustion (detonation). anyway, thats how i understand it....
oh yeah; the above plus the fact that most factory diesel engines, such as the cummins, come oem with monster strong crank, pistons, and rods, so they can take tons of stress/boost.
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From: Believeland
Re: OT: Turbo Diesel (Todd Reid)
Actually Todd, the volatility of diesel is very high, which promotes the preignition necessary for CI engines. The metric for diesel volatility is cetane number, kinda like octane is an indicator of how resistant gas is to pre-ignition.
The new Ford Powerstroke 6.0L diesel runs almost 30 psi!
The new Ford Powerstroke 6.0L diesel runs almost 30 psi!
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From: Elkton, MD, 21921
Re: OT: Turbo Diesel (allenp)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by allenp »</TD></TR><TR><TD CLASS="quote">Actually Todd, the volatility of diesel is very high, which promotes the preignition necessary for CI engines. The metric for diesel volatility is cetane number, kinda like octane is an indicator of how resistant gas is to pre-ignition.
The new Ford Powerstroke 6.0L diesel runs almost 30 psi!</TD></TR></TABLE>
hi allen.
i beg to differ about the volatility of diesel fuel; please check the following link (it claims that diesel has low volatility):
http://www.bankspower.com/tech_aboutdieselfuel.cfm
good all around discussion about diesel power.
todd
ps i am by no means any kind of "expert" or even "informed person" on diesel!
The new Ford Powerstroke 6.0L diesel runs almost 30 psi!</TD></TR></TABLE>
hi allen.
i beg to differ about the volatility of diesel fuel; please check the following link (it claims that diesel has low volatility):
http://www.bankspower.com/tech_aboutdieselfuel.cfm
good all around discussion about diesel power.
todd
ps i am by no means any kind of "expert" or even "informed person" on diesel!
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From: Believeland
Re: OT: Turbo Diesel (Todd Reid)
You're right, Todd, I was taking "volatility" out of context! My bad.
When I was referring to volatility, which I believe is a compound's tendency to vaporize (am I correct?) I meant the pre-ignition quality of the fuel. Which is indicated by cetane number.
When I was referring to volatility, which I believe is a compound's tendency to vaporize (am I correct?) I meant the pre-ignition quality of the fuel. Which is indicated by cetane number.
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From: Haymarket, VA, USA
Re: OT: Turbo Diesel (johng)
cool picture indeed, but I believe it is somewhat misleading.
at first glance, I'd say "wow, the Cummins sure has a big unit!" but then again, it is achieving 5.9L of displacement with only 6 cylinders (call it 1000cc per cylinder) - so the pistons are going to be a bit larger than the chevy, or the ford - hence the bigger rods.
And then the ford powerstroke is 7.3 liters (up until this year anyway, roughly 900cc per cylinder), which would explain why they are larger than the chevy which is "only" 6.2 Liters (roughly 800cc per cylinder).
Having said that, I've got to admit that that Cummins rod sure is big, even for a 1000cc cylinder.
What was that Scott (RR98ITR) said: I like have a relatively big unit... That's what Cummins said, eh?
at first glance, I'd say "wow, the Cummins sure has a big unit!" but then again, it is achieving 5.9L of displacement with only 6 cylinders (call it 1000cc per cylinder) - so the pistons are going to be a bit larger than the chevy, or the ford - hence the bigger rods.
And then the ford powerstroke is 7.3 liters (up until this year anyway, roughly 900cc per cylinder), which would explain why they are larger than the chevy which is "only" 6.2 Liters (roughly 800cc per cylinder).
Having said that, I've got to admit that that Cummins rod sure is big, even for a 1000cc cylinder.
What was that Scott (RR98ITR) said: I like have a relatively big unit... That's what Cummins said, eh?
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From: Lake Orion, MI, 48362
Re: OT: Turbo Diesel (SJR)
Well, also keep in mind that the Cummins ISB motor is used in medium duty truck, with factory outputs upwards of 800ft-lbs. Its tuned down to match the input capacity of the dodge transmissions.
My buddy in my Jeep club is running 35 lbs of boost on his 99 ram. He has had the automatic transmission rebuilt twice, once the case itself cracked. Now, he has a stronger case, heavy duty cooling, and a $1400 torque converter. That thing shifts liek a ton of bricks hitting, but its holding together, pulling a 12,000 lb fifth wheel.
My buddy in my Jeep club is running 35 lbs of boost on his 99 ram. He has had the automatic transmission rebuilt twice, once the case itself cracked. Now, he has a stronger case, heavy duty cooling, and a $1400 torque converter. That thing shifts liek a ton of bricks hitting, but its holding together, pulling a 12,000 lb fifth wheel.
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From: Shiny side up dammit, MO
Re: OT: Turbo Diesel (johng)
Hypermax pumps the 7.3 powerstrokes up to 30psi and more!
They use a F-250 with one of their engines in it to tow their Trans-Am rig around.
their rolling test-bed (Excursion) is on it's 4th transmission. Funny thing is everytime it breaks, all the power-bits seem to 'disappear' and the truck goes to ford. now they too are running a reinforced case with a heavier-duty stall and other strengthening parts....it's still together, for now anyways
They use a F-250 with one of their engines in it to tow their Trans-Am rig around.
their rolling test-bed (Excursion) is on it's 4th transmission. Funny thing is everytime it breaks, all the power-bits seem to 'disappear' and the truck goes to ford. now they too are running a reinforced case with a heavier-duty stall and other strengthening parts....it's still together, for now anyways
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From: NC, USA
Re: OT: Turbo Diesel
Cummins owz all other TD.......
Stock Cummings 5.9 (only mods were: chip, exhaust manifold, 4 inch turbo-back piping)
40psi...BTW
Stock 7.3 Power Stroke (only mods were: chip, 4 inch turbo-back piping)
Modified by B18CXr at 3:37 PM 9/5/2003
Stock Cummings 5.9 (only mods were: chip, exhaust manifold, 4 inch turbo-back piping)
40psi...BTW
Stock 7.3 Power Stroke (only mods were: chip, 4 inch turbo-back piping)
Modified by B18CXr at 3:37 PM 9/5/2003
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From: Okie in training, usa
Re: OT: Turbo Diesel (Todd Reid)
Talk about crazy... those diesel tractors in tractor pulls are actually running above 100 psi of boost. I swear, my little T25 could get sucked right through the inlet of one of those things and never even touch the side! 
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From: Knoxville, TN
Re: OT: Turbo Diesel (fsp31)
Yeah, diesels are pretty hard to blow up, you'd end up blowing the heads off one before you destroyed the bottom end of one.
There is a local guy here who is building a CRAZY diesel truck. (He designed the cams and Twin Turbo setup, and a few other misc things in the vid i posted). His plans are to run methanol, rev to 8000rpms, and launch w/ 100psi of boost. His truck was running ~106psi on his TT setup, but he has since turned it down to 80psi, its rather scary watching it go, it soudns like a jet engine when it spools up.
There is a local guy here who is building a CRAZY diesel truck. (He designed the cams and Twin Turbo setup, and a few other misc things in the vid i posted). His plans are to run methanol, rev to 8000rpms, and launch w/ 100psi of boost. His truck was running ~106psi on his TT setup, but he has since turned it down to 80psi, its rather scary watching it go, it soudns like a jet engine when it spools up.
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From: Northern, CA, USA
Re: OT: Turbo Diesel (B18CXr)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18CXr »</TD></TR><TR><TD CLASS="quote">Cummins owz all other TD.......
</TD></TR></TABLE>
While I agree that it is easier to make more power with a Cummins, I am not sure that your dyno plots are a fair comparison. Saying that that the Cummins is better than the PSD because of those two dyno runs is misleading. Just because it is 'chipped', it doesn't mean they have been tuned to the same level. Was that a single page chip or a four page chip? There are some companies that do better jobs than others. The same companies often offer different levels of power as well. For example, my Super Chips Micro Tuner has three tunes built in 70hp/90hp/110hp. The Micro Tuner is just one of the options that Super Chips offers. BTW, judging from the dyno runs, the Cummins has a pretty extreme chip while the PSD has a pretty mild one.
PS I know that the Micro Tuner doesn't make extreme power. It does make power in a way that allows me to tow without having to back out of the throttle.
</TD></TR></TABLE>
While I agree that it is easier to make more power with a Cummins, I am not sure that your dyno plots are a fair comparison. Saying that that the Cummins is better than the PSD because of those two dyno runs is misleading. Just because it is 'chipped', it doesn't mean they have been tuned to the same level. Was that a single page chip or a four page chip? There are some companies that do better jobs than others. The same companies often offer different levels of power as well. For example, my Super Chips Micro Tuner has three tunes built in 70hp/90hp/110hp. The Micro Tuner is just one of the options that Super Chips offers. BTW, judging from the dyno runs, the Cummins has a pretty extreme chip while the PSD has a pretty mild one.
PS I know that the Micro Tuner doesn't make extreme power. It does make power in a way that allows me to tow without having to back out of the throttle.
