Gas vs diesel ..again

tjkj2002 · **Posted:** Sat Aug 14, 2010 10:07 pm

KJ 119 wrote:

tjkj2002 wrote:

CRD Joe wrote:

Now that Audi has won the 24 hours of LeMans with diesel short of top fuel funny cars there is NO automotive application that diesel isnt superior to gas!!!

There are many.

<Reeks of Diesel Envy>

:goink:

No envy,just stated that there are many automotive racing venues that diesels are not present or better.

tjkj2002 · **Posted:** Sat Aug 14, 2010 10:10 pm

CRDMiller wrote:

Gassers are typically more simple and require less knowledge to work on, but that is changing, soon, brain dead part swappers will be able to complete even the most challenging jobs, such as refilling the UREA tank, (oops was that dexcool?), or cleaning the wiper blades, on a modern, diesel engine.

20 years ago maybe but not today,gassers are far more complex then you could imagine when you add stuff like VVT and such.

KJ 119 · **Posted:** Sat Aug 14, 2010 10:23 pm

Disappearing post ay....Someone get their panty's in a wad?

:POPCORN:

SLS · **Posted:** Sun Aug 15, 2010 11:49 am

When I had my CRD in for service the dealer gave me a 3.7L loner. I thought it accelerated quicker at a light with normal driving. But I had to go to the pump for gas much sooner than expected. I was glad to get my CRD back. I regularly get 34MPG on the interstate. When I average 65 to 70 mph it gets better MPG at higher speeds, at times I get even better MPG depending on the fuel I'm using. :mrgreen:

WelshCherokeeCRD · **Joined:** Wed Apr 21, 2010 6:57 am **Posts:** 68

tjkj2002 wrote:

CRD Joe wrote:

Now that Audi has won the 24 hours of LeMans with diesel short of top fuel funny cars there is NO automotive application that diesel isnt superior to gas!!!

There are many.

Technically wouldn't those nitro drag racing cars you race over there be diesels?

I seem to remember seeing something on the tele or web or something about how about a fourth of the way down the track they're firing on compression only simply because their spark plugs burn out rapidly because of cylinder pressures.

Also my flatmate's got a remote control car that runs on the same fuel and it uses a glow plug for startup and runs on compression the rest of the time.

tjkj2002 · **Posted:** Wed Aug 18, 2010 8:20 pm

WelshCherokeeCRD wrote:

tjkj2002 wrote:

CRD Joe wrote:

Now that Audi has won the 24 hours of LeMans with diesel short of top fuel funny cars there is NO automotive application that diesel isnt superior to gas!!!

There are many.

Technically wouldn't those nitro drag racing cars you race over there be diesels?

I seem to remember seeing something on the tele or web or something about how about a fourth of the way down the track they're firing on compression only simply because their spark plugs burn out rapidly because of cylinder pressures.

Also my flatmate's got a remote control car that runs on the same fuel and it uses a glow plug for startup and runs on compression the rest of the time.

Top fuel and top alcohol use methenol and Nitro Methane.When you see pure fuel coming out that pipe is when both spark plugs have burnt out which is actually pretty rare nowdays.They push 11 gallons of fuel in a 4 second run,there on the verge of hydrolock and the engine actually only spins about 680 rotations in that 1/4 mile,which as of a year ago is now only a 1000'.

I have 4 Nitro RC cars,yes they use a glow plug but are also 2 strokes and spin upwards of 40,000 rpm's so a spark plug is out anyways and the glow plugs are a bit different from what a diesel uses as the filiment stays glowing red as it is more like a light bulb filiment and directly exposed to the combustion chamber.Most of those run on methonal with a range from 10%-30% nitro content.

ac5501 · **Posted:** Wed Aug 18, 2010 10:00 pm

eyehatetofu wrote:

I have no problems with diesels. I think they are pretty cool. I would love the mpg's and torque of the RD, BUT I have poked my nose over here a few times and it seems like there are A LOT of things that need to be done to the CRD engine to get it to perform. I believe that was what the original debate was about 3.7L vs CRD. I'm not a fanboy of either engine and didn't even know about the CRD until after I bought my KJ. It would be cool to hear if any of the US CRD guys bought their Libby's did nothing to the engine and have had no problems.

I have read a few posts on the internet from folks that have had no issues and only do scheduled maintenance. I have talked to 2 different people myself personally one had no issues at all, and one had the egr replaced under warranty. Neither of them ever heard of this website.

Technically you do not have to put anything into a CRD to get it to perform. I got mine with 23k on it and up until the GDE tune at 70k I was just about stock. I'm now at 106k. The dealer replaced a glow plug, and the turbo and CAC hoses under warranty. I drive it over 100 miles per day and in 2.5 years its never stranded me (knock on wood and hope my timing belt holds out another 800 miles), and I believe i've only been without it for about 3 days.

I never did any of the MODS for the EGR (ORM SEGR) though I probably should have. If there is any one thing that should be done, some sort of MOD/tune for this would be it.

I'm not thrilled with the choice fuel filter assembly or the decision not to include a lift pump. I fortunately have had no issues at all there, but keep a close eye for problems.

I highly recommend the GDE tune its pricey, but it really makes the Jeep drive much better, takes care of the EGR, plus the mpg gain.

OldSkull · **Posted:** Thu Aug 19, 2010 12:17 am

Got big issue with mine (Transmission) and a overheating problem, they need great care and mods to correct Chrysler "adaptation" to stupid anti Diesel policy of those dumb stupid collecting taxes from us...Just remember the EV1....Remember the Tucker.... So much power in the hands of a small group of mens and they control your needs...

I get a CRD because I need a powerfull small economical tow truck with plenty of torque, I never consider 3.7 gaser in any Jeep plateform, only the MB 3.0 L diesel or the 5.7 Hemi can do the same job like my CRD. Sooner or later someone will produce a good half ton pickup with a small 6 cylinder diesel in it (AKA 3 to 4.5L) until this day diesel will alway's play the second violin in american mind...

WelshCherokeeCRD · **Joined:** Wed Apr 21, 2010 6:57 am **Posts:** 68

tjkj2002 wrote:

WelshCherokeeCRD wrote:

tjkj2002 wrote:

There are many.

Technically wouldn't those nitro drag racing cars you race over there be diesels?

I seem to remember seeing something on the tele or web or something about how about a fourth of the way down the track they're firing on compression only simply because their spark plugs burn out rapidly because of cylinder pressures.

Also my flatmate's got a remote control car that runs on the same fuel and it uses a glow plug for startup and runs on compression the rest of the time.

Top fuel and top alcohol use methenol and Nitro Methane.When you see pure fuel coming out that pipe is when both spark plugs have burnt out which is actually pretty rare nowdays.They push 11 gallons of fuel in a 4 second run,there on the verge of hydrolock and the engine actually only spins about 680 rotations in that 1/4 mile,which as of a year ago is now only a 1000'.

I have 4 Nitro RC cars,yes they use a glow plug but are also 2 strokes and spin upwards of 40,000 rpm's so a spark plug is out anyways and the glow plugs are a bit different from what a diesel uses as the filiment stays glowing red as it is more like a light bulb filiment and directly exposed to the combustion chamber.Most of those run on methonal with a range from 10%-30% nitro content.

Wait
You said when BOTH plugs burn out.
Does that mean two plugs per cylinder?
WOW!

I've watched those things on youtube and the power they make is just absolutely brutal. It looks like the engine in the rear is actually twisting the front of the chassis on a car that's like 15 metres long!

Why do they call it a quarter mile if it's only 1,000 feet? I thought there were 5,280 feet in a mile?

Anyway thanks for the education on how the rc cars run; my flatmate's a bit of a boner when it comes to mechanical things, and you can tell the thing is running like hell. It spits raw fuel out of the exhaust and bogs when he grabs full throttle. It's some HPI truck thing. Would probably be a pretty bollocks truck if he hadn't boogered the doo doo out of it and knew a thing or two about how things are supposed to work.

But that brings me to my next question; I was under the impression that diesel was simply a cycle, and the diesel fuel that's sold could be substituted for almost any manner of flammable liquid like kerosene? I honestly don't know much about it since I've always been a petrolhead (a Cossie Escort and Sierras mostly over the years) and never really bothered to try to learn much about diesel until I got this car. I still mostly drive the Mondeo even though it's boring rubbish because of the fuel economy, the Jeep is kind of my off road car and trailer towing for my idiot acquaintances that have rubbish cars they buy and polish up and resell.

Anyway, from what I've read on the site you seem to be pretty knowledgeable in such matters, so do you have anything to add so I don't make myself look further a fool when it comes to this turbocharged diesel wizardry?

tjkj2002 · **Posted:** Fri Aug 20, 2010 6:36 am

WelshCherokeeCRD wrote:

Wait
You said when BOTH plugs burn out.
Does that mean two plugs per cylinder?
WOW!

I've watched those things on youtube and the power they make is just absolutely brutal. It looks like the engine in the rear is actually twisting the front of the chassis on a car that's like 15 metres long!

Why do they call it a quarter mile if it's only 1,000 feet? I thought there were 5,280 feet in a mile?

Anyway thanks for the education on how the rc cars run; my flatmate's a bit of a boner when it comes to mechanical things, and you can tell the thing is running like hell. It spits raw fuel out of the exhaust and bogs when he grabs full throttle. It's some HPI truck thing. Would probably be a pretty bollocks truck if he hadn't boogered the doo doo out of it and knew a thing or two about how things are supposed to work.

But that brings me to my next question; I was under the impression that diesel was simply a cycle, and the diesel fuel that's sold could be substituted for almost any manner of flammable liquid like kerosene? I honestly don't know much about it since I've always been a petrolhead (a Cossie Escort and Sierras mostly over the years) and never really bothered to try to learn much about diesel until I got this car. I still mostly drive the Mondeo even though it's boring rubbish because of the fuel economy, the Jeep is kind of my off road car and trailer towing for my idiot acquaintances that have rubbish cars they buy and polish up and resell.

Anyway, from what I've read on the site you seem to be pretty knowledgeable in such matters, so do you have anything to add so I don't make myself look further a fool when it comes to this turbocharged diesel wizardry?

Yeah Top Fuel cars use 2 plugs per cylinder,there 500 cu in HEMI's,and also use 2 magneto distributers also(no battery needed).After Scott Kalitta was killed on the track they shortened the 1/4 mile for Top Fuel to 1000' so they have a longer shut down area for safety.

As for the RC Nitro cars they are 2 strokes with no dedicated oil system,so just like a 2 stroke chain saw or weed eater the oil is mixed with the fuel and that is what is seen as "fuel" spitting out of the exhaust.

Gas vs diesel ..again

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