Anyone with an mTDI that really works?

[Typrus]

I know!!
Its just that the Tercel4wd tranny- for a pic attached to the venerable 4AGE, and a random guy with odd hair (it isn't mine) look here- is odd and is hard to adapt. Not to mention a roughly 100ft/lb torque limitation.

http://picasaweb.google.com/synthdesign/85TercelSR54WDSilverBullet#5276436102252570754


Notice the big white circle just under the oilpan. Thats the front CV hole. Lol. All-time front wheel, selectable true four wheel.

[jackbombay]

I was referring to PZEVs (Partial Zero Emissions Vehicles), which I have heard, when run in LA, have emissions cleaner than the air that went into the engine.

Where in LA?

  The LA basin as a whole, the air might be a touch worse by the ports, but air is pretty homogenized so exact location doesn't make a huge difference.

If it's by the port then my diesel bunny probably emits fewer pollutants than are in the air.

    I've been around plenty of old IDIs, I'm sure if you locked yourself in a garage with a running IDI you'd die within 24 hours at most, you'd probably be dead in a few hours is my guess. If the air was truly dirtier around the ports than your exhaust how would anybody be able to work a whole 8 hour shift there?

  I found this browsing around, which shows that MPGs are a poor measure of tailpipe emissions,

Diesel trucks spew pollutants as they cruise Interstate 5 and Highway 99. Though cleaner engines and fuel are on the way, manufacturers knowingly produced 1.3 million engines that emit excess pollution to improve gas mileage and performance on the freeway.

  This is interesting as well, I can assure you that the %10 in question are not new computer controlled cars.

Less than 10% of the cars produce most of the automobile pollution.

  Above quotes from here.


  Here is another page about air quality, from the late 80s to the late 90s air quality improved massively in the LA area. Fuel Injection started dominating the new car market in the mid to late 80s, by 97 all new cars came with fuel injection, and there is a massive corresponding drop in pollution. While the air is still certainly crap in the LA area, it is certainly better than it was before cars were computer controlled.

   Are we off topic enough yet? :lol:

[jackbombay]

Here is another page showing significant declines in air pollution as automobile technology has advanced, and those decreases in pollution also happened as the population in that area increased notably, by about %30 actually.

from here
1980    11,497,486       
1990    14,531,529       

  Or maybe I'm totally off base and auto manufacturers are intentionally making cars that are not reliable, so they will break down a lot, so they can then make lots of money repairing them, and it actually has nothing to do with emissions...

[lyeinyoureye]

I was referring to PZEVs (Partial Zero Emissions Vehicles), which I have heard, when run in LA, have emissions cleaner than the air that went into the engine.

Where in LA?

The LA basin as a whole, the air might be a touch worse by the ports, but air is pretty homogenized so exact location doesn't make a huge difference.

Pollution varies greatly according to location, time of day, time of year, events, etc... For instance the top two locations for 1hr CO are only five miles away, yet one has twice as much CO as the other does.

If it's by the port then my diesel bunny probably emits fewer pollutants than are in the air.

I've been around plenty of old IDIs, I'm sure if you locked yourself in a garage with a running IDI you'd die within 24 hours at most, you'd probably be dead in a few hours is my guess. If the air was truly dirtier around the ports than your exhaust how would anybody be able to work a whole 8 hour shift there?

Are you serious? You'll die in a garage w/ a running vehicle for the same reason you'll die if you seal up your house too much w/ any CO source, which has very little to do w/ local air pollution and a lot to do w/ CO poisoning. Even gassers need to light off a cat and are dangerous in enclosed spaces.

The rest I agree with, but heavy duty diesels have little to no emissions requirements, especially ocean based sources, which is why CA is regulating them. It's no coincidence that pollution spikes dramatically the closer one gets to the port.

[jackbombay]

Are you serious? You'll die in a garage w/ a running vehicle for the same reason you'll die if you seal up your house too much w/ any CO source, which has very little to do w/ local air pollution and a lot to do w/ CO poisoning.

  New cars have very low CO emissions, a new car might kill you due to O2 depletion, but from CO poisoning it would take a very long time, probably not ever.

  CARB does not like CO, the smog formation reaction goes like this, CO + 2O2 + sunlight = O3 (ozone, bad) + CO2.

  Hows this, we both lock ourselves in garages with a car running, you with a IDI, me with a brand new PZEV vehicle, first guy to die looses :lol: ;-) I kid I kid!

[lyeinyoureye]

New cars have very low CO emissions, a new car might kill you due to O2 depletion, but from CO poisoning it would take a very long time, probably not ever.

New cars still have to light off the catalytic converter for it to function, and while that rich mixture is being sent through the cat HC and CO emissions spike. In fact most of the pollution from a gasser is during a cold (emissions) start up. Did you read the page I linked?

"When cold engines first start, they run rich," Greiner said. The catalytic converter is cold and not converting deadly carbon monoxide (CO) to carbon dioxide (CO2). Concentrations in the exhaust can be more than 80,000 parts per million. Concentrations so large fill the garage with carbon monoxide in a very short time even with the door open. Once the car is backed out of the garage and the garage door closed, large concentrations of gas still remain trapped in the garage. In a house built with an attached garage, part of the gas then seeps into the house where it remains for hours.

Here's a paper from 2006 that illustrates poor (~35%) CO conversion efficiency at idle, which would definitely translate into a dead vehicle operator in an enclosed garage, albeit at some later time compared to a vehicle built when emissions standards were lower.

the conversion efficiencies are lower for idle conditions, probably due to the low inlet temperature, which can be a problem under traffic conditions where idle is a common situation, for example, at congested arterials and for long period stops at traffic lights or at intersections. This problem is increased in the first seconds of a cold start where the vehicle catalyst has not reach its normal operating conditions and the mixture can be rich[/i]

CARB does not like CO, the smog formation reaction goes like this, CO + 2O2 + sunlight = O3 (ozone, bad) + CO2.

And CARB's done a great job at regulating emissions, but even the newest cleanest engine produces CO, especially during warm up/idle.

Hows this, we both lock ourselves in garages with a car running, you with a IDI, me with a brand new PZEV vehicle, first guy to die looses :lol: ;-) I kid I kid!

You first.  

[jackbombay]

New cars have very low CO emissions, a new car might kill you due to O2 depletion, but from CO poisoning it would take a very long time, probably not ever.

New cars still have to light off the catalytic converter for it to function, and while that rich mixture is being sent through the cat HC and CO emissions spike. In fact most of the pollution from a gasser is during a cold (emissions) start up. Did you read the page I linked?

Pick-up emissions are far dirtier than a cars, especially a new car. But I certainly agree that before a cat lights off the exhaust is dirtier than after it lights off.

Here's a paper from 2006 that illustrates poor (~35%) CO conversion efficiency at idle, which would definitely translate into a dead vehicle operator in an enclosed garage, albeit at some later time compared to a vehicle built when emissions standards were lower.

  So we're in agreement then

[lyeinyoureye]

Here's a paper from 2006 that illustrates poor (~35%) CO conversion efficiency at idle, which would definitely translate into a dead vehicle operator in an enclosed garage, albeit at some later time compared to a vehicle built when emissions standards were lower.

  So we're in agreement then

That you're wrong about a new car not being able to kill someone via CO poisoning? Yup, I agree entirely.

New cars have very low CO emissions, a new car might kill you due to O2 depletion, but from CO poisoning it would take a very long time, probably not ever.

[Giles@PerformanceDiesel]

I've searched and searched and read countless threads but am struggling to find a mTDI solution that REALLY works.

When you dig you uncover little problems and issues with all of them, smoke, starting, lack of power etc

Anybody have a 100% solution yet, if so what is the recipe? or will the mTDI remain a flawed compromise?

Well here you go the 5cyl M-TDI in a eurovan we just finished.
running really well. videos to prove it.
http://www.youtube.com/watch?v=OyhqGmoIUP4

[jtanguay]

don't forget there's no muffler on that thing... one reason it's so loud  :wink:

[regcheeseman]

Quite happy to believe that it can be done and with your rep - have no reason to doubt it. But as for us mere mortals?

however the only thing that video proves is that it starts, clacks like a Lada, and then drives away .......... very slowly ;-)

I appreciate your help and believe me this is a reciprocal arrangement, as I normally point people to yourself with performance pump requirements - however the shipping is prohibitive.

I think I will stay IDI for the next engine build and then maybe supply of donor motors will force me to go PD or TDI in the future.

[blackdogvan]

How can you have access to this site & not believe m-tdi engines both exist and can be easily made to run well???

[Baxter]

I've searched and searched and read countless threads but am struggling to find a mTDI solution that REALLY works.

When you dig you uncover little problems and issues with all of them, smoke, starting, lack of power etc

Anybody have a 100% solution yet, if so what is the recipe? or will the mTDI remain a flawed compromise?

Well here you go the 5cyl M-TDI in a eurovan we just finished.
running really well. videos to prove it.
http://www.youtube.com/watch?v=OyhqGmoIUP4

Cor, that's really weird!
I fix T4's with 2.5TDI's in all the time, that is weird, first it being left hand drive threw me, wheres the pollen filter!
 :lol:
then the engine is just, weird as opposed what I'm used to!
wow, weird.

(did I say weird enough to get the message accross!)

I've only got the 88hp version, but even that flies, sounds lovely and I kick the *** out of it daily and I can't get worse than 27mpg.
T4 2.5 TDI's are brilliant, it's a shame you lot didn't get real ones!

[jimfoo]

Ok, it's been cold here. I forgot to plug the car in this morning, and it was 4* this morning. That's *F, not wimpy *C. I still have 15W40, and although it turned over slow, it started just fine, so I don't see where the starting "issues" part of the complaint comes from. Maybe I should also mention that even though I only need a 2 hole gasket, I have a 3 hole in it.

[burn_your_money]

and then drives away .......... very slowly ;-)

Haha, that's because Jay was driving :lol: It actually pulls pretty good. It's a syncro and also weighs somewhere around 6000 lbs, in case that hasn't been mentioned. In real life it's less clacky, I think that's just the camera Giles was using.

Baxter, what gearbox are you normally using? Is it from a syncro?