Turbo Questions - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 4 (permalink) Old 12-16-2007, 11:30 PM Thread Starter
 
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Turbo Questions

I have a CRD 2.8L Turbo. Question is I found a used Turbo for it on E-bay. How hard is it to make mine a twin turbo?

Also is methanol injection a good option for the little oil burner. How about Propane?

I want more mpg's than TRQ.
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post #2 of 4 (permalink) Old 01-01-2008, 12:54 AM Thread Starter
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Any help?
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post #3 of 4 (permalink) Old 01-01-2008, 05:00 AM
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There is a build it yourself propane artical down in he Dodge projects. After you put a pyrometer on the engine and get a good baseline it will add either power or mileage depending how you drive and feed it.

Fed in small amounts it is a little like a catalyst, in larger amounts it is a fuel because of the way that it is very dificult to burn until the mixture is right so it will compress without burning but the light fractions of the diesel set it off with a real fire. Because of the very high octane it burns steady instead of as a blasting agent. If you add enough to fire on compression the results resemble ether with very high cylinder pressures. A single trip into this zone can break pistons and rings.

Water/menthanol is good for dropping EGT - drags, pulling running up a hill. If the before turbo temps stay above 1050-1100 in your mode of travel it might be a good idea to sprinkle the engine.

Because the working form is different they would probably work togather with only a little interaction.

But agin do not try this at home without a pyrometer, a boost gage would be good, also.

under 3500 ft elevation don't try the twin turbo for mpg. Above 10000 foot that is a possibility.

There is nothing for the little ones and the full size they want around $1k.

To do it yourself look up the gas laws for flow and figure a way to shut it off based on the engine rpm and load. It would not be good to spill a tank of propane around your car.

It is on my list for next year

keydl

93 Dodge /CTD, IC, 518, club cab LE, BHAF, KDP fixed, kelderman air ride
81 Isuzu /C223na, 5spd
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post #4 of 4 (permalink) Old 01-08-2008, 03:40 PM
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Quote:
Originally Posted by dieselmedic
I have a CRD 2.8L Turbo. Question is I found a used Turbo for it on E-bay. How hard is it to make mine a twin turbo?

Also is methanol injection a good option for the little oil burner. How about Propane?

I want more mpg's than TRQ.
Well first before you even jump...

I would get a full set of gauges in the vehicle first thing...Second twin turbos are going to require that you boost up the fuel supply. More boost don't mean more power... Only more fuel...

So if I was aiming for MPG I would look to advance the timing up on the injection pump some... This would help a bunch...

Once you get a pyrometer... The pyro is a excellent gauge to monitor fuel usage... More fuel your dumping in the engine the higher the temps... And of course less few the less heat...

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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