7.3idi: WVO: IP timing

sieg01

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We were doing the dynamic IP timing on my van.

With Diesel: 8.4 btdc.
the engine fired up nicely - and there was no smoke at no time while driving.
Air filter is good.
Return-line is good.

Today I have a 2-tank system and I am using 2 heat exchanger. One at a second filterhead and another one next to the WVO tank - after the strainer.

Now, since I use WVO-only in one tank, I am facing a hard start at any time, even without WVO in the fuel line.
It starts hard if the engine is cold or if the engine is hot.
When driving with OverDrive at low RPMs at an uphill (w/o pulling and van empty), then the van gets a fog-machine with WVO.
Furthermore the van stinks like a Weber grill and smokes like it while idling in the yard.

I am now thinking if the IP timing should be changed again.
What is your IP-timing when using WVO?


Is anyone using WMO?
WMO should have a lower viscosity but you should also need a different IP-timing.
What is yours?
 

PossumTruck

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I recently switched to WMO/W85 (more like w/88), and have some haze at idle, but I always have had haze when giving it the ketchup in "gear-lugging" territory on a shift.

From the research I have done, folks advance their timing a bit at a time until they are satisfied (some also say add more RUG to the mix and don't touch timing), but if you want straight WVO, advance a dimes-width at a time and see what happens each time. The fuel is still free and it isn't hurting the van, so a methodical approach is most appropriate, if not the fastest fix.
 

sieg01

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Thanks for sharing :)
What does this mean:
when giving it the ketchup in "gear-lugging" territory on a shift.
Sorry ;)
you want straight WVO, advance a dimes-width at a time and see what happens each time. The fuel is still free and it isn't hurting the van, so a methodical approach is most appropriate, if not the fastest fix.
Yes, I want straight WVO while driving and with Diesel I would like to start and stop the engine.
I started "playing" with the timing. I'll see how it will develop.
 

PossumTruck

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Haha - Putting it in the ketchup is redline, giving it the ketchup is mashing the pedal. Gear lugging territory is when you have low rpm's for the gear, so the engine lugs (not really a problem for automatics, but possible). Full throttle at low RMP in a high gear usually means little acceleration and plenty of unburnt fuel.
 

sieg01

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Haha - Putting it in the ketchup is redline, giving it the ketchup is mashing the pedal. Gear lugging territory is when you have low rpm's for the gear, so the engine lugs (not really a problem for automatics, but possible). Full throttle at low RMP in a high gear usually means little acceleration and plenty of unburnt fuel.
Thanks for your effort, teaching me some more English! :) - next to helping me with the timing issue :)
Can't stop laughing :D

So,
Ft@lRPM = Full throttle at low RMP
This is, when no one wants to be behind my van. :( I am suffering with them when looking in the back mirrors.

I'll continue playing with the timing.
 

Jesus Freak

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Thanks for your effort, teaching me some more English! :) - next to helping me with the timing issue :)
Can't stop laughing :D

So,
Ft@lRPM = Full throttle at low RMP
This is, when no one wants to be behind my van. :( I am suffering with them when looking in the back mirrors.

I'll continue playing with the timing.
I feel ya, I run WMO and when I "lay on the KETCHUP" there's not a mosquito that stands a chance for about 300 sq yards.
 

sieg01

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Hi @ all.

Some day ago I retarded the timing by hand w/o tool.
The van didn't smoke as much anymore, but fuel economy was a foreign word for the engine.

Today I checked the figures and the display said, that it was 4.4° btdc on diesel.

Then I advanced the pump.
With warm/hot engine, I switched on the fast idle relay.
Then with the 19mm key I was turning the IP until I reached 10.4 or 10.5 @ 2000 rpm (cylinder 4 on the van) on diesel.
Then I switched the tank towards straight WVO.
Then I saw that the display showed something like 8.4 or 8.5° btdc.

I didn't switch back to diesel. I just removed the fast idle cable, the tools, tightened the injector line retainers and started a short trip.
And - again - the van "smoked" like Jesus Freak confirmes with "anti Mosquito action".

I was surprised about the timing difference after switching from Diesel to WVO.
But I have more power now. It drives with 100 km/h like earlier with 85 km/h.

Tomorrow, I may take action and retard it again.

Oh, yeah - I didn't plug the fast idle relay anymore. I want to see what happens when starting on diesel this way.

Enjoy!
 

Jesus Freak

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I've read that the alternative fuels mess with the timing. I don't have a timing device yet, but it's coming. That's some pretty cool information. Will your engine crank up from being cold on straight WVO?
 

sieg01

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I've read that the alternative fuels mess with the timing.
Yes, it does.
1 1/2 decades ago, it was easy to go with W/SVO in Germany. (Its also legal today, but now you have to pay energy tax when using it.)
There is a lot of information available, as folks was chatting freely about it.
And they talk about longer glow plugs, timing settings (1- or 2-tank systems) and so on...
I don't have a timing device yet, but it's coming.

Yes, it is good to have. Without it, you don't know what you are doing... You are just guessing and speculating.

That's some pretty cool information.

:)

Will your engine crank up from being cold on straight WVO?

I don't know - yet.
With diesel I have problems starting the engine now - or still.

These days I was only driving with diesel to clean the engine from inside.
Now I have much less smoke while doing the ketchup or Ft @ lRPM.
I was also concerned if my injectors or something else suffered as the engine was not running smooth. But now I know that it was my WVO.

I continue testing...
 

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