Hi guys Been pondering a bit over differing advice read on this forum as to timing adjustments for diesel engines.

So for Biodiesel to advance or retard and how much??

and SVO in a two tank setup adv or retard and how much??

The reason for the changes to timing are supposed to be for allowing the fuel to burn more efficiantly etc etc??

I plan on experimenting myself on the inline pump merc with timing and fuel delivery rates.

Im after All advice/discussion/ideas welcome.
what have others tried? run now? and have heard?

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Cheers
Nick.

Roidio 2001 Holden Rodeo 4x4 2.8L TD. 2.5" Straight through exhaust sytem, heat exchanger shower system. 2" Body Lift,
And lots of fruit, B100 for 25,000 no problems.

Elsa 1983 Mercedes-Benz W123 300D. The Fastest Merc in Oz, Loving B100 Burgers

Good question Nick.
Will be interesting to read your results.
My son's hilux is now converted, 500km so far on veg.
It goes on the chassis dyno on Thursday (I hope) for IP timing to suit veg.
I will report if it is retarded or advanced and how much, also HP at rear wheels on diesel and on veg.

perhaps i sould just wait for your results paul cos they will be accurate mine will just be seat of pants stuff. Is a diesel speciallist doing the dyno tune? Have they any idea or where to start with veg or are they all just experimenting too? Are you gonna get them to fuel the Surf up too? come-on fuels free might as well get the car to go like a petrol one. And out of interest how much to they slug ya for a dyno session and tune?
Cheers Nick.

__________________
Cheers
Nick.

Roidio 2001 Holden Rodeo 4x4 2.8L TD. 2.5" Straight through exhaust sytem, heat exchanger shower system. 2" Body Lift,
And lots of fruit, B100 for 25,000 no problems.

Elsa 1983 Mercedes-Benz W123 300D. The Fastest Merc in Oz, Loving B100 Burgers

On another tread it advises to ADVANCE for veg.

The reasoning is that veg takes a little longer than dino to get burning, so ya squirt it in a bit sooner.
How much to advance now that is the $64 question.

Do you mean the post by High Compression II? thats what i read and it goes agaist other advice i've read elsewere by others on this forum. The logic sounds ok but i does fly in the face of other people advice. strange hey.

__________________
Cheers
Nick.

Roidio 2001 Holden Rodeo 4x4 2.8L TD. 2.5" Straight through exhaust sytem, heat exchanger shower system. 2" Body Lift,
And lots of fruit, B100 for 25,000 no problems.

Elsa 1983 Mercedes-Benz W123 300D. The Fastest Merc in Oz, Loving B100 Burgers

yes Nick that was the post I saw.

I guess the only real way is on a dyno. It would depend how accurate your timing already is. Then veg being a bit thicker may well make the timing advance sooner anyway.

Too many variables. Only real solution is testing.

Biodiesel is thicker than diesel to a degree. If changes to be made, what will be the effect on the use of dino diesel?

SVO or WVO is also thicker than diesel and biodiesel. If changes to be made. Should it be adjusted to work with both fuels in two tanks system?


thoughts

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Fitian
<><

IMO
I think that finding a happy medium is the key for a two tank with a bias towards the WVO as most of the time its running that.

Biodiesel in my case i would tune it just for that. If biodiesel runs so well in a engine meant for Diesel then i'm sure that diesel will run well in a engine setup for biodiesel.

__________________
Cheers
Nick.

Roidio 2001 Holden Rodeo 4x4 2.8L TD. 2.5" Straight through exhaust sytem, heat exchanger shower system. 2" Body Lift,
And lots of fruit, B100 for 25,000 no problems.

Elsa 1983 Mercedes-Benz W123 300D. The Fastest Merc in Oz, Loving B100 Burgers

I think we are only tinkering at the edges and Nick is right. Maybe we might get 1 or 2 horsepower difference by optimising pump timing for a particular fuel. Lets say we ger 50 hp from engine 'A' when timing is optimised for petrodiesel and running on that. It might get say 48 hp on Bio for the same setting and may get 50 on Bio after timing optimised for Bio and then drop to 48 on petrodiesel on those settings. That's the sort of differences I am expecting and it makes sense to me to optimise for the fuel most used in each application and live with the probably imperceptible loss on the other fuel.
I will be optimising both of my 2 tank vehicles for veg and am sure they will run just fine on Bio or petrodiesel at those settings.
If I was running Bio most of the time I would optimise for that, being confident that it would run just fine on petrodiesel.

bump

__________________
Cheers
Nick.

Roidio 2001 Holden Rodeo 4x4 2.8L TD. 2.5" Straight through exhaust sytem, heat exchanger shower system. 2" Body Lift,
And lots of fruit, B100 for 25,000 no problems.

Elsa 1983 Mercedes-Benz W123 300D. The Fastest Merc in Oz, Loving B100 Burgers