Tuning a Diesel for Forced Induction

[benno_from_brizvegas]

So how do you adjust the fuelling to suit forced induction?

Is it a DIY sort of job?

It's a 2.4L Hilux motor, BTW.

Cheers,
Benno

[De-lux]

i would like to know this as well. but benno be more specific.

i wanna turbo my 2.8 litre diesel, probably run about 10 to 12 psi boost.

[benno_from_brizvegas]

specific? umm....

didn't really have anything specific at this stage, I'm just thinking about forced induction for the lux and wanted to know a little more!

I know with petrol you have to put a fair bit of work into getting it to work, i.e. rejetting carbs or aftermarket computers etc, but I kinda thought it might be easier for a diesel?

I'm actually thinking about a supercharger at lowish pressures.

cheers,
Benno

[De-lux]

i know in diesels you should have good / new injectors, ungraded fuel pump, and apparently a bigger / better water pump helps too. but thats just hearsay and conjecture (sp?).

is yours a diesel benno?

[phippsy]

mine runs 11 psi and I got it tuned by hiway diesel in Acacia Ridge (?), cost a bit but was worth it over just bolting the turbo on and driving away.

[benno_from_brizvegas]

yup, diesel.

hence the need for a bit more grunt!

benno
EDIT
phippsy do you have any idea how much they'd charge for a tune up only??

and what kind of rpm does the turbo come online at? do you notice the lag?

[My Lil Lux]

I'm running a 2.4 surf turbo in my 2.8 motor, only real thing I had done was injectors as well as turbo, you can do fuel pump etc. just depends how much you want to spend, fuel pump is $$$, not sure what boost I'm running, but does haul ass.

[Dzltec]

yes it does need to be set properly, preferably on a dyno which has air/fuel ratio measurement. Just adding a turbo charger does nothing without adding more fuel. As long as your fuel system is up to scratch it shouldn't be a problem, for max power 18:1 af ratio, any lower than this and high egt's can be found as well as excessive smoke.

Hope this helps

[De-lux]

I'm running a 2.4 surf turbo in my 2.8 motor, only real thing I had done was injectors as well as turbo, you can do fuel pump etc. just depends how much you want to spend, fuel pump is $$$, not sure what boost I'm running, but does haul ass.

bloody oath it does. and gotta love the sound of it too.

[phippsy]

I think the place i got mine done had 3 options for tuning,

1 we can do a little bit to help it, but we prefer not too, was about 500ish
2 we do more and is better but we don't put a fuel anaeroid on so it's still not as good as we can do, was about 14/1500ish
and 3 the ducks nuts was around 2200 with a full pump rebuild and retune, injectors, timing belt and come back in a few weeks and we'll check it over again.

My Lil Lux, we should've had a go at the drag racing at WW2

[eliteforce32]

ur last option at that diesel place wasn't fitting a fuel compensator was it? because the standard 2lte motor has that intergrated into the motor system and u can achieve quite large amounts of boosts from these enginge......user warning tho they don't take much to blow

[ToNkA]

ur last option at that diesel place wasn't fitting a fuel compensator was it? because the standard 2lte motor has that intergrated into the motor system and u can achieve quite large amounts of boosts from these enginge......user warning tho they don't take much to blow

The 2LTE might, but the 2L needs it when adding a turbo.

[phippsy]

yeah, it did include fitting one of those boost compensator thingys

[My Lil Lux]

I think the place i got mine done had 3 options for tuning,

1 we can do a little bit to help it, but we prefer not too, was about 500ish
2 we do more and is better but we don't put a fuel anaeroid on so it's still not as good as we can do, was about 14/1500ish
and 3 the ducks nuts was around 2200 with a full pump rebuild and retune, injectors, timing belt and come back in a few weeks and we'll check it over again.

My Lil Lux, we should've had a go at the drag racing at WW2

I missed all the fun stuff, but maybe next year, after the 308 goes in

[Spartacus]

how bad would a cat D10 truck turbo root up a 2.8

i can guess it wouldnt be too healthy casuse it would take in
sh%tloads of air.

what can be reused of a stock engine to run a trubo?

[eliteforce32]

what do u mean reused?

[Spartacus]

can u reuse the old manifold to plumb into the turbo?
i no u need new air intake n outlet made up.

can u sit a new turbo straight onto a motors exhaust manifold
cause this is what it look like in the manual.

what the basic mod needed to be done

[phippsy]

can u reuse the old manifold to plumb into the turbo?
i no u need new air intake n outlet made up.

can u sit a new turbo straight onto a motors exhaust manifold
cause this is what it look like in the manual.

what the basic mod needed to be done

The cast intake manifold is used, but on mine it came with a new exhaust manifold to sit the turbo in the right spot, otherwise if it hung off the end of the factory exhaust manifold, it would have been down near the chassis rail on that side

edit: if ya want I can get a couple of pics of the turbo setup in mine and e-mail them to you.

[mule75]

you need to weld a bung for a pyrometer in your exhaust just after turbo. chuck it on a dyno and load it up. wind in injection pump till exhaust temp is near to 500 degrees and your done. or alt srew your pump up and find a big hill and get a mate to follow you up and if he says its smoky when you're mid rev range back it off a bit till it doesn't blow smoke. thats what we do anyway, others might disagree but our trucks go grouse and we've never had any problems.