Outer Limits 4x4 Board

just wondering can a manual boost controler be used in my mates S40 landcruzier turbo diesel

its a blowthrough setup thats been worked a little



just a thought (i dunno much about diesel setups)

boost controler is a boost controler. petrol or diesel doesn't matter. What do you mean by blow through set up ?

devo wrote:boost controler is a boost controler. petrol or diesel doesn't matter. What do you mean by blow through set up ?

That's a good question. I guess he means it's NOT draw-through - there isn't a carburettor upstream of the turbo.

But there's not one downstream, either, so it's not what I would call a blow-through.

I guess he means the manfiold pressure is detected at a point which DOESN'T have air/fuel mixture, so there's no problem with bleeding manifold pressure to atmosphere?

So I'd say he's confident with petrol turbo systems, but (as he says) he's not so confident with diesel turbos.

And I agree - I can't see a problem running a boost controller.

i run one:)
you should also be able to crank the fuel a lil too one you boost it

I thought all modern diesels used injection... direct or indirect, not a carburettor setup

Learn something new each day

Since when do diesles have carbys...

Zookified wrote:Since when do diesles have carbys...

-Scott- wrote:there isn't a carburettor upstream of the turbo.

But there's not one downstream, either.

-Scott- wrote:

Zookified wrote:Since when do diesles have carbys...

-Scott- wrote:there isn't a carburettor upstream of the turbo.

But there's not one downstream, either.

Ah I get your comment now Scott....

What does he mean by blowthrough then?? The air blows through the manifold?

Doesn't exhaust go through the mainfold??

HotFourOk wrote: What does he mean by blowthrough then?? The air blows through the manifold?

I don't know for sure, but I guess he's got a reasonable knowledge of "old school" carby turbo systems. The two basic configurations refer to the relationship of turbine to carburettor. The turbine either "draws through" the carburettor or "blows through" the carburettor. The difference has implications for issues such as turbine shaft seals, carburettor sealing, intercooling and blow-off valves. In the context of this discussion, the high pressure side of a draw through system contains air-fuel mixture - so a manual boost controller which relies on bleeding manifold pressure would be bleeding air-fuel mixture.

Since the introduction of EFI, petrol engines are essentially "blow through". I cannot imagine a turbo-diesel configuration which isn't essentially "blow through."

So that's my explanation. Now we wait for somebody to blow it out of the water.

Ah ok, so it is just referring to where the turbine is located with reference to the position at which fuel is introduced to the air.
This bit didnt have me confused, just the carby on a diesel part (due to me associating a carby with a typical 'blowthrough' system.

Mulisha wrote:Doesn't exhaust go through the mainfold??

There are intake manifolds and exhaust manifolds. Intake manifold is used for the air and fuel fluids before introduction into the cylinder (through intake valves), exhaust manifold deals with exhaust fluids after they leave the combustion chamber (through exhaust valves).
I was referring to an intake manifold.

mab they are set up like the sd33's with a butterfly on the intake aswell. and he has interpreted it as blowthru because of this?

either way as far as i know every deisel is essentially the same and the deisel is injected in some form.