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Dougal- I am not sure of your comment No 1, it seems to be confusing to me, isn't the turbine driven by combustion gases pushed and scavenged out, so how dose the intake density of the air effect this.Quote:
Originally Posted by Dougal
I thought the density of the air only plays a part during the combustion phase, producing a better burn ie more power as a result thus you use less throttle which results in less fuel which means less boost but same power.
I went for a test run today and under hard accelaration I had a temp difference off 90 degrees. At high way speeds 105km results before was 24deg I think it was,now it's 40deg difference.
The mass flow through the engine is the same everywhere (if you ignore ring blowby) so the intercooler getting higher density air into the cylinders means that extra air also has to exit through the turbo and exhaust.Quote:
Originally Posted by lambrover
More flow through the turbine should drive it harder.
To get the same power at less boost you have to alter the turbo system to provide less total boost. Either a bigger turbine housing or let the wastegate open earlier.
But that's for boost at max power, at cruising loads you've got a lot of competing factors.
If you keep the same max boost, you're basically setting up the system for more power through intercooling.
Mate do have the type 117 or 118 IC radiator, and do you have any scoop fitted to the bonnet to push air through the IC radiator?Quote:
Originally Posted by lambrover
I have the 117 typehttp://184.72.239.143/mu/7cba5c0d-04c9-6afc.jpg
In the future I will change to a bigger one, like the No100 I think that would be a lot better.
So what your saying dougal is that to get rid of the black smoke without turning boost up (which will give more max power) I need to get a different housing that will flow more air ? At a lower rpm which means I do not have to run as much boost?
Also found that the td5 turbo I hav on there cannot be adjusted to produce any less than 13psi so who knows how much it will go up to :o
So you think the bigger flat surface area would be more efficient? The 100 & 117 are the same size in cubic centermeters so I assume the surface area of the cooling fins woul be similar.Quote:
Originally Posted by lambrover
Do you think the 100 type would fit under the bonnet?
rar110- when you look at my photo you can see that the radiator sits proud, to get clearance above the motor so half out the top and half in-side, I would like a thinner core one so I could fit a thermo on as well. My radiator is mounted directly to the bonnet so lifts out of the way when it's lifted, gives easier access to the rocker cover and manifolds if needed.
I do feel a thinner wider core would be better. My radiator I cut the filler neck of and welded different brackets to the sides, the build quality of the intercooler barrel itself is good but the radiator could be better, it still works fine though.
No.Quote:
Originally Posted by c.h.i.e.f
If you have black smoke you need more boost. Boost doesn't give power, fuel gives power. Boost gives you the ability to burn more fuel.
Set the boost to 15psi if you can and start taking measurements from there. You can use a bike pump and pressure gauge to set the wastegate opening pressures without the engine running.