Thread: The new tourer...

Originally Posted by isuzurover

I also have a 2560R. The wastegate was previously set at 10psi, could hit 750oC egt on the highway at ~120 into a headwind. I recently wired the wastegate shut - now get 20psi and can't get above high 600's with a tandem kayak on the roof doing 130 up a hill. Don't have an intercooler yet, but hopefully coming soon.


Heading to Brisbane tomorrow - Pete - we will have to meet up on a dirt road somewhere and have a race Would be interesting to compare how yours goes.

Sounds good Ben pm sent with my contact no.

While looking at a old airesearch turbo the other day I noticed that rather than having one inlet port going into the exhaust turbine housing it has 2 holes right beside each other with an unusually large exhaust housing in comparison to its compressor housing what would be the benefits of these things ?

Originally Posted by c.h.i.e.f

While looking at a old airesearch turbo the other day I noticed that rather than having one inlet port going into the exhaust turbine housing it has 2 holes right beside each other with an unusually large exhaust housing in comparison to its compressor housing what would be the benefits of these things ?

Split exhaust housings are usually used on 6 cylinder engines, they split 3 cylinders exhaust into each port and keep the seperate for as long as possible. It gives faster spoolup but it only really works on 6 cyls.

Petrol turbos usually have bigger exhaust housings than the same turbo used on a diesel. This is because petrol exhaust is hotter and they are usually set for more top-end power where diesels are set for the best midrange.

Thanks dougal I hav a rough idea about the housing sizes and I was asuming it would be for a higher reving engine but that is interesting about the twin ports makes sense now that you say that but why I thought it might be useful was 1 it was of a very heavy duty build even the compressor and turbine blades (the compressor blades were also straight which also aids in a higher output pressure turbo but takes longer to spool up compared to a twisted bladed turbo ? ) I was thinking along the lines of using it as the large turbo in a compound setup but probably not to good seeing as it has the twin exhaust ports ?

If you think it's the right turbo, I wouldn't let a split pulse housing stop you from using it. They'll work fine with a single entry as long as the gas flow is nice and smooth.

Ill let you know the details of the turbo when I get them

In your opinion what would be the best 2 turbos to use in a compound arraignment be ?

Originally Posted by c.h.i.e.f

In your opinion what would be the best 2 turbos to use in a compound arraignment be ?

Depends entirely on your goals.
The small turbo needs to be able to handle life as a single turbo on your engine but also have a shaft strong enough to handle pumping denser air than normal. The large turbo needs to be able to handle the total airflow you need.

The biggest problem you will have is space. There isn't much in a landrover engine bay with a 4BD1, two turbos and an air-cleaner large enough to feed them.