Hi or low mount turbo?

[Deano2506]

G'day all.
Hoping for some advice on what the advantages/disadvantages are
Of a high versus low mount turbos on a td 42

[gubigfish]

I went for a high mount setup on my GQ partly because it was easier to work on, however if you want a top mount intercooler you might have issues running a high mount

[Deano2506]

Thanks for that.
Makes sense too.
I plan on running a intercooler after i get the turbo done,so that's very helpfull info

[mudski]

Engine bay temps would be lower using a low mount setup. Further from the aux battery too if you have one. Easier intake plumbing maybe with a high mount though.

[Deano2506]

Another good point.
I guess the turbo itself would run cooler with low mount too

[mudski]

I think i read somewhere too about the flow dynamics. It was better with the low mount. But I'm not sure if it was about this or not. I run a low mount. If I was given the coice, low mount still. To me it just seems a better position and out of the way too... Doesn't look as good though...

[Deano2506]

Hmmm.flow dynamics...I'll look into that a bit more.
I'm not worried how it looks just what goes better.
Cheers for the info

[gubigfish]

nissannewby is probably the most qualified to talk about this

[mudski]

nissannewby is probably the most qualified to talk about this

Most definitely....

[nissannewby]

nissannewby is probably the most qualified to talk about this

Not sure about that :p

A well designed high mount can be just as good as a low mount. Low mount I would be using a dts item. They are nice heavy cast and are very open and direct compared to a standard manifold.

For high mount I would be using the latest item from radius fab recent testing by a well known shop has shown some nice gains over the standard nissan manifold.

I dont see to much difference in where the heat and everything is. Piping is very similar unless you do run a top mount cooler then a high mount might cause some dramas. Depending on turbo sometimes wastegate actuator placement can be fiddly on a high mount setup.

[Deano2506]

Cheers for the info.
I'm not after heaps of power,just more pull on the hills especially when towing my boat.
I'm from tassie so theirs heaps of long hills.
I plan on putting a top mount intercooler on when the wallet permits
So think the low mount will be the go.
Could i use a factory gu set up but with a dts manifold?
I've already got a 2.75 beaudesert exhaust on her too.
Cheers again!

[gazq]

Hi Deano,

Fellow Tasmanian here. I stuck a dts low mount turbo on my 1988 GQ 4.2 running 11 psi and I found that going up some hills I was able to hold a higher gear in many instances. Also running a 2.75 exhaust. The ability to maintain speed even with a camper trailer attached was much easier after the turbo. I originally put it on before we did the Simpson desert. My reasons for going low have been covered by the previous replies. Away from Aux battery and other accessories, space for a top mount inter-cooler one day.

Cheers,

-GazQ

[Deano2506]

Hi gaz.
Sounds like you've got exactly what I'm planning on putting on.
And you got the results I'm hoping for too.
Keep warm mate,winters pretty much here.