@Ruan, Couldn't agree more with you - think you're spot on and an excellent observation.
@Poodle: Back in the day doing the midnights (
sssh...another country another time) multiple egt gauges were a must. Not mentioning multiple coolant and air temps, oil pressure and temperature (sump, turbo in/out, cooler) If your car broke, you got nicked 
Every car and engine is different. What you pick depends on so much - have you done the cam? Lowered the compression? Ceramic coatings? How are you fuelling? Exhaust, cooling capacity, etc, etc, etc. Personally, I don't like Garrett. Think they are a cheap mass production disposable product. I'd rather pay more for something decent that can take abuse. But that's me.
It all doesn't matter so much. What really matters (especially with Garretts) is what happens with your engine and analyzing the figures. EGT at exhaust port and downstream from the turbo are vital to keep an eye on. Same for oil temperature. And when they tend to go out of range (hook up the heaviest trailer you can, pick a long hill and wring it's neck to test), you can make adjustments/alterations to bring things back in line.
Not just for the sake of the turbo, but also the engine itself.
And there is also another major advantage - a cooler turbo makes more power - a LOT more.
I try to learn from the professionals
Sorry, I know different make car, but look at the two oil coolers and massive intercooler. Radiator even bigger, takes up full width of the body in the boot
3L 24V TD making 600bhp, now calculating how much can be gotten out of the new project 306 hdi...
@Poodle: Back in the day doing the midnights (
sssh...another country another time) multiple egt gauges were a must. Not mentioning multiple coolant and air temps, oil pressure and temperature (sump, turbo in/out, cooler) If your car broke, you got nicked Every car and engine is different. What you pick depends on so much - have you done the cam? Lowered the compression? Ceramic coatings? How are you fuelling? Exhaust, cooling capacity, etc, etc, etc. Personally, I don't like Garrett. Think they are a cheap mass production disposable product. I'd rather pay more for something decent that can take abuse. But that's me.
It all doesn't matter so much. What really matters (especially with Garretts) is what happens with your engine and analyzing the figures. EGT at exhaust port and downstream from the turbo are vital to keep an eye on. Same for oil temperature. And when they tend to go out of range (hook up the heaviest trailer you can, pick a long hill and wring it's neck to test), you can make adjustments/alterations to bring things back in line.
Not just for the sake of the turbo, but also the engine itself.
And there is also another major advantage - a cooler turbo makes more power - a LOT more.
I try to learn from the professionals
Sorry, I know different make car, but look at the two oil coolers and massive intercooler. Radiator even bigger, takes up full width of the body in the boot
3L 24V TD making 600bhp, now calculating how much can be gotten out of the new project 306 hdi...