Selecting a turbocharger for the 300 six

[Walken100]

For heavier tuck applications pulling a grade.....could you simply back off the boost with a controller and run a few psi or would the excess heat still cause detonation.

Would the few psi aid in the reduced o2 atmosphere of the higher elevation?

This question partains to a working truck for work and camper towing....not so much Street/ race.

Here in Colorado we refer to that as altitude compensation!

 

[BadToTheBown]

If I'm not towing, lowing to run 2-5 lbs of boost. If 5 lbs does it, no more, 10 lbs max. Other than the sizing of the turbo, it does alll the altitude compensation. Because of the waste gate, 2 lbs is 2 lbs at all altitudes....

 

[bronco6banger]

Appreciate the replies. I was advised against using a turbo charger for my application which is medium duty towing camper in old crew cab 4x4.

The the concern mentioned was heat pulling the hills ( makes sense) but I was wondering if simply backing off the boost for the 2% of the time I'm pulling the hills if it would be advised to run a turbocharger for this application.

I suspect even with less boost it would still be hotter air.
7,000 ft is the highest peak from 3000 baseline elevation.

I've never gotten AK Miller's 300 turbo kit out of my mind.... Just something simple. Of course I never owned one so I don't know how problematic they could be.

 

[pmuller9]

If I'm not towing, lowing to run 2-5 lbs of boost. If 5 lbs does it, no more, 10 lbs max. Other than the sizing of the turbo, it does alll the altitude compensation. Because of the waste gate 2 lbs is 2 lbs at all altitudes....

The elevation does not change the size of the turbocharger.

Also 2 lbs is 2 lbs at all altitudes.... is not quite correct.
The 2 psi is a gauge pressure.
At 12,000 feet the air pressure is 9.2 psi added to the 2 psi from the turbocharger is 11.2 psi absolute.
At sea level the air pressure is 14.7 psi added to the 2 psi from the turbocharger is 16.7 psi absolute
That is a 5.5 psi difference.

Secondly, a turbocharger has to work at a higher pressure ratio to develop 2 lbs at a higher elevation.
This makes the compressed air going into the engine hotter, so the air density is less.

 

[pmuller9]

The the concern mentioned was heat pulling the hills ( makes sense) but I was wondering if simply backing off the boost for the 2% of the time I'm pulling the hills if it would be advised to run a turbocharger for this application.

Two things here.
Use the right size intercooler
Have the EFI system compensate the ignition timing based on engine heat.

 

[BadToTheBown]

Two things here.
Use the right size intercooler
Have the EFI system compensate the ignition timing based on engine heat.

I see your point, boost is gauge pressure, not absolute, my bad...suggestions on determining the "right size intercooler"? Your last suggestion motivates me to look harder at a squirt stand alone to tune things just like this...thanx...