Shownomercy

iTrader: (1)

Kind of a generic question, but, what sort of data would one keep an eye on to indicate a turbo out of steam?

I have a old PT76gts and currently run ~15psi on a 383ci gen 2 LT1.

I would like to see how far I can push it and was just getting information before I do something dumb. Plan is just to add air and not touch timing. (its fairly lazy, combined with a fat 10.5afr in PE)

slowride

iTrader: (3)

I'd say air temps going nuts or with a 383 the backpressure has got to be real high by now. If you have good fuel you might be able to close the gate and see what the turbo makes, but I doubt you will get to a really high boost number or at least not up top.

Shownomercy

iTrader: (1)

80# sticks, 8an feed/return, and a 4301 pump.

I think I would run out of injector but not sure.

stevieturbo

Turbo shaft speed.

Ability to make and hold boost

pre-turbine pressure.

Compressor discharge temps

Shownomercy

iTrader: (1)

Thanks, seems to be a consistent them to check IAT which makes sense. I will try and install a basic mech drive pressure gauge before this tune session.

Honestly just hoping to get it to push 20psi and perhaps squeak out 800/800 area

pdxmotorhead

Haven't bought one in a Looooong while, but there was a LED tach gadget you could buy from big diesel suppliers that went on the cold side and measured the speed of the wheel, all you had to do was tell it how many blades and install it per the directions.. Was pretty simple. They had them on some generators I used to "own" as part of a building I took care of..

Shownomercy

iTrader: (1)

Anyone have any luck running a back pressure sensor output thru HPT pro interface?

slowlsx

iTrader: (28)

Why is it so rich? Leaning it out is probably safer on ur motor then having that much fuel in it. Not to mention that rich probably isn't helping ur laziness or backpressure.

Shownomercy

iTrader: (1)

Short story is tuner thought he was protecting trans from slip. So we left it rich.

Never been lazy, small turbo and decent cube size motor.

gametech

iTrader: (1)

Why complicate this? When you turn up the boost and make no more power, your turbo is maxed out. Efficiency will have left the scene long before that, but the window was closed on efficiency the moment you decided to max out anything.