Garrett Turbocharger Speed Sensor:

[McRat]

P/N 781328-0002 "Pro Kit"
P/N 781328-0001 "Street Kit".

The Street kit comes with a dial gauge, the Pro doesn't.

I don't have one of these, but I'd like to play with one soon. You can put it in any turbo, but it requires you to drill and tap the compressor cover.

[eds04max]

GT4202R has a NPT tapped in the compressor already...............I would be interested in one!............I'll be makin' a call on Monday.;)
What do we need to read the 'Pro' kit???
Thanks for the info Pat!

[McRat]

The hole needs to be somewhere where it can "see" the compressor wheel.

Not sure about which dataloggers will work with the Pro kit. I think I'm going to buy the street kit just in case.

[slowlmm]

The hole needs to be somewhere where it can "see" the compressor wheel.

Not sure about which dataloggers will work with the Pro kit. I think I'm going to buy the street kit just in case.

when i checked i belive efi will work. when i get a bigger charger i will put one of theese in as well .

[eds04max]

The hole needs to be somewhere where it can "see" the compressor wheel.

Not sure about which dataloggers will work with the Pro kit. I think I'm going to buy the street kit just in case.

That dawned on me after I got to thinking about it..............seems as though it might be a little tricky getting that sensor in the 'right' spot?????.............maybe not. I don't have a core here to look at.

I'm thinking it would be nice to have a re-call for that ............similar to SPA.

[Mika]

Installation is easy, it just need few looks before drilling so hole goes in right angle. If supported bracket is installed also, it needs milling machine.

[Dan@PPE]

Pat,

Your gauge is in. The machinist is picking up the comp cover today.:D

[eds04max]

I just looked it up on Garrett's web site and their street kit gauge has the re-call. ...............nice set-up.
If it does in-fact work with EFI-Live.......that will be sweet!

[RodZZilla]

Here are the installation instructions

http://www.turbobygarrett.com/turbobygarrett/products/turbo_kits/turbo_kit_pdfs/781328_Speed_Sensor_Kit_Installation_Instructions. pdf

http://www.turbobygarrett.com/turbobygarrett/images/Product_Overview/Face01.jpg

[TurboDiesel]

Hi guys, I am new to the forum. So has anyone already installed the Garrett turbo speed sensor kit to his engine? Was it an easy work? Any photos of the drilling process? Where is the best place on the compressor cover to place it? Anyone used the pro-kit? How did he read the output signal? Does anybody know if it possible to connect the sensor output signal to an ADC card (connected to a PC)?

Thanks guys!

[McRat]

Hi guys, I am new to the forum. So has anyone already installed the Garrett turbo speed sensor kit to his engine? Was it an easy work? Any photos of the drilling process? Where is the best place on the compressor cover to place it? Anyone used the pro-kit? How did he read the output signal? Does anybody know if it possible to connect the sensor output signal to an ADC card (connected to a PC)?

Thanks guys!

I'd recommend having a machinist do it. It should be done on a mill. It has detailed drawings for the machining, but it's not a good project for a drill. PPE can do it, but you'd have to call for $.

It's signal is 0-5v pulses, so it can be captured by anything that handles tach signals. I was hoping for 0-5v volts=rpm so I could read it in EFILive, but not yet.

I've taken it to 90,000 rpm so far, and the "recall" is easy to use.

[TurboDiesel]

Thanks a lot McRat. It gives a pulse of 5V for each blade? After that it is easy to measure the pulses in the time and find the speed. However, in the case of transient operation how can you find the rpm from the pulses? Any photo of yours?
Thanks!

[McRat]

Thanks a lot McRat. It gives a pulse of 5V for each blade? After that it is easy to measure the pulses in the time and find the speed. However, in the case of transient operation how can you find the rpm from the pulses? Any photo of yours?
Thanks!

I'll try and snap some pics today. You program in the number of blades with a DIP switch, and it creates a normal RPM signal.

I'm working with Fingers to try and get it to a 0-5v signal so you can use EFILive, or A/D boxes with it.

Transient response? You aren't actually timing anything with it, so it's not important. The needle lag is always going to be there with any tach.

[McRat]

Here's pics.

Bad pic of gauge + sending unit is the one with wires.

[TurboDiesel]

Thank a lot McRat for replying and for the pics. You place the sensor so that it "sees" tha blades.


Transient response? You aren't actually timing anything with it, so it's not important. The needle lag is always going to be there with any tach.

Well I do not mean the transient response of the needle, but of the engine. Well, here is exactly what I want to do: I want to test some turbocharged diesel engines in transient operation (only the engines, out of the vehicle on a test bench) and capture the sensor signal to a PC through an ADC card. How can I do this?

Thanks again!

[Fingers]

Use a DAQ that has a counter input on it and do the simple math. So many counts divided by the time period. You can not use an A/D converter.

Remember, this sensor puts off a pulse every 8th blade it sees. If your compressor does not have 8 blades, you will have to adjust your math.

[TurboDiesel]

Thanks for the help. The truth is that I need to use an A/D converter in order to synchronise all measurements. What are the caracteristics of the pulse (level, duration)?

[Fingers]

Square wave signal. Your A/D converter must be capable of at least 8kS/s to discriminate the signal and really should be 5 times that.

Or are you talking about a Freq/Voltage converter?

[TurboDiesel]

Thanks for the reply. My A/D converter is capable of that. Well, I think it can work. However, yes another solution is the Freq?Voltage converter. I do not know much about it but I suppose is converts the Frequency to a proportional voltage signal, correct?

[TurboDiesel]

Hallo again after a long time. I just wanted to share my good news. I have installed the turbo speed sensor kit by Garrett in an old turbocharger (T-series) and it works properly for more than a year now. I have installed it in two different stationary diesel engines and in two trucks. No problem at all! The signal is, as you already said in here, a square wave of 5V with a frequency of one pulse every 8th blade and the output pulses are easily captured with an A/D card connected to a PC and with some simple maths the turbo speed is calculated.