what is RPM range? and does anybody else miss their tach?

Most of us that want more info just get a Scangauge. RPM can be constantly displayed.
X

 

or a phone app. or the pro dash if you really want all the info right in front of you!

 

According to my Ultragauge, the Gen2 redlines at 5k RPM.

 

According to my scan gauge 2, my Gen 2s PRMs at 60 MPH was between 1500 and 2200 on level ground.

 

If the car is moving forward at the speed that you intend, then why does it matter what speed the engine is running at?

If you care about the engine speed, it would be more interesting to see what speed MG1 and MG2 are operating at. MG1 speed and direction especially would be much more interesting to monitor, as the gasoline engine turns on and off.

 

You asked for the range, I let you know that the max is 5k and the minimum is obviously 0.

If you want a tach, Scangauge, Ultragauge, bluetooth OBD2 scanner for phone, and adding an aftermarket tach would be some of your options.

 

If you install aftermarket tack that attaches to ignition tack may need some modification to work. And it doesn’t work when engine is spinning but not using fuel.

 

The OBDII tachs mentioned show RPM even when the ignition is off. On the ScanGauge 2 it is important to tell it you have a hybrid, or it will go to sleep when RPM = 0

If you are used to 'car guy' meters, I run RPM, Volts DC, Engine Water Temp, and Intake Air Temp. There are literally over a hundred gauges you can program it to show. (4 at a time)

 

I miss the tach a bit. I miss coolant temp a lot. Resolve both omissions, and a LOT more, with a ScanGauge II. Still, built- in decent gauges would be nice.

 

I have filmed lots of Prius driving videos, some with aftermarket gauges.


Here's one with the 2010 of the ScanGaugeII:

This one is with my 2012 PHV of my phone running the Torque app:

And this is with my 2012 PHV using an export & convert of the data collected by Torque:

 

I can see the value of MG1 rpm but not the value of MG2 as this is a fixed value of road speed "approximately 120 x mph" depending on tyre size on the vehicle shown.

John (Britprius)

 

I can see some value in MG2 rpm when the car is cruising about 80kph and MG2 is generating to power MG1 as an overdrive for the ICE - for me that continues to be a really "cool" aspect of the HSD technology.

 

RPM of MG2 is always directly related to speed of front axle. It would be interesting to see power consumption or generation but RPM doesn’t tell anything about power (almost).

If Prius is going forward and we need “underdrive” so that engine can have high RPM power is MG1 that is spinning backwards (cause engine is spinning it that direction trough power split device) to MG2 that is spinning forwards at speed directly related to speed of car.

If Prius is going forward and we need “overdrive” so that engine can have low RPM power is MG2 spinning forwards at speed directly related to speed of car to MG1 that is spinning forwards (cause of power sent to it).

So its RPM and direction of MG1 that is interesting. Both of those situations are simplified since normally power is also sent to or received from battery.

 

Hi John - I'm a new 2008 Prius owner and would love to be able to add the data that you show on-screen. I've bought a bluetooth ODBII Interface (ELM327), but cant see where to connect it??. Also do the vehicle manufacturers have more than one type of connector.
I worry that the engine overevs when accelerating fast and the information you illustrate would be great.

 

I did that, but found that the frequent off-on cycles made the rpm info less useful than on a traditional car. I shifted that Scangauge field to gallons per hour fuel consumption , which seems to fit the Prius's mission better. "Engine Load" might be even better if you were trying to "drive with load" and pulse the engine at 80% load before gliding.

 

There's no reason to, since the system won't let you. Unlike a traditional vehicle, pushing the throttle to the floor doesn't allow RPM to climb as high as the fuel burst will push it. The engine is held to a maximum of 5500.

 

If you change the type of engine from gas to hybrid in the scanguage, the display does not turn off with the engine.

 

^^^to clarify--you are correct that the engine type must be set to "hybrid" so that the Scanguage does not turn off as the Prius engine cycles off. But even when that is done, my point was that rpm info on our Prius was essentially "engine on" (rpm>0) versus "engine off" (rpm=0), which was redundant with what I could hear. In contrast, I cannot distinguish fine gradations of fuel consumption or engine load by ear, so I substituted those fields for rpm. Just my preference for getting maximal useful,info with the Scanguage.