Jump to content
SAU Community

Throttle Butterfly Valve Angle And Air Flow Vs Rpm Rb25Det

spg1122
 Share

Recommended Posts

spg1122 Rookie

spg1122

Posted
Posted

Hi guys,

does anyone know the different angles of the throttle butterfly valve with respect to the rpm range of the engine?

I also need to know the air flow rate with respect to the rpm of the engine.

The engine must be a rb25det, preferably running with stock turbo, stock boost and stock intake manifold.

I know most of the info can be obtained by consult software like Ecutalk, but I don't have access to a consult cable.

I need the info for some CFD work.

Any help would be much appreciated!

Sam

mad082 Grand Master

mad082

Posted
Posted

very few people will be able to give you info on the angle of the butterfly. percentage of throttle yes, angle no. but having said that, you can have the throttle wide open at any point in the rev range. you can also have the throttle only open a little bit and be at redline. it all depends on the load.

as for airflow, again that will only be info as the voltage of the airflow meter, not as an actual rate of airflow.

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • sausagepianist
      V36 2008 Coupe Wiring Differences with Android Screen

      By sausagepianist · Posted

      Right, here's a video of the basic operation at least.  This is what you can expect day to day when you turn the car on and it boots from standby.  The only thing from a media point of view I haven't gotten working is for it to autoplay plexamp when it turns on from standby (it works from cold boot) but that's more of a plexamp problem as it will autoplay other music players.  Also attached is my one stray cable.  It's part of the screen's wiring adapters but there's just nowhere for it to go in my car.  I've just now done a bit of research and found a matching port on a 2010-2014 head unit with BOSE.  Mine has no BOSE so that's that case pretty much closed I think.  Plugging in the Infiniti AC panel basically did nothing for me, so that's a dead end as well.  Next port of call is to mess with this CANBUS module and see what I can find from it.  I found this resource containing the DBC files for a 2010+ G37 : https://github.com/icecube45/Dash_InfinitiG37/blob/master/InfinitiG37.dbc I'll now have something to go from when I try to extract my CANBUS data so I can see if the HVAC Mode, Fan Speed, Temperature, etc. match and also the gear shifter position.  It's a pretty big assumption that it's just mismatched CAN signals but considering all the devices in the CAN network are talking to each other (AC can be fully adjusted just with no info on screen) it might be a safe one.  I will report back WhatsApp Video 2025-02-26 at 12.49.10.mp4
    • sausagepianist
      V36 2008 Coupe Wiring Differences with Android Screen

      By sausagepianist · Posted

      Thanks for that Paul.  Do you think if I posted a picture you'd be able to remember where it went? 
    • sausagepianist
      V36 2008 Coupe Wiring Differences with Android Screen

      By sausagepianist · Posted

      Sorry Duncan, I didn't get a notification for the replies.  Thanks for responding!  It's a full Android device, but does allow you to use CarPlay/AA as well.  This is the one I bought from NaviRS on AliExpress: https://www.aliexpress.com/item/1005006368602668.html?spm=a2g0o.order_list.order_list_main.111.59aa1802JDzQ0E - the 2K 8G-256G CAM variant but it seems to have gone up by £170 since I bought it!  My purchase was ￡307.14.   It's not the fastest thing in the world but performs perfectly adequately.  It stays on standby unless I disconnect the battery and let it power down, then it's just a fairly standard Android bootup time from cold.  The DSP Equaliser is very nice and made the standard stereo system sound pretty decent compared to the stock screen.  Perhaps I can take a video of it when I get a sec. It *allegedly* supports the reverse camera, but I'm yet to get that working.  It has options for reverse cam (a camera unit can be bought separately) or 360 cameras (also bought separately).  To be fair it doesn't seem to detect that the shifter was put into reverse but I'm working on a theory about this as well.  At the moment I'm going without which is a bit annoying considering the car is an absolute canal barge but so far I haven't caused any damage I'll grab a picture of the wire I'm missing later today when I can get outside.  My theory, by the by, is that not only is the head unit different, but the CANBUS network has different signals for the different years.  I think this because I have a spare AC panel from a newer Infiniti G37 (as opposed to my Nissan panel) which wouldn't control anything except the volume when I had it wired up with the stock system.  I'm going to throw it back in and see if the screen will respond to it.  I've just ordered an arduino CANBUS module so I can have a look at the signals going around the car and see if I can spot anything.  I'm thinking if I can work out what it's expecting vs what it's getting I might be able to translate and relay the signal back but so far just a theory anyway. I also found this on my travels, so far the only one that specifically matches my car: https://www.aliexpress.com/item/1005002822934280.html?spm=a2g0s.imconversation.0.0.33433e5fgttovi If you look at the picture of the before, it has the card reader slot, and the picture of the head unit is exactly the same as the one pictured in my original post.  I asked if they sell the cables separately but sadly they won't.  I didn't want to just buy this one because it's a super old Android version and only dual core - likely slow as hell. 
    • sonicii
      V35 Overheat + Coolant Boil & Overflow + Engine not Starting

      By sonicii · Posted

      As above, you did refill the coolant and burp the system before running it again didn't you?
    • GTSBoy
      UniClutch

      By GTSBoy · Posted

      To be fair - you see the same thing for every clutch. There's always someone making an installation error.
×
×
  • Create New...