Pyrometer vs. O2 sensor
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Pyrometer vs. O2 sensor

  1. #1
    Senior Member cave's Avatar
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    Default Pyrometer vs. O2 sensor

    Here we go. Which one and why?
    I know a bit about the Pyrometer. I drill a hole into the #7 or #4 header. Tap the hole and install the sensor. This gauge reads Heat.

    The 02 Sensor, I have no clue as to how it works. I looked for a gauge but maybe I'm searching for the wrong part name.

    Is the 02 the same as a Pyro in how it works? Obviously the 02 meters oxygen. What are the numbers I should be looking for for safe running range? If its a number I'm looking out for.

    After finding out the hard way I don't want to do this again with out one or the other sensor.

    Any educators out there?
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    Cantard 71hallett's Avatar
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    get an Air/Fuel guage. It will tell you alot more than your egt.
    Egt is good but your biggest issue is the a/f, once you have it set you can watch egt for bad fuel, detonation exc.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    Senior Member cave's Avatar
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    Quote Originally Posted by 71hallett View Post
    get an Air/Fuel guage. It will tell you alot more than your egt.
    Egt is good but your biggest issue is the a/f, once you have it set you can watch egt for bad fuel, detonation exc.
    Please ESPLAIN 71 hallett, you got a pic or a link to a gauge?
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    Quote Originally Posted by cave View Post
    Please ESPLAIN 71 hallett, you got a pic or a link to a gauge?
    It needs to be a wideband air/fuel. www.dynojetwb2.com

    You can do a digital or analog gauge. I don't have one on the boat but I am putting one on the drag car. IMO the egt guage is more needed on a turbo setup, but the more safety stuff the better.

  7. #5
    Cantard 71hallett's Avatar
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    http://www.aempower.com/ViewCategory.aspx?CategoryID=67



    I have this one in the Hallett. Never let me down.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    21 Daytona Outlaw's Avatar
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    Autometer makes a nice wide band AFR, my nephew is using one
    and it works great.
    #55

  9. #7
    Senior Member cave's Avatar
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    Goodness. Thanks Big Ckiff.

    All I need now is a job at AIG to hook all this stuff up...
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    Senior Member H20MOFO's Avatar
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    Like Outlaw said make sure it's a wide band. It's pretty cool to watch too.
    Another Hot Boat refugee

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    Quote Originally Posted by cave View Post

    All I need now is a job at AIG to hook all this stuff up...
    You and me both........

  12. #10
    senior member turbo wog's Avatar
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    i have had both on my motor & the o2 sensor is good for dialing in the way it runs,for example seeing if it is leaning or fat when the power valves should or is kicking in , if it is fat or lean with just the primary circuit running,etc. but are you burning up the motor at 14.7to1 or 12.5 to1? how much boost? are you getting close to melting anything on a full run or are you starting to build up temp the longer you have it wot? this is where the temp is the most important. 12.5 to 1 afr just might not be fat enough , this is where you will know for sure. the pyro will tell you ,say @ 1450* & then you start building up to 1550* near the end of the 1/4mile or long run on the river etc. you will then know you are leaning out or it is just not fat enough on the big end.i usually melted stuff @ 1550 * on my motor at the location i mounted the guage. i am now running the temp @ 1425* i feel that i could run it at 1475* but i have not messed with it yet .

  13. #11
    Highaboosta Unchained's Avatar
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    EGT's are highest at Stoich so what do you do if it reads (what you think is) high ? Richen it up until it runs bad ?

    I used to monitor EGT's and on WOT runs it would read 1750+ but the engine ran good. Year end teardowns showed no problems so I ignore the EGT now.
    The EGT gauge sits on the bench and I use the A/F ratio gauge all the time.
    I think turbo applications are always going to read high because you are restricting the exhaust flow.

    Getting the A/F right is what matters, There is no changing whatever EGT the motor wants to run at.

    Twin Turbo 1800 HP V-Drive lake boat

    http://s621.photobucket.com/albums/t...t=MAH05771.mp4

    Quote Originally Posted by Trigger View Post
    No one cares about your buddies old antiquated garden hose technology.
    Quote Originally Posted by MAXIMUS View Post
    I think I could run more boost but it's a real hand full right now

  14. #12
    Senior Member cave's Avatar
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    Thanks everyone. I checked on all the gauges mentioned. 300 bux is the medium price for the AFR guages.

    I think I'm sold on the AFR's. I really like the Dynojet one. Its also a buck cheaper than the AEM. The Autometers are least costly for the basic gauge and the most expensive for the wideband.. But I'm still leaning to the Dynojets.

    I'm learning here. Thanks everyone..

    cave
    Last edited by cave; 12-17-2008 at 04:13 AM.
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  15. #13
    21 Daytona Outlaw's Avatar
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    this is the one my nephew installed on his blower motor
    and the one I will purchase also, wow what an eye opener
    you can tell what really going one with the tune.

    this gauge can be configured to alarm at a preset reading

    http://www.autometer.com/cat_gaugede...id=3604&sid=11



    LED digital display.
    0-4v data output feed for ECU, data acquisition unit, or Laptop tuning
    Auto-Dimming gauge brightness feature
    Includes high-quality Bosch wideband O2 sensor
    Display data in Lambda or numerical A/F ratio
    User programmable range
    Peak recall/memory
    10:1 to 20:1 AFR Range for Gasoline Applications
    Adjustable for Alternate Fuel Types (Ethanol, Methanol, Propane, CNG)
    6:1 to 18:1 AFR Range for Alternate Fuel Types
    User Programmable Warning Function
    This product has no provision for dial illumination/backlighting.
    #55

  16. #14
    Senior Member cave's Avatar
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    If0thats the same one its 365. and some change. what's the part numberN
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