Towing with Smarty JR on stock truck
#31
Registered User
Why do you need an exact measurement at 873°? I can tell in an instant where my EGT's are accurately enough to know if I need to pay more attention. I can tell faster with analog, again I have both styles in my truck and have flown aircraft with both. Analog is faster/easier, providing a driver with more time to look at the road. Same thing with aircraft, our essential engine parameters are displayed in analog and digital. The analog is used to quickly glance at the conditions and then if you are near a limit you can look at the digital to see where it's at, but that takes more time and if your not near a limit there is no reason to know if your at 744° C or 80% of the way to a limit and one of those readings gets your eyes back outside faster.
I have a buddy with a Outlook, holy crap is EGT's are a pain to watch. The numbers are changing so fast all you really can read is the first digit or two, and you get zero reference to rate of acceleration like you do on a analog gauge.
I have a buddy with a Outlook, holy crap is EGT's are a pain to watch. The numbers are changing so fast all you really can read is the first digit or two, and you get zero reference to rate of acceleration like you do on a analog gauge.
#32
You may be able to read analog more quickly and I prefer digital......neither one of us has presented any scientific evidence as to which is processed by the brain more quickly, I'll just agree to disagree with you on this one.
#34
It really is not a fair comparison because the ratio of people able to fly a high end aircraft as opposed to drive a vehicle is so disparate. Failure to process speed fast enough in a vehicle geenrally ends up with a fender bender, failure to do the same thing in a high end aircraft frequently ends up making a crater in the ground.
Example:
0015
5100
1500
5001
0051
The above all contain the same digits, they are the same length, etc. In order for the number to make sense you must read left to right as that is the way we interpet sequence. Even then it is still just a number with no reference, YOU must provide the reference and YOU have to decide what the reference is, temperature, psi, etc. With an all digital display you have many references and many disparate scales to apply the number to. That all MUST be done before the number makes sense.
You CANNOT know 1500 is a bad number UNLESS you read it correctly, apply it to a known scale, and interpret the position on the scale. That is a lot more steps than a needle position NOT where it normally is.
#35
#36
#37
Conversion from analog to digital always looses a little accuracy due to the interpolation algorithms used. The less you pay the wider the variance. Good accurate digital gauages are $$$$.
All the digitals seems to be slower to react and a smoother range. That is due to the shaping algorthms used for user experience. The ECU extensively modifies those readings to suit and expected result. Most of the digital processors do the same thing to one degree or another.
All the digitals seems to be slower to react and a smoother range. That is due to the shaping algorthms used for user experience. The ECU extensively modifies those readings to suit and expected result. Most of the digital processors do the same thing to one degree or another.
#38
Registered User
I have looked at these in the past, they look like a decent solution for me. If I were to add a Smarty Jr. I would want the safe start up mode.
I found it for $270 shipped with a free EGT pyro kit, seems like a great deal if it is a good unit. Looking at another thread on here the user didn't seem thrilled:
https://www.dieseltruckresource.com/...9&postcount=13
I found it for $270 shipped with a free EGT pyro kit, seems like a great deal if it is a good unit. Looking at another thread on here the user didn't seem thrilled:
https://www.dieseltruckresource.com/...9&postcount=13
#40
An analog gauge it is setting the range based on the signal from the sensor. The gauge range is correlated to the sensor signal range.
With a digital the analog electrical signal is interpolated to a digital value. The number reading is correlated to the range of digital vlaues.
The interpolation introduces errors depending on the size and granularity of the conversion table. Size and granularity add memory and processing overhead which adds time to resolve. Its a tradeoff in cost, accuracy, and speed to generate an adequate user experience.
#41
I still believe the benefits of a all in one digital/analog display with to many to list functions, that is easily installed, unplugged updated, repaired, moved, removed out weigh the permenant removal of the handy a-pillar handle, or install of 3or4 gauges somewhere. I hope the future trucks have these displays where the navi-sceen is. The new Long-Hauler has what looks like both analog and a sceen in middle of two gauges on the factory center stack, very nice.
It was interesting to learn about how my brain process info, i kind of thought i was into trucks because there wasnt much up there. AH-64 you have a awsome job, flying that is. Glad you have both types of gauges.
It was interesting to learn about how my brain process info, i kind of thought i was into trucks because there wasnt much up there. AH-64 you have a awsome job, flying that is. Glad you have both types of gauges.
#42
Do any of the analog gauges have alarms as the digital gauges do, that inform you when you hit a predetermined value and actually bring your attention to a potential problem?(Allowing a driver more time to observe the road). Lets assume we are using a typical gauge package which is marketed by Autometer or the like for monitoring our trucks, not a high end specialized gauge that is not in most folks budget, when you calculate the percentage of error for an analog gauge. I am well aware that the more expensive an instrument is, the lower percentage of relative error for it's measurements.
#43
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Join Date: Oct 2008
Location: 2Falls, ID
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AH64ID- I'm up in Kuna alot these days, several friends there and my father in law is there too. If you don't mind i'd sure like to take a ride in your truck after the Garrett turbo. I'm getting bored with my stocker and thinking about going all out.
As far as the guage thing goes, if anyone ever notices when driving analog anything, which from what i've been in, everything from john deeres, kenworths, dodges, and cessna 172's all share one thing. Safe zones of operation are almost always oriented at 12 O'clock position. You don't need The idea is just a sweep for Needles pointed up. all needles up straight, good to go.
As far as the guage thing goes, if anyone ever notices when driving analog anything, which from what i've been in, everything from john deeres, kenworths, dodges, and cessna 172's all share one thing. Safe zones of operation are almost always oriented at 12 O'clock position. You don't need The idea is just a sweep for Needles pointed up. all needles up straight, good to go.
#44
You can think what you want, but analog signals are easier to process at a glance. An analog scale or gauge doesn't take effort to read its reading, a digital gauge must be read and then correlated to its position relative to limits.
Noticing a needle is in the middle of its safe range is far easier than going, 34.. okay 34 is good, limit is 23 to 120. Like it or not that is how your brain will process it.
Both the A and D use the same style indication in the helmet display for radar altitude, its a digital readout above 200 feet, but as you decent below 180 feet an analog scale appears becuase its easier to look at an analog scale at a glance and interpolate it.
Noticing a needle is in the middle of its safe range is far easier than going, 34.. okay 34 is good, limit is 23 to 120. Like it or not that is how your brain will process it.
Both the A and D use the same style indication in the helmet display for radar altitude, its a digital readout above 200 feet, but as you decent below 180 feet an analog scale appears becuase its easier to look at an analog scale at a glance and interpolate it.
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