They're probably fine; as often as not, relative numbers or trends are more important in gauges as absolute values anyhow.

 

Well as my other post stated with a 03 ho and predator on preformance non stack I was seeing only 800max and on extreme stack I am only seeing 980-1k. I am seeing 220 at idle in P or N and 300 in D. 400-500 cruise at 65mph.

I have the prob here

I have been noticing it heats up fast like 750-800 on extreme stack before 1900 rpm and then slows down gaining only another 150 by 2300 for like 950 and at 2500 it dropped 50* ends up around 900 ish. I am thinking its the truck more and more.

It did make 39 psi on the boost tonight with air temp around 80, most I seen before was 36 so I need to re adjust the boost elbow. I am starting to think fuel pump, so this will be my next thing I check, either that or flashing the factory ECU.

 

I think the best way to check your cal would be to temporarily swap complete pyro/gage units with a buddy and run it over a familiar course. If both units agree, great. If not, now you've got something to work on.

 

Dont know anyone else around here with a pyro, would have to buy another one and try it out.

 

If your pyro is pre-turbo those numbers are low accross the board. I see 250-300 at idle (with A/C off) in P or N, 500 in D, and 700-800 cruising. It sounds like there is definitely something wrong with your gauge and/or probe.

 

I have the Recon and I think my reading are high. 400 range at idle. Cruising 70 mph it will be about 900-1000. On hills it will reach 1300- 1450. Probe is in the recomended location. I no longer have the Quad box and am running stock(with quad wot 1700 easy). Not sure if it is the recon or the truck.

 

Would be nice to get some info from a egt expert or maybe Quad himself, I want to trust my gauge but its hard to with the numbers seeming so far off. So do I start looking for a issue that might not exist or buy a new gauge I can not afford to see if its right??

Already dealing with the fact you can not see the numbers with even a little gauge, if I cant trust it then what the hell is the point of having one.

 

You guys that are seeing differences need to look at them steady state. Every manufacture builds these things differently and it will affect the reaction time.

I use one probe and have it hooked to my Attitude box and to a Isspro EGT gauge and have had it connected to my Fluke mV simulator and they all match more or less steady state but my Fluke response is faster then the Attitude which is faster then the Isspro gauge. Does that mean the Isspro is bad?? No but I can expect that I reach peak temperature several seconds before the gauge showed the temperature.

Would I need to see the response time of the Fluke? No it is not needed for 99.99% of driving.

Also as mentioned before the absolute temperature (within reason) is not needed but the trend of the temperature. If you always read 975 on the highway at 70 miles per hour then one day it reads 1075 or 875 it means you may have a problem. But if form day one it always reads 875 or 1075 then those numbers are most likely just fine and your truck does not have a problem.

 

I completely get what you are saying. But if the gauge is 20% off at 1200 temp it would really be 1440. I would think I am safe and the engine would be in the danger zone.

I am finding that more and more ppl are reading higher then 220 at idle and at 60 mph I have narrowed the average down to 460* on flat ground, overpass's I hit 500 and the back side I can go as low as 400, I suspect the ECU defuels when the engine is braking.

Tomorrow I am going to do some experimenting, see if I can figure out what is up. I am just having a hard time believing I am only hitting 980* with a programmer, seems everyone hits 1200 or more with ease.

I am not one to blindly follow gauges, if I find its dead on with my experiments this I will post that, also that should tell me I have a fuel issue.