pyro temp reading too high

[Manstein]

I recently turbo'ed my truck. I rolled the timing back during the swap and installed a pyrometer. Since being able to monitor the EGT if I get under a load or floor it the temp reading on the pyrometer will go up past 1200. I have to throttle way back to keep it below 1150 when climbing a hill which slows me way down. Do I need to try and turn the fuel back on the pump?
I wished I'd have installed the pyrometer before the swap so I knew where the temp was prior to the upgrade.
I also put in a new airfilter, thinking it might be restricted. No change.

 

[m-35tom]

yep, just turn the fuel back so you don't melt something. reading on non turbo would be kinda useless.

 

[FreightTrain]

well,Looking in my rear view mirror,Your fuel was turned WAY up.Turn that thing down a little.Did the air filter help "ANY"?

 

[Manstein]

Negative. The air filter had no effect.

 

[jwaller]

turn it down unless you can do it with your foot. mine is close but if I keep it to the floor it will pass 1200.

also your temps will change some between unloaded and loaded.

 

[cranetruck]

Is your pyro installed correctly? If the incorrect length thermocouple wires are used and error will be introduced on some instruments.

 

[Blood_of_Tyrants]

In my understanding of reciprocating engines, lean fuel is the cause of high exhaust heat. The cure is making the mixture richer.

 

[cranetruck]

In my understanding of reciprocating engines, lean fuel is the cause of high exhaust heat. The cure is making the mixture richer.

Not true for a diesel.

 

[DanMartin]

Do you have a boost gauge? What kind of boost are you getting when your EGT climbs past 1200?

 

[Manstein]

The pyro is in just like the instructions you sent me Bjorn. I think the gauge is reading accurate. The truck would run 65 before the turbo addition so, I think the fuel was turned up. How far should I back it down? A 1/4 turn, half turn or just barely move it?
Thanks.

 

[m-35tom]

if you can run 65 it has nothing to do with the fuel rate but i hope you have a spare engine

 

[OPCOM]

Quote from mechanic at Memphis Equipment "you run it over 2600 and you gonna throw a rod"

 

[Manstein]

Well, two complete turns (backing off) on the fuel metering nut and I'm borderline just over 1200 degrees. I guess the NA engines have the fuel turned up substantially higher than the turboed ones. I think I'm going to throw another 1/4 turn for good measure.

 

[jwaller]

either that or your density compensator is bypassed or is stuck in high rate delivery mode.

 

[cranetruck]

The "smoke cam" angle is different for the N/A engine, never figured out how much of a difference it would make.....