How useful is the turbo pressure and exhaust temp guages
- Thread starter Huntman12
- Start date
The exhaust temp or pyro, shows the temp the pistons are exposed to and this can melt on temps over 1250f so You want to slow down after that and the intake pressure is how many psi are stuffed in the intake, on the IDI You want to stay under 12psi to be safe.
punkmechanic
diesel tech
The boost is more or less to let you know when your getting into a danger zone (12 psi plus). extended time in the "danger zone" or too much boost and your heads will lift.
the exhaust temp shouldnt exceed 1200 degrees ( some say a little more but I err on the side of caution, no one knows how accurate a gauge really is). If your exhaust is too hot then you could do piston damage.
These gauges, an eye on your exhaust color and consistancy, as well as your engine's "sound" will tell you how your engine is doing.
Is your truck an "f-superduty" (aka f450) or an f-250 or f350?
punk
the exhaust temp shouldnt exceed 1200 degrees ( some say a little more but I err on the side of caution, no one knows how accurate a gauge really is). If your exhaust is too hot then you could do piston damage.
These gauges, an eye on your exhaust color and consistancy, as well as your engine's "sound" will tell you how your engine is doing.
Is your truck an "f-superduty" (aka f450) or an f-250 or f350?
punk
Fozz
Full Access Member
They give you an indication how hard the engine is working. If working the engine hard, towing, etc. the info given above will let you know when you're at the upper limits for safe engine operation.
funnyman06
Full Access Member
I have a question. i was looking on the Banks site and saw that on a motorhome they tested egts were around 1700?? How is it that we melt our engine at 1200 but the 460 held together at 1700??
http://bankspower.com/products/show/127/63
http://bankspower.com/products/show/127/63
My guess is that the difference is they used a low compression gas burner and if the thing had stock egtsof 1700 it most likely has the valves to handle those kinds of temps If iconel 2540 deg and pistons and heads with no or highly alloyed aluminum since non alloyed aluminum melts at 1220 deg f.
1700 would be scary for anything since even cast iron starts to go gushy at about 2150 degf
icanfixall
Official GMM hand model
A gas motor always has a higher temp in the combustin proces. Sparkplugs foul out at low temps. I think it was arund 800 or 900 degrees but can't recall exact numbers... Getting too old...
Russ
Idont do injectors
Also is the pryo probe pre or post turbo? EGT's can vary as much as 300 degs. depending on where the probe is installed. 1250 is a max pre turbo temp, and about 950 is maxpost turbo temps.
hheynow
the misanthrope
Having a pyro is most helpful climbing long grades (and at high altitude) when EGTs can soar to melt down temps. This is why the big rigs stay in the truck lane going up hill where slowing down is the only way for them to drop to safe levels. When I find myself in this situation I too get in to the truck lane and have no ego issue doing it. But I'm very conservative and never push it over 1000*F (pre-turbo).
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punkmechanic
diesel tech
^^^ I second that.
