Pyrometer probe placement - which side of the motor runs hotter on a naturally aspirated 7.3?
Pyrometer probe placement - which side of the motor runs hotter on a naturally aspirated 7.3? The driver's side is closer, but many have stated that the pass rear cyl runs hottest due to oil up from the CDR. If they are the same temp side to side then I will use the drivers side.
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1993 F350 Crew Cab Dually 4 Wheel Drive (Centurion Dually Conversion) 4.10 gears, 7.3 IDI Naturally Aspirated, E4OD with shift kit, Stock motor with glasspack/dynomax hemi magnum exhaust, and gutted soup bowl.
Re: Pyrometer probe placement - which side of the motor runs hotter on a naturally aspirated 7.3?
I run 2 pyrometers. each one has its probe close to where the exhaust bolts to the pipes. The driver side runs 100 degrees hotter for some reason.---Rob
Re: Pyrometer probe placement - which side of the motor runs hotter on a naturally aspirated 7.3?
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well, the drivers side has more exhaust over to the turbo , so I would have to guess that side is hotter by a negligible amount.
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That's funny. In his post/signature, naturally aspirated is mentioned 3 times. Which, last I checked, meant no turbo. [img]/ubbthreads/images/graemlins/biggrin.gif[/img]
I would agree that the drivers side seems to run hotter, but I don't know why.
Re: Pyrometer probe placement - which side of the motor runs hotter on a naturally aspirated 7.3?
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I run 2 pyrometers. each one has its probe close to where the exhaust bolts to the pipes. The driver side runs 100 degrees hotter for some reason.---Rob
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Any chance the wire on that side is shorter? It's best not to alter the wire lenght of the probe kits. The voltages involved are so small, that another foot of wire will change the resistance enough to cause the gauge to read inacurately. For that reason, most folks put the probe on the passenger side, since that is the best way to lay all the wire out. Making a coil out of it is a bad idea for RF reasons, and it is too long to do the drivers side convienently.
Re: Pyrometer probe placement - which side of the motor runs hotter on a naturally aspirated 7.3?
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Any chance the wire on that side is shorter?
[/ QUOTE ]well this afternoon I dug around under the truck and checked out the position of the wires to the probes in the exhaust pipes. all wires are stretched out ( no coils). No wires were shortened in the installation.two things that might mess with the difference in temps is 1-- drivers side probe is 1 1/2 inches from coupling and passenger side is four inches. [img]/ubbthreads/images/graemlins/shrug.gif[/img]2-- drivers side pryo is Westach [img]/ubbthreads/images/graemlins/laugh.gif[/img]passenger side is autometer [img]/ubbthreads/images/graemlins/grin.gif[/img]. On a long heavy pull temps will almost even out, but drivers side is always hotter [img]/ubbthreads/images/graemlins/shrug.gif[/img]---Rob [img]/ubbthreads/images/graemlins/smokin.gif[/img]
Re: Pyrometer probe placement - which side of the motor runs hotter on a naturally aspirated 7.3?
Sounds like there is enough difference to potentially account for at least some portion if not all of the temperature variation. I generally assume pyrometers to have a potential error of 100 degrees, which is why I never go past 1150.
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