PacBrake
12-05-2008, 11:54 AM
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PacBrake
Just wondering about the pac brake and extended idling. If it's bad to idle for extended periods because of low cylinder temperature, wouldn't the pac brake effectively raise the temp in the combustion chamber to prevent the wall washing?
12-06-2008, 09:12 PM
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That was the #1 reason I bought the Jacobs Exhaust brake for my truck. On cold start-up I activate the brake while idling and within seconds the voltmeter is up to normal range, meaning the grid heaters have turned off. Within 5 minutes, the temperature gauge is usually above the 140 mark, ready to go.
I've done oil analysis and winter fuel dilution has been very low on my reports. The only drawback is the IAT sensor needs routine cleaning. It gets dirty fast.
I've done oil analysis and winter fuel dilution has been very low on my reports. The only drawback is the IAT sensor needs routine cleaning. It gets dirty fast.
12-08-2008, 10:42 AM
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Along with that IAT, the intake must get awfully greasy inside too, huh? Mine is a filthy mess. The air horn and hose off of the intercooler are fine, it's just inside that intake manifold that's a mess.
What do you use to clean your IAT? Will regular old solvent work?
What do you use to clean your IAT? Will regular old solvent work?
12-08-2008, 09:17 PM
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Hey Wyo -
I run a pac brake on mine, it's handy to help warm up on cold days. The Edge Attitude I've got shows the EGTs increase significantly with the exhaust brake on, so, yeah, it does help warm it up. I also notice though, when when I'm towing on a down hill stretch and the exhaust brake is on, my intake manifold temps increase, too. They'll go off the charts, meaning > 200 f. I'm not certain if this is crudding up the intake or not, it's just an observation of mine at this point. What are you seeing? Most effective, though, for warming the darn thing up in the morning, is to have the block heater plugged in on a switch that'll fire it up a couple hours before I use it.
I run a pac brake on mine, it's handy to help warm up on cold days. The Edge Attitude I've got shows the EGTs increase significantly with the exhaust brake on, so, yeah, it does help warm it up. I also notice though, when when I'm towing on a down hill stretch and the exhaust brake is on, my intake manifold temps increase, too. They'll go off the charts, meaning > 200 f. I'm not certain if this is crudding up the intake or not, it's just an observation of mine at this point. What are you seeing? Most effective, though, for warming the darn thing up in the morning, is to have the block heater plugged in on a switch that'll fire it up a couple hours before I use it.
12-09-2008, 08:34 AM
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What I have seen is a nasty intake and IAT. Everything alse down line is ok (intake horn, intercooler hoses.) I too, have noticed the egt's jump up with the brake on and incedibly shorter warm up times. As far as block heaters I have just plugged mine in at night and left it all night long. My truck is actually in pieces right now and I have a new air cylinder for the pacbrake waiting to go on. Hopefully I'll have it done by Christmas....but highly doubting it 
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