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  #1  
Old Posted 10-27-2005, 01:30 PM
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budkole budkole is offline
 
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Duramax normal operating temp

Does anyboby know the optimal "normal" operating temp of the duramax and are the different versions the same temp also, lb7, lly, lbz
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Old Posted 10-27-2005, 02:00 PM in reply to budkole's post "Duramax normal operating temp"
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When I have my Predator hooked up I usually see around 190 to 195 for normal temps.
I have noticed that my milage isn't as good when the engine temps are low.

I'm no expert but I would guess optimum temps would be near 190
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Old Posted 10-27-2005, 02:23 PM in reply to miniwally's post starting "When I have my Predator hooked up I..."
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Yeah, mine never crosses 200 even with the chip AND ambient over 110.
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Old Posted 11-07-2005, 08:29 AM in reply to BadDog's post starting "Yeah, mine never crosses 200 even with..."
Burt4x4 Burt4x4 is offline
 
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The gage for mine is about 200-205 all the time..my tranny looks like about 150-160...
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Old Posted 11-07-2005, 08:55 AM in reply to Burt4x4's post starting "The gage for mine is about 200-205 all..."
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My lb7 usually goes around 190. Hottest I ever saw was NB Cuesta Grade (101 north of San Luis Obispo) at 105 degrees or so with my 15000lb trailer behind, it hit about 215 I think. That's with the six-gun on level 3 at 55 mph. EGT's were at 1250 pre-turbo if I recall.

Marc
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Old Posted 11-07-2005, 01:25 PM in reply to Burt4x4's post starting "The gage for mine is about 200-205 all..."
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Quote:
Originally Posted by Burt4x4
The gage for mine is about 200-205 all the time..my tranny looks like about 150-160...
Same guage readings as mine. I hook up my Predator and do inflight checks and see 195 degrees on the predator at the same time I see the roughly 200 to 205 reading on the factory guage. I guess one of them is a bit off.

I think all engines these days a running on the high end of the 190s to the low end of 200 for normal temps. I think it has something to do with Emissions???
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Old Posted 11-07-2005, 02:50 PM in reply to miniwally's post starting "Same guage readings as mine. I hook up..."
Burt4x4 Burt4x4 is offline
 
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Ya I would guess emissions and maybe cuz of the higher compression thease engines are running...?
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Old Posted 11-08-2005, 12:13 PM in reply to miniwally's post starting "Same guage readings as mine. I hook up..."
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Quote:
Originally Posted by miniwally
I think all engines these days a running on the high end of the 190s to the low end of 200 for normal temps. I think it has something to do with Emissions???
From what I know, thats it. THe hotter they can get them to run the better off they are with burning everything up for emmissions, or so I've been told.
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Old Posted 11-08-2005, 01:36 PM in reply to RJF's Red Cummins's post starting "From what I know, thats it. THe hotter..."
Terrain Twister Terrain Twister is offline
 
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It's all emmisions related. The compression ratios are actually going down while the turbo boost pressures are going up.
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