Re: how hot is too hot of an operating temp?
[Re: Pool Fixer]
#894175
01/02/11 01:27 PM
01/02/11 01:27 PM
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Joined: Jan 2003
Posts: 104,346 Garden Grove, CA
OzHemi
Penguin-hating Ginger
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Penguin-hating Ginger
Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
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Quote:
yes, dual spal fans (1300cfm each) but due to total lack of room between WP pulley and the rad core(two row aluminum Fluidyne) the fans are mounted up high on the rad. bottom third of rad isn't getting air pulled through it. I think that's my problem. I don't know if I should create some sort of shroud to cover that part of the rad and leave fans where they are or maybe go with the feets mercedes fan that would cover more of the core (I am a bit short on clearance even for that though so i'd have to get creative)
I was running a flowkooler wp with the plate tacked on and I switched it out for a parts store stock replacement. There was no change in performance.. but enough of a hijack here. As much as I'd love to get my issue resolved, it's this guys thread...If you have any suggestions though, please please PM me. Thanks so much. Kevin.
Can you run an aluminum shroud and mount the fans in it, so it pulls from the entire radiator ? I used this setup in my Torana (Not a Mopar, but you get the idea ) and works very well. Spal fans as well by the way...
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Re: how hot is too hot of an operating temp?
[Re: Pool Fixer]
#894176
01/02/11 01:43 PM
01/02/11 01:43 PM
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Joined: Oct 2003
Posts: 1,371 Costa Mesa, CA
chache876
pro stock
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pro stock
Joined: Oct 2003
Posts: 1,371
Costa Mesa, CA
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Quote:
I know I don't know as much as many members here, but I just don't like 200 for our cars. I know that new cars run that hot but they are designed to run safely on the edge. EFI, knock sensors, computer spark control to retard timing, etc..
Personally, I don't want mine going over 180 if I can help it. I took my big block charger on a road trip this summer, sat in 3 hours of stop and go traffic to get a total of about 20 miles. It got to 210 in stop and go. No, it didn't puke and overheat, but I still didn't like it. I'm trying to come with some solution to get it to run cooler at idle. as soon as the car moves, even 20-30 mph, the temp drops right to 170 where my temp sensor is set (electric fans running off sensor)
True, a lot of reasons why today's engines are able to run a lot hotter comfortably has to do with new technology, materials, etc...Even if youre still running an original untouched engine from 40 years ago I think anything under 180 is not nearly warm enough. For example I know on my 72 demon's stock temp gauge, when the temp is at about 180 the needle has barely moved, at about 200 its right in the middle. I just did a quick lookup on thermostats from a few different engines back then and they all said 195 was the OE thermostat temp. Whether thats right or not I couldn't tell however.
An engine thats not fully warmed up is going to cause some problems. As inefficient as internal combustion engines are, they are even less efficient at cold operating temperatures. Youre going to see worse gas mileage since the colder than engine is, the richer the mixture has to be and youre going to see less power because of that.
Worst of all, cylinder wall wear increases the colder you go, especially under 150 degrees and under 130 is when rust occurs rapidly. For every gallon of gas burned, about a gallon of moisture is created in the cylinders. That combined with unburned gas that gets by the piston rings into the crankcase and forms acids that wear parts and form rust, making it important that the engine reaches a hot enough temperature to combat that.
In my opinion I wouldn't run anything lower than a 180 tstat. If you have electric fans make sure the turn off temp is higher than what your tstat's rating is.
Sorry for the long post and not trying to attack you or anything, just figured I'd share some info with you that would maybe make you not worry about those temps youre seeing. 210 degrees is perfectly fine IMO
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Re: how hot is too hot of an operating temp?
[Re: MY340]
#894186
01/04/11 01:58 PM
01/04/11 01:58 PM
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Joined: Dec 2003
Posts: 10,938 Spokane Valley, WA
Big Bad Bee
I Live Here
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I Live Here
Joined: Dec 2003
Posts: 10,938
Spokane Valley, WA
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Rick Ehrenberg did an excellent article a couple issues back on cooling systems, fans, shrouds. He talks specifically to the high temperature issue. 200 degree running temps don't freak him out, and he's flogged more than a couple of cars. I hate to sound like I worship the guy but he is THE MAN.
I’m listening.
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Re: how hot is too hot of an operating temp?
[Re: Big Bad Bee]
#894187
01/04/11 03:04 PM
01/04/11 03:04 PM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
200 degree running temps don't freak him out
Well considering 195 is a factory t-stat I don't see why anyone would be freaked out with a 200* temp.
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Re: how hot is too hot of an operating temp?
[Re: buildanother]
#894189
01/05/11 08:40 PM
01/05/11 08:40 PM
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Joined: Jan 2005
Posts: 3,344 Central TX
roe
OP
master
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OP
master
Joined: Jan 2005
Posts: 3,344
Central TX
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well guys I replaced my factory sensor so now i have both gauges. When my aftermarket gauge reads 200 degrees my factory gauge is right in the middle of the operating temp. Actually its just a little less than halfway. it hasn't.spiked up to 220-230 again yet, must have worked the air pockets out. If it does I will report back what my factory gauge reads when it does.
roe
1971 Plymouth Satellite 408/904 8 3/4 3.23 SG
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Re: how hot is too hot of an operating temp?
[Re: buildanother]
#894191
01/05/11 11:06 PM
01/05/11 11:06 PM
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Joined: Mar 2005
Posts: 2,060 Pendleton NY
terzmo
top fuel
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top fuel
Joined: Mar 2005
Posts: 2,060
Pendleton NY
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Quote:
200 is not hot, and GM has had some switches on front drive elec fan cars, not coming on until almost 240. So sit in traffic with your non a/c car on a hot day and enjoy.
another apple and orange comparison
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Re: how hot is too hot of an operating temp?
[Re: chache876]
#894192
01/06/11 10:14 AM
01/06/11 10:14 AM
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Joined: Jan 2006
Posts: 8,162 USA
360view
Moparts resident spammer
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Moparts resident spammer
Joined: Jan 2006
Posts: 8,162
USA
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195 degree ..... 18.00 MPG 175 degree ..... 17.91 MPG 155 degree ..... 17.82 MPG 135 degree ..... 17.74 MPG For whatever it is worth the above is what Kevin Gertgen's 'Fuel Economy Calculator' program http://performancetrends.com/fuel_economy_calculator.htm predicts for a stock 1995 2wd 5.9 V8 46RH auto Ram pickup with 3.55 diff, travelling down a level concrete highway at a steady 70 mph on a windless 42 degree F day The program does not allow thermostat temps above 195, but one might speculate that each 20 degrees of coolant temperature increase might be worth 0.1 MPG I know that if you idle a 1995 Ram for ten or so minutes with the factory radiator fan removed, but with Evans NPG coolant to prevent boil over, the coolant temperature goes up from 193 to 240, the idle smoothness noticeably improves, and the fuel consumption drops from 0.66 gallons per hour to 0.60 When at speed on a highway, if you raise the coolant temperature by blocking airflow through the radiator, rather than by thermostat action, you might get an even better MPG gain, because air flowing through the front grille and then out the bottom of the vehicle is a major source of aerodynamic drag. NASCAR teams of course routinely block off as much of the grille as cooling will allow, and the new GM Cruze has shutters on its radiator opening.
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Re: how hot is too hot of an operating temp?
[Re: cjs69mope]
#894194
01/06/11 11:51 AM
01/06/11 11:51 AM
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Joined: Oct 2003
Posts: 3,698 NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
try to find electric fans that will fit on a 26 in radiator and pull like that ! very dificult !
Mercedes fan!!
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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