Topic: Question on Temps
in Forum: C3 Engines
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Former Member
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Stanley, NC - USA
Joined: 8/9/2010
Posts: 91
Vette(s): 1981, dark blue w/carmel interior. 350 stock, auto tranny, Q-jet carb, ECM box
lukesvette said: Have you tried a carb heat shield?
No have not, will look at that option, thanks.
Tommy
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On my 68 BB I install 2 spal fans (7") on the frame to pull heat out of the engine compartment. So before I start the car when it's hot outside I run the fans for 30 seconds or so & it starts right up.
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http://i241.photobucket.com/albums/ff53/knotacareL88/Corvette/5LookingupPassside.jpg
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|UPDATED|6/18/2012 2:21:57 PM (AZT)|/UPDATED|
Former Member
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Frederick, MD - USA
Joined: 9/8/2003
Posts: 3398
Vette(s): 1969 convertible L71 427/435 4-speed black interior
You may be experiencing fuel percolation in the carb due to the underhood heat. A spacer may help but hood clearance is already tight on a C3. Re-routing the fuel line might help as well or wrapping it with heat resistant material.
Your running temps seem about normal like everyone else seems to agree. The '78 L82 I used to own ran between 195-210 degrees with the occasional spike in extremely hot and humid weather or standing in heavy traffic.
My '69 427/435 seems to be an anomaly for big blocks...it runs in the 180 degree area in all but hot and humid weather while sitting in traffic...I still have flashbacks of driving it in a parade in 100 degree heat...the temp needle sweeping further and further right and the smell of the clutch. No more parades for that car!
As far as installing a lower temp thermostat...it won't make a difference. That just determines at what temperature the 'stat opens...not a limit on what temp the engine will reach. If a car is overheating with a 195 degree thermostat, installing a 180 degree 'stat will only allow it to take a little longer before it overheats. It establishes a temperature floor, not a ceiling.
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Rochester, NY - USA
Joined: 6/12/2012
Posts: 95
Vette(s): 1980 L- 82 fully restored and upgraded.
I run a solid 180 . all the time .. This is because I run a 4 core rad with a 180 t-stat .
1980 , ZZ430 , 3.92 rear , 700R4 2400 stall NEW EZ EFI
Hey Tom, just saw your post here and decided to go for a "ride" down I-40. Changed the timing this morning according to Lars' papers and just had to try it out. Anyway, my temps ran about 170 running the hwy. Speeds were around 70-75. Once I got back home and shut her down it went up to around 190. Fired it up to put it away for the night and it dropped right down. Even around town it rarely gets above 180.
I went with an aluminum radiator a couple of years ago and never see the temp. go any higher than 180.
I always put the hood up when I first park it so as to protect the paint on the hood from engine heat. I agree that it must help with restarts, too.
Kevin
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Stanley, NC - USA
Joined: 8/9/2010
Posts: 91
Vette(s): 1981, dark blue w/carmel interior. 350 stock, auto tranny, Q-jet carb, ECM box
procketus said: Hey Tom, just saw your post here and decided to go for a "ride" down I-40. Changed the timing this morning according to Lars' papers and just had to try it out. Anyway, my temps ran about 170 running the hwy. Speeds were around 70-75. Once I got back home and shut her down it went up to around 190. Fired it up to put it away for the night and it dropped right down. Even around town it rarely gets above 180.
Steve the issue is not water or engine oil temps too high but the buildup of heat under the hood once stopped. Since my '81 still has all parts as came off the assembly I have an engine compartment full and very little open space for heat to get out so the radiant heat buildup is what is kicking me......so for now after getting hot and stopping, when can pop the hood and let the heat escape.....until a better idea comes along.
Tommy
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
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I know guys that used to drive around all day with the hoods unlatched on Shark cars....and that was back when they were still kinda NEW! All due to the heat.
I always pop the hood release on mine if I am parked for more than a few minutes, and it stays unlatched all the time while in the garage.
You think yours get hot under there? Try working on a big block!!!
I always pop the hood release on mine if I am parked for more than a few minutes, and it stays unlatched all the time while in the garage.
You think yours get hot under there? Try working on a big block!!!
Joel Adams
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Overland Park, KS - USA
Joined: 7/9/2003
Posts: 914
Vette(s): 1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.
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Make sure that all of the foam seals around and above the radiator are intact and in place and if it still has a fan clutch, ensure that it is functional.
1973 L-82 4 spd
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Oak Creek, WI - USA
Joined: 5/21/2008
Posts: 1965
Vette(s): 1981 Great White Shark. Red Interior, 350/190 hp. PS, PB (SS), A/C CC, T-Tops. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vettes Car Club. 175,000 Original miles!! Now own a 1998 C-5!
Adams' Apple said: I know guys that used to drive around all day with the hoods unlatched on Shark cars....and that was back when they were still kinda NEW! All due to the heat.
I always pop the hood release on mine if I am parked for more than a few minutes, and it stays unlatched all the time while in the garage.
You think yours get hot under there? Try working on a big block!!!
I always pop the hood release on mine if I am parked for more than a few minutes, and it stays unlatched all the time while in the garage.
You think yours get hot under there? Try working on a big block!!!
Oh, now I get it!! Its an in-bread cat!!!
in Forum: C3 Engines
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