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Re: Superbird Overheats
[Re: Bayou_Bird]
#1036995
07/21/11 01:43 AM
07/21/11 01:43 AM
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Joined: Jan 2003
Posts: 31,050
Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,050
Oregon
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A lot of things can be done before you add a pusher fan. For a street car you should overdrive the water pump. It eats up more power, but losing a few hp is better than cooking the motor.
You'll also want the best water pump you can buy as well as high quality hoses and belts. Make sure the radiator is the biggest one available for that make and model. Use a factory shroud and the biggest clutch fan that you can fit in there. Late model C body cars had huge fans so if one of those will fit use it.
The temp of the thermostat doesn't really matter on keeping things cool. What you need to do is run as much water thru the engine and radiator as possible. So speed up the water pump, make sure there isn't any resistance in the hoses or radiator and then hope for the best.
Pure water works the best but if there is a possibility of freezing then run a little bit of anti-freeze in the system. The closer you are to pure water the better. Also, run a high pressure radiator cap but make sure your hoses and radiator are in good shape before you do that.
And of course, make sure the engine is properly tuned. Advancing the ignition will probably cool things down. Also, make sure the carb is jetted properly.
Last edited by AndyF; 07/21/11 01:44 AM.
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Re: Superbird Overheats
[Re: Bayou_Bird]
#1036997
07/21/11 02:29 AM
07/21/11 02:29 AM
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Joined: Dec 2007
Posts: 18,157
Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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A simple test for your Superbird's air drawing efficiency,is with the engine running at idle, place a piece of what copy paper in the center of the grille, if it stays in place, your drawing enough air thru the grille, if the paper dose not remain in place and falls off, then start with the following:
The cooling needs of the wingcar are a little bit more involved, is the car fitted with a 26" radiator?, do you have a spring in the lower hose to keep it from collapsing at higher RPM's?, how many rows in the radiator?....are the upper and lower wingcar foam seals for the radiator in place?, what about the rubber air seals, all 10 of them, including the K frame seal, are they in place, and properly installed, as they create a funnel, or path way for the fan to draw air from the cone grille opening,...a shroud is a must, with at least 50% of the fan inside the opening,...if you have a flex fan, ditch it, clutch fans are useless as well, even the factory recalled early released 70 Bird models due to overheating, to be retrofitted with a solid blade fan, all further production models were solid blade fans,....a good antifreeze mix is ZEREX G-05,...50/50 mix with water, and 8-10oz of REDLINE WATER WETTER,....if your replaceing the radiator, I'd recommend a 5 row micro tube core,...
Mike
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Re: Superbird Overheats
[Re: DAYCLONA]
#1036998
07/21/11 08:50 AM
07/21/11 08:50 AM
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Joined: Aug 2003
Posts: 8,828
Houston, Tx
hemi68charger
master
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master
Joined: Aug 2003
Posts: 8,828
Houston, Tx
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Quote:
A simple test for your Superbird's air drawing efficiency,is with the engine running at idle, place a piece of what copy paper in the center of the grille, if it stays in place, your drawing enough air thru the grille, if the paper dose not remain in place and falls off, then start with the following:
The cooling needs of the wingcar are a little bit more involved, is the car fitted with a 26" radiator?, do you have a spring in the lower hose to keep it from collapsing at higher RPM's?, how many rows in the radiator?....are the upper and lower wingcar foam seals for the radiator in place?, what about the rubber air seals, all 10 of them, including the K frame seal, are they in place, and properly installed, as they create a funnel, or path way for the fan to draw air from the cone grille opening,...a shroud is a must, with at least 50% of the fan inside the opening,...if you have a flex fan, ditch it, clutch fans are useless as well, even the factory recalled early released 70 Bird models due to overheating, to be retrofitted with a solid blade fan, all further production models were solid blade fans,....a good antifreeze mix is ZEREX G-05,...50/50 mix with water, and 8-10oz of REDLINE WATER WETTER,....if your replaceing the radiator, I'd recommend a 5 row micro tube core,...
Mike
The only difference for me is I didn't put the 50/50 in. In my situation, I have filled the complete cooling system with distilled water and a bottle of Redline Water Wetter. My Daytona has been retrofitted with a solid fan (they all came with the clutch-type - Plymouth learned their lesson via the Daytona and early 'Birds to replace it with a solid fan like Mike stated). I have all my seals in (thanks Mike). I also have the radiator-2-core support foam seals too. My Daytona ran terribly hot when I first got her. Now, she is a LOT more driveable. Of course, the temps steadily increase with stop-n-go traffic, but I have since put a pusher fan on the car. I actually haven't had to use it yet for she cools so much better. Added insurance on these hot Houston days and it's totally hidden under the latch tray. Knowing your radiator is at top performance is a must. I'll probably change out the coolant with the Xerex G-50 and distilled water at 50/50...
Good luck...
Troy
Last edited by hemi68charger; 07/21/11 08:51 AM.
TroyHouston Mopar Connection Club'69 Charger Daytona 440 - auto - 4.10 Dana (now with 426 hemi) '69 Charger 500 440 - 4speed - 3.54 Dana '70 Road Runner 383 - 4speed - a/c (now with 440)
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Re: Superbird Overheats
[Re: Bayou_Bird]
#1037000
07/21/11 09:40 AM
07/21/11 09:40 AM
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Joined: Jan 2003
Posts: 1,043
Slidell, La.
doctor_mopar
super stock
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super stock
Joined: Jan 2003
Posts: 1,043
Slidell, La.
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There are some good sugestions made here Steve. Note that the flex fan was a step in the wrong direction, as they are not known to cool that well. The suggestion that as close to pure water as you can run, and add water wetter , is an easy thing to do. If you do add anti freeze, keep it to a minimum in the system.
------------------------ It doesn't matter what you do.........As long as you look good doing it !
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Re: Superbird Overheats
[Re: Bayou_Bird]
#1037002
07/21/11 10:21 AM
07/21/11 10:21 AM
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Joined: Jan 2003
Posts: 75,060
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,060
U.S.S.A.
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Quote:
Thanks for the advice. I will do the copy paper test this evening. The radiator is original 26" with all seals in place. Including radiator to shroud seal. Does have the shroud so air flow should be as designed. Was restored all original (and radiator recored) about 6 years ago but only has about 300 miles since resto. I don't know if the hoses has springs in them but they do not collapse as I have inspected them at idle after reaching 230 degree gauge temp. At idle, I put the heat sensor gun after running to gauge temp of 230 and this is what I have...top hose reading 213, bottom hose reading 210, sensor reading on engine 220. I do not know much about mechanics but my "red flag" about the problem is that when I can reach 45 mph and stay at that speed or greater, I cool back down to about 195-200 degrees. Thanks and I will let you know what happens with the copy paper test.
grab the lower hose and squeeze it , engine not running , you should be able to feel the spring . But to test if it's sucking closed you need the to bring the RPM up , it shouldn't suck closed at idle , if it does you have a huge restriction .
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Re: Superbird Overheats
[Re: can.al]
#1037007
07/21/11 03:57 PM
07/21/11 03:57 PM
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Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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Quote:
top hose 213...bottom hose 210
...you don't have enough rad
Original Superbird radiator is 26" three core,if it is clean,he has enough radiator. 
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Re: Superbird Overheats
[Re: 62maxwgn]
#1037008
07/21/11 04:05 PM
07/21/11 04:05 PM
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Joined: Aug 2003
Posts: 8,828
Houston, Tx
hemi68charger
master
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master
Joined: Aug 2003
Posts: 8,828
Houston, Tx
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Quote:
Quote:
top hose 213...bottom hose 210
...you don't have enough rad
Original Superbird radiator is 26" three core,if it is clean,he has enough radiator.
Maybe the coolant isn't staying in the radiator long enough? i.e, water pump is moving the water too fast in the radiator and there's not enough time for the heat transfer to occur? Just thinking about loud........
TroyHouston Mopar Connection Club'69 Charger Daytona 440 - auto - 4.10 Dana (now with 426 hemi) '69 Charger 500 440 - 4speed - 3.54 Dana '70 Road Runner 383 - 4speed - a/c (now with 440)
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Re: Superbird Overheats
[Re: Viol8r]
#1037010
07/21/11 04:19 PM
07/21/11 04:19 PM
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Joined: Aug 2003
Posts: 8,828
Houston, Tx
hemi68charger
master
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master
Joined: Aug 2003
Posts: 8,828
Houston, Tx
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Quote:
Can we start with some basic stuff like initial timing and tune before we have this guy rebuild his entire cooling system??!
I believe there's a level of expectation here... But, you are correct..
I think most of us are giving examples of what we went through... I'm sure he can digest what we say versus what he's done.
But, with that being said,
carb?
distributor?
timing?
rear gear ratio?
TroyHouston Mopar Connection Club'69 Charger Daytona 440 - auto - 4.10 Dana (now with 426 hemi) '69 Charger 500 440 - 4speed - 3.54 Dana '70 Road Runner 383 - 4speed - a/c (now with 440)
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Re: Superbird Overheats
[Re: hemi68charger]
#1037011
07/21/11 08:06 PM
07/21/11 08:06 PM
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Joined: Jan 2003
Posts: 543
Indiana, Just Off I-70
BradD
mopar
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mopar
Joined: Jan 2003
Posts: 543
Indiana, Just Off I-70
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Is the lower valance on the car? If not, it needs to be or most of the air will travel through the grille and out the valance opening instead of through the radiator.
Brad
Check out the Dorn's 69 Barracuda "Switchblade" in the Nov.2010 MCG
Check out the Dorn's refurbished 36 Ford in the Feb.2011 Street Rodder
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