cooling ?

[roger61670]

I need a little help, trying to get my CUDA to run cooler then 200-220 . It has a 496 stroker with a ele. water pump, 2- 10"ele. fans, 2 core alum. rad. could the carb be out of tune,should I put a fan back on the motor, please help if poss. thanks :?:

[etbird]

What is your timing at?

[topsportsman1]

I'd say the radiator is not big enough or its tubes are plugged up.

Do you have a fan shroud on it?

Do you have a thermostat in the engine?

[woodsman]

Roger this may help you just use distilled water and 2 bottles of royal purple purple ice. It cant do anything but help it helped me. Good luck on your cooling system.

[bjuice]

i know your being ask alot and all is good info write it all down on a checklist..i think you will find once you get the right radiator in your car if not already...you will have the problem of moving the water thru too slow or too fast..the cheapest thing you could do right know, is try the coolant thing then check your timing and then check to see what you have in your waterneck housing..get you a thermostate and cut the center out and place it back in place...

for the record my 511ci bbc, runs 37 degress timing, i have a custom made cross flow radiator from karrhouse. 2 one inch rows,,,i run a punched out thermostate and a csr electric waterpump and it doesn't get about 185 degree's after a full pass in 90 degree heat

Brian

[davebat]

Just a thought, after sitting on the shelf, I installed my electric waterpump on my S10 and it was overheating. Used to work fine on my 406. Somehow the thing is just not running right after sitting on the shelf.

[topsportsman1]

Just a thought, after sitting on the shelf, I installed my electric waterpump on my S10 and it was overheating. Used to work fine on my 406. Somehow the thing is just not running right after sitting on the shelf.

I had the same thing happen one time,I swaped the wires and it cools fine now.I figured the impeller was rotating the wrong way.Try reversing the polarity on the pump,as long as you have a two wire pump

[zipper06]

Definately do something in the thermostat housing such as restricting the flow. I use a restrictor washer with a 3/8" hole to slow down the water flow, giving it more time to cool in the radiator, when i run gas. but most of the time i run alcohol where i have no cooling problem.

JMO

Zip.

[roger61670]

Thanks for all the help. the timing is set at 35, there is a t-stat in it with the center out of it, but I do not have a shroud or fenderwells in it yet. I tried setting timing at 30,slowed down and ran like crap. never went anymore on timing since :?: I've only raced the CUDA about 3 times this year do the temp problem, some people say that temp is find, I don't like it. thanks roger

[Bubstr]

This sounds like a core support or duct work would help you a lot. I've found most of the time cooling problems came from letting the air go around the out side of the radiator instead of forcing it to go threw it.

Fans are for when your sitting still or going slow.

I'd bet if you stopped any air entering the front from going around or under or over your radiator, that even a skimpy one would be ok for a drag race.

There are exceptions, like pushing water threw too fast or slow or backward, but most times it's not forcing the air threw at speed.

If your driving it on the street a radiator with more capacity may be needed because of slower air flow. That just allows most of the water to stay in the radiator longer and get cooled.

PS you want air threw all the fins , don't block any or run tube type ducts, and think your getting air. Been there , Ouch I made a shroud for water pump type fan that was very flat against radiator with tunnel for fan. It didn't use the outside corners of the radiator then. When you add them corners up they make up 1/3 of the area.

[woodsman]

Definately do something in the thermostat housing such as restricting the flow. I use a restrictor washer with a 3/8" hole to slow down the water flow, giving it more time to cool in the radiator, when i run gas. but most of the time i run alcohol where i have no cooling problem.

JMO

Zip.

Zip can you confirm that 3/8" was a typo if so I am going to get the little moroso kit that comes with 5/8",3/4" an 1" and use the 5/8" in mine because at the moment I don't have anything in it now.

[etbird]

Well at 35 the timing sounds right on, so I will have to agree with some of the others about air flow or water going thru to fast.

[Timmyboy86]

I’ve been wondering about those electric pumps some guy told me they won't work on the street.

p.s. same person said one lip on the exhaust port kills 25 hp, you need heavy parts to make an engine run on the street, .027 ring gap is worn out "equivalent to 100,000 mile engine" you need .005, stainless rockers are just to heavy you need aluminum "Harland sharps the greatest there is", you can't run a 6 inch rod in a 400 Chevy on the street it won't last past 10,000 miles, main girdles are useless they do nothing, you can't make an 850 cfm carb run with a 750 or a 900, tunnel ram is the only way to go regardless of cubic inch, the one that makes me laugh the most is a .060 over 454 with stock 396 heads flat tops and a cam of 3500-6500 makes 650hp+ will run high 10's easily

[davebat]

Why does a 6" rod in a 400 make it wear out so quickly?

[zipper06]

Definately do something in the thermostat housing such as restricting the flow. I use a restrictor washer with a 3/8" hole to slow down the water flow, giving it more time to cool in the radiator, when i run gas. but most of the time i run alcohol where i have no cooling problem.

JMO

Zip.

Zip can you confirm that 3/8" was a typo if so I am going to get the little moroso kit that comes with 5/8",3/4" an 1" and use the 5/8" in mine because at the moment I don't have anything in it now.

Oop!! sorry 5/8" washer.

Zip.

[woodsman]

Thanks Zip thats what I am going to go with 5/8".