Push or Pull

Captthundarr · December 13, 2011, 10:08:17 AM

During our shke down runs this past weekend we ha a little over heat issue going on. I've got the fan set up to push through the rad. Grill oneping blocked off ( C/GALT) pump rotation is right. did not over heat at the house. any ideas?

Glen · December 13, 2011, 10:21:59 AM

Could be air in the water system, do you have a way to fill and bleed off air.

Dynoroom · December 13, 2011, 10:34:16 AM

What type of water pump do you have?

This issue has quite a bit of info on this site. Do a search...

Stainless1 · December 13, 2011, 10:39:49 AM

check the pressure cap as well

Bob Drury · December 13, 2011, 10:50:53 AM

Most of us who run in the altered classes re-circulate engine water through a on board water tank for that very reason.
On my car I have a 25 gallon tank that engine water goes into before re-entering the radiator. Water enters into the front of the intake manifold water passages and exits out the rear into the tank.
The engine never reaches 190 degrees even on 25% nitro.
I run no fan and the grills are covered. I use a belt driven water pump simillar to the ones Speedway Motors sell.
I preheat the water tank and my oil tank to get near operating temps before each run.
I believe Stainless does the same on his motorcycles with a Bic lighter..........

Bob

Captthundarr · December 13, 2011, 10:54:22 AM

Electric water pump
puke tank
13 lb cap - new

I started thinking, bad idea, that with the grill blocked off that in the push thrrough configuation that the hot air had no where to go and it was pulling hot engine bay air into the rad. I'll search more. tanks

Captthundarr · December 13, 2011, 10:57:44 AM

Quote from: Bob Drury on December 13, 2011, 10:50:53 AM
Most of us who run in the altered classes re-circulate engine water through a on board water tank for that very reason.
On my car I have a 25 gallon tank that engine water goes into before re-entering the radiator. Water enters into the front of the intake manifold water passages and exits out the rear into the tank.
The engine never reaches 190 degrees even on 25% nitro.
I run no fan and the grills are covered. I use a belt driven water pump simillar to the ones Speedway Motors sell.
I preheat the water tank and my oil tank to get near operating temps before each run.
I believe Stainless does the same on his motorcycles with a Bic lighter.......... Bob

Bob, started to think about a water tank as well, could the weight anyway, 32 gal sound like a lot for the Ohio Mile what do you think?

Stainless1 · December 13, 2011, 11:18:16 AM

How large is the heat pump?
You can put in a 32, and run what you need for the shorter events, it does not have to be full. Our Turbo 84 incher runs 5 miles with a little over 5 gallons under 210 degrees.
be sure to internally brace for the pressure... PSI is force in pounds per square inch of surface.

Captthundarr · December 13, 2011, 11:25:11 AM

350ci, know what PSI is thank you

, yep a smaller tank say 25 gal. should do the job and adjust water level to find the happy medium. no plans to head to the salt anytime soon. Too poor like everyone else and job gets in the way. Thank for the food for thought.

WOODY@DDLLC · December 13, 2011, 11:44:10 AM

Quote from: Captthundarr on December 13, 2011, 11:25:11 AM
350ci, know what PSI is thank you , yep a smaller tank say 25 gal. should do the job and adjust water level to find the happy medium. no plans to head to the salt anytime soon. Too poor like everyone else and job gets in the way. Thank for the food for thought.

Just be sure what PSI might do to your wheaties - check Buddies build!

http://www.landracing.com/forum/index.php/topic,8271.345.html

Joe Timney · December 13, 2011, 01:34:15 PM

Pull flows more than a push fan.

kiwi belly tank · December 13, 2011, 02:49:08 PM

It is correct that pull flows more than push but it still needs to be cool air. If you dont have cool air ducted to the rad then its just going to circulate the hot stuff & that wont cut it.
Sid.

Captthundarr · December 13, 2011, 03:01:50 PM

Thanks Woody, couldn't remember which build I saw the tank discussion in and thanks to Sid, Joe and the rest. I just need folks to bounce stuff off of to get my gray matter swim'in.

martysmilt · December 13, 2011, 06:05:23 PM

If you are running a water tank you probably should not pressureize it. I would have a 1.5" vent out the rear of the car just in case you pop a head gasket into the water jacket. Think about what can go wrong with a lot of hot water where it may scald you.

Bob Drury · December 13, 2011, 06:31:41 PM

Marty, thats good advice. I run two 3/4 vents with hot water heater pop offs which exit the car behind the rear tires.
I only put about fifteen gallons in my twenty plus gallon tank.
Another thing to keep in mind is that in a steam (head gasket) situation a round tank is much stronger than a rectangular shape in burst strength.
Bob

News:

Push or Pull