Drag Racing Discussions > Front Engine Dragsters

cooling question

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crider:
Well I'm not 100% certain all the air is out, but I'm pretty sure. I have ran the pump with the engine off for over half an hour, I would think that would have worked all the air out. It circulates great as long as it is full to the very top. Filler cap on the intake. it will push about a half pint out of it into the overflow jug once it get's up to temp. Using a 15lb cap. would a higher  pressure rad cap help maybe? New engine is going to be on methanol if the machinest ever gets my block ready for me, hopefully that wil cure all my cooling issues, but I'd like to be able to have a little bit of fun with this old boat anchor until then

fuel749:
Are you driving to the staging lanes and driving back?

MikenMpls:
Similar to a road vehicles cooling system the only way to keep air out (once purged) is to make sure that there is a "recovery tank" with fluid in it. This way when the engine cools and the fluid contracts it will pull fluid from the recovery tank into the engine and not air from somewhere else. Otherwise you will have to purge every expansion/cooling cycle.

crider:
Yes, drive to lanes and return

Scott Krieger:
Crider,
Yes on the cap.
We tried a 12lb cap (Seemed stouter) from a 16lb cap after changing out radiator lines. Puck tank started filling up after every pass. After that race grabbed the 16lb cap out of the trash can put it back on, along with a zip tie. Problem solved.

I think that Meziere safety cap is the way to go. I put off getting one when I first seen one a couple months ago. But will be ordering one today now that you got Me thinking about it. Cheap safety in the long run for $100 in this department and last forever. 

Thank's
Enjoy

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