header tank pipe size

[keane]

Hi, could someone do me a favour and measure the size of their pipes exiting from their coolant header tank, I am building a Dax with a Big block Ford V8, just mocking up the tank in 4" ally and need the optimum sizes for the pipes, thanks in advance. dave

[madjohnny]

Dave, have just measured mine on the Dax supplied header tank, 5/8", 5/16" on the main tank body and 1/4" on the filler cap neck.

[keane]

Thanks John, what circumference is the off the shelf Dax item? and what distance from the top of the tank is the 5/16" feed to the therm? thanks for your help. Dave. ps I was going to use 4" tube, 9" long, think that will suffice?

[adricar2]

regarding the header tank , i have made one which is 14 inchs long by 4inch diameter. i have placed a rad cap and overflow on top, and a 1/4 inch connection towards the bottom of the tank , this is connected into the overflow on the existing radiator. i have fiited a cap with no spring on it, this works fine, i only need it to take up the expansion in the water system and also take out any air.

adrian

www.americanv8engines.co.uk

[madjohnny]

The Dax supplied item is 208mm long and 130mm Diameter.

See attached pics for an idea of outlet placement.

[keane]

Thanks John/Adrian, just what I needed to know. Dave