DeTomaso Mailing List: July 99, Message #384

Write it up for a tech article.

Asa Jay


At 05:14 PM 7/9/99 -0400, Jack Tunnell wrote:
>Hello All,
>
>After seeing Dennis Quella's cooling mod on his race car, I
>decided to try it on my warm running street car.
>
>The mod is to drill a small hole in the back of each head in
>the upper portion of the water jacket.  Tap to accept a pipe
>thread to a 3/16 flare fitting.  Using hard lines with
>expansion loops or flex lines, connect the two head bleed
>ports together and run to the boss on the swirl tank that
>used to hold the temp sensor.  If you have aftermarket tanks
>you will have to weld a fitting into the hard line that goes
>out of the swirl tank.
>
>The concept is that on a std Cleveland a small amount of
>steam is always generated in the heads due to poor flow.
>This adds to system pressure and drives small amounts of
>coolant out the overflow even in the best of conditions.
>
>The results on my car have been dramatic. No overheats and I
>haven't had to add coolant since I did the mod.  That
>includes 2 track days at Parump.
>
>Keith Verges just had the heads off of his Blown Corvette
>and reports that they have a similar system.
>
>More later,
>Jack Tunnell  #3583
>Dallas  972-248-3992  xt 21
>