Cooling system flow and Rad position
Posted: Sun Apr 14, 2013 7:53 am
I am playing (to use the term loosely) with a 3.5l RV8 from an SD1 which is mounted into a kit car, the rad looks to be from a Ford Sierra and is mounted at about 45 degree angle (top half of rad towards front of car and bottom half towards crank pulley)
When I had the car it looked like it had been running hot or over heating, the previous owner had wired in some flash electric temp probe unter the bonnet mounted to a adjustable relay which switched on the twin electric cooling fans... I have removed all of this and am running a 90 degree temp sensor in the rad (which switches a relay to earth to power fans) and a manual switch in the car to also power the fans if she overheats..
Changing the Carb for a Edelbrock and removing the old top hose it looks like its was air locking as the hose on the SU manifold was higher than the expansion tank, but not sure if it was expansion tank as it had heater retuning through it.... the problem was the top hose never got hot but this expansion / flow through tank was cooking, so with the new Edelbrock the top hose is now coming out at different angle and I am thinking of binning this tank for a proper expansion tank mounted higher up.
My question is if I mount the expansion tank higher than the top hose even though the rad is lower than the top hose water should find its own level to flow.... so the pipe work will go, carb housing top hose to top of rad, bottom hose to waterpump, back of water pump to inlet manifold, back of inlet manifold to heater, heater back to water pump and then add expansion tank with hose feeding the rad or Tee into top hose and a small leak off from expansion tank.... any advice greatly received
When I had the car it looked like it had been running hot or over heating, the previous owner had wired in some flash electric temp probe unter the bonnet mounted to a adjustable relay which switched on the twin electric cooling fans... I have removed all of this and am running a 90 degree temp sensor in the rad (which switches a relay to earth to power fans) and a manual switch in the car to also power the fans if she overheats..
Changing the Carb for a Edelbrock and removing the old top hose it looks like its was air locking as the hose on the SU manifold was higher than the expansion tank, but not sure if it was expansion tank as it had heater retuning through it.... the problem was the top hose never got hot but this expansion / flow through tank was cooking, so with the new Edelbrock the top hose is now coming out at different angle and I am thinking of binning this tank for a proper expansion tank mounted higher up.
My question is if I mount the expansion tank higher than the top hose even though the rad is lower than the top hose water should find its own level to flow.... so the pipe work will go, carb housing top hose to top of rad, bottom hose to waterpump, back of water pump to inlet manifold, back of inlet manifold to heater, heater back to water pump and then add expansion tank with hose feeding the rad or Tee into top hose and a small leak off from expansion tank.... any advice greatly received
