21-09-2022, 07:23 AM
Hi all, many thanks for the replies
After scrutineering on Friday I had some time to test the flow of the system and add bleed screws to the pipes around the pump. Unless it was bled properly the pump often had an airlock and so I thought that might have been the problem as Ian suggested.
With the radiator removed and the pipes setup to draw water from one large bucket and return it to another, the flow was around 60gph at 1500rpm, rising with more revs.
I did test runs up and down a hilly road on Sat morning to see if it had improved, the air temp was cool (5 degrees) and i couldn't get the rad temp to go over 50 degrees.
We did 5 qualifying laps on Sunday morning before it boiled and the same in the race.
My conclusion is that it needs a deeper rad core & I'll get one made up that sits lower and has an integral header tank.
I don't know if Circuit de remparts invite A7s every year but I would certainly come back again if they did.
The logistics of getting all the race cars and fuel/spares etc into the city centre is a bit fraught but the circuit itself is fantastic and I feel privileged to have been on it (albeit briefly!)
Sam
(aka Dirk73)
After scrutineering on Friday I had some time to test the flow of the system and add bleed screws to the pipes around the pump. Unless it was bled properly the pump often had an airlock and so I thought that might have been the problem as Ian suggested.
With the radiator removed and the pipes setup to draw water from one large bucket and return it to another, the flow was around 60gph at 1500rpm, rising with more revs.
I did test runs up and down a hilly road on Sat morning to see if it had improved, the air temp was cool (5 degrees) and i couldn't get the rad temp to go over 50 degrees.
We did 5 qualifying laps on Sunday morning before it boiled and the same in the race.
My conclusion is that it needs a deeper rad core & I'll get one made up that sits lower and has an integral header tank.
I don't know if Circuit de remparts invite A7s every year but I would certainly come back again if they did.
The logistics of getting all the race cars and fuel/spares etc into the city centre is a bit fraught but the circuit itself is fantastic and I feel privileged to have been on it (albeit briefly!)
Sam
(aka Dirk73)