Trying to reduce under bonnet temp
Posted: May 22nd, 2014, 8:51 pm
Hello all
I run my Uno turbo Mk2 on the road and at sprints and hillclimb.
I would like advice on the two following possible modifications.
1) Reducing the running coolant temp by way of a alloy racing radiator and thermostat controlled fan. Standard thermostat begins to open 80-84degC - Fully open 96degC - Fan cut-in 90-94degC - Fan cut-out 84-89degC
The reduced under bonnet temp would aid more efficient combustion by reducing inlet manifold temp, another benefit of this reduced temp would be that more boost could be applied. This is just my very simplistic logical mind making these assumptions hence my putting this to all you boffins...
2) Running the fan to suck air out of the engine compartment rather than in.
As the standard fan only runs when at a stand still, in very slow traffic or when queuing at the sprints and hillclimbs, having the hot air sucked out would keep the under bonnet temps down. Again, I stand to be corrected!
Thanks
Slim
I run my Uno turbo Mk2 on the road and at sprints and hillclimb.
I would like advice on the two following possible modifications.
1) Reducing the running coolant temp by way of a alloy racing radiator and thermostat controlled fan. Standard thermostat begins to open 80-84degC - Fully open 96degC - Fan cut-in 90-94degC - Fan cut-out 84-89degC
The reduced under bonnet temp would aid more efficient combustion by reducing inlet manifold temp, another benefit of this reduced temp would be that more boost could be applied. This is just my very simplistic logical mind making these assumptions hence my putting this to all you boffins...
2) Running the fan to suck air out of the engine compartment rather than in.
As the standard fan only runs when at a stand still, in very slow traffic or when queuing at the sprints and hillclimbs, having the hot air sucked out would keep the under bonnet temps down. Again, I stand to be corrected!
Thanks
Slim