27-09-2013, 05:26 PM
Lower temperature thermostats are only ever delaying the inevitable - you're only ever simply bringing the starting temperature that you start adding heat to the coolant - it's not able to dissipate heat any faster... It'll give you maybe another couple of seconds of on boost time before you bring the temperature to the same level....
This is half the issue with XUDs - you simply cannot remove enough heat from the head fast enough - even if you were to have a MASSIVE radiator - there's a delay between you putting it in the head from burning the fuel, to it going into the water, around the system and into the radiator... Peugeot gave up with Indirect injection even though it's a theoretically better technology because of this issue...
IMO you need a bigger radiator, higher flow water pump and make sure there are NO restrictions in the cooling system... I.e. peoples bodged hoses - the stock hoses seem to be near enough perfect as far as balance goes.
Make sure the thermostat actually works - I think I've had like 5 dodgy thermostats - buy genuine, I now just don't trust motorfactor parts!
This is half the issue with XUDs - you simply cannot remove enough heat from the head fast enough - even if you were to have a MASSIVE radiator - there's a delay between you putting it in the head from burning the fuel, to it going into the water, around the system and into the radiator... Peugeot gave up with Indirect injection even though it's a theoretically better technology because of this issue...
IMO you need a bigger radiator, higher flow water pump and make sure there are NO restrictions in the cooling system... I.e. peoples bodged hoses - the stock hoses seem to be near enough perfect as far as balance goes.
Make sure the thermostat actually works - I think I've had like 5 dodgy thermostats - buy genuine, I now just don't trust motorfactor parts!
