Got a GTS-T race car with an RB26 twin turbo engine pushing 520bhp. Engine is new, almost stock and mapped with AEM. It runs really well, very responsive and has no fuelling issues, mixture is a bit rich too to keep it cool.
However it does get really hot after 7-8 laps. Water temps go over 120c and it boils over. Weater was hot though, 25c plus, but I had 2 electric 11inch fans switched on through out the race on the radiator. This is annoying as I have to slow down.
The tracks here are short and bendy so you dont really get longish straights to provide lenghty spells of cool air through the radiator.
I have a Koyo radiator and large oil cooler. I will try to create a shroud for the radiator to focus airflow better and have ordered a cooling panel to help that too. Coolant is normal high quality stuff.
What are peoples experiences with RB26 engines and hard track work?
Btw - dont think its the headgasket, perhaps the thermostat is a little sluggish and the radiator lid is leaky. But is that enough to cause this?
I am running Catrol Motorsport 10w/60 oil which is possibly too thick, so will try and change to 5w/40 before the next outing. That might help too.
Appreciate your thoughts.
Cheers
However it does get really hot after 7-8 laps. Water temps go over 120c and it boils over. Weater was hot though, 25c plus, but I had 2 electric 11inch fans switched on through out the race on the radiator. This is annoying as I have to slow down.
I have a Koyo radiator and large oil cooler. I will try to create a shroud for the radiator to focus airflow better and have ordered a cooling panel to help that too. Coolant is normal high quality stuff.
What are peoples experiences with RB26 engines and hard track work?
Btw - dont think its the headgasket, perhaps the thermostat is a little sluggish and the radiator lid is leaky. But is that enough to cause this?
I am running Catrol Motorsport 10w/60 oil which is possibly too thick, so will try and change to 5w/40 before the next outing. That might help too.
Appreciate your thoughts.
Cheers