Zantus Design
New Member
This has probably been discussed, but I've searched and haven't found the answers I'm looking for.
When I got my hilux from the guys who did my 1UZ-FE conversion, the heat was fine onroad, but as soon as I went offroad it started to get hot. They then replaced the first radiator with one from a 730 BMW. It was much better, but still warmed up once in a while. This radiator had a 14" puller electric fan on the inside and a 10" pusher on the outside of an unknown brand and unknown CFM performance.
I then broke an engine mount which also ripped the radiator apart and I decided to go bigger on the radiator and went for the biggest BMW radiator I could find.
I didn't have time to do the work myself and a friend did the mods to make the new radiator fit. At the same time I wanted to fit the aircon condensor which dissapeared during the original conversion. Since there is no space in front of the radiator, 2x12" fans were fitted on the inside. Unfortunately my friend didn't pay attention and the fans sit about 10mm away from the radiator. These 2 fans deliver a total of 1600CFM.
Now my problem is that the cooling is much worse than with the smaller radiator and the previous fan set-up.
It's fine while I'm driving above 20-30km/h and the fans never come on, but as soon as I start driving slow offroad and labouring the engine, the temp climbs and doesn't drop after at least 10-15 minutes of idling.
The condensor only covers 60% of the radiator and is not in use yet, so that will make things worse when that gets connected and used.
I've looked at fans from all over the world and the best performance I can get is with a combination of a 17" and 2x8" fans which will give a total of 3600CFM. Plus I can add 2x8" fans to the bottom half of the condensor which will push 800CFM of air through that.
Now thw question is, should I invest in the better fans and mount them properly against the core with some rubber seals around the enge, or do I need an even bigger radiator?
Please help!
Thanks
When I got my hilux from the guys who did my 1UZ-FE conversion, the heat was fine onroad, but as soon as I went offroad it started to get hot. They then replaced the first radiator with one from a 730 BMW. It was much better, but still warmed up once in a while. This radiator had a 14" puller electric fan on the inside and a 10" pusher on the outside of an unknown brand and unknown CFM performance.
I then broke an engine mount which also ripped the radiator apart and I decided to go bigger on the radiator and went for the biggest BMW radiator I could find.
I didn't have time to do the work myself and a friend did the mods to make the new radiator fit. At the same time I wanted to fit the aircon condensor which dissapeared during the original conversion. Since there is no space in front of the radiator, 2x12" fans were fitted on the inside. Unfortunately my friend didn't pay attention and the fans sit about 10mm away from the radiator. These 2 fans deliver a total of 1600CFM.
Now my problem is that the cooling is much worse than with the smaller radiator and the previous fan set-up.
It's fine while I'm driving above 20-30km/h and the fans never come on, but as soon as I start driving slow offroad and labouring the engine, the temp climbs and doesn't drop after at least 10-15 minutes of idling.
The condensor only covers 60% of the radiator and is not in use yet, so that will make things worse when that gets connected and used.
I've looked at fans from all over the world and the best performance I can get is with a combination of a 17" and 2x8" fans which will give a total of 3600CFM. Plus I can add 2x8" fans to the bottom half of the condensor which will push 800CFM of air through that.
Now thw question is, should I invest in the better fans and mount them properly against the core with some rubber seals around the enge, or do I need an even bigger radiator?
Please help!
Thanks