MSNZ and rearward facing bonnet vents

[bluemaumau]

good discussion in this thread.

how far or close should the i/c be to the radiator ideally?
mines about 10mm lol (car aint running tho)

[darkwolf]

I don't think it would make much difference. I think the problem that has occured here is that the turbo has created more heat. So the heat exchange system is required to provide more support. Because air is effectively bypassing the radiator and entering the engine bay Adoom is suffering from higher temps.

As long as the air flowing past the radiator is enough to keep your radiator cool then there shouldn't be a problem. As the air going past your radiator after the IC will generally be heated anyway.

Just an observation, wouldn't it be better to have the IC mounted higher on the radiator as then it's not heating the end of the radiator closest to the outlet?

Also, what would be the difficulty in while building the aluminium shields putting water jets in there to cool the radiator/IC if it was required. I don't believe in overkill so it seems like a good idea to me.

[~SlideWays~]

From what I've seen and read, there are 2 things to think about. If there is a large gap, the air will exit the intercooler and not have a smooth path to the radiator surface - causing turbulance (spirals) and reducing the radiators efficiency. ie less air flowing through.

But if you have them right up next to each other you run the risk of heat soaking the intercooler from the radiator heat.

[~SlideWays~]

I don't think it would make much difference. I think the problem that has occured here is that the turbo has created more heat. So the heat exchange system is required to provide more support. Because air is effectively bypassing the radiator and entering the engine bay Adoom is suffering from higher temps.

More like the intercooler is blocking air flow to the radiator plus the position of the radiator means that the air is not flowing through, instead it is probably flowing around it.

As long as the air flowing past the radiator is enough to keep your radiator cool then there shouldn't be a problem. As the air going past your radiator after the IC will generally be heated anyway.

The radiator is going to be waaaaaaay hotter than the intercooler.

[darkwolf]

I don't think it would make much difference. I think the problem that has occured here is that the turbo has created more heat. So the heat exchange system is required to provide more support. Because air is effectively bypassing the radiator and entering the engine bay Adoom is suffering from higher temps.

As long as the air flowing past the radiator is enough to keep your radiator cool then there shouldn't be a problem. As the air going past your radiator after the IC will generally be heated anyway.

The radiator is going to be waaaaaaay hotter than the intercooler.

Fair enough. So having it down lower actually advantages the IC so it doesn't soak as much heat as if it was up where the radiator (theoretically - at least to me) would be hotter. Sweet just something I thought of that I'd ask.

More like the intercooler is blocking air flow to the radiator plus the position of the radiator means that the air is not flowing through, instead it is probably flowing around it.

My understanding of it is that normally this practice would be fine. But because the airflow is going around the radiator rather than through the overheating occurs. If he could focus the airflow through the radiator (using the cooling panels) then the over heating problem would disappear and would probably have the added benefit of dropping the charge temperature of the air in the IC.

As I've said before though I'm an accountant, I dabble in mechanics but I'm far from an expert so if I'm mistaken by all means show me the error of my ways. I'm just hoping I've not crossed my wires somewhere.

[~SlideWays~]

I don't think it would make much difference. I think the problem that has occured here is that the turbo has created more heat. So the heat exchange system is required to provide more support. Because air is effectively bypassing the radiator and entering the engine bay Adoom is suffering from higher temps.

As long as the air flowing past the radiator is enough to keep your radiator cool then there shouldn't be a problem. As the air going past your radiator after the IC will generally be heated anyway.

The radiator is going to be waaaaaaay hotter than the intercooler.

Fair enough. So having it down lower actually advantages the IC so it doesn't soak as much heat as if it was up where the radiator (theoretically - at least to me) would be hotter. Sweet just something I thought of that I'd ask.

Your theory would work better if the intercooler was behind the radiator, but also depends on the type of radiator (what the water flow path is). But as I was pointing out, a FMIC is always going to be colder than a radiator so would be silly having the radiator before the I/C.

I think Doom's idea for a vent in the bonnet was just to remove some heat from the engine bay.

Adoom, what about a turbo blanket/beany? Or be a cheap arse liek me and use heat wrap

[~SlideWays~]

Oooooh ohh oohhh I can use my new plasma cutter to cut the alloy sheild thingies!!!

Better not loot my big sheet while Im away...

[Adoom]

I don't think it would make much difference. I think the problem that has occured here is that the turbo has created more heat. So the heat exchange system is required to provide more support. Because air is effectively bypassing the radiator and entering the engine bay Adoom is suffering from higher temps.

As long as the air flowing past the radiator is enough to keep your radiator cool then there shouldn't be a problem. As the air going past your radiator after the IC will generally be heated anyway.

Just an observation, wouldn't it be better to have the IC mounted higher on the radiator as then it's not heating the end of the radiator closest to the outlet?

Also, what would be the difficulty in while building the aluminium shields putting water jets in there to cool the radiator/IC if it was required. I don't believe in overkill so it seems like a good idea to me.

Not allowed water jets on the track. Its considered a leak or something.

[85AW20v]

You could also cut all the plastic bits out of those two fans you've got mounted on the front of the radiator, leaving just the main supports for the fan motors as its quite a bit of surface area. Did that on my brothers rally Starlet and it certainly helped with the cooling.

[matt dunn]

You could also cut all the plastic bits out of those two fans you've got mounted on the front of the radiator, leaving just the main supports for the fan motors as its quite a bit of surface area. Did that on my brothers rally Starlet and it certainly helped with the cooling.

Yes,

and in actual fact at speed any fan at all is a restriction in airflow.

By having a gap between the IC and Radiator, it allows some air that goes around the IC to still go through the radiator.


Get a hair dryer or similar and try to blow air thru the IC fins and put your habd at the back and see how much you can feel,

now try it with a radiator and feel the difference.