i have a TE04H on my Z6, i have heard conflicting things about running coolant to it. should i do it or not?
and also, when i'm on the highway the car runs very hot, would i get better cooling if i used a teg full size radiator or a thicker aluminum half size one.
Wow dude, if you go back about a month you'll see me running through these same issues.
The car runs fine and stays cool at idle but at highway it runs too hot right? In my case, the FMIC filled the opening in the bumper AND the stock radiator was suffering from major fin separation. I replaced the stock piece of s**t radiator with an all aluminum direct bolt in, so it's still half-wide. It works flawlessly. The car never goes above the normal temp. I have ran it over 90 for a few minutes and also let it sit still and always the same. The stock fan is sufficient. My only further upgrade to cooling may be an 8" fan on the back of the FMIC to just get more air through and help with off-the-line heat soak.
I never heard bad things about running coolant to the turbo, so I did it to mine. I took out that mess of pipes that runs from the valve cover to the stock intake pipe and from the head to the FITV. Now, I just use a breather filter on the valve cover. I am not sure of the flow direction, but I am either going from the head to the turbo and back to the FITV or the reverse of that.
Since then, I have not noticed any difference other than the car reaching operating temperature faster. I think it is alot better for the engine because of the following-
First, the only things cooling the turbo directly (before coolant lines) are the air going through it and the oil going through it. Now, we do not want the air getting hot because even though the FMIC cools it, the less heat we introduce to it the better. We really don't want the oil getting that effing hot because it just breaks it down faster.
Second, The less direct thing cooling the turbo is conduction of heat through the manifold to the head. This is a slower process but once it gets hot it stays hot and only the oil through the valvetrain and coolant in passages can carry this heat away. It is slower to heat this way and it is also slower to cool this way.
Introducing a cooling passage to the turbo keeps the heat from needing to conduct (or is it convect?) through the pipes to the head, thus keeping the manifold 'a little' cooler and keeping the aluminum head 'a little' cooler. Mainly, the turbo operates slightly cooler which means the oil doesn't see as much heat and thermal breakdown which should be good for the rest of the engine. We all know we want the engine warmed up properly and evenly but we don't want it too warm.
Word.
sorry to babbbabbbabbababalle
B
