Intercooler needs fan?

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chico929

New Member
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171
Location
Norwich Norfolk
Right, I tried to get this answered in another associated thread but it got lost, so here goes again.
I will, after weighing up the pros and cons on the forum, be imminently removing the viscous fan. Before I do, I`d like to know if the very large intercooler fitted by the previous owner, will be effected in any way.
Anyone out there who knows about these things please?
 
Is that a calibrated "very large", a Landy "very large" or a Mitsumi "very large"? It really depends on the air density and relative difference in air flow over the "very large" intercooler and the "standard" intercooler. You will find that the need for a "very large" intercooler is proportional to the maximum speed of the 300Tdi engine compared to the bodystyling associated with it.

I hope that helps.
Merry Christmas
George
 
chico929 said:
Right, I tried to get this answered in another associated thread but it got lost, so here goes again.
I will, after weighing up the pros and cons on the forum, be imminently removing the viscous fan. Before I do, I`d like to know if the very large intercooler fitted by the previous owner, will be effected in any way.
Anyone out there who knows about these things please?
Click to expand...

It will make [ ] this much difference. Only when your driving with some speed do you really work the intercooler. At such time the air flowing into the grille naturally will do the job. The viscous fan would probably have little impact on the air flow over the intercooler anyway.

Its common practice for race cars (Both purpose built and road car derived) to omit the fan. Its only any use to stop the car overheating in traffic, or when there is low ambient air flow such as when off roading.

I have no idea what point MHM was trying to make?? :confused:(No offence to MHM)

Hope this helps
Chur
 
The point, kind sir, is " wot the fook is 'very large'l?
If the intercooler is four foot square, then no a fan aint required, if it is "very large" and mounted where there is no airflow then yes a fan would help. It is a pointless question! Without knowledge of how large "very large" is and not knowing how and where it is mounted, its like saying " my engine makes a funny noise - wot is it?".
You have said he doesnt need a fan - there is no way you, or anyone else, can answer that Q.
Is that enuf explaination? A stoopid Q gets a stupid A.
 
The Mad Hat Man said:
The point, kind sir, is " wot the fook is 'very large'l?
If the intercooler is four foot square, then no a fan aint required, if it is "very large" and mounted where there is no airflow then yes a fan would help. It is a pointless question! Without knowledge of how large "very large" is and not knowing how and where it is mounted, its like saying " my engine makes a funny noise - wot is it?".
You have said he doesnt need a fan - there is no way you, or anyone else, can answer that Q.
Is that enuf explaination? A stoopid Q gets a stupid A.
Click to expand...

:rolleyes:
Assuming the intercooler is mounted in the standard place, then its pretty safe to assume that it will be ok for the reasons stated in my previous post. Not sure where else you would mount it to be honest?? And i am yet to hear of an intercooler that works from a viscous fan.

Regards
Chur
 
Chur said:
:rolleyes:
Assuming the intercooler is mounted in the standard place, then its pretty safe to assume that it will be ok for the reasons stated in my previous post. Not sure where else you would mount it to be honest?? And i am yet to hear of an intercooler that works from a viscous fan.

Regards
Chur
Click to expand...

Assume? yu cant assume anything - the OP aint given enuf info and he didnt say the intercooler worked from a viscous fan. If we are to make an assumption :rolleyes: then we can assume he was asking if the lack of viscous fan would affect the airflow through an intercooler.
 
The Mad Hat Man said:
If we are to make an assumption then we can assume he was asking if the lack of viscous fan would affect the airflow through an intercooler.
Click to expand...

Understood.. look at the bold bit below...



chico929 said:
Right, I tried to get this answered in another associated thread but it got lost, so here goes again.

I will, after weighing up the pros and cons on the forum, be imminently removing the viscous fan. Before I do, I`d like to know if the very large intercooler fitted by the previous owner, will be effected in any way.
Anyone out there who knows about these things please?
Click to expand...


I replied to the bit in bold with..

It will make [ ] this much difference. Only when your driving with some speed do you really work the intercooler. At such time the air flowing into the grille naturally will do the job. The viscous fan would probably have little impact on the air flow over the intercooler anyway.

Its common practice for race cars (Both purpose built and road car derived) to omit the fan. Its only any use to stop the car overheating in traffic, or when there is low ambient air flow such as when off roading.


Seems relatively straightforward to me.
I still dont understand your point.
 
Unless we know how much affect the viscous fan had, how can we make a valid decision as to how much removal will affect it?

I am still bemused by your contradictory statements below....

Chur said:
Only when your driving with some speed do you really work the intercooler.
and
Its only any use to stop the car overheating in traffic, or when there is low ambient air flow such as when off roading.
Click to expand...
 
The Mad Hat Man said:
Unless we know how much affect the viscous fan had, how can we make a valid decision as to how much removal will affect it?

I am still bemused by your contradictory statements below....
Click to expand...

Sigh.... youre a clown.
There is no contradiction. A viscous fan only has any effect on anything (engine temp, which is it function)at very low ambient air flows.

I stand by my comment that a viscous fan has little or no effect on an intercooler. Think about its position and function.

I'm now getting paranoid about getting accused for trolling!
 
Last edited:
The Op need to fit a cone shaped scoop with a front leading area of 650,000mm2 and a air flow of 6901ltr/min. If he can achieve this then the Fan will be redundant.

Merry Xmas Red Pavee Esq..
 
redhand said:
The Op need to fit a cone shaped scoop with a front leading area of 650,000mm2 and a air flow of 6901ltr/min. If he can achieve this then the Fan will be redundant.

Merry Xmas Red Pavee Esq..
Click to expand...

How did you work that out?
 
Chur said:
Sigh.... youre a clown.
A viscous fan only has any effect on anything (engine temp, which is it function)at very low ambient air flows.

I stand by my comment that a viscous fan has little or no effect on an intercooler. Think about its position and function.

I'm now getting paranoid about getting accused for trolling!
Click to expand...

lol - resorted to name calling, have we?

yes a viscous fan only has an effect at low natural air flows, because it is intended to pull more air through the radiator(s), but only when the viscosity thickens (ie the engine gets warm).

I have thought about its position and function - can you tell me where the OP has mounted the Intercooler? - No - then you cannot determine what, if any affect, the viscous fan will have. I would tend to agree with your comments as being generally correct, however my beef is with the OP who asks a Q which cannot be answered without more info - not you, who has tried to answer, but without sufficient info to be able to accurately.

Trolling - nar - we is having a healthy discussion :D.
 
redhand said:
Bloody didn't I used the amazing power of my brain and my boundless knowledge of Flow dynamics to arrive at that highly scientific figure.


Aw Bollix no I din't. I just made it up. :doh:
Click to expand...

So what does this "cone" do when stationary?
What does it do when moving?
How does it achieve the flow rate?

I suspect you just worked out the flow of the fan.
 
behind the truck cab - like some off roaders?

Stormer12.jpg


can you be certain its not mounted there?
 
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