real intercooler test on the way
Off topic from the thread.... But are you heading out to Bakersfield for the BOTI finals? End of October?
Please say yes, haha
Evolving Member
Joined: Jun 2004
Posts: 371
Likes: 0
From: Australia
From post 328 , why wouldn't he test the same intercooler cores with different end tanks ? The core itself is not a charge air cooler until it has tanks to feed and collect from the cores tubes and how the core is fed is critical if you want it to work properly . I see heaps of intercoolers from all round the world and yet many are a polished piece of junk .
To be effective a charge air cooler has to pass the air necessary to feed the engine without significant resistance to airflow , this is more important initially than the air temp reduction because even if the post IC air temp was at ambient you won't easily get the forced air into the inlet manifold so manifold pressure falls off . Your turbo won't like it much , turbine not turning as fast as it would like so slip losses/exhaust restriction etc etc .
Secondly , to reject heat the air must slow down to the point where its exposed to the inner surfaces of the tubes so that heat transfer can take place . It has to have some turbulence so as to avoid the barrier flow problem hence the "turbulators" in the tubes - radiators and oil coolers have them as well .
The most effective charge air coolers I've seen have tanks top and bottom rather than at the sides (when they are wider than they are tall) so they have more if shorter tubes . All else being equal they have less resistance to airflow through the core because it now has a greater number of the same sized tubes . So you now get the lower velocity through each tube (more time to reject heat) and less pressure drop (flow resistance) overall .
I have to assume that collecting the air from the low pressure drop core is easier because the gas speed is lower out of the tubes so easy to make change direction without additional pressure drop .
I know of at least one firm over there doing such an intercooler but can't remember which make of car it's for - pretty sure its a Mitsy or a Subaru . I did see one built here - must be 7-8 yrs ago for a drag Lancer GSR (built to ~ Evo 3 spec) and intercooler wise it worked well .
My two kangaroo cents worth , A .
To be effective a charge air cooler has to pass the air necessary to feed the engine without significant resistance to airflow , this is more important initially than the air temp reduction because even if the post IC air temp was at ambient you won't easily get the forced air into the inlet manifold so manifold pressure falls off . Your turbo won't like it much , turbine not turning as fast as it would like so slip losses/exhaust restriction etc etc .
Secondly , to reject heat the air must slow down to the point where its exposed to the inner surfaces of the tubes so that heat transfer can take place . It has to have some turbulence so as to avoid the barrier flow problem hence the "turbulators" in the tubes - radiators and oil coolers have them as well .
The most effective charge air coolers I've seen have tanks top and bottom rather than at the sides (when they are wider than they are tall) so they have more if shorter tubes . All else being equal they have less resistance to airflow through the core because it now has a greater number of the same sized tubes . So you now get the lower velocity through each tube (more time to reject heat) and less pressure drop (flow resistance) overall .
I have to assume that collecting the air from the low pressure drop core is easier because the gas speed is lower out of the tubes so easy to make change direction without additional pressure drop .
I know of at least one firm over there doing such an intercooler but can't remember which make of car it's for - pretty sure its a Mitsy or a Subaru . I did see one built here - must be 7-8 yrs ago for a drag Lancer GSR (built to ~ Evo 3 spec) and intercooler wise it worked well .
My two kangaroo cents worth , A .
what about this fmic?>>>http://machevo.com/diyinco.html
This is a good website for evo parts I dont think they will carry Sh** stuff!.....
This is a good website for evo parts I dont think they will carry Sh** stuff!.....
