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Location:
newcastle
Registered:
May 2002
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 intercooler differences
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Wed, 10 July 2002 11:54
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hi guys a question for all the knowledgable people
is it better to have a intercooler 400mm x 400mm core size or an intercooler 200mm x 800mm both coolers are 75mm thick and has to be made from the same large core.
please give reasons for your choices so i can build the best one
possible
also state if this is from your experience or hearsay from on line experiences (ie toymodsweb etc)
please help before i start to build
thank guys & girls
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: intercooler differences
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Wed, 10 July 2002 12:07
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Depends what you are going to fit it in!
If there are parts on the cooler that dont get cool air flowing through them, they will get very warm and act like a heat sink. In turn this will warn the air flowing through the cooler!
This is'nt a great problem, but it should be avoided!
Also the size of the cooler depends on where the inlet and outlet are!
A cooler with the "lets" on the ends would prefrom better if it was longer than if it were wider! I would have a hard time explaining this, but i'm sure you can understand why!
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Location:
newcastle
Registered:
May 2002
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Re: intercooler differences
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Thu, 11 July 2002 11:09
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thanks but i thought i would have received a few more by nowso i suppose i should wait a bit longerfor more replies see what everybody else has to say
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I supported Toymods
Location:
Perth WA
Registered:
May 2002
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Re: intercooler differences
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Thu, 11 July 2002 12:49
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The website for ARE goes on about intercoolers
http://www.are.com.au/
It makes some valid points that the end tanks are important in airflow too.
And much is said in Corky Bell's book "Maximum Boost" (which is quite easy to read).
The longer the path for the air to travel, the more time it has to lose heat going from the hot turbo end, to the cool inlet manifoldend, so that it can ultimately become cooler.
The greater the cross sectional area of the core (thickness of core X vertical height in a front mount), the less resistance that the air has to get to the other tank (i.e. the lower pressure drop).
The thicker the core, the more resistance there is for air to pass through the core and get to your radiator (depends on tube spacing and fins).
Basically - I dunno - get the biggest one that will fit.
Or, you can model your sizes on a name brand who hopefully has done some sort of research into packaging/benefits (i.e. HKS)
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Toymods Board Member
I supported Toymods
Location:
Turramurra, Sydney.
Registered:
May 2002
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Re: intercooler differences
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Thu, 11 July 2002 15:46
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What motor is it for?
200x800 iwould be a tricky size to work with, but besides that the main difference is the long one will cool less air more, and the side by side one will flow more air but it won't cool as much.
I would personnaly go for the 400x400, for 1 because it's a better size, and secondlly because it would flow better, and being a fair thickness it sounds like it would do a far job of cooling.
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Location:
Rocky Mountains, Canada
Registered:
May 2002
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Location:
Adelaide
Registered:
June 2002
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Re: intercooler differences
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Thu, 11 July 2002 22:00
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In theory, the taller, shorter core will be better over all due to the fact that that it will keep airflow velocity down-thereby reducing resistance over the longer core (the relationship between velocity and air resistance is not linear-ie 2X the velocity will result in far more than 2X the resistance)-that is assuming the same area of cooler-ie 200X800=400X400.
HOWEVER-thats in an ideal world. Considering that you are't fitting this to a 10 second car, and also that squeezing an 800 mm wide core into the front of most road cars is difficult, the thing that matters for you is which is easier to fit. Pick the one that will fit as the performance difference will be negligible at the sort of flow (and core area) you are probably considering. If you are going to go with the taller core though-a couple of flow splitters in the tanks would be a good idea to distribute the flow a bit better-as a 400mm high tank will not get get very even aiflow-don't consider this a downside though-it's easy to rectify.
Experience-manufacturing custom intercoolers for fellow revheads for the last 3 years and an engineering degree.
cheers
sean
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Location:
newcastle
Registered:
May 2002
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Re: intercooler differences
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Sun, 14 July 2002 09:55
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hi guys thanks this is what i was after,ms-75 when u say that the tanks should have splitters,do u mean that the air should flow in the inlet side about 100mm run into a wall therefore being forced along the cores to flow up the tank on the other side about another 100mm (plate being 200mmm from the bottom)then being forced back along the cores to the original side then 200 to the end,and back to the opersite side for release out the outlet pipe.
if so wouldnt this cause more lag and less boast as the air has been totally turbulated by direction change.
again this is not a 10 second car just a 3tgte,ta22 that is an every day driver although it does travell quite well.
the response has been great this has helped a lot.the general consences is leaning towards the 400 x 400,is that correct or have i read it wrong.
keep up the good work folks
again THANKS
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Location:
Lake Macquarie
Registered:
July 2002
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Re: intercooler differences
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Sun, 14 July 2002 23:57
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Mate, i think what ms-75 is talking abourt is on the inlet to the intercooler at least, in the end tank there are splitters inside to direct some of the air up to the top of the cooler therefore more even airflow accross the whole core.
Now does anyone have some tips on making this?
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I supported Toymods
Location:
Perth WA
Registered:
May 2002
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Re: intercooler differences
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Mon, 15 July 2002 03:16
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Just when you have your end tank fabricated, you specify a metal plate inside it to divide the airflow from the inlet into 2 streams. Half the air goes to the top of the core, and half to the bottom half. I think someone has done studies to see that if the inlet is toward the top of the core, most of the air is forced through the top half, and the bottom of the core gets little flow.
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Location:
newcastle
Registered:
May 2002
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Re: intercooler differences
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Mon, 22 July 2002 10:38
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thanks for the input folks
the reasons for asking are obvious
however no-one has touched on the fact that if i make the 400x400 then it is going to completely cover the radiator so that the motor will actually be running hotter water therefore causing the oil to run hotter and lose viscoity quicker
IS THIS WORTH THE INTER COOLER?
this would increase the chance of problems in my opinion plz correct me if im wrong
is this a issue or am i a worry-wart ?
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