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Location:
sydney
Registered:
September 2003
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interccooler q
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Thu, 13 November 2003 11:47
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guys, im fitting a gtr cooler to my soarer.
my q is , gtr inlet outlet is 78mm or 3 inch.
now the outlet on the 1jz is 60mm from turbos,i was going to use 65mm pipe to the gtr cooler,now should i use 65mm on the outlet to keep faster flow or go to 78mm ?
or any other input would be appreciated
thx
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Location:
Brisbane
Registered:
May 2002
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Re: interccooler q
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Thu, 13 November 2003 11:56
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If the turbo outlet is 60mm, there's no point going any larger than this. You could fit 100mm intercooler pipes if you wanted to, but the air still has to squeeze through that 60mm pipe!
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Location:
Perth
Registered:
June 2002
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Re: interccooler q
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Thu, 13 November 2003 12:05
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Air velocity and air pressure are inversely proportional to each other.
If the turbo outlet is 60mm then going up to 78mm means the air speed will slow but the air pressure will go up.
Faster airflow is great for tourque and I would assume that you will be stepping down again anyway to go through your throttle body.
I would stay at 65mm.
Gabe
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Location:
sydney
Registered:
September 2003
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Re: interccooler q
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Thu, 13 November 2003 12:10
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Thx Norbie, that was what i was thinking also, i had some ppl say i have 65mm into cooler then have 70 or 80 mm on the outlet..
and i think inlet of the tb is 69mm on the stock 1jz...
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Location:
Brisbane
Registered:
May 2002
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Re: interccooler q
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Thu, 13 November 2003 12:21
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| gabe wrote on Thu, 13 November 2003 22:05 |
Air velocity and air pressure are inversely proportional to each other.
If the turbo outlet is 60mm then going up to 78mm means the air speed will slow but the air pressure will go up.
Faster airflow is great for tourque and I would assume that you will be stepping down again anyway to go through your throttle body.
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All of this is relevant when selecting inlet runner size or the diameter of the primaries on your custom extractors, but completely irrelevant when it comes to intercooler piping - especially when the turbo outlet and (presumably) throttle body size are fixed.
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Location:
Perth
Registered:
June 2002
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Re: interccooler q
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Thu, 13 November 2003 12:30
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But intercooler piping directly affects say, the ammount of time the air is inside the intercooler. This is an aspect that definately requires a little bit of thinking to achieve best results.
Thats the main point I was trying to get across 
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Location:
Brisbane
Registered:
May 2002
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Re: interccooler q
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Thu, 13 November 2003 12:36
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No, it affects the amount of time the air spends in the intercooler piping. The amount of time spent in the intercooler itself is determined by the number of tubes in the core and the diameter of each tube. 
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Location:
sydney
Registered:
September 2003
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Location:
Perth
Registered:
June 2002
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Re: interccooler q
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Thu, 13 November 2003 12:57
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| Norbie wrote on Thu, 13 November 2003 20:36 |
No, it affects the amount of time the air spends in the intercooler piping. The amount of time spent in the intercooler itself is determined by the number of tubes in the core and the diameter of each tube.
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From the turbo outlet to the throttle body is, technically a large sealed pipe. Intercooler included. Therefore every pipe size in the run has an affect. How can fast moving air in the intercooler move at the same velocity if it has slow moving air infront of it? Or slow moving air behind it for that matter??
Anyway...... 
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Location:
Brisbane
Registered:
May 2002
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Re: interccooler q
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Thu, 13 November 2003 13:30
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Quite easily, if the pipe diameter changes! Larger diameter = low air velocity, smaller diameter = high air velocity.
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