Antalyalogy Nickli Üyeden Alıntı
Stelios , Büyük intercooler lag a sebep olur mu sorularından bıkmış ve gayet mantıklı ve teknik bir cevap vermiş ;
Over the thousands of posts I have read, the same rule keeps coming up:
A big intercooler causes lag.
The only truth in that statement is that a larger air tank takes longer to fill
than a smaller air tank. When you have a small air supply to fill them with.
BUT
Our turbos can produce more than 200bhp, which means they can increase the boost
in a 4-8 liter air tank (such as our intercooler systems, stock or upgraded) within milliseconds.
200 bhp is approx 160g/sec in air mass, which is a lot of air being pumped into the engine!
Air density is 1229g/cubic meter. Which means that in every second that passes, the turbo compresses 130liters of air from the atmosphere into your engine.
And you have an intercooler and intake system with a total volume of 4 to 8 liters.
How many seconds would it take for the turbo to fill it up? Does it matter if it is 4 liters (stock) or 8 liters (upgraded with a big intercooler such as Forge or Cupra) ?
So the actual lag after installing an intercooler is measured in fractions of a second and is barely noticeable, specially on engines which have boost from 1750RPM as stated by the manufacturer.
At 2000rpm, where the THP engine has 250Nm of torque and 50kW of power, the air compressed by the turbo is a lot compared to the total volume of the system.
50 kW = 68hp at the flywheel = 54 g/sec ->
54g/sec / (1229 g / 1000liters) = 44 liters/sec
So the turbo flows 44 liters or atmospheric air per second at 2000rpm.
When this is compressed to 1bar overboost, that becomes 22liters / sec
(twice the boost=half the volume).
And if you have a big intercooler, which means approx 8liters, it will take
8/22 = 0.36 secs to fill up your whole intake system with air.
Hence, a larger intercooler will not cause noticeable lag in your system.
Is that enough to say that this MYTH is busted?
I, for one, don't complain for 0.36 seconds of lag compared to the amazing performance
I ** getting in hot weather.
You will be amazed to see the calculations for the exhaust part Wink