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Turbo To Intercooler To Intake

AREBEETHIRTYTURBO
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AREBEETHIRTYTURBO Contributor

AREBEETHIRTYTURBO

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Which would you prefer ???

ATM
turbo to intercooler 140cm + 4 bends
Intercooler to intake 235cm + 5 bends
looks ok

Could be without $$$
turbo to intercooler 180cm + 5 bends
intercooler to intake 165cm + 4 bends
looks less ok

f**k looks, performance matters, but will there be f**k all difference.

Every bit helps.

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AREBEETHIRTYTURBO Contributor

AREBEETHIRTYTURBO

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I would prefer a modern turbo and loads of boost so it sits nicely in the efficiency zone.. at the same time invest in a good intercooler.

This is for now.. a freebie, those things come after rego man.

AREBEETHIRTYTURBO Contributor

AREBEETHIRTYTURBO

Posted
  • Author
Posted

show us what your engine bay looks like...

I would say call up Plazmaman get a Pro Series kit and be done with it.

Like i said its for now, obviously if i had that sort of coin to piss off i wouldnt be asking you guys shit.

How many bends could and intercooler bend if an intercooler could bend bends?

A couple

  • 4 weeks later...
  • 2 weeks later...
GTSBoy Grand Master

GTSBoy

Posted
Posted

Ha. The science in that thread is a bit simplistic. It's great when someone has a little knowledge and then freely misuses it. For example, the quote "0.4 mach is when air becomes turbulent", is a load of shit. The velocity at which an airflow becomes turbulent depends on the velocity AND the characteristic diameter AND the density of the gas. As the diameter of the duct/wing/object is not used to calculate the Mach number, then the statement is false.

In industrial design we try to keep air/gas velocities in ducts down to <30 m/s, and often less. That is unless we have lots of free pressure available, in which case we may let it creep up. But the flip side of velocity is noise, and we also need to stay away from the erosional velocity. People likely don't care about that (noise and wear) in aftermarket automotive applications, so the point may be moot.

But a quick and dirty calculation for 400HP worth of air at 1 bar boost pressure and 50°C in duct temperature shows that a 2" pipe will have velocity <90 m/s, a 2.5 obviously a bit less and a 3" pipe is going to be going down into the <50 m/s region. That's a long way from the 0.4 Mach silliness that was posted in the linked thread. By the same token, there's nothing to say that 400HP at those air conditions is pushing the limits of a 2" pipe anyway. Or maybe it is. It will all depend on how much boost pressure you have to waste and how much consequent exhaust manifold pressure you can put up with - which is all specific to the engine and turbo combo that there is no blanket answer. The best bet would be to do some calculations for some actual engines that have been shown to hit the wall and have then had the pipes changed and shown an improvement. Any other calculations (like mine above and all the ones in the linked thread) are pure speculation and a waste of time.

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