Dyno request: stock vs aftermarket intercooler

[Racket]

Past experience on DSM turbo cars. They too had soft sided IC piping and they swell up during boost build, meaning the boost fills the stretched pipe diameter and then fills the intake manifold. With hard pipe there is no stretch so boost pressure goes directly into the manifold sooner, shifting the powerband to ramp up at an earlier RPM. That’s why the hard IC pipes show gains down low and nowhere else up top.

Frankly there needs to be flexible couplers to the IC.

I expect an 'upgrade' intercooler is going to be a larger chamber to expand and cool the air charge. Functionally dropping the pressure, so it will have to be 'made up' to recover (or increase) boost.

The improvement will be in sustained temperature drop.

Factory blowoff vents at around 22psi? But the factory/aftermarket tubes are sealed either way.

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[importfighter01]

Correct there are normally soft couplers at the turbo, IC, and TB connections to allow for install/removal and engine movement. The difference is those connections are minimal soft sided piping to swell vs the stock setup.

 

[BassRanger]

Mutli-ply, woven fabric reinforced silicone pipes are not going to grow from a couple of pounds of air pressure, unless they have been seriously degraded or have prolonged exposure to oil.

 

[Racket]

...and there is going to be movement of the engine in relation to the fixed intercooler... like the radiator.

 

[importfighter01]

Mutli-ply, woven fabric reinforced silicone pipes are not going to grow from a couple of pounds of air pressure, unless they have been seriously degraded or have prolonged exposure to oil.

I agree with not swelling with a couple of pounds of pressure, but 22lbs at WOT is a different story. What are your thoughts on the aFE dyno graph in this thread showing only a gain from 2200 to 3200 rpm? What would cause that gain if no swelling was taking place with factory silicone IC piping and the hard piping is no longer allowing that behavior? Would love to hear your perspective...

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