A while back, I contemplated an intake system which eliminated the airbox and the tubing from the airbox to the turbos and, instead, placed an air filter directly in-front/adjacent to each turbo -- the air collected by the intercooler side vents could be redirected to the air filters in front of the turbos. The result would be a sort of ram air effect, with much less piping to reduce airflow. I think the theory is sound, but I was told that the primary obstacle is the MAF. There is only one MAF and, while it probably could be relocated, it has to measure the airflow to BOTH turbos, as opposed to only the right or left turbo. Therefore, it would be difficult to accommodate the MAF with two different air filters immediately adjacent to each turbo. I am informed that Protomotive may have employed a set-up similar to this, so they may have figured out a way to work around this obstacle.

Check out the following set-up:



The air filter is plugged right into the turbo, and it appears to receive its air from the intercooler vent. I have no idea how the programming was done to accommodate the MAF. This is a limited purpose car, not available to the public, so perhaps Motec was used?

Check out the size of the turbo.

I have no idea what purposes are served by some of the additional pipes depicted in the photo. For example, there appears to be a pipe coming off of the header, and then another copper colored pipe going towards the back of the car. Anyone know what these pipes do?

Anyone know what car this is?

Craig

 

Interesting. It looks good in theory. However, I would be afraid of hydrolock (water) with such a low air filter.

 

Craig- those pipes are for the external wastegates.. the round silver piece it the wastegate...Ive been thinking a lot about the same set up... my EVO tuner has been trying to convince me to switch to an external wastegate for a year now.... this would eliminate boost creep and also one can really adjust the wastegate without having to mess around with "turning the nuts on the rod". more accurately. Ive heard that most US tuners do not go this way cause they want to keep the TTs as stock looking as possible( for service @ the dealer).
But this is , I was told , a better way to go.

 

that looks good in theory but in real world condition, the debris that hat thing will endure is for sure gonna mess up the filter.. it'll carack it and rocks will be going in to the filter and then staright to the turbo, even a small pebble will mess up the blades on the turbo.. a small crimp on th blade will hinder performance. also water can easily hit the filter and go intot the turbo... the filter might also get clogged by all the dirt it acumullates, which may hinder perfomrance...

 

you'd also think w/ the turbo right there it'd be drawing in a ton of hot air

 

All good points . . . which clearly evidence that this is NOT intended as a street car. So, whose car is it and what was it created for?

Craig

 

That draws a huge amount of hot air.

The dual external wastegates create lag.

The MAF was moved to the pressure pipes on that car which was deemed unfit and would not live.

 

Stephen - I am thinking of going to external wastegates. Why will there be more lag with external vs internal w/g's?

 

I think that when the car is stationary it will draw in a lot of hot air, but when its moving it will draw in ambient temp air.

 

You fill more cavities and have to have that velocity come back up to speed when that empties. Stay with the internal units. If you need better wastegate flow then have the ports opened up.

I would have to say you will have more heat on the road. At idle the EGTs are about 3-400 at the header. Under the road condition and boost they range 900-1200 degrees on average. Air movement or not that is double the heat. The turbos are sucking little air at idle and maybe 3-500CFM underboost per turbo. No doubt they will take in a ton of heat.