For ease of confusion

[Petrus]

Q&D on the 1ZZ swept cil. capacity and revs, it passes air at max. 6000 l./min., 100 l/sec.

That is not all thát much but now imagine that volume squeezing though 50 to 70 mm. diameter sized holes. This wíll create a pressure difference at either side.

On the other hand, the pressure difference is what makes the air flow in the first place.

The larger the hole, the smaller the pressure difference because the smaller the resistance to flow.

Another thing is that the Grand Limitation is....
tatatááá...
ambient air pressure.

Naturally aspirated of forced induction; it all sucks starting from ambient air pressure.
A compressor pushing more air into the engine will suck in air too, also based on the pressure differential with the ambient air pressure.

Since ány form of tuning is about more air, áll will need to look at the intake.
The more additional air is to pass the more critical this becomes because all needs to come from outside where it sits at ambient pressure with pressure differential as the moving force.

Twice the amount of air will need twice the surface or the pressure difference wíll increase and thus power left on the table.

A neat trick is an air scoop. That makes the speed the car is moving at act as an external forced induction device by in effect raising the ambient air pressure.

On our Spyder, improving the air flow through the side vents this way should have twó effects:
- increase the air pressure at the intake point
- improve flow through the engine bay = take more exhaust heat out

At least that is the logic, the idea. Has anyone tried this?
Can´t find any simple modded side vents with scoop on the web. Even adding a chamfered outer lip of 2 cm. would already add to the pressure.

[Ardent]

@Petrus

Are the C(?) type scoops something different to what you allude to?

[Petrus]

Had to look those up; had no idea the were called like that.
YES! that is what I mean.
Is there any (performance) esperience with them?

The dirty air filter in the turbo id thread has meanwhile sent me down a rabbit hole.
In the rc world there are nowadays áwesome ducted fans and those are rated in Newtons or kilograms of thrust and I am trying to get that roughly calculated into volume swept; liters/second.

Sofar got it into:
Liters/sec. = Volumetric Flow Rate
Mass Flow Rate = (Density) x (Volumetric Flow Rate)
Force = (Mass) x (Acceleration), or F = ma
F = ma = (Mass Flow Rate) x (Velocity), given a constant flow velocity
Velocity = (Volumetric Flow Rate) / (Area), where Area = (Pi) x (r^2). The duct diameter sorts that.
Thrust = (Density) x (l/sec^2) / ((Pi) x (r^2))
The density of air at 15 C. is 1.225 kg/m³ so 0.0001225 kg./l.

What I want to know is if those things can pass what the 1ZZ pumps. Nearly there 

The electric fans get their thrust figures from the speed of flow and can nót be used for f.i. because the air speeds are too low and the fans cannot compress. The compressor part of a turco-compressor is a centrifucal fan compressing the air in the snail shape.
So.. althoughducted fans cannot be used for any usable f.i., they do flow a lót of air. As such you could fit one in the hole behind the battery and possibly keep the wheel well ´plenum´ chamber slightly overfilled.

[Ardent]

I have no idea if they provide any performance upgrade whatsoever.
I only ever viewed them as purely cosmetic

[Petrus]

Ok,a 70mm 3900kv ducted fan flows three times the air the 1ZZ needs.

That seems way too much but on a car we have two extra requirement; it needs to resist continous running and be 12.4 - 14.2 V. without using more than the alternator can provide.

At half power it still almost doubles what the 1ZZ needs so yes, entirely feasable.

With a speed controller from the rc plane it would be a doddle to adjust the speed.
Hooking the feed up to a pressure sensor, set at 1 bar, inside the quarter panel would make it automatic. With an additional on/off swith on the dash ofcourse.
Cost involved for this pressure drop compensator, pdc, about 100€

A C-thingy would be simpler tough....

[Petrus]

I have no idea if they provide any performance upgrade whatsoever.
I only ever viewed them as purely cosmetic

I would not call it a performance upgrade; more a pressure drop compensation. For n.a. it would not do much because the passages are desíned to flow the 1ZZ´s need.
For f.i. tough it would probably make a difference because f.i. needs 50% - 100% more air and with the same side vent would thus have 50% to 100% more pressure drop.
For max power it would make no difference ofcourse because max boost is regulated. It will suck away till that boost is reached. It will simply reach that boost just that bit later, will have just that bit more spool up lag.

Ok, let´s see if the C- things are availeble and what they cost.

[Nvy]

I have no idea if they provide any performance upgrade whatsoever.
I only ever viewed them as purely cosmetic

I would not call it a performance upgrade; more a pressure drop compensation. For n.a. it would not do much because the passages are desíned to flow the 1ZZ´s need.
For f.i. tough it would probably make a difference because f.i. needs 50% - 100% more air and with the same side vent would thus have 50% to 100% more pressure drop.
For max power it would make no difference ofcourse because max boost is regulated. It will suck away till that boost is reached. It will simply reach that boost just that bit later, will have just that bit more spool up lag.

Ok, let´s see if the C- things are availeble and what they cost.

They are, Patrick Chambers/ Glass fibre products on FB. Idk if they are different ppl or not but you can ping them in the roadster uk groups.

Other than that it would be hard to implement some working ducting on the 2. There are lots of articles how ppl increased the air through ducting in the race cars. The one i think it works and liked was similar to the trumpet you have shown on your other thread where the opening is small and then the diameter keep increasing.

[Petrus]

Thank you Ivo.

Found one that scoops more without looking like a scoop; it replaces the OEM insert:





They are the same money as four new discs & pads though....

[Ardent]

    

[Nvy]

Thank you Ivo.

Found one that scoops more without looking like a scoop; it replaces the OEM insert:





They are the same money as four new discs & pads though....

The ones from the others are around 130 pounds. On the discs you can ping FreakyParts on fb, hes gonna give you the best prices on the market.