Many times i have seen in video or photos of modified Felicia a hood scoop, i like especially this kind:

 

Has everyone has the thought to install one in his Felicia?

Which are the advantages and disadvantages (pros and cons) of that style of hood scoop?

Installing that scoop the factory goes away or stays as additional?

 

Here is a very informative video:

 

 

 

 

In my opinion this hood scoop will not give you any advantage. It won't bring air to the engine to cool it, it will just bring air to the filter box which I find useless. In other words I think it is made just to contribute to the look of the car.

47 minutes ago, Raychev05 said:

it will just bring air to the filter box

Agreed.

 

Also @D.FYLAKTOS I strongly suspect that if you want a duct that far back on the bonnet to reduce underbonnet temperature, it would need to point the other way and extract air from the engine compartment. The reason the scoop on the Mustang works is that it's over the air intake, and also not over the HT electrics.

59 minutes ago, Raychev05 said:

In my opinion this hood scoop will not give you any advantage.

True. The air flow is a science. Cool design, zero efficiency.

1 hour ago, Raychev05 said:

It won't bring air to the engine to cool it, it will just bring air to the filter box which I find useless.

In fact it will do exactly what current grill does. Bring air to the blower for the cockpit. Nothing to do with the air filter.

1 hour ago, KenONeill said:

 if you want a duct that far back on the bonnet to reduce underbonnet temperature, it would need to point the other way and extract air from the engine compartment.

I think some air is extracting from the sides of the bonnet but when we want to extract more what can we do?

How can will force the hot air to exit from the down left-right of the engine bay?

1 hour ago, D.FYLAKTOS said:

I think some air is extracting from the sides of the bonnet but when we want to extract more what can we do?

How can will force the hot air to exit from the down left-right of the engine bay?

Louvres in the aft half of the bonnet, a radiator extractor scoop similar to on a Corvette C6 or C7 GT sports racing car, bonnet raisers to lift the back edge of the bonnet a couple of inches...

None of which make the mistake of increasing drag and lift by forcing more air under the car.

What do you want to achieve? Engine's inlet is under bumper bumper, so scoop is useless for that. And ventilation inlet is placed in spot with atmospheric air pressure, so scoop is not needed. Some racing felicias have engine inlet under ventilation grill, no scoop involved.

Edited 17 May, 20215 yr by Papez

10 hours ago, D.FYLAKTOS said:

How can will force the hot air to exit from the down left-right of the engine bay?

what do you want to achive?

Well this scoop is only going to work as a passive ventilation for the cabin, as long as recirculation is off, then you will have a bit more airflow without using the fan, but it will increase drag and more so whats the point, the grills that the felly has not only look nice, but do provide some airflow to the cabin without the use of the fan and they absolutely do not hinder aero performance.

In the question: what do you want to achieve?

my answer is: i want to help my engine to cool better, i want to make the hot air exit from the engine bay faster.

I don't want to cut the hood to put those fancy vents because i don't want water from rain or car washing to come inside.

 

1 hour ago, D.FYLAKTOS said:

In the question: what do you want to achieve?

my answer is: i want to help my engine to cool better, i want to make the hot air exit from the engine bay faster.

I don't want to cut the hood to put those fancy vents because i don't want water from rain or car washing to come inside.

 

Then you have to either use bonnet raisers or cut extractor vents of some form. Forcing air into the ventilation intake from above the bonnet won't extract air from the engine bay, no matter how often you ask. Counting myself, there are 3 different people who've told you this.

If your engine is overheating then look at the reasons why, if it isn't then your desire to help your engine cool better is irrational at best.

 

The scoops on the side appear to be dummy ones with no holes cut either in them or the bonnet, the one on the rear would channel air into the heater plenum if it even worked and not let hot air out of the engine compartment.

 

The reason I say "if it even worked" is that the existing grille is in a low pressure area and may be fed from turbulent airflow flowing down and forwards from the windscreen, the scoop could well reduce the heater fan efficiency.

 

If you just want the scoop to look cool then go ahead, knock yourself out, you dont need to ask advice.

3 hours ago, D.FYLAKTOS said:

my answer is: i want to help my engine to cool better, i want to make the hot air exit from the engine bay faster.

 

I think that hole under the engine bay is big enough to get hot air out. If you have issues with overheating, you need to check your cooling system. If you don't have issues, but you want to improve cooling anyway, you can get larger radiator, for example from diesel model.

improve air inlet to radiator, create an inlet at the perforated part of the foglight housings and then let the positive pressure air find its way out, in any case it will harm aero efficiency

5 hours ago, Thefeliciahacker said:

How can will force the hot air to exit from the down left-right of the engine bay?

Look air will exit out just because the underside of the car is a low pressure zone and the inside of the engine bay is a high pressure zone.
Anything extra like deflectors pipes etc will absilutely not do any good whatsoever.
An unertray with special (low drag) cutouts to aid cooling to specific parts would be ideal, and you could also speed up and clean up the underbody airflow to the point that you have some efficient underbody heat extraction.

Edited 17 May, 20215 yr by Thefeliciahacker

1 hour ago, Thefeliciahacker said:

improve air inlet to radiator, create an inlet at the perforated part of the foglight housings

 

That won't help, there's already duct (or it should be there) between bumper and front panel, that directs air from bumper vents to radiator - air from foglight housing won't pass over it

Edited 17 May, 20215 yr by Papez

6 hours ago, Papez said:

foglight housing won't pass over it

was talking about engine cooling not rad cooling
 

 

6 hours ago, Papez said:

That won't help, there's already duct (or it should be there) between bumper and front panel

still there is room for improvement

10 hours ago, Thefeliciahacker said:

was talking about engine cooling not rad cooling

 

Well, it's watercooled engine, so rad cooling=engine cooling. That engine has been designed to run in the back, so it already has plenty of extra airflow in Felicia.

 

10 hours ago, Thefeliciahacker said:

still there is room for improvement

 

Maybe, by getting the duct more tight to make sure that all air from bumper is forced through radiator.

50 minutes ago, Papez said:

That engine has been designed to run in the back, so it already has plenty of extra airflow in Felicia.

old skoda variants had cooling fins in the oil pan felly doesnt have them, or you could direct air to the gearbox

20 hours ago, Thefeliciahacker said:

Anything extra like deflectors pipes etc will absilutely not do any good whatsoever.

 

create an inlet at the perforated part of the foglight housings
 

 

I thought that could be a way to do that for example with a small auxiliary fan.

 

From the left fog light there is already a pipe which droves air into filter box but still there is a gap between radiator and the frame

A pipe fits in there but while moving on a highway the air that passes from that hole is significant?

 

 

On 17/05/2021 at 12:52, J.R. said:

then your desire to help your engine cool better is irrational at best.

 

If you just want the scoop to look cool

 

Your opinion which i do not take into account.

 

My car is for driving from home to work, for mountain routes and small trips with my family.

Do i look like a teenager which asks from his "mammy" money to buy 20 inch rims for his small car to make impression in the next ''Super Modified Cars" magazine June 2021 edition?

 

On 17/05/2021 at 12:52, J.R. said:

then go ahead, knock yourself out

 

Your comment is very offensive and without a reason because i have never provoked you, if i was a bad boy i should answer ''Go drawn, will save us a pension" but since i am a nice guy i will not say it.

On 18/05/2021 at 12:12, D.FYLAKTOS said:

is significant

Not significant but if we are talking about marginal improvment (which we are)  then yes every little bit helps

Please let me know what I have to do to get a pension from Greece because neither the French nor UK government will be doing so.

 

Re "knock yourself out" I used it in the sense of saying "go for it", I had not realised that it also had a facetious & sarcastic use, that was not what I intended so I apologise if you read it that way, if I don't know the phrase properly in my mother tongue then I can't expect someone using their second language to.

 

https://english.stackexchange.com/questions/283264/knock-yourself-out-what-meanings-does-it-have

Edited 19 May, 20215 yr by J.R.

On 18/05/2021 at 08:33, Thefeliciahacker said:

old skoda variants had cooling fins in the oil pan felly doesnt have them

 

And oilpan is already exposed to underbody airstream, so there's nothing to improve. For oil cooling improvement, it's probably better to use heat exchanger.

 

1 hour ago, Thefeliciahacker said:

Not significant but if we are talking about marginal improvment (which we are)  then yes every little bit helps

 

What improvement do you mean? 

2 hours ago, Papez said:

For oil cooling improvement, it's probably better to use heat exchanger.

In English, we'd normally call that an "oil cooler", but that's just semantics.