3 hours ago, Thefeliciahacker said:

1.3 34% thermal efficiency

1.6 21.2% thermal efficiency

 

negative thermal efficiency

Something fishy is going on here

 

That's why it's regulated by a thermostat valve. The radiator often needs to dissipate more heat than the engine produces due to thermal capacity. Also, I have no idea how it's calculated, but it'll dissipate less heat during higher temps/lower speeds.

 

The diesel is indirect injection with pre-combustion chamber - that means that more heat goes into coolant (and less into exhaust), which is why it has the largest radiator of the three.

It doesn't make sense. 

If the 1.6 engine can output at most 40kw of heat energy in the system how come by adding ac you double the heat it will output into the system. 

In fact how can it dump more heat than it's nominal power output. 

That means it's negative percent efficient. 

Obviously all these are based on a delta from ambient at a certain airflow. 

1 hour ago, Thefeliciahacker said:

Obviously all these are based on a delta from ambient at a certain airflow. 

 

That's what I meant. I guess it's something like 20° at 50km/h.

 

1 hour ago, Thefeliciahacker said:

how come by adding ac you double the heat it will output into the system. 

 

You don't add heat, but you decrease efficiency of the rad by putting hot condenser in front of it.

 

1 hour ago, Thefeliciahacker said:

In fact how can it dump more heat than it's nominal power output. 

 

By accumulating a few kilojoules of heat when it's running without cooling. 

This is the front-left

 

 

the front-right

 

 

 

and the Inside-right side.

 

 

 

I see an empty space down there, the hose is from the end of the radiator estimated about 8cm plus at least 3 from the other side is 11Cm

 

From the 1.3 radiator (485mm) to the 1.6 radiator (590mm) we have 105mm (10,5cm) so it may fit even a little bit tight.

 

It seems that if you moved the radiator to the left, it'd be covered by metal - negating the difference in area.. Only solution would be to route the condenser pipes properly, following the factory installation - which would be probably quite expensive.

 

@Thefeliciahacker Do you have, by any chance, an installation manual for the Alex AC unit for 1.6/1.9? It'd help to see their solution of the issue.

Edited 15 June, 20232 yr by Papez

1 hour ago, Papez said:

Do you have, by any chance, an installation manual for the Alex AC unit for 1.6/1.9? It'd help to see their solution of the issue.

Sadly no but I can ask Alex. 

My car has enough space and enough cooling. 

3 hours ago, Thefeliciahacker said:

My car has enough space and enough cooling. 

 

Where does the upper pipe go? I can't see it in the photo. But that fan shroud looks nice

 

Enough cooling - there were instances where my Felly didn't have enough cooling (highway, 120kph, uphill, 30°C), even without condenser covering whole rad 😁

44 minutes ago, Papez said:

Where does the upper pipe go?

 

But that fan shroud looks nice

 

Isn't that for the thermostat?

 

 

It's the stock.

Edited 15 June, 20232 yr by D.FYLAKTOS

2 hours ago, D.FYLAKTOS said:

Isn't that for the thermostat?

Also @Papez It's a duct which increases the efficiency of the fan. I found this out when working on a 2.0l Cortina; I changed the cambelt and didn't replace the shroud, with the result that the engine temperature, which had been stable at about 90C, went up and down between 70 and 110C.

3 hours ago, Papez said:

Enough cooling - there were instances where my Felly didn't have enough cooling (highway, 120kph, uphill, 30°C), even without condenser covering whole rad

I have brand new mahle rad the upper rad hose sits right below the hydro steering reservoir

10 minutes ago, Paws4Thot said:

It's a duct which increases the efficiency of the fan.

 

Yes, it has been mentioned elsewere that removing this plastic duct only makes things worst, the inclinations on the sides makes more incoming air to "hit" the radiator and not lost in turbulances around it.

2 hours ago, D.FYLAKTOS said:

It's the stock.

I know, I meant its shape, they are often covered with rust 😁

16 minutes ago, Paws4Thot said:

It's a duct which increases the efficiency of the fan.

Yes, I know, 1.3 without servo or AC had just fan with a ring around it, which cooled only small portion of the rad. 

 

18 minutes ago, Thefeliciahacker said:

upper rad hose sits right below the hydro steering reservoir

 

I meant pipe to the condenser pipes/hoses.

 

I still had the original rad. It still worked most of the time and I wasn't sure which brand would be a good quality replacement 😁

@Thefeliciahacker : Is this what you have?

https://kritosparts.gr/Part/PSYGEIO-NEROU-6U0121251C/e2876U0121251C

https://m.autodoc.gr/mahle-original/15293847

This one

54 minutes ago, Papez said:

meant pipe to the condenser pipes/hoses.

 

On the pasenger side hidden 

21 hours ago, Papez said:

It seems that if you moved the radiator to the left, it'd be covered by metal - negating the difference in area.. Only solution would be to route the condenser pipes properly, following the factory installation - which would be probably quite expensive.

 

To install the 1.6 radiator i had to pay a guy to modify the front duct to make it wider and pay a mechanic to modify the condenser pipes to gain few cm. On the other hand some cm will be lost on the other side since car's body metal sheet covers them.

So only few cm (with such a cost) will provide remarkable thermal efficiency to say that the project worth it?

2 minutes ago, D.FYLAKTOS said:

On the other hand some cm will be lost on the other side since car's body metal sheet covers them.

 

The body shouldn't cover the rad - the plastic shroud on the passenger side is cut away with the 1.6 rad. Unfortunately that's where the condenser pipes are run in your car..

 

4 minutes ago, D.FYLAKTOS said:

So only few cm (with such a cost) will provide remarkable thermal efficiency to say that the project worth it?

 

If the cooling is sufficient right now, it's probably not worth it. If you can get a good quality replacement once the original rad loses efficiency, it's not worth either.

Only if you cannot keep the temps in control, it'd be worthy to invest in a larger radiator and all the mods that are needed to fit it. But in that case, I'd jump straight to the 1.9D.

A 3speed fan switch 

The 3rd speed activating the extra fan? 

That could be okay for D.FYLAKTOS 

7 hours ago, Papez said:

all the mods that are needed to fit it.

 

But in that case, I'd jump straight to the 1.9D.

 

I don't know if a local car refrigeration technician wants to start such a project (cutitng and diversing pipes etc).

Usually they start the excuses ''don't do it, leave it as is stock, don't mess with modifications, you are looking for trouble'' etc because they don't want to envolved, they prefer the easy tasks which bring them easy money.

 

The 1.9 hasn't that rectangle plastic duct in front?

I would just do the 3 speed fan mod based on my relay diagram

21 minutes ago, Thefeliciahacker said:

I would just do the 3 speed fan mod based on my relay diagram

 

Our stock fan will work on 3 scales?

1 hour ago, D.FYLAKTOS said:

stock fan will work on 3 scales

No 

Our stock and one auxiliary 

1 hour ago, Thefeliciahacker said:

and one auxiliary

 

1) The position of the auxiliary is crucial? I mean as we look the radiator left or right? On the right is the stock fan and the auxiliary will push air to him.

2) Will work independently or together with the stock?

On the left passenger side, it can work alongside second speed or with a 3 speed fan switch as the 3rd speed with the 2 others engaged 

2 hours ago, Thefeliciahacker said:

it can work alongside second speed or with a 3 speed fan switch as the 3rd speed with the 2 others engaged 

 

I thought this auxiliary fan will have one scale only (manually by a switch from the driver) and will be used for harsh traffic situations only.