Tuning Swirl flaps removed autolusso bournmouth

[yampug]

Booked my croma 2.4 in at autolusso bournmouth this month to have cambelt and waterpump changed plus swirl flap removed. egr blanked and dpf um made slightly lighter. plus a remap.

was slightly apprehensive before booking it in wondering if i was doing the right thing. normally i like to keep things standard but my croma has never felt right. it's always felt like a tractor at low revs.

definitely made the right choice croma feels like a totally different car no longer feeling strangled at low revs no more tractor sound and the performance difference is very noticable.

so too any one thinking of getting this work done id say go for it. not cheap to get done but still far cheaper than buying an alfa 159. cost of buying my croma plus getting all the work done was considerably cheaper than cost of a 159.

 

[g8rpi]

Interesting.
The only downside is that it makes the car illegal to use on the road.
What did you tell your insurance company?

Robert G8RPI.

 

[dtimmins1985]

Booked my croma 2.4 in at autolusso bournmouth this month to have cambelt and waterpump changed plus swirl flap removed. egr blanked and dpf um made slightly lighter. plus a remap.

was slightly apprehensive before booking it in wondering if i was doing the right thing. normally i like to keep things standard but my croma has never felt right. it's always felt like a tractor at low revs.

definitely made the right choice croma feels like a totally different car no longer feeling strangled at low revs no more tractor sound and the performance difference is very noticable.

so too any one thinking of getting this work done id say go for it. not cheap to get done but still far cheaper than buying an alfa 159. cost of buying my croma plus getting all the work done was considerably cheaper than cost of a 159.

Hmm sounds very nice indeed.

How long did they have your car and how much did it all cost.

I would like my swirl flaps removing and EGR blanking properly, its disabled in the ECU but not blanked (from what i can see)... and possible the straight through exhaust system fitting... would be great if i could get it all done in one go on a visit down there.

I have a friend who said he can do my swirl flaps but would need the car 3 days - dont think that's right... and i cant be without my car for 3 days.

I see your location says Salisbury, my fathers side of the family are from Salisbury, i would love to see your car when Im next down there, you may know a relative of mine - he is very well known down there, he is my uncle and is a driving instructor - Sarum School of Motoring he is called Jamie.

If you still have your motor when I next come down, would you like to meet up?.

 

[s130]

Don't know for sure on the 2.4 but on the 1.9 Multijet the swirl valves often disconnect themselves (they did on my 1.9). This is on the 1.9s dead easy to check their operation by observing the bar on the top of the cylinder head, between the cams, that links the flap top drive spindles to each other.

On the 1.9s the usual problem is that the link from the driving solenoid drops off. This means that the flaps remain in the fully open position but the drive motor/solenoid operates correctly and the ECU is happy.

There are two ways to remove the swirl valve operations. One is via reprogramming the ECU to map them out. This has insurance implications. The other is to hope the linkage drops off.

I didn't know my swirl valves were not working till I got round to replacing my glow plugs. Whilst I was there I took the opportunity to check everything over.

On the 1.9 the valves operate as follows:

1) with engine not running their rest position is fully open
2) on engine start and idling they are fully closed
3) between idle and either approx. 2000 rpm or approx. 3000rpm (can't remember exactly) then as the rpm increases the valves gradually open to be fully open at 2K/3K

For EGR removal and ECU reprogram is required otherwise the engine MIL/warning light will come. Again a potential insurance issue.

However Fiat have an official restrictor plate which for me overcame all my EGR issues.

With respect to swirl flaps and EGR be thankful you don't have certain models of BMW. Apparently when the intake manifold clogs up with the EGR soot and oil deposits and the flaps fail then some little internal to inlet manifold nuts/screws work loose and get ingested doing significant engine damage.

 

[g8rpi]

<SNIP>

However Fiat have an official restrictor plate which for me overcame all my EGR issues.


<SNIP>

See my guide here:


https://www.fiatforum.com/miscellan...v-mjtd-egr-valve-restrictor-installation.html


I've had no issues since fitting the restrictor plate and it keeps the car legal.


Robert G8RPI.

 

[buster]

Had exactly the same done to my 2.4,plus the gtb2056 turbocharger conversion,straight through stainless exhaust pipe exiting into twin tail pipes and a rolling road remap to marry it all up.
Getting rid of the swirlflaps and egr is the best thing you can ever do to a compression ignition engine.The swirlflaps main job is to create swirl to mix the egr gas entering the cylinder with clean air.This only leads to a 20 valve running on 15 valves as 5 inlet valves generally block up with the crud from the egr and the swirl flaps drop to bits and linkages pop off.The word was with the swirl flaps removed the engine lost bottom end torque,dont think so.

 

[s130]

.The swirlflaps main job is to create swirl to mix the egr gas entering the cylinder with clean air.

This is not quite technically true. The flaps have nothing to do with mixing EGR and inlet air. This all happens at in throat of the plenum chamber.

The purpose of the swirl flaps is to increase speed of the already mixed air/EGR charge into the combustion chamber at lower speeds. The increased velocity of the charge together with the port/head design creates swirl effect (bit like a tornado) so when the fuel it injected and atomised into the swirling gases then is even better mixture and thus better and more powerful combustion.

The reason for the increased velocity is that the actual inlet manifold has TWO ports per cylinder. The swirl valve blocks/controls the flow through one of the ports. As for any given RPM the volume of air/EGR intake is the same then by blocking/restricting one of the two paths then the velocity of gases through the other path will be increased.

Next time you are down the pub with a pint ask for two straws and experiment yourself

 

[s130]

.The swirlflaps main job is to create swirl to mix the egr gas entering the cylinder with clean air.

This is not quite technically true. The flaps have nothing to do with mixing EGR and inlet air. This all happens at in throat of the plenum chamber.

The purpose of the swirl flaps is to increase speed of the already mixed air/EGR charge into the combustion chamber at lower speeds. The increased velocity of the charge together with the port/head design creates swirl effect (bit like a tornado) so when the fuel it injected and atomised into the swirling gases then it is even better mixture and thus better and more powerful combustion.

The reason for the increased velocity is that the actual inlet manifold has TWO ports per cylinder. The swirl valve blocks/controls the flow through one of the ports. As for any given RPM the volume of air/EGR intake is the same then by blocking/restricting one of the two paths then the velocity of gases through the other path will be increased.

Next time you are down the pub with a pint ask for two straws and experiment yourself

 

[buster]

You never stop learning.Good post s130