Model Year 19 Cupra ST 4 Drive Resonator Delete Issue

[silky16v]

Having looked into the whole GPF delete on my UP GTi in detail and having fitted a Milltek cat back system I looked into the inline box and can confirm it’s a cat has the perforated design and I’d say I’d around a 400 cell cat with an EGT sensor right afterwards
Obviously the UP GTi only runs 1 cat and the Cupra has 2
The GPF in design is similar to a DPF and isnt see through and is far more made up in nature and runs a dam sight hotter than the pre GPF cars

The EGT is for the regen of the GPF (and or to enrichen the mixture when WOT) and so that the cats don’t get damaged with excess heat
But as we all know diesels are opposite to petrol as to run hot to regen it will have to run lean (where as diesel needs fuel to burn hotter)

Running lean isn’t good for components long term but I guess certain cruise and rpm criteria will need to meet for GPF regen

I’d like to see the inline cats removed with a delete pipe and the EGT sensor moved further up the DP nearer the GPF to compensate for the cats going but until someone has a play around and actual sees what the EGT sensor is reading and at what temperature it alters the map or stops the regen

For time being I’ve left my GPF in my GTi until further development work has taken place to understand the effect of a GPF delete pipe and what parameters will be effected and or if the map will need altered to suit

 

[silky16v]

So are you planning a res delete?

Yes I have a full decat on order for my UP GTi but have yet to find a tuner willing to develop a map to suit and confidence they understand these new GPF systems

Cupra Carbon has Scorpion DP on order along with Forge FMIC, res delete and H&R RARB for the Carbon Edition the rest I already have fitted, muffler delete, intake elbow, silicone pipe, panel filter and modified stock airbox

And before anyone says I’m not going full intake setup as it’s simply not needed (stock airbox has been proved to be fine on stock turbo) and I hate the induction noise you get

 

[Damo H]

Yes I have a full decat on order for my UP GTi but have yet to find a tuner willing to develop a map to suit and confidence they understand these new GPF systems

Cupra Carbon has Scorpion DP on order along with Forge FMIC, res delete and H&R RARB for the Carbon Edition the rest I already have fitted, muffler delete, intake elbow, silicone pipe, panel filter and modified stock airbox

And before anyone says I’m not going full intake setup as it’s simply not needed (stock airbox has been proved to be fine on stock turbo) and I hate the induction noise you get

Meant the Carbon

Scorpion Down Pipe?

 

[silky16v]

Meant the Carbon

Scorpion Down Pipe?

Yeah Scorpion decat downpipe and front mount
If I’m gonna map it and dsg may as well go full hog and aim for 400/400

 

[ramborobert]

Is there any pics of the 5 door exhaust setup Is it dual cats?

 

[Damo H]

Asked in the Who's ordered a Cupra thread.

 

[Deleted member 103408]

And I have asked on the modding on new 290 with gpf fitted thread.

https://forums.seatcupra.net/index....90-with-gpf-fitted.448443/page-2#post-4823456

 

[Smolyneux85]

I’ll take some pictures shortly


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[Smolyneux85]

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[Craig Elliott]

Is that the brand new 2019 290 model?

 

[Smolyneux85]

Is that the brand new 2019 290 model?

It sure is, it was a Bw38 so pre copper badging etc with 7 speed DSG.


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[Craig Elliott]

That looks very different to the ST exhaust. No sign of a double cat?

 

[Craig Elliott]

@Smolyneux85 can you post these pictures in this thread for the new Cupra 290 as its being discussed there too

https://forums.seatcupra.net/index.php?threads/the-2019-leon-copra-290-thread.448579/

 

[ramborobert]

My pre copper cupra is the same setup looks dead easy to do a res delete nice straight pipe 1 cut required and easy to put back

I have bad news tho which is unrelated to a res delete all wltp cars have lost multi port injection which is the reason I sold my mk2 cupra due to misfires

 

[CupraRobX]

My pre copper cupra is the same setup looks dead easy to do a res delete nice straight pipe 1 cut required and easy to put back

I have bad news tho which is unrelated to a res delete all wltp cars have lost multi port injection which is the reason I sold my mk2 cupra due to misfires

Oddly enough, I spotted this also when I was showing my mate the engine bay on Sunday. I only noticed when I took the cover off and could see where the secondary rail sat on the previous iteration of the EA888's in the Cupra, but not on the WLTP ones.

 

[Lmbarrett83]

My pre copper cupra is the same setup looks dead easy to do a res delete nice straight pipe 1 cut required and easy to put back

I have bad news tho which is unrelated to a res delete all wltp cars have lost multi port injection which is the reason I sold my mk2 cupra due to misfires

Is this really bad news?

I don't know much about the technologies involved.

Could it be the case that the new technical engine/exhaust changes (inc GPF) mean that multi port is no longer required?

I'm sure I'll have a read at some point but any explanations welcome.

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[Copra68]

It doesn't really bother me the different injection set up, I'll have it for 3 years whilst it's under warranty then waving goodbye. It goes like stink that's all that bothers me and supposedly drives better than the previous 300.

 

[Damo H]

Is this really bad news?

I don't know much about the technologies involved.

Could it be the case that the new technical engine/exhaust changes (inc GPF) mean that multi port is no longer required?

I'm sure I'll have a read at some point but any explanations welcome.

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Been thinking about this I'm not sure if it is a GPF as such. I it not just a more restrictive Cat? As for the multi port. If its only lost 10hp, is that due to a more restrictive cat, or is that due to losing the multi port and having to have a flow single injection? Have to admit I don;t know enough about the Cupra engines to even know if they have injectors or what haha.

 

[silky16v]

coking up will be more of an issue due to losing the multiport
but if most are only keeping there cars 3yrs then is the next owners problem (pretty much like the TFSI engines)
The GPF is massively more restrictive, thus effecting the engines ability to rev quickly (you now have in essence 2 cats or 3 on the ST)
where as before there was just one in the DP right after the turbo

the only advantage i see with the GPF equipped cars are clean exhaust pipe tips lol!

 

[Deleted member 103408]

I have also seen a number of post's saying more carbon build up in the engine which the Lease owners wont care about.

I suspect the other advantage of GPF Over time is going to be you will find it harder and harder to drive into major towns in cars not fitted with such stuff.