Gpf advice

[NoSmokeNoPoke]

Hello everyone. I have a 2020 Cupra 290. I want to drop down the gpf filter and cut it at the top, remove the internals and weld it back up. This is so when it’s inspected for MOT it will not fail. ( I’ve been told aslong as it’s visually there it won’t fail) is this correct?

The car is just so quiet at the moment and I don’t think a res delete will do anything noticeable with the GPF still intact .

Is what I’m going to do ok? Will I get warning lights, limp mode or any running issues until I can get a remap done?

I appreciate any advice as I’ve only ever worked on older cars .

Thanks. Jim .

 

[piggasinnaris]

Honestly it's entirely tester dependant.

They *should* do a tailpipe emissions test, which by removing the GPF it'll technically fail because it'll be higher PPM of particles than is allowed. But most testers, especially on petrols, don't really bother. The rule is officially, if they can see a filter (DPF, GPF, catalyst, whatever) then it should be tested. If you are planning on cutting yours out, it'll still be technically there from a 'visual' perspective so they should test it.

The good thing is GPFs are recent and uncommon enough, unlike DPFs, you'd easily get away with it I'd think.

Key phrase here is should - not will. I'd suggest going to a more relaxed tester, smaller independent local place rather than a big major chain and you should be fine.

(Then there's the whole argument around removing factory fitted emissions equipment, which is illegal, invalidates your insurance, if you tell your insurance you removed it, then its not road legal, blah blah blah. It's your risk v reward to take, don't listen to people saying you are going to jail for 1000 years for tampering with emissions equipment or single handedly killing the penguin population. It's your choice.)

 

[NoSmokeNoPoke]

Hey Piggasinaris,

Thanks for the response mate. I was under the impression that they only tested the GPF if they actually saw it so it’s nice to have that cleared up.

Are you clued up to know if I will get any lights on the dash or any issues with how the car drives ? It will get mapped but in the meantime I’m good?

I’ve always de-cat’d my cars(won’t be on this one) so I’m not worried about the law , it’s more I have to drive a fair few miles to get to the MOT station and he is a bit dodgy. It would be nice to just drive to any normal MOT station that nearby and get it done.
If I try a new place and they fail it, can I just go back to my other guy and he will pass it ?

Jim

 

[piggasinnaris]

I don't mate sorry. I've not owned a petrol in many years (not a fan!) so can't comment on what you'll see.

I'd imagine though you'd see no difference in how it drove but maybe a warning light, if the car is smart enough to know its not there (similar to how a cored-out catalyst performs with o2 sensors at either side)

As for MOT testers failing it and going elsewhere, generally speaking, no, they won't. It's far, far more likely an MOT tester will get caught if they immediately pass a car that another tester failed 5 minutes ago, especially if the failures (like emissions) are major. I've never met a tester who'd do that, even the sketchiest ones!

 

[NoSmokeNoPoke]

Thanks again. I’m back to petrol after many years of driving dirty diesels. Name probably gives it away. Still all Leon’s

 

[DEAN0]

The last few MOT's I have gone through - every car i have watched ( including mine ) has had a tailpipe emissions test done.
They enter the car reg in the machine and it loads the accepted emissions data.

The regs are only going to get tougher ( upcoming changes are the car to be photographed during the MOT )

ALSO - any fail or advisory on an MOT will be on the system so whoever does the retest will know what the issue is/was.

 

[Mo_86]

A friend of mine with a gti had his removed, once on the floor the amount of sandy residue that came out was worrying.
Unlike a dpf it seems like there's a concrete block in the filter lol.
Anyway you will need to code out regens and tell the car there isn't a gpf anymore as you will get a fault code after a few miles.
Btw the sound is so much better I'm thinking of getting it done on my 190 tsi.

 

[East Yorkshire Retrofits]

Hello everyone. I have a 2020 Cupra 290. I want to drop down the gpf filter and cut it at the top, remove the internals and weld it back up. This is so when it’s inspected for MOT it will not fail. ( I’ve been told aslong as it’s visually there it won’t fail) is this correct?

The car is just so quiet at the moment and I don’t think a res delete will do anything noticeable with the GPF still intact .

Is what I’m going to do ok? Will I get warning lights, limp mode or any running issues until I can get a remap done?

I appreciate any advice as I’ve only ever worked on older cars .

Thanks. Jim .

The car will likely go into limp mode without a suitable GPF delete carried out via tuning

 

[queen]

Is what I’m going to do ok? Will I get warning lights, limp mode or any running issues until I can get a remap done?

I appreciate any advice as I’ve only ever worked on older cars .

Thanks. Jim .

You will get a check engine light immediately and until you code it out. The car will drive fine if you drive it normally unless you floor it, then it'll go into limp mode. So you'll be driving with an EML until you get to your tuner. The GPF is very restrictive so the first thing you'll notice is how better your car will sound, even during normal driving.

That's what happened in my case as I have the same car. I had the GPF removed and I drove with an EML for about 30 minutes until I reached my tuner.

 

[NoSmokeNoPoke]

You will get a check engine light immediately and until you code it out. The car will drive fine if you drive it normally unless you floor it, then it'll go into limp mode. So you'll be driving with an EML until you get to your tuner. The GPF is very restrictive so the first thing you'll notice is how better your car will sound, even during normal driving.

That's what happened in my case as I have the same car. I had the GPF removed and I drove with an EML for about 30 minutes until I reached my tuner.

Thanks for the reply. I can’t get my remap done until 3 days after the GPF delete so I’m hoping if I drive steady I can get to work and back until it’s done.

Is your system standard other than the GPF delete? Would love a video of what it sounds like if that’s possible .

Is it too loud with GPF and a res delete?

Thanks. Jim

 

[queen]

Thanks for the reply. I can’t get my remap done until 3 days after the GPF delete so I’m hoping if I drive steady I can get to work and back until it’s done.

Is your system standard other than the GPF delete? Would love a video of what it sounds like if that’s possible .

Is it too loud with GPF and a res delete?

Thanks. Jim

I think you'll be fine for a few days.

I have a big turbo now so a lot aren't stock.

I think it will be very loud, I believe Seat went with a not so quiet back box as with the GPF it was already too quiet.
When I went big turbo I already had a GPF-back 76mm milltek exhaust (non res), and just changed the downpipe to an 80mm with a high flowing sports HJS cat, I could wake up the whole neighborhood! During cold start it was causing a small earthquake. Pulling away from a stop light it sounded like a tractor or like a hot rod at santa pod staging for a race.

Now I have a resonator fitted, the biggest I could get and it's still loud but I like it that much.

Good luck with everything!