The great big MK6 Golf 118TSI tuning thread

[Lucas_R]

I don't think cat location really matters - i think its more for "space management" reasons that these days car manufacturers are putting the cats right up close to the engine. Go back 10 years and lots of cars had the cat located under the cabin (Jap cars especially).

Moving the cat further away from the turbo will get that heat and restriction away from the turbo (and the rest of the engine).

On the Mk5 and Mk6 Golfs (im talking GTI and R's here) they have a cat right up where the turbo is (similar to your 118TSI but its not as big) and then another cat located under the cabin - so they use 2x smaller cats rather than 1x big cat. So for these cars, most of the aftermarket dump pipes just use 1x small hi flow cat thats located under the cabin.

[Transporter]

It's close to the engine so it warms up faster.

[The_Hawk]

Foudn these today... considering trying them out:
Set of R8 coils with adapter

[Ryan_R]

R8 as in high performance coils as found on the Audi R8? I'm starting to think my car could use some new coils (having just re-read what they do).

[Lucas_R]

R8 as in high performance coils as found on the Audi R8? I'm starting to think my car could use some new coils (having just re-read what they do).

These R8 coils have been a popular upgrade for the Mk5 and Mk6 GTi and R engines for the past few years. They seem to work well on these cars (i had a set in my old Mk6 R and currently have a set in my Mk6 GTI), so no doubt they would work well on the 118TSI engine. Just be mindful that some wiring pins need to be fiddled with to suit these coil packs, as the plug is different to those used on the 118TSI engine.

[Ryan_R]

Thanks. At a point where I'm not sure if I want to treat the current car or endeavour to upgrade to used Mk6 GTI/R now that depreciation has well and truly kicked in.

[tedxzy]

Is DSG rated at 250 Nm? Will it be problem to get more power/torque out from 118 tsi engine?

[The_Hawk]

I always thought the DQ250 (DSG) and MQ250 (Manual) were rated for 250Nm (and the DQ/MQ350's at 350Nm).

Of course plenty of people are putting plenty more power through them than that and they seem to hold up pretty well (my MQ250 included).

Bottom line, yes you are putting in more power than the factory and should go in knowing that things could break and you'd be up for a repair bill if that ever happens... but then that's all part and parcel of the risk when tuning. Even if the gearbox is OK there is always the clutch plate.. or the drive shafts... or any other part of the driveline too

Hopefully someone with some real knowledge of the DSG can chime in for you though.

[Ryan_R]

If you drive with mechanical sympathy it'll be fine. i.e. don't request all the torques suddenly.

[Rawcpoppa]

If torque was really an issue we would see a ton of threads about broken dq200 clutches from people with stage 1 and stage 2.

We don't. Stage 3 and above however I've read where the clutches start to slip.

[Mk R]

Slipped into a google tuning vortex the other day and dug up these gems...

BullX 1.4 Twincharger Downpipe Euro 399

https://www.hg-motorsport.de/shop/product_info.php/info/p27854_BULL-X-VAG-1-4-TSI-FWD-Downpipe.html

What appears to resemble an S3 intercooler on Ebay from China AUD 385 delivered
VW Golf GTI 06 10 2 0T Turbo MK5 Fmic Intercooler KIT Version 2 RED | eBay

The intercooler appears to have different core thickness and outlet diameter to the stock S3 part 1K0145803P

Does anyone have any experience with these oversize units or the stock S3 units with a 118TSI?

[Ryan_R]

I've got the S3 intercooler on my car. Had to cut the end fitting off and stretch the pipe a little and use a more traditional hose clamp. Would be nice to go silicone but never found anything the right shape (all designed for the GTI/R, not the 118 ). Was mostly to help the car survive summer.

[Mk R]

I've got the S3 intercooler on my car. Had to cut the end fitting off and stretch the pipe a little and use a more traditional hose clamp. Would be nice to go silicone but never found anything the right shape (all designed for the GTI/R, not the 118 ). Was mostly to help the car survive summer.

Yeah, ok. Do you know how thick the intercooler core is on the part you installed? My concern is that the cheap ones advertised are about 57mm whereas the genuine part is 40mm. Looking at the space with the stock intercooler in the 118TSI there doesn't look to be much room...

[Rawcpoppa]

Most likely it will fit once the connection points line up as there is room in that area of the car for wider parts but what is of greater importance imo is lag due to an intercooler being too large.

Twintercooler installations on the 118tsi has led to increased lag in the supercharger portion of the band.

[Rawcpoppa]

Yeah, ok. Do you know how thick the intercooler core is on the part you installed? My concern is that the cheap ones advertised are about 57mm whereas the genuine part is 40mm. Looking at the space with the stock intercooler in the 118TSI there doesn't look to be much room...

What's the part number for your stock intercooler?

Here are my measurements for my stock versus s3 intercooler.

Core for s3 intercooler is 37 mm.