Tiguan IS38 and Big turbo upgrades

[Melbourne_Tiggy]

Tiguan TCU - be aware

So I learnt yesterday that the Printed Curcuit Board (PCB) for the DQ500MQB BOSCH is the same as the TEMIC DQ380/381! When communicating with this unit, some tuners haven mistaken our DQ500MQB BOSCH box for the DQ381 based on the same PCB. That’s one for the back pocket.

[Dose Pipe Sutututu]

Yes that's a possibility but it would have to be the GTX2867 rather than anything bigger. I'm looking at outputs 450(ish)p as I'm looking to keep the car for a while and don't want to be running things too hard.

I would be looking at a GTX2860R Gen 2, a GTX2867R Gen 2 would affect your stock like boost threshold.

I've done a few GTX2867R Gen 1 on 2x SR20s (I know different motors) but they don't wake up till close to 4k rpm. On a modern motor, with DI, twin scroll, higher compression, advance valve timing, etc. I don't see it coming on any earlier than 3.5k rpm.

On a GTX2867R Gen2, there's about 550hp worth of compressor flow.

[tigger73]

Ok then strike that one off the list.

The one that I’m considering quite seriously at the moment is the TTE475.

It’s an update to the TTE470 except with diverter recirc instead of BOV.


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[Dose Pipe Sutututu]

A good compromise would be the new Gen 2 GTX2860R, although it's advertised with a 60mm exducer, we all know the new aero billet wheels all run extended tip blade which makes them bigger than say an old GT compressor wheel.

GTX2860R Gen 2 has a compressor flow rating of 475hp, I would dare say this would be an amazing turbo if anyone is bored enough to find a blown IS38 and get a turbo builder to machine the compressor and turbine housing and fit this CHRA into it.



Unrelated but kind of related, I've got a GTX2867R Gen 2 S15 going on the dyno sometime next year after the owner replaces his gearbox, I put a base map on for him a few months ago to suit the cams, fuel system, turbo with pig rich AFRs and crap all timing and still that turbo managed to sheer 3rd gear LOL. I've done 3x GTX2867R Gen 1, IWG on E85 with stock manifolds and they all consistently pushed 270~280kW at the rear wheels on E85 and about 1.7bar of boost.

[Melbourne_Tiggy]

Ok then strike that one off the list.

The one that I’m considering quite seriously at the moment is the TTE475.

It’s an update to the TTE470 except with diverter recirc instead of BOV.


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TTE475 sounds good, early spool characteristics is encouraging......

https://www.audi-sport.net/xf/threads/tte475-upgrade-performance-turbocharger-golf-r-gti-mk-7-s1-s3-8v-tts-cupra-sc-5f-octavia-vrs.380427/

[Dose Pipe Sutututu]

TTE475 sounds good, early spool characteristics is encouraging......

https://www.audi-sport.net/xf/thread...ia-vrs.380427/

That is essentially a high flowed turbo using an original IS38 and milling out both compressor and turbine housing.

For $2400 Euros, that's haram pricing lol. $3.8k excluding shipping, import duties and GST.

I would persoanlly get a GTX2860R Gen 2 to fit into the IS38 housing for much less and have the piece of mind it's a GTX turbos that don't mind being oversped.

[Melbourne_Tiggy]

That is essentially a high flowed turbo using an original IS38 and milling out both compressor and turbine housing.

For $2400 Euros, that's haram pricing lol. $3.8k excluding shipping, import duties and GST.

I would persoanlly get a GTX2860R Gen 2 to fit into the IS38 housing for much less and have the piece of mind it's a GTX turbos that don't mind being oversped.

I just noticed that, I don’t think that’s bang for bucks compared to a new stock IS38 for about half that price and 70 HP less, however I am interested in seeing how it goes on a Tig.

The REVO Tig with a hybrid IS38 ETR is about that level of HP and does the 100-200 km/h run in around about 9.6s.

I am interested in seeing how Tigger73 goes with this.....we do need people to push the boundaries....and it sounds like an interesting albeit expensive project.

[tigger73]

I just noticed that, I don’t think that’s bang for bucks compared to a new stock IS38 for about half that price and 70 HP less, however I am interested in seeing how it goes on a Tig.

The REVO Tig with a hybrid IS38 ETR is about that level of HP and does the 100-200 km/h run in around about 9.6s.

I am interested in seeing how Tigger73 goes with this.....we do need people to push the boundaries....and it sounds like an interesting albeit expensive project.

The IS38 is where there's large volume manufacture advantage and the price is reflected in these economies of scale. I could go down this path and for sure bang for buck a stage 2+ IS38 build is where the sweet spot is.

However I think if I did an IS38 I'd always be thinking "what if" so that's why I'm looking to put something a bit bigger on and push the envelope (a bit). I'm still looking to keep it "safe" which is why anything north of 500hp is definitely off the list as otherwise it's engine build time and push 600+... but that's purely fantasty and a recipe for a dog of a daily driver.

So to keep things real (and hopefully reliable) I'm heading for a "safe" stage 3 kit which will bolt on without requiring any customisation (apart from a tune).

[tigger73]

That is essentially a high flowed turbo using an original IS38 and milling out both compressor and turbine housing.

For $2400 Euros, that's haram pricing lol. $3.8k excluding shipping, import duties and GST.

I would persoanlly get a GTX2860R Gen 2 to fit into the IS38 housing for much less and have the piece of mind it's a GTX turbos that don't mind being oversped.

I've looked at (along with my tuner) at getting a turbo built locally and realistically it doesn't turn out that much cheaper, is more custom build (with potentially higher fitting costs) and less guarantees in terms of warranty, etc.

I think with any build you're always going to get used to the power level and then want a bit more. For me I'm looking at taking it to a "safe" level with stock motor and then be satisfied with that.

[Melbourne_Tiggy]

The IS38 is where there's large volume manufacture advantage and the price is reflected in these economies of scale. I could go down this path and for sure bang for buck a stage 2+ IS38 build is where the sweet spot is.

However I think if I did an IS38 I'd always be thinking "what if" so that's why I'm looking to put something a bit bigger on and push the envelope (a bit). I'm still looking to keep it "safe" which is why anything north of 500hp is definitely off the list as otherwise it's engine build time and push 600+... but that's purely fantasty and a recipe for a dog of a daily driver.

So to keep things real (and hopefully reliable) I'm heading for a "safe" stage 3 kit which will bolt on without requiring any customisation (apart from a tune).

A hybrid IS38 should be able to get you to your goals with a good tuner, and not sacrifice drivability. The modding journey is certainly addictive, however very exciting and rewarding. It would be good to see other types of turbos being explored and used, so I look forward to reading the next phase of your build....

[tigger73]

Tiguan IS38 and Big turbo upgrades

A hybrid IS38 should be able to get you to your goals with a good tuner, and not sacrifice drivability. The modding journey is certainly addictive, however very exciting and rewarding. It would be good to see other types of turbos being explored and used, so I look forward to reading the next phase of your build....

Yes that’s what I’m aiming for is a nice car that’s easy for my wife to drive and something that puts a smile on your dial when you give it some beans.

Time to order some hardware - turbo, intake, intercooler, DP and then wait for it to all arrive....


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[Dose Pipe Sutututu]

Yes that’s what I’m aiming for is a nice car that’s easy for my wife to drive and something that puts a smile on your dial when you give it some beans.

Time to order some hardware - turbo, intake, intercooler, DP and then wait for it to all arrive....


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LOL.. If I did that, I'll probably get a divorce too haha. Already spent about 30k on mods for the R33 Skyline, that includes but not limited to a full balanced and forged motor and about a $5k+ fuel system lol. Fuel pumps and surge tank setup alone is worth an used Corolla lol.

So Tiguan for me stays stock(ish) because I also paid for additional warranty.

[Tob35]

....Fuel pumps and surge tank setup alone is worth an used Corolla lol.....

I'm not overly sure that a used Corolla is worth all that much!

[Melbourne_Tiggy]

I'm not overly sure that a used Corolla is worth all that much!

Corollas are probably more reliable than fuel pumps lol our Corolla that I didn’t service for 3 years was running fine, no probs...I wouldn’t dare do that to the Tig though....

[Dose Pipe Sutututu]

I'm not overly sure that a used Corolla is worth all that much!

A not so old one? Lol
R33 runs Teflon Speedflow lines front to back, 2x Walbro 450L pumps, 1x Destchwerks DW200 lift pump, twin solid state relays, 60 micron pre filter, 10 micron filter and an Aftermarket Industries SPR400 surge tank.

Stupidity? Yeah.. Sometimes I wished I just bought a 335i BMW instead lol.

Anyhow, went off topic lol