Revo Technik Software

[Big Yellow]

The MKV GTI had 147KW as standard. The APR Stage II gave that 205KW. That was a 39% increase and was well within the factory turbo and fuel pump's capabilities.

Isnt Stage 2 include include HPFP?? if so, that means factory pumps capabilities have been reached??

[Corey_R]

Isnt Stage 2 include include HPFP?? if so, that means factory pumps capabilities have been reached??

No. For the GTI it's only required for the Stage III kit. The same fuel pump (as the GTI) is used in the R/S3/TT-S. Their Stage I kit gives them 240kw/435nm and doesn't required the HPFP upgrade. A R/S3/TT-S Stage II+ kit requires the HPFP upgrade though.

@philthy - sorry mate, I forgot about the Nissan. But then, that's not hard for me cause I've never been a fan of any car they've made, lol

[waterboy]

Don't forget that my car is a 118TSI, not a GTI and doesnt have the same capabilities as it.

With a much smaller turbo I still think that it could cause problems for the engine.

P.s. Can you fit a BOV into the 118TSI? Might seem as a really silly question but I really dont know!

Thanks for the posts guys!! Its been really helpful!

Keep them coming :p

[Corey_R]

BOV's are illegal :p

[cktsi]

Waterboy, if you are concerned, why not choose an upgrade that achieves less of an increase such as APR?

The APR option is starting to appeal to me (I'm thinking about it) cos you can switch normal mode vs tuned mode fairly easily.

I likewise have the same concern about wear on the drivetrain, but I'm beginning to justify it on the grounds in day to day commuting I want the economy. Let's face it... that's one key reason why we bought the 118TSI in the first place.

However on weekends or in late evenings when the traffic is clear & fuel economy won't suffer so much, I would switch it to the tuned setting. The idea of having a secret Q car (I think that's the term) is very appealing.

I think most of the clutch wear would occur on take-off... so in lighter traffic it's not as much of an issue.

That's my scr3wy logic anyway.

[logger]

Is the standard turbo capable of making that much power? And can the fuel system flow the additional fuel for that power?

Pretty simply really:
If the standard turbo WAS NOT capable of making that much power - then it pretty much goes without saying - the engine would not make that much power.
If the fuel system could NOT flow the additional fuel for that power - then it would not make that much power either.
If one assumes Revo's power and torque figures are accurate then these components are clearly up to the task.

Go for it...

[Corey_R]

The APR option is starting to appeal to me (I'm thinking about it) cos you can switch normal mode vs tuned mode fairly easily.

I likewise have the same concern about wear on the drivetrain, but I'm beginning to justify it on the grounds in day to day commuting I want the economy. Let's face it... that's one key reason why we bought the 118TSI in the first place.

However on weekends or in late evenings when the traffic is clear & fuel economy won't suffer so much, I would switch it to the tuned setting. The idea of having a secret Q car (I think that's the term) is very appealing.

Yeah, APR is a great option and very easy to switch. However, both cars I've owned with an APR ECU update (MKV Golf GTI, and Polo GTI) have no had ANY increase in fuel consumption with the APR program active during 'regular' driving. What I mean by that is, if you're in the city or suburbia and accelerating at a 'normal' pace for which you could also do without the tune, the fuel consumption will be the same. Also, freeway driving, the fuel consumption is the same with tune or without.

It's only when you floor the car that the fuel consumption increases.

[prise]

I'll play devils advocate on this one.

If it was that easy to get so much more power out of a 1.4 liter engine and still get longevity and reliability, then why would VW with all the engineering resources behind them bother with a 2.0 liter for the GTI?

[iBoost]

Because they design far over the tolerances normally needed by 99% of drivers. That same car that runs fine in day to day suburbia may be taken to the outback in 50 degree heat and is expected to drive just as well there as anywhere else.

As with any of these flash tunes, it's always advisable to check the car regularly and have it serviced properly etc. If all that is done properly then the chances of a failure are very unlikely.

[idaho]

Pretty simply really:
If the standard turbo WAS NOT capable of making that much power - then it pretty much goes without saying - the engine would not make that much power.
If the fuel system could NOT flow the additional fuel for that power - then it would not make that much power either.
If one assumes Revo's power and torque figures are accurate then these components are clearly up to the task.

Go for it...

Maybe I should rephrase the question to can the engine make that power reliably? A standard 125 kw 1.4L engine has a specific power output (kw/L) about the same as a WRX STI (221kw / 2.5L). So it is not exactly unstressed to start with.

Going up to 163 kw with a 1.4L 10:1 Compression engine (and I know it has DI) on pump fuel and high-ish ambient temperatures (compared to EU) is a fair sort of ask. And just because an engine has knock control does not guarantee that it won't detonate either. It has to knock before the knock control can respond, but with higher cylinder pressures (otherwise it wouldn't have the extra power at the same rpm) any detonation is going to be harder on the engine.