Scirocco Central

I would like to know what R owners views are regarding when and how the fuel system should be upgraded?

After searching I have read various owners have done mods like HPFP, LPFP, injectors etc. Looking into upgrades on the ECU/hardware and it seems tuners providing stage 2+ Revo or APR only say you need the HPFP.

Can anyone explain at what point further upgrades are needed and what options are out available?

For stage 2+, you'll need a HPFP (the HP pump also helps reduce pressure drops even on the Stg1 & 2 maps). I've gone with the Loba pump, but there are other options out there (APR, Autotech etc). You may also require a RS4 HP Fuel regulator value at 2+ if you're still getting pressure drops on the HP side of the system.

If you want to go any further than 2+, i.e. big turbo etc. You'll probably also need to upgrade the LPFP and I believe the only drop-in (ish) solution is the TTRS LPFP.

Luke

I had to change my LPFP when going for stage 2+, replaced with Audi's RS3 pump.

Safer upgrades are the Loba APR hpfp, Autotech you have to update the oem internals, you hear the odd story about all three but Loba or APR would be my choice

A few have done the lpfp upgrade on these engines as were having some issues on Stage 2+, the oem pumps are prone to failure having had one go on a K04 car

Consensus on later CDL engines is the PCV is up to the job so no need for aftermarket like revo offerings

wigit wrote:Safer upgrades are the Loba APR hpfp, Autotech you have to update the oem internals, you hear the odd story about all three but Loba or APR would be my choice

A few have done the lpfp upgrade on these engines as were having some issues on Stage 2+, the oem pumps are prone to failure having had one go on a K04 car

Consensus on later CDL engines is the PCV is up to the job so no need for aftermarket like revo offerings

Firstly thanks to all the replies.

Glad to hear I don't need the PCV replacing Wigit as Regal is my local tuning company (4 miles). They recommend Autotech pumps and initially said I would have to change the cam. After realising the car would be new they said I didn't need to do anything.

On stage 2+ mapping is there any benefit of having uprated injectors for better spray pattern?

I have been looking at the HPA intake manifolds which claim 25-35hp without increased boost, which is of interest as I would like to try for about 400hp if possible on a K04 turbo. They also state it is pre drilled/tapped to take the fittings for multipoint water/meth inj. I'm considering w/m inj but only as a stand alone option and not as additional fuel supply to keep things safe. The manifold would be great but just wanted to hear if anyone has tried one already?

I'm suprised they recommended the Autotech especially now they are APR dealers, most at the moment seem to be favouring the Loba on forums where these cars get modded (strong believer if you want to mod one of these cars you do have to join the darkide of golf forums such as MK5GolfGTI), Autotech you are dependent on the mechanic assembling it from your poem pump, the others come complete

I'd also recommend chatting with JKM down the road in Portsmouth as see plenty of these, also think you need to consider if you are going further in terms of turbos you start of with a mapper who can support you throughout this rather than just to Stage 2+ etc

The likes of Revo and APR are now focusing in the newer engines but GIAC are getting some good reports and Rtech who are focussing on these and also the bigger turbo upgrades

These builds are few and far between on rocco forums and i think the end game determine which route you should start with so you avoid sitting mappers etc

wigit wrote:I'm suprised they recommended the Autotech especially now they are APR dealers, most at the moment seem to be favouring the Loba on forums where these cars get modded (strong believer if you want to mod one of these cars you do have to join the darkide of golf forums such as MK5GolfGTI), Autotech you are dependent on the mechanic assembling it from your poem pump, the others come complete

I'd also recommend chatting with JKM down the road in Portsmouth as see plenty of these, also think you need to consider if you are going further in terms of turbos you start of with a mapper who can support you throughout this rather than just to Stage 2+ etc

The likes of Revo and APR are now focusing in the newer engines but GIAC are getting some good reports and Rtech who are focussing on these and also the bigger turbo upgrades

These builds are few and far between on rocco forums and i think the end game determine which route you should start with so you avoid sitting mappers etc

Do you mean the Autotech pumps are assembled by the tuners?

Yes I will have a look around other forums and will speak to JKM as well. I think the APR pumps are very expensive, especially as I read they buy them in from a pump manufacturer.

I agree on thinking of the end game, but to be honest I'm probably going to go K04 hybrid at most. I looking at only keeping the R until the Mk 4 comes out in 2 ish years and then going full hog on a 4wd model.

Autotech start as a bag of bits, you can read how to make one here, Loba and APR come prebuilt. The question comes down the skill of the builder and what is used as a base pump new OEM or used.

b0rk wrote:Autotech start as a bag of bits, you can read how to make one here, Loba and APR come prebuilt. The question comes down the skill of the builder and what is used as a base pump new OEM or used.

Nail on the head and why I would always go Loba or APR

wigit wrote:

b0rk wrote:Autotech start as a bag of bits, you can read how to make one here, Loba and APR come prebuilt. The question comes down the skill of the builder and what is used as a base pump new OEM or used.

Nail on the head and why I would always go Loba or APR

Hard decision as mine is a brand new OEM pump and Autotech kit is £340 built.

I read on the GTi forum you suggested they had a deal a year or so ago for Loba pumps at £550 ish, although I'd have to see if that's still available. £800+ like some people have paid is a lot though.

I think £300-£500 in the grand scheme of things when you are dealing with a £30K plus car is neither here or there and for me gives piece of mind

wigit wrote:I think £300-£500 in the grand scheme of things when you are dealing with a £30K plus car is neither here or there and for me gives piece of mind

What's the issue when pumps go wrong then?

I see Revo actually recommend customers buying the Autotech for their lvls right up to stage 4.

Stu13R wrote:

wigit wrote:I think £300-£500 in the grand scheme of things when you are dealing with a £30K plus car is neither here or there and for me gives piece of mind

What's the issue when pumps go wrong then?

I see Revo actually recommend customers buying the Autotech for their lvls right up to stage 4.

They are not exactly going to recommend an APR pump given the rivalry, the Loba has been only around a couple of years, Revo show Autotech under their hardware on the website but cannot remember if they are UK importer these days

The typical failure mode is the seal going allowing fuel to mix with oil, this reduces the lubricating properties of the oil and generally results accelerated wear of the cam follower. The slightly concerning element is unless you inspect the components regularly this failure is silent.

TBH the real difference between a self built and "factory" built HPFP is that the factory version will have been bench tested for correctness, the self built will not unless the builder has all the kit necessary and the kit in question costs ££££££££.

b0rk wrote:The typical failure mode is the seal going allowing fuel to mix with oil, this reduces the lubricating properties of the oil and generally results accelerated wear of the cam follower. The slightly concerning element is unless you inspect the components regularly this failure is silent.

TBH the real difference between a self built and "factory" built HPFP is that the factory version will have been bench tested for correctness, the self built will not unless the builder has all the kit necessary and the kit in question costs ££££££££.

Good really and makes perfect sense,

I've decided I will be going for a Loba new pump

Good choice Iv had mine on now for 6 months it's been great shame about the weather!
I'm really looking forward to the summer months diff and stage 2+ set up is going to be great for the track. The Loba guys are great to speak to with a quick service they can post parts directly to the workshop so everything's waiting to go!
JKM fitted mine I'd say Jim's got a great knowledge of these VW engines and could offer you some great advice.

Enjoy 350hp