RS3 8V: One step at a time

[fagin]

Last piece of the fabrication jigsaw was made and fitted today by the in-house fabrication team at Litchfield...... a nice “little” boost pipe.

New engine was fired up late this afternoon.... dyno time very soon!

[chunky79]

Nice work. What are you hoping for power wise when it hits the rollers?

[fagin]

Nice work. What are you hoping for power wise when it hits the rollers?

Hard to say..... like most things in this game, it will do what it will do.

Still plenty more things to do tbh as this is just a step (albeit quite significant) to where the car needs to be to reach it's full potential.

At the moment I'm going to be limited by the fuel system I have, so I doubt I'll have the potential to max out much above the GTX3576 which will go on first. That could net around 650bhp on 99.

Already looking at secondary injection to enable me to push the 3582 and 3584.

It will be fun finding out what I can achieve at each step.

[English expat]

Just read from beginning to end, epic thread and a really interesting read. Looking forward to your next post.

[fagin]

Went over to Litchos yesterday to see the car and personally fire her up! I haven’t done that for a while!

They have a small snagging list to sort over the next couple of weeks and then the intention is for me to use the car and get some feedback to Iain before it goes back again. They’ll then pull the turbo kit off and get it sent away to be dimple heat shielded , once that’s done Iain will turn the wick up to 11 on the 3576.

We’re assuming the current fuel system will cope enough to max out the 76 (we’ll find out soon enough) but I’m currently looking at secondary injection and LPFP upgrade now as I’ll certainly need this to exploit the 3582 for when that goes on, let alone the 3584. A couple of options exist.

Once I’m in a position to do so I’ll start posting dyno and acceleration data on the 3576 setup, that’s when the fun really starts for me!

I’m aiming to keep the car as OEM looking as possible, both outside and under the bonnet. I’ve decided to retain the stock “horrible” wheels and going to put the front number plate back in its original position.

The engine bay looks Uber understated currently..... I think I’m going to junk the REVO intake and get a custom made black crinkle painted inlet pipe made up. Full stealthfest!

Looking at my engine bay you wouldn’t know it had a 3576 and custom manifold strapped on the back of it.



Oh.... and I did take it out for a “gentle” punt yesterday, but more on this when I have some real world data to support any subjective comments.

Looks like the 3582 is trying to get in on the act already! Your time will come soon enough son!

[DavidRS4]

Mega!

[fagin]

This setup is definitely fighting me at every opportunity!

We’ve now fitted the GTX3582R GEN2 and VIS HPFP wouldn’t play ball. Fuel pressure was dropping to 105-110bar so didn’t allow us to use anymore than 1.3bar boost. LPFP and injectors were fine via logs and it appears to be the VIS HPFP. The pump was secondhand to be fair (lessons learnt).

After a number of conversations the recommendation was to either go with the latest 12.1mm LOBA or the APR unit. Due to being able to track down a LOBA unit (thanks goes to MRC for this!), we now have this baby in hand.

Time to fit and crank that boost up!

[Paulm]

Cracking build

[fagin]

So.... LOBA HPFP fuel pump has been fitted and the car was put back on the dyno Wednesday evening for a quick sanity check. I think we can say fuelling is back and what a difference it has made! Just a sneak peak at some interesting info so far. 622bhp at the current rev limit of just under 7400rpm. On 99oct fuel at a paltry flat decked peak and held 1.25bar and 40% wastegate duty! As you can see the power is still on the rise even as the rev limit kicks in. Can’t wait to crank more boost in and extend the rev limit...... and really see what this GTX blower can do on this built engine on 99oct fuel! Full graphs when we get some real power.

[DavidRS4]

That is insane.

[fagin]

For the moment this is where my RS3 8V.1 will be. 654bhp on the GTX3582 GEN2, on 99oct fuel and sub 1.5bar of boost at peak power. We are now all out of fuelling capacity but at a safe level on stock DI (it did make 675bhp but turned down slightly for safety on the fuelling side).

This project has fought me at every BHP, but now it’s time to have a bit of well earned fun for a couple of months.

This is on the stock airbox, Forge FMIC, GTX3582 with .83 hotside, Nortech turbo kit, Peron supplied TVS Stage 3 DSG, Litchfield forged engine and 99 fuel @ sub 1.5bar boost at peak.

Let’s hit the tarmac for some summer fun, before we get back on it over autumn.

Port injection to go on and then we’ll push the boost to 2bar. Once that’s been done we’ll stick the 3584RS back on. Then if that’s not enough we’ll see what it will do on E85!

Plenty more left to do and a lot of headroom left in power. See you all again in 2030!

[Paulm]

Awesome @ 1.5 bar

650 on stock injectors??

[audinick]

Insane power!

[fagin]

Awesome @ 1.5 bar

650 on stock injectors??

Yep... stock injectors. Only change on the fuel system has been the latest LOBA 12.1mm HPFP.

[Paulm]

Awesome @ 1.5 bar

650 on stock injectors??

Yep... stock injectors. Only change on the fuel system has been the latest LOBA 12.1mm HPFP.

Good to know, thanks