[D19NL B]

Litchfield Stage 2 powaaaa haha good going Shaun, let's see how i get on end of April!

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[Shaunee]

Can you work out 30-130mph time as that is a good indicator of a fast car?

TX.

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I haven't got a 130mph run from yesterday as I didn't quite keep my foot in for long enough.  126mph was my vmax yesterday. I do have a log that was done quite a few months ago though, when I had the boost leak. 

 

I have taken the run time from 30-126mph yesterday and compared that to the older run (same measure), and yesterdays run is .5s quicker for this measure.  I then took .5s off the older run and that comes out at 12.47s (corrected) for 30-130mph.  Not exact science, but gives you an idea.

 

 

Here is a table of data from a previous 30-130mph day in the UK (2013).  All data is via a VBOX.

 

Makes interesting reading.....

[Shaunee]

Car has now been booked in to start the long process of Stage 3++++++   development, which will commence mid May.

 

Had an interesting conversation today about turbo options, which may result in me having a substantially bigger blower put on! lol  

 

Some of you may know about some other RS3's that will be going down the full banana route in 2017, so I think it will be an exciting year in the scene over here.

 

Can't wait now!  Let the pain commence!!! 

Edited by Shaunee, 12 April 2017 - 11:22 AM.

[Caney]

Car has now been booked in to start the long process of Stage 3++++++   development, which will commence mid May.
 
Had an interesting conversation today about turbo options, which may result in me having a substantially bigger blower put on! lol  
 
Some of you may know about some other RS3's that will be going down the full banana route in 2017, so I think it will be an exciting year in the scene over here.
 
Can't wait now!  Let the pain commence!!! 

are you uprating the engine internals and gearbox?

[Shaunee]

The DQ500 gearbox is apparently extremely strong, so no plans to touch that. Torque will be limited if required.

Engine wise, depends what blower I end up with and how far I end up pushing things.

Another RS3 using an older version of turbo I may be using, is looking at cranking it up to 650bhp initially when it's mapped next week.

I'll see how he gets on.

[Shaunee]

OK... things have suddenly snowballed since a long conversation yesterday with Iain Litchfield.

 

As with most plans, things will undoubtedly change and this stuff will be far from straight forward.  I've been down this route before, and it can be painful.  Hopefully it will be worth it though.

 

The plan is:

 

May

* Test the new v2 Stage 2 map on my car to see how it responds

* Get Syvecs up and running on the current set-up

* Get the pipework made up for a full frame GTX turbo (this might be optimistic for May)

 

Date TBC

* Start testing turbos, currently looking at three different specs (upper limit will have the potential for well over 700bhp, assuming we can get a specific blower to fit, but obviously not on stock engine)

* Start looking at building a forged bottom end, including custom pistons

* Look at the possibilities of having a billet block made

 

I'm tentatively looking at getting some serious power out of this lump (as the end goal).

 

Need to assess costs and logistics first though, so plenty to sort out and a lot to do before even getting to any engine build stage.

 

Should keep me busy for a bit though. 

 

In the meantime, if any knows or hears of a scrap 2.5 block available and a set of stock pistons (even with mild det on the crown for instance), could you please PM me.

 

Will be looking at starting the piston design, getting a deck plate made up so the cylinder liners can be honed properly, and also look to "section" the block to see how strong it is.  Then scan the block for a billet block build.

 

I've also been offered these carbon ceramic puppies..... although I haven't been given a price yet, so need to see if this is going to be stupidly expensive before diving in.  Look Gucci though, even if my pocket ends up not being "agile" enough! 

 

 

 

Will also need a new set of wheels, which I've also located. 

[Fivepotfan]

Have you considered 'built' units from companies specialising in the 2.5 tfsi engine? I'm guessing that its the exploring what works (and maybe what doesn't) and developing it for yourself (and Litchfield of course) that is part of the fun of the build process.

  

Iroz Motorsport do some crazy power options on their engines (way over 850bhp) and have a range of turbo and software options depending on what power you are looking to achieve.

 

http://www.irozmotorsport.com/

 

Gonna be be some good forum reading in the coming months!

[Shaunee]

Being honest Brian it's not my bag to do this off the shelf, I like to work with others to do it my way from the ground up.  I'm more about the journey, testing and data, than the final results.  

 

I'm not naive enough to think I'm probably seen as an underdog, but that spurs me on as well.

 

A plan is one thing and what happens could be something entirely different, so we'll have to see how this pans out.

 

This is me though.  This is what I do. 

 

It's going to be very interesting to see how this pans out...... step by step.

[Chungster]

Brave man Shaun, but this is why we all love modding! I'm gonna look forward to reading this next chapter


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[Shaunee]

First things first.... spark plugs.

 

Just ordered a set of the NGK R7438-8. Not cheap at £30 a plug, but I've heard a few stories of others like stock and denso plugs dropping tips.  Can't afford that going on, so need to buy something I can trust.

 

These are an 8 graded heat range, so one step colder than stock iirc.

 

[Fivepotfan]

Been looking at spark plugs myself recently and trying to understand all the technical stuff behind the different heat ranges etc (something I have never really taken a close look at)

 

Any chance you could explain the differences/advantages of running the different graded plugs with stages of tune?

[RS3Dell]

Brian

NGK & Denso the higher the number eg NGK 8 or 9 is a colder plug then a 7 The plug gets rid off the the heat from the tip quicker than a plug with a low heat number eg 7.

A standard RS use a 7 heat range plug in NGK but when going to say a stage 3 tune you might use a 8 or 9 to offset the increase in combustion temperaure.

Hope this is of help mate 

Dell.

[Shaunee]

What he said.

 

TBH.... you don't need to change plugs on Stage 2, but it may be advisable to swap out every 10k regardless.  At Stage 3 (say 500bhp) it's more about added protection with the increased heat.... and not risking the tips falling off.

 

However, if you go too cold a plug for a daily driver they can foul up easier. 

Edited by Shaunee, 16 April 2017 - 06:56 PM.

[Fivepotfan]

First things first.... spark plugs.

 

Just ordered a set of the NGK R7438-8. Not cheap at £30 a plug, but I've heard a few stories of others like stock and denso plugs dropping tips.  Can't afford that going on, so need to buy something I can trust.

 

These are an 8 graded heat range, so one step colder than stock iirc.

 

 

Interesting to see how the tip is recessed into the plug body and the angle of the electrode compared to the standard Audi plug below (the pic is a plug thats done nearly 9K miles in my engine)

 

[micloi]

I do not know if it helps but for stage 3 on the S3 engine the -9 NGK's are needed, -8's cause misfires.

[Shaunee]

I do not know if it helps but for stage 3 on the S3 engine the -9 NGK's are needed, -8's cause misfires.

 

Apparently on the 2.5, the 8's are fine.  They better be. 

[Shaunee]

Yeah yeah I know…... I said I wouldn’t be doing anymore Stage 2 updates, but I couldn’t help myself being drawn back to the strip to see if I could bag an 11.4 quarter.

 

Santa Pod Peak Performance Test & Tune

I attended what is known as a “Peak Performance Test & Tune” yesterday.  

 

What’s that I hear you say!

 

These are predominantly “during the week” events where they specially prep the track to ensure it has more grip than normal.  This is done by spraying the track with for want of a better word “adhesive”.  This greatly benefits cars that are either front or rear wheel drive, and on top of that are running drag radials.  Traction is always key down the strip, so this type of track prep really helps these types of cars.  Unfortunately it’s not as good for AWD vehicles in my opinion as traction is not normally an issue apart from the start line.

 

You normally find that whilst you can gain better launch traction, you’ll end up losing time down the rest of the track as you have increased tyre drag due to the increased track prep.

 

It was something I wanted to try, as a better launch would certainly help me, but that may be negated by slower acceleration times for that rest of the run.

 

This drag stuff isn’t straightforward….. Especially when you’re hunting down those last few 10ths!

 

Temps were around 14degs yesterday, but there was a headwind which isn’t something you want.

 

Unfortunately I suffered with not being to get the grip off the line I expected.  However, I managed to consistently get 11.6’s passes in the 118mph range which is still very good, and consistency in times is always a good thing.  These three passes ranged from 11.66 to 11.67’s… a whole 1/100th difference!

 

 

I needed to see where I was losing time.

 

This is where the VBOX data logs come in handy.

 

If we compare the 0-100mph on the quickest run from yesterday (11.66) against the previous data obtained when I managed the 11.55s pass, things start to become clearer.

 

11.55s pass 0-100mph

 

Yesterdays 11.66 pass 0-100mph

 

That’s 2/10ths difference.

 

So let’s look at the actual VBOX graphing log to see if we can see where it’s losing the time.

 

 

Taking the highlighted circles from left to right, the first circle highlights a struggle with traction on launch as green G line takes a while to hit peak G.  The second circle highlights an instant drop in G’s, which causes a slight dip in the red line (acceleration curve).  This happened at the gearshift point from 1st to 2nd, which I suspect was caused by the car bogging down due to the grippy surface.

 

Whilst it hasn’t done it until it does it (sounds obvious), I’m extremely confident that on the right day this car will do an 11.4s pass.  If you take the 2/10ths I lost off the 11.66 (in comparison to the 0-100mph on the 11.55s pass - especially as we can see the reason above), you come back with an 11.46s pass.  All theory clearly, but it has the potential in my opinion.

 

Anyway…. Apart from the track conditions hampering the runs, which I can’t do anything about, the day proved interesting.  I’m very happy with the consistent running on the day.  However, suffice to say I won’t perhaps be bothering with another Test and Tune day.  I will stick with the normal RWYB days.

 

There is a remote possibility that I’ll be running the car again on the 30th April, as a number of other RS3’s are attending the Pod for a meet up.  It’s doubtful and will depend on conditions on the day.

 

Stage 3

I have some parts turning up this coming week, so more info on those once they’re delivered.

[deepspacemillar]

Just an aside, Shaunee - since I swapped my front tyres to the Pilot Sport 4 S I've noticed the grip is vastly better and the launches in particular are savage.
Where before at least half the launches would noticably bog down and I'd get axle tramp, now I have no problem and get consistent, repeatable launches every time. I didn't expect it to be so noticable a difference but I've been very impressed. My launch times are not measured, but they feel much faster.

Regardless, those are great times you're seeing mate, can't wait to hear your stage 3 escapades!

[Shaunee]

Just an aside, Shaunee - since I swapped my front tyres to the Pilot Sport 4 S I've noticed the grip is vastly better and the launches in particular are savage.
Where before at least half the launches would noticably bog down and I'd get axle tramp, now I have no problem and get consistent, repeatable launches every time. I didn't expect it to be so noticable a difference but I've been very impressed. My launch times are not measured, but they feel much faster.

Regardless, those are great times you're seeing mate, can't wait to hear your stage 3 escapades!

 

In all honesty I'm steering away from tyre changes at this point, or even for Stage 3 (at l;east until they need changing because they're shot).

 

You can't really compare road tarmac with drag asphalt, as they are completely different surfaces.

 

If I launch on the road I get a bit of spin, which is fine as it's very clean.  I prefer a bit of wheel spin as it eases transmission shocks.  On the drag strip it's a bit more complicated due to differing grip levels.  It's difficult to get that balance between a bit of spin and no bogging. 

 

I have the in-gear grunt without a doubt, but it will always come down to how well I can hook up the launch and the first 60ft.

 

Track conditions can vary from one event to another, but I'm pretty good now at assessing conditions on the day to know whether it will be a good track or not so good.

 

One of the areas I'm looking forward to with Syvecs is the level of control you can have with launch strategies.  You can setup various launch maps and switch between different ones on the fly.  I'm going to aim to try and achieve 1.6's to 60ft with Syvecs on the strip, but whether or not that will be achievable will remain to be seen. 

[Shaunee]

I forgot I had data from Aoon's 500bhp (Stage 3) equipped RS3 when he ran at the Pod last year.

 

He managed a 11.38s @ 122.40mph (60ft was 1.78s).

 

Increase in traps is to be expected with the extra HP he had, but it's not a million miles away from my PB of 11.55 @ 118mph. 

 

Mine appears to be punching well for it's level of tune. 

 

It will be interesting to see how the car performs with the next round of mods, although it's probably unfair to term it as Stage 3 (based on the power level that is hoped for).