Prawn and BigAls A3 Track Car

Because it cost 99p on ebay and that's how it was :laugh:

The door is offset inwards by the width of one of my shelving units, so the space behind it won't be wasted at all, it'll have shelves there :)
 
it is indeed!

We got off to a good start, my lunch was delivered to me via my newly installed door :)

I made a start on pumping out the pit last night too. it's rained a fair bit recently, and since the walls went up it's doubled the rate at which the pit fills as almost everything that falls on the slab is contained and ends up in the pit. there was almost 9" in there on Sunday!

 
What a cracking set up big man.
Secure. Dry
Plenty of storage. Nice one.
So will it have heaters etc? I'm very envious of all this!!!
So anything track sorted??
Car news??
 
Current list of things clogging up my house, to eventually go inside the garage include a heater , a beer fridge, a 32’’ flat screen TV, a PC, a 5.1 surround sound system, 150L compressor, a shed load of tools, and a 17 year old tatty audi A3 :laugh:

Since moving to Eastleigh, I was feeling saddened by the complete absence of decent jet washes, or half decent hand car washes for when I’m feeling lazy (all of the time then!)

To my delight, driving to a supplier last week, I spied a new one that had opened up, less than a mile from my house.

I called in there on Tuesday night before going to the West Meon Hut for Pub Club.

It was run by Indian lads, who all loved the car, and did a good job taking great care of all the delicate bits I had to highlight before they started!



£7 well spent, although by the time we got there, it was dark, so I needn’t have bothered! :laugh: oh well.



Had a good evening, chatting with Rob, Luke, Sean, and Nick (Horne). It was a bit cold, so we didn’t stay as long as usual.

Luke had mentioned earlier in the week that he’d bought me a birthday present. I didn’t expect anything from him at all, but he said that after 6 years of coming to stay with me in Cornwall every bank holiday weekend for the annual party we used to have, he felt he ought to get me something for a change.

If I’m honest, I was expecting something along the lines of a crunchie, or maybe a twirl, or something along those lines.

Needless to say I was VERY surprised when he gave me this:



What an absolute legend!!!! I’ve been borrowing Lukes for a few weeks whilst working on the garage, and he’s kept saying I need my own, but as we all know I’m a bit tight at times, so I’ve stuck with a good old hand screwdriver. Not any more! Thanks Luke :)

Car is going very well. It’s taking some getting used to having it running properly again, the increased urgency and torque everywhere it really quite noticeable.

On the way back from the pub with Rob, I gave it a bit of throttle at one point (one of many :laugh: ), and was shocked by how hard it pulled, I went to pull 4th from 3rd, only to find I was already in 4th, it’s just that much more urgent than it’s been for a long time. Fuelling is good, EGT’s are solid, it’s how it should be for a rare change.

All of this means that there is currently no massive rush to get the ECU fitted. I’ll wait until after ADI, which I still want to attend, then after that there’s nothing stopping me taking my time and swapping it over without any pressure of meeting a deadline.

Right now, the main focus is on the garage. Providing I can get that done, and inside in the dry, then I’ve got the whole winter ahead of me to do car stuff whilst the weather is crap :)
 
I’m not sure at the moment mate, it depends on a few things :) We shall see. I’ll be there though for sure in some capacity :)
 
Since you sorted that leak out Is the car running sweet if so I reckon you should!
Been a very quiet track year! :(
Not to say there's any lack of progress. The garage alone means you can up the antenna with the car work!
 
Does the plans for the new ECU include a GT35 or similar?

Since you've mastered the current 350hp seems the logical progression, another 150hp would be nice wouldn't it :sign yum:
 
Does the plans for the new ECU include a GT35 or similar?

Since you've mastered the current 350hp seems the logical progression, another 150hp would be nice wouldn't it :sign yum:


Not currently no Ant,

Whilst more power would be very nice, there are quite a few strong reasons against it at the moment:

It would require a full head build to even consider it – lots of money I don’t have!

The hardware needed for any substantial jump would cost thousands – lots more money I don’t have!

I already feel I’m at the limits of my ATB diff – more power will make this worse.

It would severely limit options for potential race series I could enter due to strict power / weight caps in most series.

I think currently, money and time would be better spend on handling, by means of less weight, a more aggressive more adjustable front end set up, and swapping out the peloquin ATB for a proper plate diff and accepting that the car becomes less road friendly in search of gains on track.

What I do hope to gain from the ECU is a consistent delivery that’s exactly how I want it and hugely driveable, with lots of safety systems in place that can be altered within the mapping. Having the ability to fine tune and tweak things myself will give me something to do over winter too, not to mention the options for various extras to set up like gear based boost and similar.

Just need to get this garage finished first! Then I’ve got the next decade inside in the dry to modify to my hearts content! :racer:
 
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I've got push to pass.
What you do is push your foot as hard as you can into the throttle pedal, and you pass everything in sight, including the moon
 
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It's ok SK, you can have the whole of the north to terrorise, I'll have the south, and tuffty can have the Midlands :laugh:
 
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Come on boys put your willy's away
 
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Random question - any pics anywhere of how you've set the suspension height in relation to the front control arms and the geometry?

The car looks quite low
 
Random question - any pics anywhere of how you've set the suspension height in relation to the front control arms and the geometry?

The car looks quite low

I'm down in the pit tonight with the wetvac, so I'll try and get a few pics showing wishbone angle for you Ant :) from memory, I havn't a clue how they sit if I'm honest :laugh:

I think the car probably looks slightly lower than it is, as the big 235/45's occupy a LOT of space in the wheel arch.

That said, I found at Combe on the Forge day that it is now too low to run on slicks with the current splitter and spring rates. It needs raising up 8-10mm to run as it is on slicks.

I'm finding that on the soft KW stock spring rates the front end dives too much and the splitter has taken quite a beating, more so than the previous shorter splitter ever did.

Spring rates are on the cards to be changed, but only once I've finished this winters weight loss program so I can accurately work out unsprung weights on each corner, then pick a spring rate based on a desired wheel frequency, but If I'm honest I've got a lot more research to do into that area before I know where I'm going with it!
 
I was speaking to someone recently who was very knowledgeable on suspension.
In fact he sets up race car etc
He said the audi 8l tt range etc should only be lowered around 10 - 15 mm max for optimum handling.
 
Thats why I'm asking, apparently having the car set slightly above horizontal control arms is meant to be the best compromise of CoG, Roll Centre and dynamic camber. Stiffer springs needed to control the roll though.

And yeah KW renowned for using soft rates since most people use them as dual duty.
800lb springs won't be fun regardless off the available damper travel.

I'm quite jealous of your garage, I showed the misses and recieved a string of 4 letter obscenities in return, haha.
 
Where are you?
On a day off from diy myself
Feel wired atm!!!
When will work commerce?
 
Wow, a week has passed and I forgot to reply to all of the above :laugh: poor show!

5 speed with gripper, cracking deal for someone certainly! Not for me though Mr. B, But thanks for the thought!

With the emerald going on soon, and with the car now running better than its run in a long time, I thought it'd be a great idea to get some comparable data for the me3.8 vs k6. I chose to enlist the help of our friendly tamed badger, who was able to fit me in at short notice :) because he's awesome.

:sign plug:

Tomorrow, I'm going to Bills, to have a dyno run to record some decent 'before' data.

Just over 2 years ago at R-tech we saw 368-370bhp / 352lbft, Repeatable against a brake. Slightly more on an interia run but that's not comparable.

14000 VERY hard miles later, what do we think it's going to make?

Baring in mind the torque reading difference, an identical result would be 370/304lbft at Bills.

I'm not convinced it'll still be that high, but if it makes 360bhp in its current condition I think I'd be very happy with it.

Place bets now!
 
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Whatever it is won't make a difference to how it is and how happy you are with it now.

But good luck tomorrow keep us posted! !!!
 
So..... Is the battered old A3 with a peeling bonnet still going strong :racer:
 
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I'm more interested in the data you intend to gather to gauge the benefit of the new ecu.
Is it purely headline figures and shape of curve??
Or is there more to gather that will really show where the ecu shines?
 
It's a bit of everything really Karl, the great thing about Bills dyno is that the car has run there in almost every configuration since going ko4 hybrid 4 years ago, so we can overlay any plot from any point in the cars history and see where it is now compared to where it's been previously.
He also gives a fantastic print out with power, torque, boost, and afr shown on 4 seperate plots which makes it really easy to conpareruns and see what's going on.

By running it today to get a bench mark, we can see from the data what was good on 3.8, and what wasn't working properly. We can also get an idea of how different it is now to when it last ran here 2 years ago, giving an indication of engine health.

By logging on vcds whilst on the dyno it also gives a good indication of where to start when it comes to mapping the emerald. What n75 DC produces what kind of boost levels, and what ignition values the engine will take at all different rpm points.

It's also a nice way of closing out the me3.8 chapter for me. As @Sootpig said it's a miracle I've stuck with the stock ecu this far, so it only seemed right to get a 'final figure' with it before binning it and moving onto better things.
 
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features and control is what will be the main benefit of K6 over me3.8
power is engine/turbo related.

It will make more on K6 than it did on its me3.8 when done to the limit of hardware
 
Bill just curious, what the most you have seen from a ko4-064 on your dyno albeit from a 2.0 TFSI engine?

Just having closed loop boost control and closed loop wideband fuelling will be a novelty on the Prawn mobile
 
I know Bills leon does around 370ish at 20psi.

Results are in thanks to our friendly Badger :)

Big thanks to Bill for taking the time to do this for me, being a supergeek I love data and comparisons, so I'm very grateful :)

The plots! Sadly, facebook has killed the quality of these, because it's evil!



august 2013, running a map for the mold ko4 hybrid, we saw 348bhp and around 280 badger lbft

October 2015, and we see 349bhp and around 280lbft still!



Interestingly, the car actually LOST power with the WMI on, because it is already running far too rich. This is suspected to be due to the change of fuel pump and a possible weakness in the old pump when mapped, as I've alluded to many times before.

On the current plot, we have more midrange than before, but just as the plot is rising nicely, the maf gets near it's limit and the fuelling really falls apart and it plunges into rich territory, killing the turbine energy, which can be seen in the torque and boost plots, and by the way the power curve changes it's trajectory.

The 440cc injectors become very non linear near their limit, and appear to just pour the fuel in as fast as possible, before running out of flow around 6500rpm, at which point it gets leaner again, and boost picks up as a result, ending up with peak power right at the top of the rev range.

Bizzarely, this actually makes it feel really good to drive :laugh:

As Bill says, nice safety features, total control, and the ability to tailor the power delivery to exactly how I want it will be the main benefits.

What I'd like is probably less boost low down, where traction can suffer, and more high up, if it will yield any gains.

Even if the delivery were identical, and the fuelling problems were sorted I'm confident the car would be much better, although it feels ****** fast as it is! More would always be nice :racer:
 
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Good to know whats happening and get a baseline before you start modding it. Would it not be better to have larger injectors to have more control over them when you are putting in a lot of fuel.
 

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