Prawn and BigAls A3 Track Car

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Badger 5 Edition...Its all about the flow...
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Prawn

My other car is a MINI!!!!
Shell we reel this in now. ???

:laugh:

Yes! Let's!


So, we went to watch BTCC at Thruxton at the weekend :)









Baby Bear went representing in full Audi dress:




Dad was sad we wernt out on track!



We also met @Rich196 and Kelly there which was great. Rich hadn't met Oliver either, by this time in another automotive baby grow!





Then to top off an awesome day the BMW did what it does best on the way home and decided to spit out another Torque converter leaving us stranded at the side of the 303 for a while until it cooled down enough to limp home :laugh:

Cars are great :racer:
 

Prawn

My other car is a MINI!!!!
In other news, I tested some screwfix no nonsense degreaser on my old scrap head:



For a quick effort, sprayed on with a garden sprayer then jet washed up, I think it's come up grest. And importantly it's done zero damage to any of the Ali and specifically cam bearings.

Bill sent me this teaser earlier in the week:



No going back now!

And I am also now the owner of this:



It's a k430 with a slight clip recently removed from @george_seamons 8p s3. Pre loved and proven beyond 400bhp, I look forward to seeing what it can do on a fully built 20vt!
 

george_seamons

I'm on the naughty step
No clip on it (I don't think anyway, from memory!).

It made 410bhp 402ftlbs, but still had more to give. Absolutely ballistic spool up on my setup, so really looking forward to seeing what it'll do on yours. Pretty confident it'll do 400+, so should be good fun :)
 

Prawn

My other car is a MINI!!!!
I'm hopeful it'll do well!

Even on George's setup at 410 there was evidence of some pretty poor misalignment at the exhaust flange, and that's on a factory fitment.



You can see the carbon buildup where the ports havnt matched on George's engine. Hopefully port matching both the Inlet and exhaust side will really help the efficiency.

Due to the way the turbo drops onto the adapter I'll be drilling the adapter and turbo flange and installing a dowel pin setup to make sure it stays 100% aligned when installed.
 

antwan64og

Registered User
Winning at life :racer:

Any plans to get the suspension set up professionally this time? Wasn't the ride height set to where it looked pretty last time, lol.

Excited to see the outcome of all this!

Technically this car will run forever, it just happens to now be on the 3rd engine and 5th turbo :yahoo:
 

Tj 0785

Well-Known Member
VCDS Map User
Winning at life :racer:

Any plans to get the suspension set up professionally this time? Wasn't the ride height set to where it looked pretty last time, lol.

Excited to see the outcome of all this!

It's like

Technically this car will run forever, it just happens to now be on the 3rd engine and 5th turbo :yahoo:

It's like triggers brush init
 

Prawn

My other car is a MINI!!!!
Technically this car will run forever, it just happens to now be on the 3rd engine and 5th turbo :yahoo:

In my 11 year ownership, including what's about to be fitted:

4 engines
9 gearboxs
8 turbos
7 sets of wheels
6 sets of front seats
8 sets of front brake calipers
2 shock / spring kits
4 sets of coilovers
5 steering wheels
And about 40 driveshafts :laugh:

Triggers broom has nothing on the a3 :racer:

And I wouldn't change it for the world!
 

Prawn

My other car is a MINI!!!!
Any plans to get the suspension set up professionally this time? Wasn't the ride height set to where it looked pretty last time, lol.

Cheeky ******* :laugh:

It was set up by me to a ride height I wanted, checked and levelled on a flag surface using a tape measure.

When I had the corner weights checked they were within 5kg of each other on each axle! And the cross was around 49.6 if I recall. Not exactly bad for a home attempt!

Geo wise, I'll always set it up myself I think as I change the setup topnotch to keep taking it somewhere to pay someone. And if I'm going to race it I need to be confident doing my own alignments.

If I ever reach a point where I'm not constantly changing things, or I start competing, then I'll definitely have the corner weights done properly.

:racer:
 

badger5

www.badger5.co.uk
Site Sponsor
I'm hopeful it'll do well!

Even on George's setup at 410 there was evidence of some pretty poor misalignment at the exhaust flange, and that's on a factory fitment.



You can see the carbon buildup where the ports havnt matched on George's engine. Hopefully port matching both the Inlet and exhaust side will really help the efficiency.

Due to the way the turbo drops onto the adapter I'll be drilling the adapter and turbo flange and installing a dowel pin setup to make sure it stays 100% aligned when installed.

exactly what we did on the one we did a few years ago... only way to ensure the alignment is correct and stays correct during installation. As you have found to the inexperienced/unaware/unwary the misalignment is an undesirable side effect of not doing this. All about the flow cocked up during sloppy install otherwise.
 

george_seamons

I'm on the naughty step
What's more worrying is on the right hand port, the misalignment is left/right, not up/down, so no amount of careful installation would cure that, because the misalignment on installation can only change the up/down. That's an original OEM hotside, so the casting must be off
 

plan_b

Registered User
Hey prawn,
love your build theard. It's one of my favorite in the WWW. You always try to improve the car :rock:

I saw that you already chose the pistons. To be honest I'm not a big fan of Wössners. Buddies had a lot of trouble with them in VR6 Turbos (the piston falls together). The stock cast Mahle VR6 pistons are much better then the Wössner.

The stock 1.8T BAM Mahle pistons (forged!!) are really really good for a production piece. Buddy drove them with a GTX3071@2,7bar and had no problem but sadly the head dropped a valve. In most of our other 1.8T builds (350 - 520hp) we used them and never had iusses.
Germany fastest 1/4 mile Golf with FWD use also the stock BAM pistons. So in my opinion they are good engough for a 350-400hp track tool.


Seb
 

Dubster5

Registered User
The stock 1.8T BAM Mahle pistons (forged!!) are really really good for a production piece. Buddy drove them with a GTX3071@2,7bar and had no problem but sadly the head dropped a valve. In most of our other 1.8T builds (350 - 520hp) we used them and never had iusses.
Germany fastest 1/4 mile Golf with FWD use also the stock BAM pistons. So in my opinion they are good engough for a 350-400hp track tool.
I could be wrong but I believe the block required an overbore due to damage from the last blow up hence the need for oversized pistons rather than OEM
 

bigal 1

Registered User
In my 11 year ownership, including what's about to be fitted:

4 engines
9 gearboxs
8 turbos
7 sets of wheels
6 sets of front seats
8 sets of front brake calipers
2 shock / spring kits
4 sets of coilovers
5 steering wheels
And about 40 driveshafts :laugh:

Triggers broom has nothing on the a3 :racer:

And I wouldn't change it for the world!
:coldsweat::cry::grimacing:
 

bigal 1

Registered User
The old block is indeed being over bored. The Wossner pistons have been used in some epic builds so we have faith in them. Lets see.

This car will be virtually new (to us) when it goes back on the road. Just to recap.
New engine,
New turbo,
Rebuilt gearbox,
New plate diff,
New suspension, with stiffer spring rates,
Better brake discs, and more aggressive pads,
Brake bias valve, (recent)
ABS delete, (recent)
Airflow mods to aid engine cooling.

Looking forward to it. Should be some car. Just have to learn to drive it all over again. ???
 

antwan64og

Registered User
Erm Nick, not that it really matters but those are 82.5mm pistons not 82mm like you said a few days back.

Just mentioned it incase you hadn't noticed, lol
 

Prawn

My other car is a MINI!!!!
Hey prawn,
love your build theard. It's one of my favorite in the WWW. You always try to improve the car :rock:

Seb

Hi Seb,

Thanks for your kind words about the car :) it's always nice to find new people are reading!

With regards the pistons, you're right that the stock pistons really are very good indeed. They have done me well for years, and I'm sure they will do others we'll for a long time to come.

For me though, it's one potential risk I wasn't willing to take, using a piston that's done 100 000+ miles, in a bore that's done similar. If all things were perfect then I'd happily build with stock pistons knowing they're good, but even with careful measuring of the Bores many people are still seeing questionable results when reusing an old bore with just a hone.

The Wossners are recommended and supplied by Bill. Taking his advice has stood me in very good stead for the last 6+ years, so I'm confident this is the right decision for us and the car :)

Erm Nick, not that it really matters but those are 82.5mm pistons not 82mm like you said a few days back.

Just mentioned it incase you hadn't noticed, lol

Well spotted Ant. We decided there were no downsides to going to 82.5mm, so took the extra 15cc as there's no cost difference. We had originally looked at 82mm though, you're right :)
 

fanta

Registered User
You should do a YouTube channel prawn :) you could hack the job in and play with your car paid :)

Sent from my XT1572 using Tapatalk
 
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