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Prawn and BigAls A3 Track Car

Discussion in 'A3/S3 Forum (8L Chassis)' started by Prawn, Dec 29, 2010.

  1. Neru
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    Neru Member

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    [Jun 25, 2012]
    Looking forward it.... Yeah I rather improve on the track as well rather than in the straight you seem to be awesome going around corners judging by your videos

    Are you getting much torque steer?
    And what psi are you peaking at
  2. Prawn
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    Prawn My other car is a MINI!!!!

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    [Jun 25, 2012]
    I get absolutely no torque steer at all, but that's probably because I don't have much torque! Haha.

    Boost peaks at 18psi early on to get things going then falls to 16 quickly, holding 16 to 6k then falling to 14 at 7k. There's not much timing in the map to keep cylinder pressures low. Torque peaks at 260lbft, but it holds that right across the entire rev range so ffeels incredibly linear and like an n/a engine to drive :)
  3. Neru
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    Neru Member

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    [Jun 25, 2012]
    Wow 295bhp with 18psi that's crazy these turbos can nearly peak to 30psi, can't wait to see what both of our cars can do with stronger internals
  4. Prawn
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    Prawn My other car is a MINI!!!!

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    [Jun 26, 2012]
    At the point where it's making 295bhp it is only on around 16psi of boost.

    On earlier revisions of the map it was making 312bhp at 16-17psi with a load more timing, but Niki had to de-tune it for the standard rods :)
  5. Neru
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    Neru Member

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    [Jun 26, 2012]
    seeing your build thread makes me so excited, mines still one month away just took the engine out the other day

    Im a bit worried about water meth and running out, im guessing you would recommend it
  6. Prawn
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    Prawn My other car is a MINI!!!!

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    [Jun 26, 2012]
    Having been dead against WMI previously, I changed my mind after the first manifold cracked.

    I'd now definitely recommend it. the car just feels so consistent with the meth running, hot, cold, wet, dry, performance never drops off at all, and inlet temps are always sub 20 no matter what I'm doing or how hot is it. the engine also feels more lively, which is probably a result of the slightly increased timing it's allowed.

    As for worrying about it running out, I wouldn't worry, get the AEM kit like mine and it's got a fluid low warning light that comes on with plenty of warning. the light comes on with about 25mm left in the tank, so plenty for a good few miles or spirited driving home. I'm finding that 1 3.8 litre tank of meth is out lasting a full tank of fuel easily, I don't know how much meth costs out there, but I paid £37 for 50 litres, which mixed 50/50 gives me 100 litres of mixture, so 26 tank fulls! probably enough for 5000-8000 miles of driving depending on how you drive! it's not expensive at all when you do the maths like that :)
  7. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Jun 26, 2012]
    Nick, on the subject of AEMs kit, have you got an inline filter between tank and pump? Only reason I ask is because I noticed that Stacey runs one and he said that AEM recommend it. He also thinks that might be the reason behind my 2nd nozzle failure, said that maybe the nozzle has some dirt in it that's causing the syphoning.
  8. Shane-Ireland
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    Shane-Ireland Member

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    [Jun 26, 2012]
    Good to see this car in the flesh going down the strip at inters prawn.You are **** at launches though :) joke.
  9. Prawn
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    Prawn My other car is a MINI!!!!

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    [Jun 26, 2012]
    Come on Shane, be honest mate, it's not a joke at all is it? I really am ****!

    Then again, I knew before hand that I would be, so it didn't come as a huge surprise to me! 300bhp and FWD in a light car just doesn't seem to work for launches at all!

    Not my cup of tea anyway, so I'm not too bothered, I just wish i could have done the car a bit of justice!
  10. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Jun 26, 2012]
    Bill manages in the Ibiza :whistle2:

    <tuffty/>
  11. Shane-Ireland
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    Shane-Ireland Member

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    [Jun 26, 2012]
    Maybe next year the will having rolling starts,then you can clear up :)
  12. Jason.s
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    Jason.s Active Member

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    [Jun 26, 2012]
    Just try a proper RWYB day once on a properly prepared track. Just have to roll off the line perhaps then give it some instead of an all out launch. Or just get some slicks and end up snapping the driveshafts lol.
  13. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Jun 26, 2012]
    I'm sure I can improve at santa pod with sticky tyres, a better tarmac surface, and a bit lighter ;)

    Prawny, if you're up for a RWYB day let me know as I dont live too far from the Pod now, plus I'm sure Jase will tag along too.
  14. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Jun 26, 2012]
    He just needs more-wheel-drive :p
  15. s3dave
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    s3dave TFSI Hybrid

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    [Jun 26, 2012]
    There is reaction time at the pod fred !!
  16. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Jun 26, 2012]
    I think the one mistake people make on non-competitive RWYB days, is trying to launch on the light.

    The timing doesnt start until you break the beam, so instead of trying to pounce off exactly when it hits green, just stay composed wait for the green, and go when YOUR ready.
  17. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Jun 26, 2012]
    Exactly what I was doing. The time I tried to launch on green I bogged right down and got my worst times from the 6 runs I did.
  18. Reesy
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    Reesy Well-Known Member VCDS Map User

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    [Jun 26, 2012]
    That's the one I have pics of in the pics thread...
  19. StaceyS3
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    StaceyS3 Well-Known Member

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    [Jun 26, 2012]
    Keep me informed if your up for doing a rwyb day as until I've got the new setup on and running I will probably have to steer clear of track days due to the egts :(
  20. Prawn
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    Prawn My other car is a MINI!!!!

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    [Jun 26, 2012]
    I'm sure 13 seconds is long enough for your EGT's to go through the Roof isn't it Stacey?

    Can't wait for my next trackday! Should be doing Keevil on July 16th :)
  21. StaceyS3
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    StaceyS3 Well-Known Member

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    [Jun 26, 2012]
    Through the roof for most people i suppose but as i was saying to someone cant remember who, the temps on the liquid or from the sensor dont seem to replicate the temps of the the hardware as when first getting it really hot (with the engine warmed) it takes longer to get up there and even on a little burst of throttle its not to bad, but say do a few of pulls through the gears back to back and stop for a bit as soon as you get on boost again it rockets straight back up to protection level even thought the egt value was at say 400-500 before hand

    I didn't hit egt protection until my second run back to back and it had only just hit 920 but when giving it some constantly ie on a private road/track i would be surprised if it even dropped below high 800's low 900's as see low 800's when cruising at 80/90 on the motorway :(
  22. Jason.s
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    Jason.s Active Member

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    [Jun 26, 2012]
    Shame you all dont live around here. National motorsport week from the 30th - 8th and if you live in the NN or MK postcode pod will let you run all day for free lol.
  23. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Jun 26, 2012]
    So my Peterborough postcode is no good :(
  24. Jason.s
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    Jason.s Active Member

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    [Jun 26, 2012]
    lol sadly not. Not unless you can get another driving license with an MK or NN postcode written on it :p

    I was going to pop down but then stupidly filled up a full tank on saturday...I only run with less than 1/4 of a tank. Ran the Yaris a full day on the fuel light once too lol.
  25. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Jun 26, 2012]
    That is another thing I thought of yesterday. I did all my sprint runs on 3 quarters of a tank! I'm not sure how much fuel Prawn and others tend to run for track days or sprint runs?
  26. Jason.s
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    Jason.s Active Member

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    [Jun 26, 2012]
    Track days you`ll be on full tanks. When i went to Bedford with some friends most went out at lunch time to fill up having done nearly a full tank in the morning session and one guy in a 500bhp Evo did 3 tanks in a day.

    As they say in F1, every 10kgs in fuel is a tenth of a second added on lol.
  27. Prawn
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    Prawn My other car is a MINI!!!!

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    [Jun 26, 2012]
    I had just under 3/4 of a tank on board when going down the strip. At trackdays I tend to use almost 2 full tanks in a day, so brim it at the start of the day / night before, and that usually gets me to lunch time, then brim it again for the afternoon, and if I'm lucky it'll do the afternoon and trip home.
  28. Neru
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    Neru Member

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    [Jun 26, 2012]
    thanks for the advice prawn im looking at this set-up
    eBay Australia: Buy new & used fashion, electronics & home d�r
    with the 2.5gallon bottle and upgrade solenoid
  29. bigal 1
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    bigal 1 Active Member

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    [Jun 27, 2012]
    The car wasnt built with straight lining in mind. Too much to break in my opinion. It was built for the Ring and going around corners. You did the car justice, you were not silly and did not break anything.
  30. Prawn
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    Prawn My other car is a MINI!!!!

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    [Jul 3, 2012]
    Took the car for a drive over the weekend, going well as always, did some hugely unscientific testing of the WMI and it's effectiveness by feeling different parts of the engine after a thrash, and it's most impressive!

    After a long blast, I jumped out and popped the bonnet straight away. the alloy charge pipe just off the turbo was really hot, couldn't hold onto it hot. This will be partly heat from the charged air, and partly head from the engine bay.

    The hot side tank of the intercooler was fairly hot to touch, nowhere near as bad as the charge pipe under the bonnet, you could hold it, but it was on the upper limit of warm / hot

    the cold side of the intercooler was MUCH cooler, really obvious difference. it felt similar to the bodywork around it to be honest, so the IC is doing a great job.

    then the inlet manifold, and wow, it felt like an ice cold can of beer straight from the fridge!

    proof if ever that WMI is doing an amazing job :) If the air going into the engine is THAT cold then it must be happy!

    Also noticed whilst under the bay that the bracket I made for my charge pipe heat shield had cracked the the shield was wobbling around like crazy. In an ideal world I'd have something welded up properly with a second mount to stop it happening again, but in the short term, I whipped it off, made a copy, then made a mirror image of it too so the bracket is now doubled up.

    [​IMG]

    [​IMG]

    [​IMG]

    This has made it MUCH stiffer, so hopefully should last a bit longer until I get something proper made :)

    Oh, and England is ****, so I'm off to the Nurburgring again next week for a few days!
  31. superkarl
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    superkarl MAN OF STEEL

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    [Jul 3, 2012]
    good to see the mani is holding up well for you.
    bring on the real test next week i guess. safe trip!
  32. Prawn
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    Prawn My other car is a MINI!!!!

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    [Jul 3, 2012]
    Doing OK so far it seems SuperK, still early days yet though, so touch wood.

    More of a social visit than anything to be honest, very last minute and unplanned, just thought about it over the weekend decided I'd go.
  33. Reesy
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    Reesy Well-Known Member VCDS Map User

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    [Jul 3, 2012]
    As you do!

    Hope all goes well mate, and if it's midweek you should get a few laps in to test the beast..
  34. bigal 1
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    bigal 1 Active Member

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    [Jul 3, 2012]
    Be honest, its just that we are stopping at the Ring on our way home and Mum has promised to buy you and frenchman dinner at P K
  35. Prawn
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    Prawn My other car is a MINI!!!!

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    [Jul 3, 2012]
    That's the main reason, the Steak! The worlds greatest race track being 500 yards from the Restaurant is just a bonus!

    Lapping Monday afternoon before you and Mum arrive, then if you've there early enough I can take mum out for a lap to see what she thinks! Then you can take mum for a lap in the A3 and I'll go watch, then the Polo needs to go round to get a sticker too!
  36. bigal 1
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    bigal 1 Active Member

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    [Jul 3, 2012]
    Mum out for a lap, get real. She thinks the acceleration of my Kona is frightening. Maybe some strong drugs and a bag over her head.
  37. Reesy
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    Reesy Well-Known Member VCDS Map User

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    [Jul 3, 2012]
    Jesus, you guys know how to throw a party!! :lmfao:
    Last edited: Jul 4, 2012
  38. Prawn
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    Prawn My other car is a MINI!!!!

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    [Jul 3, 2012]
    I think we should get Mum to Drive a lap in the Polo too, now THAT would be cool.

    I can see it now down the pub....

    ''Have you driven the Nurburgring?''

    ''No?''

    ''Dude, even my MUM has driven the Ring!''
  39. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Jul 4, 2012]
    what you do in your spare time is your own business - :p :D
  40. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Jul 4, 2012]
    Some people were even too frightened to run their car up the strip at inters!

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