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Thread: Time for a build thread....big turbo

  1. #521
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    Quote Originally Posted by S3Alex View Post
    There's the Peloquin and also Wavetrac diffs but I have no experience of either whereas I do rate Quaife not only from personal experience but a lot of rallycrossers use them.

    If anyone is going to break a diff it would be those guys.

    The general opinion seems to be for circuit racing that a ramp diff would work best whereas for road use or variable surfaces the ATB type diff scores best.

    I'd need to ask AMD who did the gearbox rebuild as it was a specialist in Kent who did the work.
    Uprated bearings and new selector forks and synchros.
    I've got both the front axle and rear axle Peloquin LSD's

    Been fitted for 2yrs now and been used on pretty much every type of surface

    Slowly making my way through your thread - epic stuff

    Been hatching a plot to convert my GT to GTX (want more hp without sacrificing spool, so not as much hp than you're going for)
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  3. #522
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    Quote Originally Posted by snow_muncher View Post
    I've got both the front axle and rear axle Peloquin LSD's
    Welcome to the site.

    Woah bet that's fun
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  4. #523
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    Thanks

    Been a lurker for a while

    The diffs where worth every single penny

    I'm currently on a Blue haldex, but have concluded the HPA will work much better with a rear axle LSD
    due to diff unload on release of drive to rear axle when braking with the blue

    tbh Surprise Gary Peloquin hasn't released a version for later haldex units yet
    Last edited by snow_muncher; 3rd August 2013 at 12:37.
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    Quote Originally Posted by snow_muncher View Post
    I've got both the front axle and rear axle Peloquin LSD's

    Been fitted for 2yrs now and been used on pretty much every type of surface

    Slowly making my way through your thread - epic stuff

    Been hatching a plot to convert my GT to GTX (want more hp without sacrificing spool, so not as much hp than you're going for)
    Welcome to the site,and thank you!

    One of the things I've found here is you always learn something new,and thanks to your first post,I have.

    I didn't know Peloquin did a rear diff as well,so I'll keep that in mind for another time.

    What turbo are you currently running?

    I've got a GT3071,with 0.5A/r compressor housing,and 0.64A/r turbine.....there isn't any more lag really,than with the stock turbo,unless you're way below the boost,and that comes in around 500rpm higher than the K04.

    Now.....what I've been told is the GTX3076 will come in a bit higher,and with a billet wheel,lag should be minimised,although I've gone for a bigger A/r turbine housing this time,so we'll see what happens.

  6. #525
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    I'm current on a .64 GT2860RS

    Owens have given a whole range of options for converting to GTX2863R or GTX2867R, with a 400 - 450 hp power range between the options

    My first thoughts had been to go with a .64 GTX2863R being the direct replacement


    But I'm also upgrading to a braced 2L block with billet crank, so thinking the faster spin up might allow for a bigger turbo

    I want to maintain the supercharger like response of my current setup

    old gray skoda


  7. #526
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    Those should give you decent response and a good bit more flow.

    I think of the two you mention,the 2867 would offer the best compromise.

    I started with a GT3071 and now feel that it's a bit wrung out so a GTX3076 would deliver more flow at a similar level of lag and thus much better performance overall.

    That's the plan anyway.

  8. #527
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    I suspect your gearbox is going to need counselling

    old gray skoda


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    Quote Originally Posted by snow_muncher View Post
    I suspect your gearbox is going to need counselling
    It's been counselled and received some support a couple of yrs ago. Lol

    Since then,its behaved and managed to stay out of trouble.

    It had uprated bearings and new synchros and selector forks.

    Also a new transfer case.

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    Bit of a delay......another car has been holding work on mine back,so hopefully next week now.

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    Quote Originally Posted by S3Alex View Post
    It's been counselled and received some support a couple of yrs ago. Lol

    Since then,its behaved and managed to stay out of trouble.

    It had uprated bearings and new synchros and selector forks.

    Also a new transfer case.
    Who did that work?

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    Quote Originally Posted by 15Degrees View Post
    Who did that work?
    I don't know the name,but it's a gearbox company based in Kent,and AMD would have the name and address.

    So far,it's been good,but clearly I don't beat the thing around too much,as I see it as a bit of a weak spot on the S3,given that it was designed with far less power in mind.

    Had you considered a dog box kit for yours?

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    Amazing mate..... I'm a newbie and reading this has made me wanna chuck my standard s3 in the bin ha...

    Keep up the good work!
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    Quote Originally Posted by audi_rs3 View Post
    Amazing mate..... I'm a newbie and reading this has made me wanna chuck my standard s3 in the bin ha...

    Keep up the good work!
    Many thanks.

    I'll keep finding ways to "invest" in this project,but right now I want to get it back and get driving again.

    Due to another customer's car occupying the space mine needs to be in,work on mine has been delayed.

  15. #534
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    Quote Originally Posted by S3Alex View Post
    Many thanks.

    I'll keep finding ways to "invest" in this project,but right now I want to get it back and get driving again.

    Due to another customer's car occupying the space mine needs to be in,work on mine has been delayed.

    Oh man,,,,I know the feeling bro! I can't wait to get mines out & about!

  16. #535
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    Quote Originally Posted by Unitronic View Post
    Oh man,,,,I know the feeling bro! I can't wait to get mines out & about!
    Me too.....hoping for an update today when Ben gets back,and the estimate previously was maybe end of the week.

    Diesels are great in some ways.....wife's DS3 does 60mpg without trying too hard,but it's just not the same.

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    Time for a quick update.

    Went down to AMDTuning after paying all of my current bills(!),and had a look around.

    Got a good look around the Honda BTCC car,and went to automotive heaven....the quality of the workmanship on that car is stunning.
    Every fitting,linkage,upright and even the interior is just pure race porn,and altogether,the thick end of £500k.

    So now,back to something a bit more affordable.

    Car is going up on the ramps today,after a horde of other cars come down,and then it gets pulled to bits.

    Subframe comes off,and the gearbox,clutch and diff come out,to swap the diffs,and get a look at how the clutch is getting on,plus change the release bearing.

    Turbo,downpipe and exhaust system off,to swap the GT for the GTX(and I do have some pics to come later today),and to find the leak.

    New boost gauge ordered.....One of these....





    Not the prettiest maybe,but it does fit the existing holder,AND it runs to 2.5bar,and it's quite difficult to find analogue gauges running to anywhere over 2bar.
    Since the car currently runs 2 bar,and we should get more flow,lower EGTs,and better power from the GTX,I don't see that we'd go beyond what this can measure.

    Rear brake pads arrived today....Mintex 1155s,so that should restore some balance.


    After it all gets put back together comes the difficult part......mapping and running.

    The Revo Stg4 map will stay on,and it's then a matter of getting the car running,checking the boost,fuelling,and timing,and seeing how the WMI system gets on with the new turbo......we're changing to a bigger injector as well.


    Fingers crossed as progress begins.

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    Did you do any head work Alex? This's where you achieve the most power from you'er TFSI? I have picked the same gauges you have, oil pressure & temperature in one gauge with boost gauge. I'm thinking of installing it in the 2 air vents on the dashboard.

    Can't wait to see you'er pics!!

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    Quote Originally Posted by Unitronic View Post
    Did you do any head work Alex? This's where you achieve the most power from you'er TFSI? I have picked the same gauges you have, oil pressure & temperature in one gauge with boost gauge. I'm thinking of installing it in the 2 air vents on the dashboard.

    Can't wait to see you'er pics!!
    Cheers!

    No head work as yet,and I know there's some gains to be had there,judging by what you've already done on yours,and I have to say you've done a superb job.

    I've gone about the build on mine in a sort of sequence of planned projects,as I still use the car every day,and have to fit it into both work and holidays,but the head is another plan altogether.
    It's going to come off for a few jobs,when the new intake manifold is ready.......that's being developed currently,and when it's ready,we can get the head off,get it opened a bit,remove the intake runner flaps,and also maybe change the exhaust manifold as well.

    I don't think there are any specific problems with the ATP cast manifold,as others have got more power from it than I have,but a tubular manifold and flowed head would be better.

    Right now however,the inlet manifold isn't ready,so there's no real point us taking the head to bits until it arrives.

  20. #539
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    I bet the bill payment was painful but just think of all those stampeding, wild horses that are going under the bonnet

    Where are you putting the boost guage, A pillar or somewhere else?

    I wouldnt mind a couple of guages, oil temp mainly but also boost guage too!
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    Quote Originally Posted by Dean_T View Post
    I bet the bill payment was painful but just think of all those stampeding, wild horses that are going under the bonnet

    Where are you putting the boost guage, A pillar or somewhere else?

    I wouldnt mind a couple of guages, oil temp mainly but also boost guage too!
    Hi Dean,

    The current gauge is mounted on a NewSouth pod and looks like this.....









    NewSouth Performance

    The new gauge will fit straight into the pod.


    I think if I go for more,I'll either get an OBD interface and link to the iPhone,or maybe an AEM wideband lambda sensor.

  22. #541
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    Quote Originally Posted by Unitronic View Post
    .....

    Can't wait to see you'er pics!!

    OK...finally.

    This was sitting on the desk down at AMDTuning today.....






    4" inlet,with anti-surge housing.


    The current GT3071 has a 4" inlet,but no anti-surge housing,and surge has been a bit of an issue on part throttle openings.



    Shown here for comparison....


  23. #542
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    So....a few more from now,and the vaults....

    Old turbo hot side....





    And the new one.....




  24. #543
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    And one more...





    The hot side of the turbo above has one of these from my previous turbo.....





    The worry with these is that they retain heat and confine it to the turbo,so you do have to be sensible and allow it some time to cool after a hard run,or go to Owen Developments,and have them build you a turbo with a metal cage for the bearings....which this one has.

    On the plus side,less radiated heat which is another issue,given how close the propshaft runs to all this,and hotter gas equals better flow.
    Last edited by S3Alex; 14th August 2013 at 16:42.
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  25. #544
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    Think you need to put NSFW in the thread title!! Thats pure porn right there
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    Now a happy owner of an A3 Sportback S Line 170 TDI
    My Posh Golf

  26. #545
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    Quote Originally Posted by Rhyso View Post
    Think you need to put NSFW in the thread title!! Thats pure porn right there
    Maybe I should put one of these at the top.





    Anyway.....As you'd expect,I have more.

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    I forgot I'd had these fitted when the engine was being built....turns out they were a very good choice.









    The stock CR on the S3 engine is 10.5:1,and it turns out that these are 9.2:1,so raising the boost isn't going to raise the roof on the engine.

  28. #547
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    hey mate where your pistons head treated with tuff coatings ? still dabbling with what pistons to get leaning towards the wossners though..

    P.S this is real car pron its amazing.. how much HP will she putting out btw are you doing more engine work for the 3076 or have you already put a girder kit on it?

  29. #548
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    Those turbo pictures
    Dean.

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    I don't know what that silver thing is, or what it does, but it looks good and I like it
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  31. #550
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    Quote Originally Posted by leeds2592 View Post
    I don't know what that silver thing is, or what it does, but it looks good and I like it
    If you mean the jacket on the turbo it's a heat jacket.

    Keeps heat in the turbo and not in parts around it so gas flow is improved as well.

    Very useful with the propshafts and transfer case so close.

  32. #551
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    Quote Originally Posted by Sevv View Post
    hey mate where your pistons head treated with tuff coatings ? still dabbling with what pistons to get leaning towards the wossners though..

    P.S this is real car pron its amazing.. how much HP will she putting out btw are you doing more engine work for the 3076 or have you already put a girder kit on it?
    Thanks as always !

    Just stock Wossners. Nothing unusual other than the low CR.
    The block isn't girdled but it doesn't seem an absolute from all the others running this sort of power.

    It runs around 500bhp now so should get a bit more at the same boost on this big mutha.

  33. #552
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    Quote Originally Posted by S3Alex View Post
    If you mean the jacket on the turbo it's a heat jacket.

    Keeps heat in the turbo and not in parts around it so gas flow is improved as well.

    Very useful with the propshafts and transfer case so close.
    Ah right, I see. Tbh, I don't know what a lot of things are in this thread as I'm not technically minded, although I am slowly learning more and more. I still check this thread everytime you put an update though as it's epic!
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    Have none of you big turbo guys thought about the HTA turbos from Owen Developments?
    I run a GT2868HTA on my 106 Rallye and its an extremely impressive turbo!! Makes a GTX2867 look pony! Only down side is the price, but then again you get what you pay for!

  35. #554
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    Quote Originally Posted by sje00 View Post
    Have none of you big turbo guys thought about the HTA turbos from Owen Developments?
    I run a GT2868HTA on my 106 Rallye and its an extremely impressive turbo!! Makes a GTX2867 look pony! Only down side is the price, but then again you get what you pay for!
    I took advice from both Owen and Revo on the specifics.

    Revo's software was developed on Garrett turbos,and it came down to a choice between a GTX3076 and GTX3576.
    The trade off between lag and topend flow,and what I could sensibly hope to do with the 2.0TFSi meant that the 3076 was the best choice overall.

    On yours,you'd be running a bigger turbine than on the GTX if I'm correct,so that would account for the difference,but this is larger again.

    The HTA3082 which would have been an option has a larger turbine than my 3076,but mine has all of the other options and extras that the HTA has.
    Inc the choice of aspect ratios etc and motorsport ball bearing cage,billet compressor,antisurge inlet but it doesn't have the choice of colours.

    The price after mine was built up is about the same as the 3082,so I guess I got what I paid for!


    BTW...your car must be an absolute hoot!......less than 1 tonne?

    Brilliant!

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    Quote Originally Posted by S3Alex View Post
    I took advice from both Owen and Revo on the specifics.

    Revo's software was developed on Garrett turbos,and it came down to a choice between a GTX3076 and GTX3576.
    The trade off between lag and topend flow,and what I could sensibly hope to do with the 2.0TFSi meant that the 3076 was the best choice overall.

    On yours,you'd be running a bigger turbine than on the GTX if I'm correct,so that would account for the difference,but this is larger again.

    The HTA3082 which would have been an option has a larger turbine than my 3076,but mine has all of the other options and extras that the HTA has.
    Inc the choice of aspect ratios etc and motorsport ball bearing cage,billet compressor,antisurge inlet but it doesn't have the choice of colours.

    The price after mine was built up is about the same as the 3082,so I guess I got what I paid for!


    BTW...your car must be an absolute hoot!......less than 1 tonne?

    Brilliant!
    Ah fair enough mate! if Owen's suggest what you got then who's to argue lol!
    I just dont know of too many people using the HTA's and it'd be nice to hear there experiences.

    What sort of figures you looking at once its finished?

    Yea probs sub 900kg. previously it was 385bhp @23psi & 345ft/lb. It had a full interior, but now its stripped and caged with a swirl pot, so should be able to up the boost as i maxed out the Walbro 255 before.

    It's a scary drive EVERYTIME you drive lol.

  37. #556
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    Quote Originally Posted by sje00 View Post
    Ah fair enough mate! if Owen's suggest what you got then who's to argue lol!
    I just dont know of too many people using the HTA's and it'd be nice to hear there experiences.

    What sort of figures you looking at once its finished?

    Yea probs sub 900kg. previously it was 385bhp @23psi & 345ft/lb. It had a full interior, but now its stripped and caged with a swirl pot, so should be able to up the boost as i maxed out the Walbro 255 before.

    It's a scary drive EVERYTIME you drive lol.
    I think that's just brilliant....one scary little car for you,and anyone who's daft enough to try outrunning it.....really seriously good fun.

    I know a couple of people who've used either Precision Turbo,or HTAs and not heard anything bad,so I think in this world,that translates to good overall!

    One guy I know was getting around 600bhp from his TFSi,so that's more than good enough I guess.

    I got a huge amount of advice from Owen's on this turbo,and I couldn't give anything but praise,from the moment I started asking for advice,without being sure I was even going to buy,until it was bought,built,and paid for.
    Absolutely superb throughout.

    I'd be hoping for a start at around the 500bhp mark,which is where we are right now,on the 3071,which is pretty well maxed out,and also producing a bit of part- throttle surge which I try to avoid at all costs.
    This thing should do at least the same power,at maybe 1.8bar,instead of the 2bar I currently run,with lower temps,and no surge thanks to the housing.

    After that,I need to get the head done,but I have a new inlet manifold coming sometime,so the head will come off then,and the inlet and exhaust manifolds can also be changed.

    My car weighs about 1450kgs,so it needs to go on a diet as well(like me)...I can easily lose the rear seats sometime,and then get the carbon wings and bonnet,so that would lose another 90kgs or so,and I think that would be about enough.

  38. #557
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    Quote Originally Posted by sje00 View Post
    I run a GT2868HTA on my 106 Rallye and its an extremely impressive turbo!! Makes a GTX2867 look pony!
    LOL

  39. #558
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    Quote Originally Posted by superkarl View Post
    LOL
    I tell you,that power in that car would make me LOL or maybe worse!

  40. #559
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    Quote Originally Posted by S3Alex View Post
    I tell you,that power in that car would make me LOL or maybe worse!
    i was originally lol'ing at the last comment, but yeh, would be crazy fun.
    I've a friend who was building a gt30 duratec 106, its been about 3 years in the making now and i think he might have given up

  41. #560
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    Quote Originally Posted by superkarl View Post
    i was originally lol'ing at the last comment, but yeh, would be crazy fun.
    I've a friend who was building a gt30 duratec 106, its been about 3 years in the making now and i think he might have given up
    I love the idea of a reasonably stock looking car that goes like hell ....I've tried to keep near that with mine but I'm running out of ways to do that.

 

 

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