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Thread: My minor modding thread

  1. #1801
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    Quote Originally Posted by Scullies View Post
    Hmmmm, yum yum....food for thought
    Why do you have to use the S4 maf housing, couldnt you use a 4" tube, cut and shape it to your needs and fit the MAF directly to the tube. It would reduce the need to silicone joiners

    I think you also need to add an index to your build, the 1st post should have a link to all the specific topics - OK OK, I know I'm being lazy but its takes so long to find things on your build. I have actually book marked a lot of your pages to use as references :D
    4" MAF tube is too large for my setup and have used this setup before on a race car before... idle was a bit rubbish due to large tube and no mesh for laminar flow... not any good for a car used mainly on the road...

    Getting the scaling right on it would take a bit of effort (as it did on the LCR) so why bother with the hassle...

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  3. #1802
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    Quote Originally Posted by Scullies View Post
    Hmmmm, yum yum....food for thought
    Why do you have to use the S4 maf housing, couldnt you use a 4" tube, cut and shape it to your needs and fit the MAF directly to the tube. It would reduce the need to silicone joiners
    Because you need a known MAF tube size with flow straighteners to achieve laminar flow across the sensor, else you get erratic and inaccurate airflow measurements... You can influence the idle of the car by simply blowing into the airfilter such is their sensitivity.
    I have previously tried MAF element into a 100mm alloy pipe, but without many straight diameters upstream (not physically possible in an engine bay) the flow was unstable.
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    Quote Originally Posted by badger5 View Post
    Because you need a known MAF tube size with flow straighteners to achieve laminar flow across the sensor, else you get erratic and inaccurate airflow measurements... You can influence the idle of the car by simply blowing into the airfilter such is their sensitivity.
    I have previously tried MAF element into a 100mm alloy pipe, but without many straight diameters upstream (not physically possible in an engine bay) the flow was unstable.
    and I thought the mesh was to prevent any strange objects entering the TIP
    Another useful lesson learnt

    Would mafless be a better option, I can only imagine it must be very difficult and time consuming to get the map right when running mafless.

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    Quote Originally Posted by Scullies View Post
    and I thought the mesh was to prevent any strange objects entering the TIP
    Another useful lesson learnt

    Would mafless be a better option, I can only imagine it must be very difficult and time consuming to get the map right when running mafless.
    Better option for what though? some have tried with mixed results in the US to go MAF less on ME7... thats mostly due to chasing huge numbers and for cars that will be used mostly for drag strip and/or street racing...

    If building a 400/500 hp road going 20v on std management then there is no reason to go MAF less... RS4 MAF will support over 600hp... by that time a 1.8 would be not be a particularly road friendly car to drive though...

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    My minor modding thread

    It's great that we're still finding new improvements for this little old engine. The tuning boundaries are still being stretched due to new hardware and software findings. It's exciting stuff.
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  7. #1806
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    Quote Originally Posted by Scullies View Post
    and I thought the mesh was to prevent any strange objects entering the TIP
    Another useful lesson learnt

    Would mafless be a better option, I can only imagine it must be very difficult and time consuming to get the map right when running mafless.
    no need not to run maf... its designed for it..
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  8. #1807
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    I looked into running mafless and found it to be a very common mod in the US so people can run atmospheric dump valve.
    Was 531bhp 8L S3 thats going to break the 600+ bhp Club then break something else. Lets see what this OD HTAGT3582r can do
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    for the sake of running a wooshy valve...... Seems like a lot of work...
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    Quote Originally Posted by badger5 View Post
    for the sake of running a wooshy valve...... Seems like a lot of work...
    you'd look and sound well cool on the streets yo.

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    HKS SSQV yeeeeaaah boooiii! (hate the noise they make!)

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    Quote Originally Posted by badger5 View Post
    for the sake of running a wooshy valve...... Seems like a lot of work...
    Running a maf helps drivability, I did drive one without a maf and can say it wasn't as nice with a map with a maf
    Was 531bhp 8L S3 thats going to break the 600+ bhp Club then break something else. Lets see what this OD HTAGT3582r can do
    My S3 Twists Drive shafts for fun.

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    Quote Originally Posted by superkarl View Post
    you'd look and sound well cool on the streets yo.
    Aiiii innit..
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  14. #1813
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    Big thank you to Bill for taking the time to dyno my car today... I pretty much left him to the map changes and stuff today as he has far more experience with it than me so I built engines and kept an eye on stuff letting him work his magic...

    Fuelling needed a little fine tuning as he boost levels rose which I expected anyway... however... my car being my car she did put up a fight... this time the Tial wastegate springs... first runs would net higher boost than subsequent ones as the Tial got hot... guess its altering the springs tension when hot and is highlighted more as we are running open loop boost control... ah well... at least it gives me something else to do lol...

    Anyhoo... scores on the doors...


    A bit more fine tuning to do of course and I need to find a solution to the boost issue... have a few ideas so will see how that goes...

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  15. #1814
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    Nice figures! How much boost pressure?

  17. #1816
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    Quote Originally Posted by BuuBBa View Post
    Nice figures! How much boost pressure?
    26psi currently....

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    awesome stuff

    The all important question though: How does it feel to drive now?
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    Prawns TFSI Turbo'd 1.8T Track Car

    But I know nothing so ignore me.

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    Quote Originally Posted by Prawn View Post
    awesome stuff

    The all important question though: How does it feel to drive now?
    Not really had much chance to give her the beans as yet but the one overtaking move I did do felt well rapid and sounded awesome

    More boost always gives the exhaust a bit of a work out ;P

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    My minor modding thread

    Are you running meth now too Tuffty? I know you had an AEM kit but can't remember if you'd fitted it!
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  21. #1820
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    Quote Originally Posted by Westy View Post
    Are you running meth now too Tuffty? I know you had an AEM kit but can't remember if you'd fitted it!
    Not yet mate... I have a DO kit though... it was never my intention to tune for WMI but I will be adding it once I know the mapping is where I want it and I have (yet again!) got over another small hardware issue lol

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  22. #1821
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    Excellent! Made the magic number today then. Cheers to you and Bill today, my drive back home to work sounded much better with that filter and still did 41+mpg on average.
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  23. #1822
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    bloody hell! that is a result! bet you chuffed, this is a dangerously inspiring thread.lol well done bud.

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    My minor modding thread

    Are you happy now Tuffty or are you hoping for a touch more? It's been nice to see a few builds come together this weekend
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  25. #1824
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    Quote Originally Posted by Westy View Post
    Are you happy now Tuffty or are you hoping for a touch more? It's been nice to see a few builds come together this weekend
    I am happy with the power, less so with the frigging Tial... not sure if its a victim or the cause as yet... most Tial installations I have been involved with are stood off a bit more from the manifold and or on tubular manifolds... mine glows quite nicely so I suspect its getting hotter than it would on a more remote location... the boost is consistent after the first run... drops by nearly 3psi which is quite a bit of horse power...

    One idea is to run the MBC again in parallel and tune the N75 duty to do the boost I actually want using the MBC to cap off the initial overboost hit... the MVS is also water cooled so I could look into that too (not plumbed in as yet...)

    Few options to try including the possibility of making a tubular manifold to my own spec... it will of course be done (if at all) to emulate my existing mani fitment wise so underslung etc but will be merge collector with the aim to flow better top end and improve spool over the existing log manifold I am currently using..

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    excellent news. you've finally hit the magic number.

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    congrats mate was waiting to see the + 400

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    wmi next imho, along with a cooling circuit to the tial somehow

    stabilise temps and engine itself will be more consistent...
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  29. #1828
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    As an interesting comparison... the power curves from mine (GT3071, log manifold, yellow plot), Welly's (FP green, tubular race manifold, red plot) and a stage 1 S3 (custom code, blue plot)...



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  30. #1829
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    Substantial area under the curve. What's stopping it breathing well up high? The log manifold?
    Handling mods++. GTX30 soon-ish. Hiding parts from the mrs since 2011. Build thread

  31. #1830
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    Quote Originally Posted by Sam_ View Post
    Substantial area under the curve. What's stopping it breathing well up high? The log manifold?
    Pretty much yeah... merge collector type manifolds are more efficient for top end power which is why I will look into making one later on... there is a little bit of a 'ramp' in the collector of my log mani but nowhere near what would be needed to stop cyl 1 gasses knocking on the door of cyl 4's exhaust port...

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    balance of runner length and diameters and merge collector vs large bore but short runners of a log type manifold..

    log will spool sooner, when less volume, but when flows high, the lack of narrow angle merge collector tells its tale..
    wellys setup being one of my old ibiza cast off's, hence its performance is race related.. and the original cost of that turbo and manifold alone was >£2500
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  33. #1832
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    I think I found the boost issue... I forgot that I have had the banjo air fitting on the Tial come loose a few times in the past... didn't much of it at the time but check it lunch time and it was loose... again!... so tightened it up for the drive home (will make it more permanent later) and it appears to be holding consistent boost of around 1.7/1.8 bar (didn't look too much as the roads had those annoying 'other' motorists on it!!)... might try and grab a video of the boost gauge tomorrow if I can get the phone secured ok on the window...

    Unfortunately the roads have other issues besides people who think they have to be using it at the same time as me... potholes! and I managed to clip one with a fairly healthy jolt...

    Tyre looks ok, wheel 'looks' ok but the steering feels dead so its definitely knocked something out... typical... as seems to be the way, just as you solve one issue another one takes its place... so will check the tracking when I get over to Bills and tweak accordingly... its the near side wheel that took the hit so should be a case of half a turn and all good again else its back over to Chris Mullins in Glos for a laser alignment... bugger..

    Liquid was showing healthy airflow (assuming I have the scaling right which I believe it is) and tried the 'power gauge' for a giggle..


    Whilst I think its a little optimistic its good pub ammo ;P

    Gonna log a few things tomorrow as now I have boost again I need to check timing etc...

    As I may have mentioned before... its never really finished... :D

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  34. #1833
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    Did a quick video pulling out from a junction on the way to work this morning... more to see if boost was holding as the roads were too busy to watch the gauge and the road at the same time...


    Will have to do a few more vids I think

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  35. #1834
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    Quote Originally Posted by Westy View Post
    Tuffty, do yo think that your mission to keep the engine bay looking as OEM as possible may have hindered your end goal of 400+bhp? The new mods you're planning will obviously change the look of the bay but hopefully get you the power you want.
    Just spotted this post fred (11th December 2011) and chuckled

    Do you think I have pulled it off?

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  36. #1835
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  37. #1836
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    Quote Originally Posted by badger5 View Post
    hooligan
    And rightly so!!
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    Wellyboots, you are quite literally my most favourite pikey in the entire world




  38. #1837
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    Quote Originally Posted by <tuffty/> View Post

    If building a 400/500 hp road going 20v on std management then there is no reason to go MAF less... RS4 MAF will support over 600hp... by that time a 1.8 would be not be a particularly road friendly car to drive though...

    <tuffty/>
    Back to the MAF quickly, which RS4 MAF housing is the one to go for - V6tt or V8 4.2 ??

    I like the vide clip, it inspires me to get off my ass and do some more work on my engine
    Regards the tubular manifold, I bought this cast S/S collector off a guy in the US - only 1 left
    AMS Performance Cast Turbo Manifold Merge Collectors | eBay

  39. #1838
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    Quote Originally Posted by Scullies View Post
    Back to the MAF quickly, which RS4 MAF housing is the one to go for - V6tt or V8 4.2 ??...
    V6 2.7tt

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  40. #1839
    Andrew@A.L.D's Avatar
    Cylinder Head Master

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    Quote Originally Posted by <tuffty/> View Post
    V6 2.7tt

    <tuffty/>
    RS4 2.7tt Maf sensor+tube Bosch part number is 0280218067
    Was 531bhp 8L S3 thats going to break the 600+ bhp Club then break something else. Lets see what this OD HTAGT3582r can do
    My S3 Twists Drive shafts for fun.

    FOR SALE
    Sparco Torino 2 sport seats
    Adjustable FPR from 1-5 bar, 2 sets of Unused ARP 3/8 2000 rod bolts
    , relentless 200 cell cat pipe, Std AGU Crankshaft. Ported & Reconditioned Cylinder head service.

  41. #1840
    AVLO's Avatar
    1st Gear

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    this thread is amazing paul the car isnt just an s3 its a work of art, your car sounds epic in that vid!!

    really love the oem look

    thumbs up to yourself and bill
    BRING ON THE WET WEATHER ​QUATTRO FTW

 

 

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