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Throttle body Mod....

Discussion in 'A3/S3 Forum (8L Chassis)' started by s3dave, Apr 18, 2012.

  1. s3dave
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    s3dave TFSI Hybrid

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    I have a couple of mates who have turned there TBs 90 degrees to aid airflow, ive heard it mentioned a time or two, any body had any good results with this?....;)
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  2. Westy
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    Westy Double Dark Side! Diesel & 8P

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    Try it and do before and after logs for us Dave :thumbsup:
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  3. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    Turned as in 90 degrees so the throttle flap pivots vertically rather than horizontally?

    Seen this done on SEMs and larger (75mm +) TB's but normally this is purely to allow them physically fit rather than for performance... not sure what differnce it would make on a blown engine... its still the same level of obstruction which ever way round it goes...

    <tuffty/>
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  4. s3dave
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    s3dave TFSI Hybrid

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    Yes that right paul, its supposed to feed 3+4 cyl better... if you think of the angle the air is coming in at it may make some sense...?
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  5. ScottD3
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    ScottD3 I want your faulty electronics

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    I can't see how it would make any difference.
    Its all still the same size and in the sameish location.
    Just the angle it moves has changed.

    Be interested to know if it does make any difference.
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  6. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    Does make sense but then a decent plenum would fix that and cyl 4 will always suffer in some way without a decent inlet like the SEM or similar...

    Worth a punt I guess, timing pull may end up being less at a guess as 4 always suffers from the heat...

    Do it, log it and report :)

    <tuffty/>
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  7. ScottD3
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    ScottD3 I want your faulty electronics

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    [​IMG]

    Is this your engine?
    I see what you mean now dave.
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  8. Westy
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    Westy Double Dark Side! Diesel & 8P

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    Ours is slightly different to that on the inlet side of things but yeah you get the point ;)
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  9. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    Thats an inline engine... inlet is different to our transverse ones...

    <tuffty/>
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  10. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    This is why the plenum capacity should be typically 1.5 times the engine capacity for turbo engines...

    <tuffty/>
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  11. Jason.s
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    Jason.s Active Member

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    Yeah thats my engine lol. Wonder if it`d be easy still on a cable throttle..
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  12. Alex C
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    Alex C Active Member

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    are we thinking that cylinder 4 gets more air than cylinder 1 because of the stock TB/plenum design and cylinder 1 is slightly starved of air because its on the far side of the inlet manifold?
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  13. s3dave
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    s3dave TFSI Hybrid

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    other way round...
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  14. Alex C
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    Alex C Active Member

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    ah ok, so the air is rushing/bypassing past cylinder 4? Cylinder 4 is on the flywheel end of the engine right? closest to the TB
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  15. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    Cyl 4 suffers from heat as its where the coolant is hottest before circulating back through the radiator....

    <tuffty/>
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  16. Sevv
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    Sevv Pushing the limits..

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    Paul wondering since we are talking about TB would a r32 TB be better all rounder...
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  17. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    Depends on the application... big turbo, large inlet (SEM or similar) etc then arguably yeah... power level also a factor.. I run 380ish hp on a std 60mm tb and Welly over 400hp on the same... but of course just because you can doesn't make it right :)

    High overall airflow and high boost then I am sure it will make a difference... just not seen much on my setup to argue it either way... will be testing this again when I have sorted my mapping out and ready to go for the larger inlet manifold etc...

    <tuffty/>
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  18. Sevv
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    Sevv Pushing the limits..

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    hmm i see your point i was thinking SEM with R32 tb... for my future build :p and what has welly done differently to you ? stroked it or something :p
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  19. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    His turbo is a bit bigger than mine.... larger turbine....

    <tuffty/>
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  20. Sevv
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    Sevv Pushing the limits..

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    he using a GT35 ? or GT30 or none of the above
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  21. Reesy
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    Reesy Active Member

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    None of the above
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  22. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    FP green IIRC...

    <tuffty/>
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  23. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    I've done this modification and not noticed any gains on the road, I can't see it giving any major gains on the dyno but i'm sure you will see the results if it was tested on a superflow flow bench.
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