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big turbo?

Discussion in 'A4/S4 forum(B5 Chassis)' started by b5boy, Oct 6, 2012.

  1. b5boy
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    b5boy New Member

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    [Oct 6, 2012]
    hey guys i was just wanting to know whats the best big turbo upgrade to go for i have a a4 b5 1.8t all standard but want a bigger turbo i was thinking t3/t4 but wasnt sure on what was best to go for if anyone could give me any thoughts will help alot
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  3. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Oct 6, 2012]
    Define "best"!

    You need some goals first. Whats best for you wont neccesarily be best for me or anyone else.

    Personally i suspect a T3/T4 would be hugely laggy on a 1.8T and wouldnt really be very nice to drive.

    A GT28RS is likely a good fit for the 1.8T that wont be too laggy, but will offer something like 320-350hp.
    Another option might be a T3 60trim from a Sierra Cossie 4x4, similar in size to the GT28RS but a bit less efficient, should do 300-320hp.

    Ofcourse if you have lesser power goals then a different set of options would be there, and similarly if you want 500hp then it'll be a different set again.
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  4. b5boy
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    b5boy New Member

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    [Oct 7, 2012]
    I would like 300/350 so the gt28rs sounds like the one would it be safe running a gt28rs with a stock engine the last thing i would want is to stick one go down the road and blow the engine
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  5. Sulli79
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    Sulli79 Active Member

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    [Oct 7, 2012]
    Rods would be on the list for me personally, probably intergrated engineering ones.
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  6. b5boy
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    b5boy New Member

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    [Oct 8, 2012]
    Would it be safe to run standard rods
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  7. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    [Oct 8, 2012]
    Id be putting rods in if your over 260hp as i wouldnt want to run the risk of bending one or even letting go and going through the block.
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  8. b5boy
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    b5boy New Member

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    [Oct 8, 2012]
    Cool ok thanks for the feed back ill prob just play it safe for now and get a k04 then think ill go big when i have the cash what's the turbo u got in yours bradderz
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  9. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    [Oct 8, 2012]
    Its a hybrid K04 from frankenturbo but it has slight shaft play so its not getting tuned yet its on stock map got a big list of jobs to do first getting it mechanically sound then im going to be looking into doing a engine rebuild with rods/pistons or may even look at a 2.0 stroker kit but thats going to be a work in progress. I wouldnt even get a K04 before a BT i would do it right first time i sort of regret going hybrid and should of gone straight to a GT28 but we learn from our mistakes i guess but i will get there one day with the car lol
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  10. b5boy
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    b5boy New Member

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    [Oct 8, 2012]
    That's cool which would u says best a k04 or a hybrid k04
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  11. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    [Oct 8, 2012]
    Hybrid will be best option with supporting mods ie 3inch maf 3 bar fpr injectors fmic you should see 260-280hp depending on turbo size, frankenturbo have recently released the F21 longitudinal which has a slightly bigger compressor wheel than the F4 i have fitted, it really is a good bolt on package for just under 1k
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  12. b5boy
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    b5boy New Member

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    [Oct 8, 2012]
    Thats pretty sweet that then ill go and have a look at frankenturbo see what they got would audi s3 or tt injectors be sutable
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  13. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Oct 8, 2012]
    The search for power is a long and expensive route to travel. Be aware other componants will wear out quicker too.
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  14. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Oct 8, 2012]
    Depends what engine you have installed, if you have a DBW APU engine then S3 / TT injectors are fine, if it's an AEB you will need to use some bosch redtops or similar

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  15. b5boy
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    b5boy New Member

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    [Oct 8, 2012]
    Ill prob have to go with the Bosch ones mines a AEB what size cc injectors would suit that
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  16. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Oct 8, 2012]
    depends on turbo/MAF and tuner choice tbh
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  17. b5boy
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    b5boy New Member

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    [Oct 8, 2012]
    Ill just the guys were Im getting the turbo from see what they recommend
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