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  1. #1
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    whats the best turbo for achieving 400 bhp or should i just go hybrid

    hey all,

    i am taking my car off the road shortly and i am looking to upgrade the turbo , i hope to achieve around 400BHP and was wondering which turbo is best for this, i understand that it isnt down to the turbo alone and all the ancilliaries will need to be upgraded as such.

    The problem is i dont want to end up spending a **** load of money and only end up gettin say 30 bhp more than hybrid because ive chosen then wrong kit etc !

    also has anyone ran the 1.9tdi crank for long, i understand this is a way to increase the stroke but is it good for reliablity etc ??

    Cheers for any help

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  3. #2
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    dont go hybrid many guys are having issues, just get a gt28 or gtx3071 or something

  4. #3
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    t3 gt3071/76 will prob net you 400.

  5. #4
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    That'd be more than capable
    Handling mods++. HTA3582 stroker soon-ish. Hiding parts from the mrs since 2011. Build thread

  6. #5
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    Andrew has had a fairly iffy time with a tdi crank and personally I think normal stroker is more than enough...

    GT3076r flows a little too much too soon on a 1.8 so would need a stroker to make the best out of it although it can be mapped accordingly and have seen good results... nicest setup I have seen to date is a normal 2008cc stroker (TFSI crank) with TSR tubular v-band mani, GT3071r with a billet comp wheel and 0.82 Tial v-band hotside... a nice easy 450+hp which 20psi of boost at 3.5k rpm

    To get this sort of power (anything beyond a hybrid tbh) will cost money to do right... all the high power builds I have seen have had proper built engines including full valve train etc (not cams though), tubular manifolds and large inlets so not a cheap option... I have learnt the hard way that if you want power then you have to do it right...

    Its not just about the largest turbo to do the job as if the rest of the engine can't do anything with the airflow you could bolt a GT35 on to it and still only make hybrid power...

    <tuffty/>
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  7. #6
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    HTA3017 on tial hotside, external gate........ :D
    Stroker ftw also plot below is the one Tufftys describing

    spool nearly like k04 but muchos power/torque band...

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  8. #7
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    Quote Originally Posted by badger5 View Post
    HTA3017 on tial hotside, external gate........ :D
    Stroker ftw also plot below is the one Tufftys describing

    spool nearly like k04 but muchos power/torque band...
    Bill,

    What would be a sort of rough cost to take a stage 2 car, and take it to the above figures? A drive in/drive out conversion.

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    hey bill ,

    thanks for the p**n , can you clarify how this was stroked i.e crank type piston size?? and where the turbo was purchased ?? if you know, again your input in the matter is greatly appreciated

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    Re: whats the best turbo for achieving 400 bhp or should i just go hybrid

    Mate simples bager5 is an IE. Dealer get urself a 9:1 comp ratio pistons 83mm bore some tuscan riffle rods 2.0 fsi vw crank as tuffty said the rest tubular maifold and a gtx3071r or so ull be smiling. Thats what im going through atm

  11. #10
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    a few sellers of HTA, Forced Performance in US...
    Pagparts can also supply a billet gt30... and tial hotside etc etc..

    2ltr stroker tsfi crank, 83mm pistons
    guys build thread is on scn>> James' LCR - 2008cc Stroker HTA GT3071r! BIG Turbo Build - SEAT Cupra.net - SEAT Forum

    happy reading

    as for parts etc to do this, I am indeed an IE supplier who can supply much of the required hardware
    Engine build 1st, then turbo spec...

    power is dependant on budget as always..
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  12. #11
    Rick @ Unicorn Motor Dev.'s Avatar
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    400hp, 2871R woks beautifully

    Rick
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  13. #12
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    whats the best turbo for achieving 400 bhp or should i just go hybrid

    Quote Originally Posted by Sevv View Post
    Mate simples bager5 is an IE. Dealer get urself a 9:1 comp ratio pistons 83mm bore some tuscan riffle rods 2.0 fsi vw crank as tuffty said the rest tubular maifold and a gtx3071r or so ull be smiling. Thats what im going through atm
    Basically identical to what mine will be

    Just need a crank now.....if anyone knows of any for sale (shameless plug) lol
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  14. #13
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    Quote Originally Posted by Rick @ Unicorn Motor Dev. View Post
    400hp, 2871R woks beautifully

    Rick
    Beg to differ....

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  15. #14
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    Quote Originally Posted by Rick @ Unicorn Motor Dev. View Post
    400hp, 2871R woks beautifully

    Rick
    Really..
    never seen one manage that
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  16. #15
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    The only problem i have had with the stroker kit and TDI crank is my choice of piston rings

    I kept on using Total seal rings with the JE pistons and have had nothing but problems with them, I have now swapped to JE pro seals that came with the pistons

    With the TDI crank you will need to machine the pistons s they hit the oil jets
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  17. #16
    Rick @ Unicorn Motor Dev.'s Avatar
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    743347-1&2comp.jpg

    It's a 450bhp rated turbo, so you may have other issues if you are struggling to hit 400

    Rick
    Unicorn Motor Developments. Bespoke Calibration and Remapping Services
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  18. #17
    beachbuggy's Avatar
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    450bhp ?? You reading that as 45lb/min at 65% efficiency?

    A pr of 2.5 at 72-74% gives around 375bhp. Surely that's a true value..

  19. #18
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    Doesn't mean anything in reality... not seen one get past 380hp on a 1.8 20v even with every bolt on accessory known to man... on a 2ltr stroker or larger capacity engine then maybe...

    <tuffty/>
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  20. #19
    RIP S3dave

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    Quote Originally Posted by Rick @ Unicorn Motor Dev. View Post
    743347-1&2comp.jpg

    It's a 450bhp rated turbo, so you may have other issues if you are struggling to hit 400

    Rick
    lol

    its on a comp chart so must be true...



    how many have you actually done? dyno's would be interesting to see....
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  21. #20
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    Didnt Alex`s (AKS) old Ibiza end up close to the 400 figure? Although i never did see a final figure before it got stripped.

    Cactus green 8L S3 - B5 TIP + Jetex, Revised 007p, R32 rear ARB, AP Coilovers, Compbrake rear arms, Full Powerflexed dogbone.

  22. #21
    Rick @ Unicorn Motor Dev.'s Avatar
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    A couple, they weren't on 1.8's but on 2 litre's.

    It's worth noting that Garrett rate it officially to 450bhp. Granted, it's working hard, but certainly worth considering for a responsive engine.

    Rick
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  23. #22
    Rick @ Unicorn Motor Dev.'s Avatar
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    Quote Originally Posted by beachbuggy View Post
    450bhp ?? You reading that as 45lb/min at 65% efficiency?

    A pr of 2.5 at 72-74% gives around 375bhp. Surely that's a true value..
    Not quite but I like your thinking!

    The efficiency is a measure of how much heat is placed into the gas when compressed. The higher the efficiency, the cooler the air. However, we have intercoolers which help to get most of this heat back out. But greater efficiency does mean an otherwise smaller intercooler can be used.

    Rick
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  24. #23
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    Quote Originally Posted by Jason.s View Post
    Didnt Alex`s (AKS) old Ibiza end up close to the 400 figure? Although i never did see a final figure before it got stripped.
    yes, on a maha dyno, same as backdrafts 400bhp 2871 kits
    look closer and see the 340atw figures however, and the 100bhp rolling losses added to make the >400bhp number
    Hmmmmm

    370-380bhp max'd on 1.8t 2bar, runnning effing hot, on 0.63 hotside
    spool much like the GT30... which is'nt working its nadgers off to achieve the same numbers.... I know which I would prefer.

    Never yet seen a 2871 manage more than high 300's......... not even on stroker on 0.86 hotside (380bhp from memory)
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  25. #24
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    There are 4 variants of GT2871 listed on the Garrett website each with different power ratings and are for engine 1.8ltrs to 3ltrs


    Whatever rating it suggests will always be subject to what you bolt it on to and its setup... in context this discussion revolves around a 1.8 20v... not seen 400hp from a 1.8 20v with a GT2871...

    <tuffty/>
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  26. #25
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    are these any good on the 1.8t ?

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  27. #26
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    Quote Originally Posted by badger5 View Post
    yes, on a maha dyno
    Good old Marlin`s.. I`ve seen it over read on my gf`s old 3 MPS but then others swear by it to be really accurate.

    All i know is they strapped a 6MPS down to the rollers by opening the back doors and putting a strap across the back seats, car kicked out when he let off at top end and the guy nearly soiled his pants lol. Same day put a TT on with haldex still running and wondered why the graph was all over the place...

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