Torque Cars

Renault 5 GT Turbo tuning

Discussion in 'Renault' started by BluntyR5GTT, 6 February 2010.

  1. BluntyR5GTT

    BluntyR5GTT Guest

    Messages:
    620
    From:
    stoke on trent
    Car:
    R5 GT Turbo
    This will just be a basic guideline for anyone whos a bit of a newbie to the r5 tuning scene ill admit that im far away from any expert but i do know the basic ingredients.

    I think as with any car the first job is to free up the breathing so a nice full exhaust system is in order the bigger pipe bore the better and to compliment this either a full one piece 2.5 " elbow and downpipe from bjr or a slightly cheaper option of the ktec 2.5" downpipe and get your existing elbow bored out and make sure the throat and bend is worked on as well. Also its a good idea to uprate the air filter and if losing the standard air box then try to mount as far away from turbo as possible. As stated these mods are what id class as essential before doing anything else as now the restrictive standard parts of the gas/airflow have been freed up.

    Next its time to get the boost turned up you can do this by either fitting a bleed valve under the bonnet or an in car boost controller (personally id go for bleed valve as its too tempting to keep winding the boost). Once either of these is fitted the most you can safely turn the boost up to on a standard T2 unit is around 16psi and trust me this coupled with the above breathing mods makes for a rapid little car. at this point id like to add that the fuelling will need looking at and possibly different jets either main or 2nd stage fitted also when running more boost a 0.9 air corrector is a good idea to have (i wont keep repeating this about jetting etc as everyones spec and engine seems react different so there is really no rule of thumb regarding which is the best for each level of tune). At this stage its very important to at least upgrade the intercooler to a double capacity one or if funds will allow a front mount intercooler ( adding one of these will gove the ideal place for an aftermarket air filter).

    Now like anyone the craving for more is always there and whilst the t2 is a cracking responsive little turbo its just no good for some serious power increase now there are countless different specs of turbos out there so take your time in choosing one that suits your driving style and what exactly you want from the engine. Iv personally gone for a hybrid t25/t2 with a .63 rear this for me is perfect as the lag will not be increased by more than around 300-400rpm and it will give alot bigger gains than the t2 and pull alot better higher up the revs. the most popular turbo i can see is a full t25 turbo now be careful what rear housing you go for as this will add to the lag but for me this is about the limit for a fast road turbo as after this they start to become a bit of a lag monster eg hybrid t25/t3 , t28 but these make serious power so if your going for a drag or track car these are going to be best.

    Next we move onto cams and headwork now iv done quite alot of asking about on this and im told unless you want 200bhp or more then dont bother, also that a piper ultimate road 285 cam wont really work well with anything less than full t25 @ 20psi i cant comment on this as iv not tried it but this is the general feedback i got. I know piper do the fast road 270 cam and maybe this would work with the hybrid t25/t2 turbo at around 18psi but again this is something im unsure of unless i try it ( wink wink). Also headwork regardless of what anyone says if you have the head off for any reason is a must as a better flowing head is always going to be a benefit no matter what the level of tune your engine is also why the head is off make sure you replace the gaskets with a group A gasket set.

    Now obviously like with most cars its a good idea to get the suspension uprated either with lowering springs or a full kit and always look at upgrading the brakes either by fitting better discs and pads or going for a big brake upgrade.
    If your a bit more serious then fit front and rear strut braces this will also help stiffen the chassis and no doubt help you if doing trackdays etc and lets be fair the 5 gt turbo is one awesome track toy once set up right. keeping on the trackday lines even though the 5 gt turbo is a light car (around 830-860kg) then a bit of weight loss can be had by removing the back seats and even adding perspex windows then its an ideal time to get a nice cage in there this will really help stiffen what already is a great little chassis up.

    As said this is a pretty basic guide if anyone would like to add or comment on this that would be great and appreciated
     
    obi_waynne likes this.
  2. obi_waynne

    obi_waynne Administrator Staff Member Moderator

    Messages:
    41,306
    From:
    Deal, Kent UK
    Car:
    A3 1.4 TFSI 150 COD
    Wow - impresive write up there. I may even use this as an article on the main site.

    Any comments on wheel sizes, tyre selection and brake upgrades?
     
  3. BluntyR5GTT

    BluntyR5GTT Guest

    Messages:
    620
    From:
    stoke on trent
    Car:
    R5 GT Turbo
    cheers fella :) i have mentioned about the brakes in there only brief but if going for big brakes either ktec recing or cgb motorsport do the kit, there are many different sets of upgraded pads and discs for the r5 gtt iv always fount that ebc make good discs and greenstuff pads seem to work well.

    on wheels iv seen 17" on them but it takes alot of work and so i believe loses the handling quite a bit the best size is 15" really and popular renault spec upgrades are the mk1 clio 16v turbines or mk2 clio alloys also ronal turbos look amazing on the 5 gtt but alloy choice is always down to the owner and for me the alloys make or break a car

    onto tyres my personal favourite choice are the uniroyal rainsport 2s someone said to me they are more for the wet to which my response was well compare the days the roads are wet or dry lol, also dont be fooled by that as trust me on this these tyres are better in the dry than any toyo proxes or yoko parada etc, as said this is my choice i just dont rate toyos at all especially in the wet, but once again this comes down to pref choice :)
     
  4. obi_waynne

    obi_waynne Administrator Staff Member Moderator

    Messages:
    41,306
    From:
    Deal, Kent UK
    Car:
    A3 1.4 TFSI 150 COD
    Do you know if Clio GTi brakes will fit for example? Did Renault keep the same hub sizes? (I doubt this a lot though!)
     
  5. BluntyR5GTT

    BluntyR5GTT Guest

    Messages:
    620
    From:
    stoke on trent
    Car:
    R5 GT Turbo
    hmm thats something i dont know but iv not heard or seen anyone do this
     
  6. BluntyR5GTT

    BluntyR5GTT Guest

    Messages:
    620
    From:
    stoke on trent
    Car:
    R5 GT Turbo
    i think the best way to go with the brakes is to go for a big brake upgrade off ktec or cgb as they up it to 285mm on the front :)

    juts like to add another note to the engine tuning if your really serious about getting the best flow then look at getting the inlet manifold ported and de burred as its a tad restritive and even look at getting the carb top gas flowed
     
  7. obi_waynne

    obi_waynne Administrator Staff Member Moderator

    Messages:
    41,306
    From:
    Deal, Kent UK
    Car:
    A3 1.4 TFSI 150 COD
  8. BluntyR5GTT

    BluntyR5GTT Guest

    Messages:
    620
    From:
    stoke on trent
    Car:
    R5 GT Turbo
    no way thats awesome fella :)
     
  9. obi_waynne

    obi_waynne Administrator Staff Member Moderator

    Messages:
    41,306
    From:
    Deal, Kent UK
    Car:
    A3 1.4 TFSI 150 COD
    You're famous!
     
  10. turbonutter69

    turbonutter69 TC ModFather Moderator

    Messages:
    18,967
    From:
    Alone in the dark.
    Car:
    Insignia SRI.
    Article looks good Waynne and makes for an interesting read.
     
  11. BluntyR5GTT

    BluntyR5GTT Guest

    Messages:
    620
    From:
    stoke on trent
    Car:
    R5 GT Turbo
    i wonder who wrote it ?? ;) lol
     
  12. smithyr5

    smithyr5 Wrench Pro

    Messages:
    46
    From:
    warminster
    Car:
    renault 5 gt turbo
    hay blunty. i just got a r5gtt. its had lots done to it and a good 2 inch of papper work with it.
    what i wana know is about fitting a t25 turbo. i have one but not sure bout what i need to fit it in place of the t2. can you help?
     
  13. turbonutter69

    turbonutter69 TC ModFather Moderator

    Messages:
    18,967
    From:
    Alone in the dark.
    Car:
    Insignia SRI.
    You should just need an adapter plate.
     
  14. smithyr5

    smithyr5 Wrench Pro

    Messages:
    46
    From:
    warminster
    Car:
    renault 5 gt turbo
    yeah thats what i was told. do you know were i can get one?
     
  15. turbonutter69

    turbonutter69 TC ModFather Moderator

    Messages:
    18,967
    From:
    Alone in the dark.
    Car:
    Insignia SRI.
  16. smithyr5

    smithyr5 Wrench Pro

    Messages:
    46
    From:
    warminster
    Car:
    renault 5 gt turbo
    thanks mate. il ring them now.
     
  17. smithyr5

    smithyr5 Wrench Pro

    Messages:
    46
    From:
    warminster
    Car:
    renault 5 gt turbo
    just rang them. it bolts strait on. yeeehaaa.
     
  18. turbonutter69

    turbonutter69 TC ModFather Moderator

    Messages:
    18,967
    From:
    Alone in the dark.
    Car:
    Insignia SRI.
    Great stuff mate.
     
  19. BluntyR5GTT

    BluntyR5GTT Guest

    Messages:
    620
    From:
    stoke on trent
    Car:
    R5 GT Turbo
    sorry i missed your message on here mate not been on for a while, most t25 bolt straight on tbh which one are you using ??
     
  20. smithyr5

    smithyr5 Wrench Pro

    Messages:
    46
    From:
    warminster
    Car:
    renault 5 gt turbo
    hay. all i know is its a garret t25.
    if i put a group a carb from ktec. a bigger intercooler. the t25. dose anyone know what sort of gane i will have?
     
  21. BluntyR5GTT

    BluntyR5GTT Guest

    Messages:
    620
    From:
    stoke on trent
    Car:
    R5 GT Turbo
    it aint just as simple as sticking a group a carb on mate dont get fooled by all the ktec marketing, the carb setup is a swine get right but is easily done, what sort of psi would you be running, as its good to sort the 2nd stage and needle out for anything over 16psi.
    also if your only running standard i/c now then upgrade that before you think of upping the boost.
     
  22. smithyr5

    smithyr5 Wrench Pro

    Messages:
    46
    From:
    warminster
    Car:
    renault 5 gt turbo
    yeah i was going to get the i/c carb and turbo fitted at the same time.is there any info anywhere that i can read on how to set it up? a guid sort of thing.
    not sure on the psi really at the mo really need some advice on whats best. was gona fit a spider valve and incar boost guage so i can turn it up for track days and down for normal driving.
     
  23. BluntyR5GTT

    BluntyR5GTT Guest

    Messages:
    620
    From:
    stoke on trent
    Car:
    R5 GT Turbo
    big no no on the in car boost gauge fella, remember this is a carb it can only be set once for fuelling so say for instance you set it up for 20psi then have it at 10psi the fuelling will be miles out on one setting. on the psi front that is down to you 16-18psi seems popular on a t25 but i have seen more. decide on what psi you want then ill help you with the carb set up :)
     
  24. smithyr5

    smithyr5 Wrench Pro

    Messages:
    46
    From:
    warminster
    Car:
    renault 5 gt turbo
    mint. thanxs mate sounds good. wont bother with the boost switch.
    how about 18 psi.
     
  25. BluntyR5GTT

    BluntyR5GTT Guest

    Messages:
    620
    From:
    stoke on trent
    Car:
    R5 GT Turbo
    18psi is good :)
     
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