vts turbo plans

  1. Infrequent Poster Joined: Dec 2006 birmingham Posts: 178 saxo vts
    #1
    hi guys, sold my vts a while ago, but looking to buy another in the next 8 months, but i am without a doubt gonna turbo the thing! my question is what would be the best size turbo to give good power with little lag? also what sort of boost(pressure) psi can you run with standard internals? 6 psi??? thanks for reading.

    oh and just out of interest how much faster is a vts turbo at 6 psi compared to a cammed vts???
  2. Saxperience Forum Bum Joined: Aug 2007 rugby Posts: 3766 MK2 VTS, Ibiza Cupra 20VT
    #2
    not got much knowledge about turbos but

    my cousin has fiat cinq turbo and he uses turbo from 1.7 astra diesel as the turbo is bigger than what most people use from renault 5 turbos etc he also uses very high boost but other mods have been done to compensate this

    i wouldnt go any higher than 5-6psi on standard parts
    even that will prob do damage
  3. Frequent Poster Joined: Jul 2007 Posts: 591
    #3
    All depends on your setup,
    intercooler, turbo, manifold, way its piped in,
    as a low lag small turbo could be laggy if you stick a huge intercooler on it and too much piping.

    theres soo many different factors that theres not just one answer.
  4. Saxperience Post Whore Joined: May 2006 Bedford Posts: 7457 Saxo VTS Peugeot 306 GTI-6 Astra SRI
    #4
    Buy mine. Pt51s are the lairiest cams you can run when turbo'ing. Has the brakes and suspension (and wheels) that you need to go with it

    300bhp is achievable with ease, so that's about double the power of a camm'd VTS
  5. Saxperience Hardcore! Joined: Apr 2006 Ashford Posts: 25611 LY R26
    #5
    ...surely when you turbo a VTS you uprate the camshafts at the same time anyways.
  6. Administrator Joined: Dec 2002 Glasgow United Kingdom (Scotland) Posts: 26097 Chelski Traktor
    #6
    not usually, no real need to
  7. Super Moderator Joined: Feb 2004 Tonbridge United Kingdom (England) Posts: 38236 Vtr, 172, throttle bodied track slut
    #7
    Quote:
    Originally Posted by Soulless View Post
    ...surely when you turbo a VTS you uprate the camshafts at the same time anyways.
    no, you dont want wild cams on a boosted engine or you will have blow by.

    on a boosted engine its more about changing the compression ratio tbh
  8. Saxperience Forum Bum Joined: May 2007 Posts: 4857
    #8
    It depends totally on how its done. A VTS running 6psi could quite easily get a few problems if not done well. Some good examples of a poor turbo setup could get one or many of these problems. The charge could be so hot that it will gain very little or loose power. The turbo could be restrictive and you will loose power. Compression could be to low and loose you power across the bored. You can get detention. You could run rich or lean and loose power. You could get a very lagy setup. A tiny power band is a common problem. Even with only 6psi and so on. Basically it could be shit or even destroy it self from even such small amount of boost.

    But a well done boosted car with 6psi would give you gains in power right the way from the lower end of the mid rev range right the way up to the top. You would still get good fuel economy low down in the rev range and the car would run virtually the same as a standard car lower in the rev range. You could quite easily get over 150bhp from even as little as 6psi.

    Get it mapped well (be it stand alone, piggyback or remap)
    Get the correct charge unit (be it super or turbo charge)
    Get the cooling sorted (water, oil and charge)
    Get the air control system sorted (be it dump valve and wastage on turbo or air bypass on posative displacement supercharge)
    Get it fitted properly (don’t take short cuts)
    Get good parts (avoid ebay or boy racer mags)

    Get all that sorted and you will have a great car that will show up cammed cars all day long.
  9. Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi
    #9
    Quote:
    Originally Posted by Berg View Post
    not got much knowledge about turbos but

    my cousin has fiat cinq turbo and he uses turbo from 1.7 astra diesel as the turbo is bigger than what most people use from renault 5 turbos etc he also uses very high boost but other mods have been done to compensate this

    i wouldnt go any higher than 5-6psi on standard parts
    even that will prob do damage
    if he is using a diesal turbo on a petrol engine it wont last very long, they are made from different materials. plus a diesal turbo is designed to run on an engine with a rev limit of about 4k, not a petroll engine that revs circa 7k. his build sounds rough as fuck to me.

    dampcave - yeah reckon 300hp is easily done on a vts? you need some deep pockets to get that much power imo.

    i would go for a T28 off a 200sx. cheap and easily available.
  10. Saxperience Post Whore Joined: May 2006 Bedford Posts: 7457 Saxo VTS Peugeot 306 GTI-6 Astra SRI
    #10
    Quote:
    Originally Posted by williamsvts View Post
    dampcave - yeah reckon 300hp is easily done on a vts? you need some deep pockets to get that much power imo.
    I never said it was cheap, but there are a few about touting those figures.
  11. Saxperience Forum Bum Joined: Feb 2007 Portsmouth Posts: 2882 54 Audi A4 Estate 1.9TDi
    #11
    right correct me if i am wrong but cant you supercharge and turbo a saxo at the same time, like a jagaur. I am sure i have heard of it somewhere on other cars as turbo and superchargers work differently
  12. Saxperience Post Whore Joined: Mar 2003 United Kingdom (England) Posts: 7064
    #12
    Quote:
    Originally Posted by VTS_Pjsaunders06 View Post
    right correct me if i am wrong but cant you supercharge and turbo a saxo at the same time, like a jagaur. I am sure i have heard of it somewhere on other cars as turbo and superchargers work differently
    You could compound charge a Saxo, but the engine bay is cramped enough as it is!

    There are a couple of compound charged cars vw golf GT, an old Micra!
    Jags are just S/C!
  13. Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi
    #13
    you could compound charge any engine. doubt you'd have teh room on a saxo though. ou'd need deep pockets aswell.
  14. Frequent Poster Joined: May 2006 Posts: 691 Mk 1 VTS poseidon blue
    #14
    Quote:
    Originally Posted by VTS_Pjsaunders06 View Post
    right correct me if i am wrong but cant you supercharge and turbo a saxo at the same time, like a jagaur. I am sure i have heard of it somewhere on other cars as turbo and superchargers work differently
    You could bodge a gearbox and pulley to a turbo… then you’ve got a supercharger and a turbo in one … a cheap rotrex!
  15. Super Moderator Joined: Feb 2004 Tonbridge United Kingdom (England) Posts: 38236 Vtr, 172, throttle bodied track slut
    #15
    Quote:
    Originally Posted by williamsvts View Post
    you could compound charge any engine. doubt you'd have teh room on a saxo though. ou'd need deep pockets aswell.
    sybez then....
  16. Infrequent Poster Joined: Dec 2006 birmingham Posts: 178 saxo vts
    #16
    do the flange bolts from a t28 fit the manifold or do i need a after market manifold to suit. i have a t28r turbo from a pulsar that i had on my rover coupe turbo,same as the 200sx.
  17. Saxperience Forum Bum Joined: May 2007 Posts: 4857
    #17
    Quote:
    Originally Posted by VTS_Pjsaunders06 View Post
    right correct me if i am wrong but cant you supercharge and turbo a saxo at the same time, like a jagaur. I am sure i have heard of it somewhere on other cars as turbo and superchargers work differently
    Yes you can and it can work very well. I have often thought about doing it to a saxo. Most positive displacement super chargers when fitted to the saxo you use a drive extension and the super charger sits just in front of the battery. Then the turbo charger will just sit in front of the engine. Rather than compound charging you would be better just fitting a air bypass valve on the super charger and then have the turbo charger feeding in to the super charger. The super charger will be quite happy to pull air past a stalled turbine and then when the turbine spins up the positive displacement will be simply bypassed.
  18. Frequent Poster Joined: Dec 2007 Gt Yarmouth Posts: 717 56 Plate Fiesta Zetec-S TDCI 52 Plate Icelandic G
    #18
    For a garage to carry out a turbo install and all associated work, how much am i looking at for my VTS?
  19. Saxperience Addict Joined: Sep 2006 Bridgend, South Wales Posts: 11234 iTB 205 Rallye, 205 STDT.
    #19
    Quote:
    Originally Posted by VTR_Dan_VTS View Post
    For a garage to carry out a turbo install and all associated work, how much am i looking at for my VTS?
    Around £6000
  20. Frequent Poster Joined: May 2006 Posts: 691 Mk 1 VTS poseidon blue
    #20
    Quote:
    Originally Posted by AXracing View Post
    Yes you can and it can work very well. I have often thought about doing it to a saxo. Most positive displacement super chargers when fitted to the saxo you use a drive extension and the super charger sits just in front of the battery. Then the turbo charger will just sit in front of the engine. Rather than compound charging you would be better just fitting a air bypass valve on the super charger and then have the turbo charger feeding in to the super charger. The super charger will be quite happy to pull air past a stalled turbine and then when the turbine spins up the positive displacement will be simply bypassed.
    How would you govern the supercharger? Would you just blow off the excess boost?

    I was thinking it would be easier to drive a supercharger through a CVT or slip it on a small clutch so that maximum boost could be achieved from idle all the way to redline with no turbo lag… but maybe the parasitic losses wouldn’t warrant any gains…probably why Volkswagen decided to use the turbo at high revs
  21. Regular Poster Joined: Jul 2004 Grimsby United Kingdom (England) Posts: 405 rs-1800, white vts mk1, green saxo vts mk2
    #21
    Quote:
    Originally Posted by Jackman View Post
    Around £6000
    plus the cost of an uprated gearbox and clutch to cope with the extra power!! cuz the standard box will be as much use as a blowup dartboard
  22. Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi
    #22
    Quote:
    Originally Posted by simongvts View Post
    do the flange bolts from a t28 fit the manifold or do i need a after market manifold to suit. i have a t28r turbo from a pulsar that i had on my rover coupe turbo,same as the 200sx.
    depends what manifold you buy lol
    you could buy a manifold with that flange and weld a new head flange onto it. thats what a lotdo with the vauxhall engines.