vts turbo plans

[simongvts]

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???:y:

[Berg]

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

[gazza808]

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.

[CampDavid]

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

[Karl]

...surely when you turbo a VTS you uprate the camshafts at the same time anyways.

[Scott]

not usually, no real need to

[Ryan]

...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

[AXracing]

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.

[williamsvts]

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.

[CampDavid]

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.

[pjsaunders06]

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

[Quick]

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!

[williamsvts]

you could compound charge any engine. doubt you'd have teh room on a saxo though. ou'd need deep pockets aswell.

[Joesnow]

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!:P

[Ryan]

you could compound charge any engine. doubt you'd have teh room on a saxo though. ou'd need deep pockets aswell.

sybez then....

[simongvts]

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.

[AXracing]

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.

[VTR_Dan_VTS]

For a garage to carry out a turbo install and all associated work, how much am i looking at for my VTS?

[Jackman]

For a garage to carry out a turbo install and all associated work, how much am i looking at for my VTS?

Around £6000

[Joesnow]

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 :S

[westy2k1]

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 ;)

[williamsvts]

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.