Thread: Jbs Twin Scroll Turbo R32 Conversion!

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aint they like the vain turbos used on many vag diesels and porche turbos?

the expand as they spin giving very quick spool with little to no lag and good boost at any rpm?

found this on the net

A "twin scroll" or "divided inlet" means that there are two separate volutes within the turbine housing. The main reason for doing this is to isolate the pulses coming from each exhaust port and maintain more of the pulse energy from each cylinder all the way down to the turbine wheel. There are no differences between the turbine wheels used in open or single inlet turbines compared to those used in twin or divided inlet turbines.
Generally speaking, a divided inlet turbine setup will respond faster and produce boost quicker than single or open design of the same nozzle area, of course this is dependent upon proper execution.
While it does not cause any problems or harm to run a divided inlet turbine housing on a manifold that is an "open" design, none of the benefits of the twin inlet will be seen.

Originally Posted by zirconium

found this on the net

A "twin scroll" or "divided inlet" means that there are two separate volutes within the turbine housing. The main reason for doing this is to isolate the pulses coming from each exhaust port and maintain more of the pulse energy from each cylinder all the way down to the turbine wheel. There are no differences between the turbine wheels used in open or single inlet turbines compared to those used in twin or divided inlet turbines.
Generally speaking, a divided inlet turbine setup will respond faster and produce boost quicker than single or open design of the same nozzle area, of course this is dependent upon proper execution.
While it does not cause any problems or harm to run a divided inlet turbine housing on a manifold that is an "open" design, none of the benefits of the twin inlet will be seen.

That is Correct

Originally Posted by BlackpoolR32

It's a 2-in 1-out system IIRC, two intake ports and one exhaust?

Sounds good guys, a UK manufacturer & supplier of an off the shelf turbo system would be a real benefit to the UK VAG 24valve V6 owners

Is the choice of twin scroll system to retain the standard 'path' of the manifolds, or like you say, will these be a complete fabrication from head to turbo/downpipe using your existing/planned EL manifolds?

Also, are you planning to use the standard pistons with a compression reducing head plate or a new internal setup of lower compression items?

Look forward to seeing the progress and the finished article, and the big question I can't believe's not been asked yet...

At this point, any speculation on power/torque outputs? (We wont hold you to it)

Good Luck Lads

In a bit,
Leon.

Edit. Lol, beat me to it!

Hi Leon, on the twin scroll there is only one inlet and one exhaust.

Because we do a lot 'off the shelf' turbo kits for the 1.8 20VT we will be looking to have this as an 'off the shelf' too

The manifold is going to be equal length custom built like our 1.820VT manifolds -




On this R32 we are replacing the pistons and rods; maybe for lower power models a spacer gasket could be used.

As for the power - The turbo is capable of 650bhp but we are looking to run it at 500-550bhp as for torque I am not 100%.

Originally Posted by davefish

And... Are you planning this for the MKV in the future?

At this moment nothing is confirmed.

Mike

Originally Posted by Mattchaps

500-550bhp... not much then

What are your estimated prices for this install?

As we are quite early on with the conversion I cannot really say as soon as we get further I will have a better idea.

Originally Posted by FiftyPenceR32

You will have to consider drivetrain upgrades (clutch, VW etc) when running anywhere around 500bhp+ on an R32 this is will documented on VW Vortex following extensive research by both R32 owners and Jason of Streetwerke not to mention HPA Motorsport.

Just an FYI if youre not already aware.

Already taken that in mind we have a clutch kit here ready that will be able to take 600lb/ft

id be interested on seeing the actual outputs for this

I cannot remember the brand of clutch off hand as I am now at home but it has been specced specifically for this application. As soon as it's done the dyno graphs will be up for all to see with a final spec list and the all important cost!

when do you think it will be up and running?

Originally Posted by FiftyPenceR32

What brand of clutch do you have there for this application?

We like to use the Spec clutch kits as they offer very good torque rating and extremely good driveability.

Originally Posted by Wayne

i have no doubt at all that the jbs guys can do this and to a very high level. I have followed alot of their work for the 1.8t engine and the equipment looks extremely professional.

Thank you for the kind words we do try our best!

Originally Posted by r32mjc

when do you think it will be up and running?

Looking to have the kit built, fitted and tested in 2 months.

Mike