Turboing the 2.0 16v

[ripplz]

how would you run it though?,would you need a aftermarket ecu and different loom?and i have a mk5 turbo
siting around recon that would bolt up?any imput would be great

[Wayne]

how would you run it though?,would you need a aftermarket ecu and different loom?and i have a mk5 turbo
siting around recon that would bolt up?any imput would be great

You need to strip the engine down and rebuild it with lower comp pistons etc then run standalone management.

Lots and lots of work. 

[Len]

Not the only way to lower compression ratio! Can increase the combustion chamber in the head.
And you actually want higher compression pistons.

[Wayne]

And you actually want higher compression pistons.

Not for a Turbo you need to drop the cr on forced induction.

[Khare]

Yup you need low compression stuff, forged internals if you don't want the engine destroying itself, you want a decent cam that will work with the turbo. Have a look here 

http://www.bahnbrenner.com/

http://www.bahnbrenner.com/vw_audi/categories/251/VW_Turbo_Kits

[Ess_Three]

Not the only way to lower compression ratio! Can increase the combustion chamber in the head.
And you actually want higher compression pistons.

On the VW 16v head, messing with the combustion chamber shape will yeild a poor burn pattern....so that's not the way to go.
There is a mix and match set of standard internals that cab be used to give a low compression bottom end, or you can use a spacer plate and 2 head gaskets, or even just two of the ABF head gaskets for mild boost.

Either way...it's lower on compression you want to go, as has already been said.

[Ess_Three]

Yup you need low compression stuff, forged internals if you don't want the engine destroying itself, you want a decent cam that will work with the turbo. Have a look here 

http://www.bahnbrenner.com/

http://www.bahnbrenner.com/vw_audi/categories/251/VW_Turbo_Kits

ABF cams are fine.
They are short duration but high-ish lift anyway.

Aftermarket cams need to be higher lift, and possible less duration, to work well, or you'll blow the compressed charge straight through.

[Stirring Moose]

It's not necessarily less duration you're after as such but you do need to limit valve overlap quite severely. It's overlap that'll have your nice compressed charge scooting right on out the exhaust. Obviously, minimal overlap does impact on the cam duration you can achieve though.

S.M.

Yup you need low compression stuff, forged internals if you don't want the engine destroying itself, you want a decent cam that will work with the turbo. Have a look here 

http://www.bahnbrenner.com/

http://www.bahnbrenner.com/vw_audi/categories/251/VW_Turbo_Kits

ABF cams are fine.
They are short duration but high-ish lift anyway.

Aftermarket cams need to be higher lift, and possible less duration, to work well, or you'll blow the compressed charge straight through.

It's not necessarily less duration you're after as such but you do need to limit valve overlap quite severely. It's overlap that'll have your nice compressed charge scooting right on out the exhaust. Obviously, minimal overlap does impact on the cam duration you can achieve though.

S.M.