chip,wastegate spring , turbo bar on on board computer

i have a audi 200 turbo 2.2 1b engine
i am considering a chip and wastegate spring . i am told i need to preload the spring on the wastegate ? what is it i do th change the pre load ??
also my on board computer goes up-to 1.6 bar is this normal ? tia snipped-for-privacy@hotmail.com
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Chip (Intended Acceloration is one good choice) and wastgate are the two best choices for performance mod. Probably get you over 250 hp if everything is working well.
1.6 sounds right b4 the changes - stock.
Preloading, not sure. Mine is NA so another place to check where they are very much in to the tech is:
http://forums.audiworld.com/v8 /
See you there.
Tony '91 100Q 5spd
nes wrote:

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