Re: for those who have or have had the z charger.... (K-FIZZEES SLCZ)
'94 Corrado here. Z-Eng fall 2000. 60,000 km (40K miles) so far. Only problem is the serpentine belt skipped once, losing one of the ribs, making a racket. Still running 5K later without any problems.
And now, I got a warranty replacement, and paid for the cogged belt upgrade. If I get another 60,000 km out of this one, that'd be 120K km (~73K miles). Even if it died for good then and Z-Eng didn't give me a free replacement, I'd consider that a reasonable investment.
Power is nice, but it sounds like the new GIAC chip is worth it - I don't have it yet, but will probably get it soon..
Before everyone jumps in with "But Eurotech is better", here is why I bought Z-eng.
-Summer of 2000, it was the ONLY game in town for Corrados
-Didn't know if car would pass emissions here in Ontario WITH S/C (emissions were just introduced here, my FIRST test was 2001 - car passed, btw)
-liked the fact I could install it myself
-had heard good things from others
I don't regret my purchase.