more-bhp wrote:So thats why I want a BIG turbo delivering low boost...its the way to go IMO... and thats what I'm looking at sorting....
I second that notion!
My mate's old Corrado is a good example of what turbo sizing can achieve on the 1.8T. He used a big port AGU head on a 225 block + GT28RS. He kept it simple, so DTA management was used along with a cable throttle. It was a basic open loop map with manual boost controller and made 350hp - 340lb ft @ 1 bar.
1 bar from a K04 makes, what, 210-220hp, so quite a difference in flow!
The downside though as you've said, is lag. But for me personally, I don't find uber boost below 3500rpm to be particularly useful in a FWD car. It's better to get some momentum in the car before the boost comes on song, which reduces tyre slip and also gives the gearbox and easier life.
The pay off for the slower spool up is of course a much beefier mid to top end.
My mate's pulled harder in 4th and 5th from 3500 to 7K than the stock engine does in 1st and 2nd from 2000rpm. And the best bit was peak torque held all the way to 7K, so it had a massive midrange power band.
Just have to watch the gearbox with that kind of grunt though!
Seems they are only really suited to AGU engines! Anyway, has anyone fitted the H valve? Wondered if this would be less aggresive than than the J valve?? 
Emailed a company called Star Performance today about a live custom map www.starperformance.co.uk i have never read a bad review on any sites like SCN and briskoda etc. Had a shot in a guys Ibiza Cupra with there map on it and it went like fook!! Very aggresive 
