Got my Coup today, brand new GT2860RS, FMIC, SIP, custom exhaust manifold made for me from reputable welder here in BG, 3" from 5 stud to the rear bumper.
Car was run on Gtec 1 until now(will get in touch with Flea soon).Have Gtec2 as well, but not used yet - have only 5-6 hours with my car since i got it back....
But i have terrible spool, with original turbo i get 1 bar at 3k, now 0.2 when 3200 - 3300......have no time or place to rev higher cause i'm driving in town now, but untill 4k i can't feel that punch forward as with original turbo. As i said, didnt drive it above 4k and have no idea whats situation after that rpm's. Read that with this turbo here people can reach 1 bar at 3k rpm......Manual boost controler was set at 1.2, and did not touched. Standart 20VT injectors, 440cc wait to be mounted.
Is there any correct setup of wastegate arm that i must do?
Any ideas will be considered and tested.
PS - something happen with idle, car occasionally rev to 1500 - 2000rpm, and idle was rock solid by far - never did that before.

It will spool later than a std turbo, but you don't want to drive it hard un-mapped, you should get it on a rollin road to check the fueling of the g-tec 2 and get a print out showing the spool up.
A flea map will help the torque/spool up and i'm sure he will want to see the graph of the g-tec 2 prior to a custom chip.

I'm using Innovate wideband sensor and controller, and tomorrow will observe what afr it reads in high revs - 3-4-5k for short periods.

above all else do not drive the car on boost if you don't have to, unmapped without a trace after fitting big mods ..i cracked a ringland that way..as said above you will lose upto 1000rpm spool up with the rs..having it mapped by lieghton will help get the best spool possible but headwork etc by barbz would help a lot in this area also things like intercooler pipework diameter ,routing etc can all affect it dramatically there is so much to it that there is no real easy answer except if you have a friend with a lot of experience ask for help if you feel it's not right and can't suss it out (sorry not much help) ..good luck

I have a GT28 RSR, so smaller exhaust wheel than you, i am getting about 0.9bar @ 3000 revs on the rolling road so maybe a 1 bar on the road, I want to improve on this in the future.

like ktm says there could be lots of areas to look at, as well as the above the down pipe could be leaking if its not been re-fitted correctly etc.

what size housing do you have 64 or 86?

This is "my shit" http://www.torquestats.com/modified/index.php?car_id=184, and I run gt2860rs from 2006.No matter what chip/map I was runing at different moments in this time,always my car reach full boost at about 3400-3800rpm and at 2500rpm ~0.8.
Ferrarist, you are close to romania,so if you want, you could come to see my car:).Until next month (I'll upgrade to gt3582r)
PS: before to upgrade the turbo,timing belt was changed ? Maybe there is problem(this happened to me in the past)...or the actuator,or the vacuum hoses and controller.
Cheers,

64
Well when back home tomorrow i'll fit the gtec2 chip,walbro and 4bar FPR waits in my garage, and will try to check if everything's OK, that there is no air leaks, and so on. Just did a quick spin hour before, and afr leans when boost starts to rise - 13,8 - 14,9 - as you said i can't risk push further.....
Will report any future results, thanks for help....maybe i little overreact, and still have to get used that RS spools later than original.....

have you checked the actuator on the wastegate?is it disconnected?i had an actuator arm break on me once and it would give just over 0 on the boost gauge,if not,check the spring strength in the actuator,could be a very weak spring.

It was brand new GT28RS, but it's worth checking this, will be back home this afternoon and will dig under coup's bonnet......being in other town, with absolutely no tools for do whatever i want, can not afford to work or check anything....
Pictures if the manifold, cooler form, and downpipe will be added as well......

Boost improved now, wastegate arm has about 1.5mm play, fixed......

thought it sounded like an arm fault,go and enjoy

Arm was very stiff, just has play.
Will post pictures later to see my config, i want to gather some opinions.
Thanks.

Pic's

Your intercooler may not be doing your turbo spool any favours (dual pass). Try bypassing i.e. turbo straight to the throttle body and see if things improve, of course be careful not to drive too hard, this is just to test the turbo spool time.

Yes, will be next in my check list, thought that there is no need to run any bigger ID pipe from compressor to cooler inlet, pipe is only 2mm wider than turbo exit, and think that this didnt slow the flow.....if any wrong, maybe it's the route exiting cooler to throtlle body.

Flea was saying that dual pass intercoolers are not as good as single pass and they will restrict spool up.
you will probably find if you if you switch to a single pass design you will also have to turn your boost controller duty down, as you will make the same boost pressure at the manifold with less duty.

Yep, maybe i will redesign it to single pass, and few "ribs" will be removed as well.....

flea was also saying drive it gently with the intercooler bypassed to see how much its restricting spool up.
The diameter of your pipes looks fine, just try and find as short a route as possible.

Last night run, when wastegate arm fixed shows good boost improvement, 1.5bar hit in 4200rpm, didnt push any further no matter that afr's looks fine at about 10.8 - 11.8 - maybe little richer but i have time to fit 4b FPR and Gtec2, anyway i'm in contact with Flea for remap....
And Jonone - note for gentle driving taken, i'm very caution with this.

It's a decent turbo but I also was a bit disappointed when i fitted mine. 5 years ago there was a lot of hype on the internet on how fast it spools but i guess it was just good marketing. There are a lot of better (faster spooling/better top end/more reliable) turbos out there than Garrett produces.