Tiller have you upgraded to the 85mm yet

So if I want to stay around 10 psi, do I use the 88mm pulley from Gamma?

Are they OEM GTR Spark plugs or aftermarket?

I was given this part number for OEM Spark plugs for GTR:

NI-22401-JF01D

NVM:
Found it on Z1

Yes I hav the 85mm and it will be going on this upcoming summer along with other mods, waiting on Charles from DJ for fuel system,plus I will be running 110 race fuel

Yes I believe the 88mm is 10lbs approx

Yes the dilka8a8's are correct ones replacement,that's what aim currently using

Well, Instead of waiting on Gamma to get around to doing something, I ordered a 90mm 7 rib pulley from Kraftwerks ( There's a story with that sale also...) and I took the incorrect MAF pipe , reshaped and had it welded to fit my application. I also ended up painting the pipes with black wrinkle paint.
I have an 84mm pulley from the Stage 1 kit but am not looking to over stress my internals .

Ok sounds like things are moving along for you.
I purchased my 85mm from kraftwerks also,great prices.
Jinxx has been running the 85mm with no issues , good fuel setup and tune and these motors can handle 12lbs all day long, I think 84mm pulley might over spin the rotrex unit.

I haven't had any issues with my 85mm pulley which is 12lbs .. I did upgrade the fuel to the return system. My car is also a daily driver about 18k miles and supercharger has been installed since 1500 miles. The 85mm does over spin the supercharger a little at 7.5k rpm and is almost a perfect match at 7k rpm ... I rather max out at 7k and not redline the car ... some chose to run to redline to max out the supercharger. The perfect match would be the 88mm ... that should max the supercharger out about 7.5k Rpms ... IMO.. anything over 88mm is wasting supercharger potential.

So I did my first drive after installing the Stage 1.5 upgrade...
Originally my BOV plumbed back with the stage 1 kit. Relatively quiet but fluttered under medium acceleration.
Now, it vents to the atmosphere and is loud as hell, almost sounds like my wheezing grandma... for lack of a better description.. lol
I have a turbosmart plumb back and also a synapse diverter valve.
What are you guys running with what spring and how tightened down do you have the spring.
Is it loud also when it blows off?
I'm looking to quiet it down a bit...

Kentmo, the turbosmart bpv gets loud when off throttle. There's no real way to quiet it down. It turns heads and can scare the crap out of people! The spring tightness does not really matter, at least did not feel any real difference. I try to keep at medium tightness most of the time. The biggest issue with turbosmart bpv I've had is that the piston inside gets dirty, dry and eventually gets stuck or leaking boost when full throttle. Even once a month cleaning and lubing did not help. So after my last track day and very leaky bpv I decided to try something different. It took me 6 months of waiting to finally receive the synapse diverter valve. I haven't gotten a chance to install it yet. Also haven't been driving the car due to winter so I am not in real rush plus need to cut off and weld on new flange for the synapse diverter valve.

I also have the Synapse diverter valve and that one wheezes..lol
I might get creative, fabricate a pipe and plumb the valve back into the intake.
There is definitely room to run some 1.25" or 1.5" silicone /aluminum pipe from the valve to the intake. Weld on a 1.25"/1.5" flange to the intake.
That would quiet things down considerably.
Someone tell me why this should not be done.

Yes my bov is very loud and scares the crap outta people but I love it
I found when my bov got dirty the sound changes to fluttering so I removed it and clean it, then its back to normal again.
For my spring tension i usually tighten it just a turn or so past the rubber o-ring,not sure if it's right but it's been working fine for me, also the spring is the one that comes with the kit,I haven't replaced it.

Trying to make sure I understand, does it sort of sound like a rattlesnake?

I use the turbosmart valve that came with the kit ... and tighten just a turn past the rubber o-ring ...very little if any flutter and then it's at a very low rpm if it does. I did have issues with it sticking for the first 10k miles but each time it did I took it apart for cleaning and re polished the brass piston now it seems to never stick anymore .... knock on wood ..as far as loudness ..... it is very loud and very noticeable .... if got want to make it quieter you could attach a hose from the bpvand route it further down the car ... but for me I love the sounds and loudness of it ...can't really hide the whine of the supercharge so with out the bpv sound it would just sound weird to me