Stage 2 sc build has begun

tiller

Are you after the 92mm pulley?

kentmo280z

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 .

tiller

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.

Jinxx

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.

kentmo280z

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...

tiller

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.