And I don't think it needs one. I was running 12lbs of boost with no pinging!

jackson racing sells a kit for use with their honda/miata applictaions and several comptech supercharger users use aquamist with their acura NSX kits(this car is especially prone to detonation-pinging/high compression and 9000 rpms doesn't last too long)I run this system on the S4 and it works incredible!

but basically when the fuel ignites in the cylinder before it should

i know little about SC's but I saw a few advertisements for aftercoolers for SC 5.0 Mustangs. It was about $1500, it gave substantial hp gains and let the car boost a fwe psi higher. I just don't know how it works...

since it is downstream from the throttle plate, it doesn't need one. The original PES system required one because the SC was upstream from the throttle plate.

Charge cooling is basically out of the question as the SC exit is mounted directly to the intake manifold.

The G2 is a very nice setup - I just don't like how they jury-rigged the power steering pumps inteface to the belt. They need to find a better solution.

There is nothing wrong with the current solution.

I did get mine to squeek over the PS pumps at an autocross. But it's been fine since I installed a gator-belt, which PES supplied.

Mine seems to.

describe where the bypass valve is.

Also, the relocation of the power steering pump is such that only maybe 30 degrees of contact with the belt is being maintained. I could turn the pully by hand, slipping it on the belt. This is not a good condition and is what I was referring to.

click mod, and the SC. It will point you to a website that gives details over the SC<ul><li><a href="http://home.austin.rr.com/robsquattro">Rob's Audi Quattro Home</a></li></ul>

The valve is now integral in the SC. You have to look close, but, the actuator is visible on the passenger side-rear of the SC - and it attaches to the boosted side of the plenum for pressure sensing.

The belt really doesn't make great contact with the PS pulley. Fortunately, the PS pump doesn't need that much torque to turn it. I think the grippier belt they supplied is doing the trick. And even when I was getting it to slip at the auto-x, it did not slip enough to effect steering feel.

Rob Andrews set me straight regarding the bypass valve. The prototype G2 system I reviewed with Mike from PES did not have the latest "version 4" SC (with integral bypass valve), it used the "version 3" SC, which did not have an integral bypass valve. My bad.

Regarding the belt situation, I'm concerned that belt slipping may occur, even if you aren't hearing anything, or feeling a difference in steering feel. I'd keep an eye out on that belt, and carry a spare with you at all times. Enjoy the new found power!

Geza
99.5 Avant 2.8qMS
97 Boxster