I would run this bracket no matter what, doesn't matter the power.

Go out to your car, Grab your Supercharger belt and twist it.

Watch the whole blower flex towards the back of the car, very flimsy.

If you can do this with your fingers, imagine how much it flexes under heavy load.

Yes the brace prevents the bracket from being flexed towards the front of the car, which causes the belt to slip limiting the boost.

In regards to the v1 upgrade. I still need to put one in mine to ensure it drops in without modification. I'm about 95% sure it is just a swap. However, you will need to add an oil pan spacer with a tap and run a return to it from the sc and also one to feed the sc from a y off the pressure sensor fitting. Not really hard to do and a shop could do it in a couple hours.

V1 flows up to 26psi vs our 22psi because they can be spun faster.

Another benefit of going v1 are the HD bearings. These are designed to handle high loads that cog belts make. Between the cogs and brace you would never get slip.

Now you can upgrade the v3 bearings but I do not have data on this and the bearings aren't cheap ($750 plus install) I can sell my v3 si unit for around $1250 as that's what they have sold for. I can get brand new v1 si units for $2100. So I'd rather do that than upgrade bearings.

Okay fair call, reason I ask, in Australia here to send the blower away even to have the Impeller upgraded is around $1000~ so will have to weigh up options :)

I tried to drop off that flex bar at a different shop this morning and he didn't even want to quote it. So right now we have 4 guys that want one. I think I am going to have to wait until the air to air kit is ready for sale and when guys are making a lot more power then they will want it.

Just spoke with the shop. Pipes will be shipped this week. Ill throw them on then go dyno.

Can't wait to hear the results !

That was on the 928 bearings but Topgunz spoke to Vortech the other day and they said 928 is wrong, the oiling design doesn't allow it to spin more than 53,000. That's why Vortech doesn't offer it with better bearings. If you just change the supercharger pulley to a 3" and nothing else you are at 51,750 at 7,500 rpm.

Correct. The 928 bearings are only good for upgrading the v1 or v2 units. But Vortech now offers more setups then listed on their website that have the heavy duty bearings so it really doesn't make sense to pay for upgraded bearings.

I did this and found no flex at all. Perhaps my bracket is different?

what kind of psi are you looking at changing it to 3" and the impeller upgrade?

With the 928 impeller mine was at 9 but it probably would be 11 without the long tube headers.

Another benefit of upgrading to this A2A kit, besides the huge safety gain, is that basically the kit becomes "upgradeable" to make some extreme power. As discussed, I am looking into this whole V2 upgrade and have found the perfect unit to do this with. The V2 units are capable of a ton of power since they can utilize the HD bearings and be spun like crazy.

For instance, here we have a guy, who I know and have spoken with on the phone a few times, who has a 2003 350Z. This platform has the VQ35DE motor. Yes, when the rods were toothpicks before upgrading to the HR rods. He has been pounding the heck out of his stock block since 2004!!!... with this V2 SC trim unit. He is now making 577whp/446wtq. and has ran in the 10's! Check it out.....

"TimRod's 350Z" | Vortech Superchargers

Now if he is doing this on the 3.5L DE, this can easily be done and hit over 600whp on our beloved 3.7L VHR. Especially because Vortech has came a long way since he bought his unit in 2004. They now have a much more efficient, stronger and more powerful unit in the same package.

More to come on this.....

What's the possibility of this fitting on a G37 coupe? Would some things need to be fabricated?

This should fit right up. It obviously hasn't been done yet but even if there is a small diference it can easily be worked around.

Not an apples to apples comparison, but the BP kit for a Z fit the G with very minor tweaks. This should be fairly similar.