GTM said directly they're going to charge 8 hours. Remember though, they know the kit from the inside out, so it could be more like 10+ hours for a master tech looking at the supercharger for the first time.

:roflpuke2:

It's only +100whp if you assume the stage 1 is limited to 400whp, which it isn't.

On this kit most people have been seeing 390 - 420whp, so it's still at least 80whp depending on the Dyno you're using.

Either way, a solid 50-80whp for around $1,500 is a pretty good deal for those with the stage 1 SC from GTM.

More like $2500 with install labor, no?

I don't normally calculate labor on the forum because it depends, shop rate, DIY, other mods added at that time throw the labor number out of whack.

That's a good point. Just didn't want anyone to think it was $1300 out the door for the upgrade.

Yeah, guess we could say 50-80whp for $1,500+labor. :tup:

Absolutely

It is exciting as hell that GTM keeps giving us new options, especially on the older kits. I would absolutely expect them to develop stage 2, 3, 4, - 100... but giving those of us new options with what we already have is genius. Just goes to show that they aren't in it for the coin alone, they really are enthusiasts and want to share this with the rest of us. I am syked to do the stage 1.5.

I love the SC... another 80-100 hp should bump the scream to a new level.

^ Did you order it?

Not yet... waiting on a shop to give me a quote... when is your's due to come?

As soon as I can talk the wife into it. lol

Good luck! Or... be sneaky, maybe she won't notice?

Hey Mike and Sam, since you guys are pioneering SC kits for us... i was wondering if you guys have thought off adding some kind of CVT on the rotrex unit to control/maximize boost...

it is exciting! but dont forget about the profit area. if your a customer willing to spend 8 grand then a year or two down the road you will likely spend another 2 grand to improve the 8 you already spent.

yea for money pits!!!! :D

Back when I first learned of CVT's, a supercharger was my first thought for an off the wall, awesome application. ;)

Unfortunately, CVT's are expensive. They're also not super lightweight either. Controlling one is also complicated. Complication adds more cost (as well as more things to go wrong).

Therefore, adding a CVT system to a supercharger is going to be heavy, expensive, complex and while it will give you a broader powerband, the cost/benefit ratio doesn't pencil out.

All that said, however, Rotrex is working with another company to develop a compact solution to do exactly what you and I both want. The key difference between what they're doing and simply adding CVT, is that the variable drive ratio will be integrated into the supercharger unit itself. By fully integrating that inside the casing, it will be light, efficient, compact, and more cost-effective. Don't hold your breath though, the R&D on that has been going on for two years now, and there hasn't been a word on any progress. It may end up that it the cost/benefit ratio isn't worth following through though.

There are already several companies that have done this with superchargers, but I believe they are for more industrial applications. I have thought about this quite a bit and like you mention, a major issue is efficiency in packaging.

i've heard of rotrex doing a joint venture with torotrak to figure this piece out before... actually the youtube videos of the concept they are working on, makes me wonder if you have more information on their progress... because it looks like to me that the design for the GTM stage 1.5/2 SC kit is perfect for upgrading the sc to whatever rotrex SC unit with the built in variable drive they come up with... in any case... pretty exciting stuff...

Variable drive supercharger Rotrak (Part 2) - YouTube