| unfortunately it is very expensive. Which VVTs have you been looking at? My cousin and I, along with my engineer friend, have been looking into this for a couple years now. The technology is there and proven, however not many companies are producing a large enough range of universal, mechanically controlled VVTs for gasoline engines. We have looked into producing a twin VVT kit for the VG, specifically for our own cars, and it is definitely possible. I personally haven't pulled the trigger on producing a kit for my Z because of the huge financial investment involved. Can't expect to get it right the first time. It will take lots of research and development and I wouldn't want to undergo the investment unless we could produce a marketable kit for all Z owners. The question is, how many people will be willing to fork out 5-6k for a VVT kit if we develop one? (especially over what you could buy right now for that kind of money). There are definite advantages and disadvantages. Also, people have different goals regarding their cars HP and performance, so we'd have to develop different kits for different applications, perhaps two or three different stages. Right now, the best VTG set-up available for gasoline engines seems to be the Borg-Warner (electronically controlled) set-up that is used on the Porsche 911. Gotta love 500rwtq at about 2000rpms! This is a kit that was perfected for this application (something I would love to create for the Z). One for the VG would require lots of R and D and lots of $$$. Borg-Warner will build you anything you want, just call them and ask how much it will cost lol. I am currently running a gt3071 set-up and I love it for the street. My goal for developing a VVT kit is to have the same top-end HP potential (on pump gas) as my current set-up, but obviously with quicker spool. With stand alone units, such as Aerochargers, this may not be possible with the 1.5 lt displacement for each side of the VG. I think at best, these would be good for low to medium HP levels with fast spool (a good upgrade over stock turbos to 530 turbos). And they really may not outspool the ball bearing turbos by very much at all. We won't know until we put a kit on one of our cars... stay tuned ;)
 |
