vf egineering tvs1900 for b6/b7 S4

[bangoman]

You’re in luck, the infamous NGNG car is for sale currently.
http://www.audizine.com/classifieds/showproduct.php?product=104365&title=supercharged-audi-s4-w-2f-oem-rs4-widebody&cat=68

Haha enjoyed your comments on there. I feel for the poor bugger (skifreakjay) who bought the car off ngng I wonder what he paid for it

And just like that, the ad is gone. Moral of the story is, don’t buy questionable performance products from any company that don’t have any proven results (quarter mile, pbox dyno etc.) or you’ll be regretting it like that poor fella skifreakjay. Forums like these saved me companies like PES and VF. AMD has not totally been shot down yet but when sak called him out, he acted like a little kid so yea I would probably not go that route either. We should be thankful for scrutiny these companies have to face from forum members.

I bet it will be sold to a non-forumite through craigslist/autotrader/cars.com. The poor schmuck who ends up with it will be disappointed with the car and will become a forumite. Rinse, repeat.

[RX-Heven]

But even with the parts in the domestic world being cheaper because of volume, there are still shit parts out there. You can buy $500 headers made out of tin foil that rust out in a year, or you can pay $1500 for a good set. Just because you can get parts cheap doesn’t mean they are good parts in the domestic world.

Of course there are tons of shit parts out there, but there is also many high-end parts and even more in the middle ground. Point is that because there is so much competition, even for a large market, prices in general come down. Of course if you want custom one-off stuff or specialty low-volume stuff, you will still pay top dollar, regardless of the platform you roll in.

[CountVohn]

But even with the parts in the domestic world being cheaper because of volume, there are still shit parts out there. You can buy $500 headers made out of tin foil that rust out in a year, or you can pay $1500 for a good set. Just because you can get parts cheap doesn’t mean they are good parts in the domestic world.

Of course there are tons of shit parts out there, but there is also many high-end parts and even more in the middle ground. Point is that because there is so much competition, even for a large market, prices in general come down. Of course if you want custom one-off stuff or specialty low-volume stuff, you will still pay top dollar, regardless of the platform you roll in.

I think one of the reasons so many people like JHM is, that they don’t price gouge. JHM prices don’t generally come down. They are constantly looking to make things more and more cost effective but, when you look at the prices for what you get, there isn’t 40% mark up because its an Audi.

[SquiddyB6S4]

Funny story about that.

NGNG and VF worked to try and make that kit the JHM killer (not kidding) they poored tons of money into the kit. The old VF M90 kit made 360whp with the M90 (one pass only would it do that next passes it made about 20whp less each time) The 1900kit made Drum roll please 378whp only 18whp more. Where the JHM Vortech unit made 440whp with no intercooler stage 1

The 1900 put out WAY WAY too much heat and takes too much to drive it. The one company using the 1900 on the RS4 makes less power then APR using the 1740.

On the RS4 the company that used the 1900 had to run 16lbs of boost to make 436whp. VF is using the same 1900 and only using 5.5lbs of boost on the S4.

I think the big thing that never gets talked about with the roots style blowers. TVS1900 or M90 is that they are one pass wonders. After the first pull or pass your generating soooo much heat that you loose 20whp or more each pass or pull on the dyno. Vs the C-fuge JHM or TTS type blowers where each pass the car gets more hp as the air charge is cooler. With the TVS or M roots style you need serious cooling. You know when APR used a smaller unit TVS1740 on the RS4 that the TVS1900 is a bust and too big and too hot for the 4.2

Check this out:

http://vf-engineering.com/wp-content/gallery/s4-v8/edit-dsc_0104.jpg

Not only is the intake manifold too small for a decent heat exchanger, but just LOOK at how TINY the water-to-air HX is! It’s microscopic! No wonder they can’t make any power, and it heats up and slows down every run. The TVS and other twin screw blowers are remarkably efficient, offering similar adiabatic efficiencies as centrifugals, since they operate without blade contact. However, if a supercharger kit for a Honda Civic comes with a bigger heat exchanger than the one for your V8 Audi, expect your V8 Audi to suck wind 'round every corner. Not to mention their tuner is probably not up to snuff, and they look to still be holding out on the factory Audi alternator belt to transfer 100+ horsepower, albeit with a couple extra tensioners for better belt wrap.

[sakimano]

Good observations. Do any of the roots type kits have big, effective cooling setups? This is one of the limitations of the design, where they’re constrained by the space available inside the new manifold, which is crammed in the valley of the V8.