A new Blower... or same old, same old

[oldeskewltoy]

As some of you know I've been looking to boost the bottom end SOME My ride is an AE86... I'm utterly paranoid about #$%ing up the balance so I won't consider an SC12... I was giving some serious thought to the Rotrex S/C, it is a centrifugal unit, and although planetary gear driven, it still needs 3k+ rpm to get decent torque #s.

Is the TVS R660 S/C by Eaton a compact enough unit??? Small enough that doing some MINOR mass adjustment - like batt to back and a non US front end will offset the added mass of the S/C?????



http://www.eaton.com/EatonCom/Produc.../TVS/index.htm - model and displacement info listed in chart on bottom of page

Eaton’s new Twin Vortices Series (TVS) is a roots-type supercharger for a variety of engine applications that delivers more power and better fuel economy in a smaller package, for uncompromising, high-performance driving.

The TVS supercharger’s patented design features four-lobe rotors and high-flow inlet and outlet ports that greatly enhance thermal efficiency, deliver higher volumetric capacity, and enable higher operating speeds. The TVS supercharger is capable of running with a high thermal efficiency (up to 76 percent) across a very wide operating range.

The improvements incorporated into the TVS design allow for the use of a smaller supercharger, reducing the package size and weight of the system. The sizes range from 350cc to 2300cc per revolution, and cover engines from 0.6 liter up to large displacement V-engines. All TVS superchargers have a 2.4 pressure ratio capability and a thermal efficiency that exceeds 70 percent, which enables more compact packaging and greater output.

The twin four-lobe rotors feature 160-degree twists. The higher helix angle of the rotors coupled with a redesigned inlet and outlet ports, improves the TVS’s air-handling characteristics without increasing the overall size of the unit. The TVS improved noise and vibration characteristics eliminate additional noise-reduction treatments, complexity and system cost.

The TVS sets a new standard of boosting device performance and reaffirms Eaton’s leadership in the performance automotive market

[oldcorollas]

TVS is effectively twinscrew.. just not as much screw.. and in some ways may be better.

got a price on thos epuppies? $3K? 4K?

[oldeskewltoy]

TVS is effectively twinscrew.. just not as much screw.. and in some ways may be better.

got a price on those puppies? $3K? 4K?

Not yet.... there ISN'T a lot of info out there yet, at least not much I've found

[Benno]

eaton tvs is the blower used on the trd aurions, similar size and design as the older 'M' series superchargers, but it runs 4 lobe rotors with a tighter twist than last model.
increased efficiency largely due to the huge outlet port in the base(made possable from the twist), and way lower inlet temps compared to the old girls(pound for pound)

[Mr Revhead]

sorry, why not an sc12?

[5000gt]

internal compression FTW....

[JustCallMeOrlando]

I thought they were still blowers as opposed to compressors?

[Hen]

Seconded Mr Revhead. How will an SC12 screw up your balance?

If it's a weight issue, consider that any twinscrew type supercharger needs a big, fat, super-flat mount to bolt to to ensure the casing doesn't get pulled out of shape. So I feel SC12 + piping and mounts would weight the same as a twinscrew with piping and mounts. Plus the full SC12 setup would cost about 15% of the twinscrew setup.

Twinscrews are great, but I don't think weight is one of their advantages.

Hen

[Earlyrolla]

The TVS is still classed as a positive displacement (roots type) supercharger.

Harrop would probably be able to find you out a price as they are the Australian dealer for Eaton.

The TVS superchargers are smaller in physical size compared to the previous generation Eaton superchargers. The dimensions are on the Eaton website.

The TVS supercharger is VERY impressive! The efficiencies figures are not too far off a Lysholm supercharger.

Not that it is too much help to your situation. If you have the $'s then go buy a TVS or a Lysholm supercharger. They will give better low end performance then a centrifugal type supercharger.

Why not use the SC14 as an upgrade?

[oldcorollas]

SC12 and 14 are limited in boost due to their heat characteristics..
TVS are smaller due to higher rpm capability no?

the TVS doesn7t have internal compression no, but it has the gradual push that the lysholm does, and, in my personal opinion, has a much more favourable design... ie, same shape opposing rotors, same speed opposing rotors, smaller volume per "pocket"..

all they need to do to have internal compression is make the case and rotors longer, and that might happen later if there are no outstanding patents in having "internal compression"

if they had longer rotors and thus internal compression, i think they would be more efficient that the lysholm...

[oldeskewltoy]

My ideal when it comes to mass is using a small Rotrex. From a mass and fitment POV nothing beats the Rotrex! You can use modified alternator brakets to mount up a Rotrex.

I know the limitations to the SC12 and SC14, the TVS easily would outperform them. I'm hoping to somehow have a small enough unit that the total mass added would be under 30-35 kilos (approx mass of batt and US bumper)


.

[love ke70]

im sorry, but if your not seeing boost til around 3k, why not go turbo? which will be lighter and open to more playing.

[Mr Revhead]

My ideal when it comes to mass is using a small Rotrex. From a mass and fitment POV nothing beats the Rotrex! You can use modified alternator brakets to mount up a Rotrex.

I know the limitations to the SC12 and SC14, the TVS easily would outperform them. I'm hoping to somehow have a small enough unit that the total mass added would be under 30-35 kilos (approx mass of batt and US bumper)


.

ok, i was just thinking that the sc12 is cheap and easy. any other s/c is damn exspensive and seeing as i got the impression that the internals were remaining stock id say the sc12 would do the job just fine.
my AW11 had stock big port running an sc12, went very well!

[oldcorollas]

if you get a rotrex, just to save a bit of weight, then you deserve the shit drivability you will get

if you are that worried abotu the "balance", i wonder if you are changing your own weight etc to fit to the car?

how are you adjusting the balance of the car as fuel gets used? thats a good 40-50kg right there....

[love ke70]

i thought he was talking feng-shui