Sc Vs Tc

[STAGE-A]

Anyone have any specs on the difference between Super charging and turbo charging the V35 (350 coupe)

also a price comparison on parts and labour

and does anyone know of anyone in Perth that could get these parts and carry out the work?

Cheers

lee

[nachoman]

with a supercharger, you actually lose power to make power and are less efficient that turbocharging which uses the exhaust gas

and correct me if im wrong but the v350 is a v6, so in theory it is best to have a turbo for each bank of the vee ( $$$ ), so a supercharger is probably better as you only need one as it runs of the crankshaft ( off the engine )

for superchargers id check out www.capa.com.au

or for turbos www.airpowersystems.com.au/

Edited November 15, 2006 by beerbaron

[STAGE-A]

cheers beerbaron...

[scathing]

Any FI kit that fits the 350Z will pretty much fit the V35 (not sure about the 3.0L engines). There are minor differences, but if you go turbo it generally replaces those bits anyway....namely the intake tube.

Most of the TT kits I've seen make 260-300rwkW. The big ones are Power Enterprise, APS and GReddy (although Jim Wolf Technology has released one recently). Of the three, the APS is the most complete and its the only one that's ADR approved. Its not cheap, though, and in Australia can only be fitted by an APS approved dealer.

I know of at least one APS TT on a 350Z in Perth. The owner had their car shipped to Melbourne for APS to install before shipping it back, but since APS no longer does retail work I'm not sure what options you'll have.

Supercharger-wise, the HKS Rotrex unit is quite solid. You're looking at around 225rwkW with a catback. Do a full exhaust on it, and you'll probably see a bit more.

Vortech also does a centrifugal supercharger kit for the 350Z, which CAPA sells in Australia. That's rated at 210rwkW, but its possible there's no intercooler in that setup (the "quality features" is a bit ambiguous).

There are other supercharger kits, but they're generally US companies and not well supported down here.

[scathing]

with a supercharger, you actually lose power to make power and are less efficient that turbocharging which uses the exhaust gas

and correct me if im wrong but the v350 is a v6, so in theory it is best to have a turbo for each bank of the vee ( $$$ ), so a supercharger is probably better as you only need one as it runs of the crankshaft ( off the engine )

for superchargers id check out www.capa.com.au

or for turbos www.airpowersystems.com.au/

Technically you lose power on both. Its just that a turbocharger has less loss than a supercharger.

There are single turbo kits available for the VQ35DE, but most are like the APS kit in delivering power in a big "hump". They also delete the factory's twin cats and run test pipes, which means if you get EPA'ed you'll get shafted.

Since most of the catbacks for the V35 are twins, which means you'll need a custom exhaust anyway. There's a guy in Sydney looking at doing a single turbo on his 350Z, and will add a 4" cat himself into a custom single pipe exhaust.

Supercharging will be far more cost effective. The kits are cheaper, its less invasive, and can practically be done with hand tools. And you won't need to upgrade the support systems the kit doesn't replace. The OEM clutch will not handle the 280rwkW a TT kit makes. The viscous LSD may also not have the strength required to provide the traction you need. Its also a pain trying to find room for an oil cooler.

While you don't make anywhere near the power with the supercharger (most of them run 3-4psi), there's still enough power to make you clearly faster than a NA car. There's not so much power that it overwhelms the chassis, which is a good thing. You can write off 1st and 2nd in the dry if you're hard on the throttle on OEM sized tyres with a TT kit, and 3rd in the wet. The APS TT owners I know run a minimum of 275 width rears, and a few of them use Comp-R's on the street.

(Note: Most of my experience is with the 350Z, but since the Z33 and V35 are almost identical most of this information is still applicable.)

[sh@un]

In both systems, there is no point saying "they draw power" because the net gain is always higher power than the aspirated engine would have. As far as what is the better system for efficiency and power, the turbos win hands down. After overcoming the initial inertia of the rotating assembly low in the rev range and getting into its more efficient operating zones, the turbocharger is exemplary in harnessing what would otherwise be the considerable wasted thermal energy in the exhaust. Consider big trucks for a moment- they need to be as efficient as possible at the required power level....and they all use turbos. Also look at the Horsepower Heros comp- dominated by twin-turbo V8s these days.

[scathing]

The other thing is that most modern supercharger kits tend to use centrifugal superchargers, for packaging reasons, which are inherently flawed in their design.

They use a turbine compressor (instead of a positive displacement like the screw type etc blowers) attached to a belt, which means it has all the flaws of a turbo relative to a supercharger, and all the flaws of a supercharger relative to turbos.

That said, I'm still debating with myself whether I want to run the HKS Rotrex supercharger kit (for all its inefficiencies) and aim for around 240rwkW (which should keep the car "usable" in the lower gears) or just pull my finger out and get twin turbos on my car. 280rwkW+ is a bit too much for me, I think.

Edited November 22, 2006 by scathing