twin turbo or supercharger

im thinking about a twin turbo or a supercharger for my 97 z28 what would be better for all around driving and what are some good names and prices of each

There is no twin turbo currently available for the LT1. As for superchargers, how bout ATI procharger or Vortech

TT: more hp/boost potential, LOTS more $$$ and complications. It would basically be a "custom" job. Cost a small fortune to have it done or you could DIY if you have a fully equipped shop and mega fabrication skills. Just my 2 cents.

Rich

I'd take the turbo any day.. when you're just driving around normally (which, for most people, is honestly most of the time) the turbo is along for the ride, it isnt really doing anything, not putting any stress on anything... blower is always there :no:

Turbo... no doubt about it.

I'd have to agree with rskrause on this one. Turbo = lots of complication and $$$. And a supercharger is no less "along for the ride" than a turbo.

Mike

it isnt really doing anything, not putting any stress on anything... blower is always there :no:I've talked to S/Ced people before, and they usually say at idle they don't see any boost, or when streetdriving they usually don't see a lot of boost.

But I don't know much about FI, take what I say with a grain of salt.

With a bypass valve, the supercharger freewheels at idle and cruise, just like a turbo. They don't make boost until you get past 3/4 throttle or so.

Mike

With a bypass valve, the supercharger freewheels at idle and cruise, just like a turbo. They don't make boost until you get past 3/4 throttle or so.Freewheels? So its kind of like an air conditioner pulley, just rolling along until you actually turn on the AC? How does the "valve" work?

The bypass valve allows air to recirculate from the discharge to the inlet of the blower at idle and cruise. This keeps the load off of it. It basically spins with no load, just like a turbo.

Mike

A blower should not produce enough boost at idle/cruise to overcome the vacuum generated by the engine. Unless you cruise at WOT. :D

I disagree with the statement that a supercharger produces no load on the engine at cruise/idle, the simple fact that the supercharger is constantly spinning is enough to produce at least some load on the engine. The bypass is simply there to keep compressed air from backing up and damaging the supercharger when the throttle blades are not open.

I agree with 97WS6. Just like a bypass valve on a turbo, it's not really there to make the turbo useless unless it's at WOT. I'd go with a supercharger all the way, turbos are for 4 bangers. (And Lingenfelter) :D

Plus, a big turbo has turbo lag. I know it's not much anymore, but I like superchargers better anyway. Who says you have to get a big one? A little extra boost never hurt anyone, and if you're going to go overboard, make sure you beef up your internals. ;)

Turbos are great if you know how to tune them. But a blower is easy, it just sits there and does it's thing. All in all, it's up to you buddy. Just have fun with it.

~Paul~

I would say superchargers are better for a daily driven application.

Superchargers aren't exactly 'no load' at idle/cruise. They still blow just as much air at 1/2 throttle as they do at WOT since its tied directly to the crank. The extra air that the supercharger generates at part throttle operation is just blown off via the bleed valve. When you stick you're foot in it, the bleed valve closes based on manifold pressure allowing the SC to build positive manifold pressure. As was also stated, the bleed valve also prevents a pressure backwash into the supercharger.

Turbo does pretty much the same thing. The biggest difference is that a turbo is driven from waste exhaust gas, where a supercharger will rob some power from the crank. Supercharger kits are readily available, and are not all that hard to install. Turbo kits aren't so readily available and require some tools and time to get installed.

Both definately require tuning and you must definately consider fuel delivery requirements.

Turbo kits aren't so readily available and require some tools and time to get installed.

I wouldn't exactly say that. :)

Really?!? Why not?

Turbo > S/c. The level of control alone makes it worthwhile. No need to swap pullies, etc... Can't overlook the power/tq gains over a belt-driven blower either. I really think it is the superior of the two F/I's.

Go with a single if possible. Less complicated, and probably a bit cheaper due to it having lesser parts than TT kit.

Really?!? Why not?

PTK's kit can be installed with basic hand tools in about the amount of time it takes to install a blower and is can be had fairly easily. If you're going the extremely easy route, the :gasp: STS kit can be installed in just a few hours at a muffler shop no less. :)

**Edit** Well, maybe not in the time it takes to install a blower, but still it can be done over a weekend.

I agree with 97WS6. Just like a bypass valve on a turbo, it's not really there to make the turbo useless unless it's at WOT. I'd go with a supercharger all the way, turbos are for 4 bangers. (And Lingenfelter) :D


you got your doors blown off by a turbo car, didnt you??? :D :p

you got your doors blown off by a turbo car, didnt you??? :D :p

Smack! :lol:

Personally, I'm close to foaming at the mouth to order myself a hot parts setup from Jose, but I've got to finish my truck first. I've gone from wanting a moderate T60 something to the point where I've decided on a PT88. 9's here I come. :D