supercharged vs turbocharged

[saftey]

im trying to confirm somestuff .a supercharger requires a power source,has better low end torque than a turbo because it doesnt have to wait to spool up ?
a turbo charger uses exaust to spool but doesnt deliver low end torque?supercharger better for dragging?turbo for high rpms?or is a supercharger good at all rpms?im very lost any advice?oh and if a sc is belt driven whats it power source?

 

[vi edit]

lookie here

lookie here..or here for non-subscriber

 

[saftey]

thanks pal!that really helped!dvsdgnfds

 

[CraigRT]

The facts you just laid down look pretty good to me.. those are the major differences and pros and cons for each application.

 

[LAUST]

yeah, Vi's links are right on... go there and scroll to the more bottom half... many of the beginning messages were full of blabbin and rumor explanations

EDIT:

As far as the top 2 things wrong right away, not all Superchargers are boost off idle (centrifical), yes Turbo's do have to spool but if the system is done right lag isn't really a factor at all... My 2 biggest things for being aginst a Turbo in my application was I wanted a Boost off idle type (Twin Screw) and also Turbo's have serious heat issues in some vehicles, GM trucks are one of them, if you talk to the guys at "Performance Torque Converters" (the guys with the Purple Converters), ask em about their used to be Turbo Charged but now currently Supercharged Suburban that tows over 14,000lbs on a smallblock in overdrive when it was TC'd they killed all the plastic and rubber under the hood.

 

[Howard]

A supercharged is run off a belt attached to the engine's crankshaft. I'm not sure about the other types of superchargers, but centrifugal (impeller-type turbine) superchargers use gears to multiply rotational speed.

Turbochargers have two parts - a compressor (cold-side) and a turbine (both are turbines, but the names are what they are... don't ask - this is hot-side BTW). The turbine is attached to the exhaust manifold and drives the compressor by means of the exhaust gases spinning the turbine. The compressor sits in the air intake and increases the pressure of the incoming air - and heats it too.

Somebody let me know if my terms aren't quite right.

 

[LAUST]

Good job Yucky

 

[Howard]

LAUST - they should have been using silicone anyway.

Twin screw superchargers are also called Lysholm superchargers.

 

[LAUST]

Either way I'd never ask for that heat under the hood or wish it on someone , in any situation, it's never a good thing... I'd rather just get "Blown"

 

[Howard]

What kind of oil you running? (grade and type - petro/synthetic)

Do you use any coolant additives?

 

[Howard]

<< has better low end torque than a turbo because it doesnt have to wait to spool up? >>


Not anymore. Some turbos have built in spooling motors. Cool, eh?


<< supercharger better for dragging? >>


You running an automatic, sonny? Just pull the clutch and rev.

 

[DaLeroy]

<<

<< has better low end torque than a turbo because it doesnt have to wait to spool up? >>


Not anymore. Some turbos have built in spooling motors. Cool, eh?


<< supercharger better for dragging? >>


You running an automatic, sonny? Just pull the clutch and rev. >>




For dragging (1/4 mile) an automatic is the best option!

 

[Ns1]

yeah but who wants to be known as the wuss with an automatic

 

[LAUST]

SAE 50 Petro

 

[LAUST]

Clutches are not a challenge...

 

[Mill]

I would like to see a manual car launch and run a 1/4 with around 500hp.

 

[Pacfanweb]

<<I would like to see a manual car launch and run a 1/4 with around 500hp. >>

Watch Pro Stocks, they do it with over 1000 hp. Of course, they're clutchless shift models, so that takes some of the fun out of it.


You best bet to see high HP cars with sticks is go to a national event and watch Super Stocks.

It's pretty cool to see a small block launch at 13000 rpms and bounce the front tires up in the first 3 gears.

IHRA Modified class is a good place to see them, too.

 

[Demon-Xanth]

An auto has the advantage of being dollar for dollar stronger and more available. An automatic transmission uses planetary gear sets w/ 3 points of contact vs. a manual's helical gears w/ one point.

Lencos are sometimes used because of thier bulletproof reliability, they are planetary manual transmissions w/ one lever/gear. They require cutting up the floorboard of a car and are quite expensive.

A TH400 is pretty strong and cheap. Parts for tuning are widely available and there's a kit for just about everything.


Though the torque converter is a give and take situation, sometimes it helps, sometimes it hurts. It largely depends on how the rest of the car is tuned. Note that manuals are more likely to shock the tires and cause excessive wheelspin.


Back to the question of the turbo. They started falling out of favor because the catilytic converter requires heat to work, a turbo robs and dissipates some of the exhaust heat (causing under the hood heat) and the exhaust takes longer to get working. Which in some states (california) makes it harder to get smog certification. Also they are more difficult to plumb as the exhaust needs to be routed differently. They can however, show greater rewards on the top end.

 

[Ramses]

I've had this conversation before, and will not get into it again. I will just say that the new Mustang Cobra is running an eaton blower, not a turbo. With all the resources Ford has, like them or not, they could and I think would have run a turbo if it was a better option, they have had turbo cars before.

But they didnt, good old blower, sittin there looking pretty through all the wires and hoses. No heat, no lag, no pipes, it's just there, seamless.

 

[LAUST]

Yeah, Milleniums and my refrence is more to real world cars...

 

[Zebo]

Hey LAUST...


What type of SC does my wife 99 regal gs have? 3.8l and do I need to lube it anything special other than regualr oil chages?

Carbonyl<---destroys cars

 

[Howard]

Clutchless shift? Like sequential?

 

[LAUST]

Same as the Pontiac Grand Prix, GTP..

 

[Howard]

If you have enough money you can pony up (no pun intended) for an electronic launch controller. Couple that with a quintuple-disc clutch and automatics would have to put up a real fight. Plus you'd get higher power at the start if you're running a turbo.

 

[PowerMacG5]

In the simplest sense, superchargers and turboshargers do the same thing. A supercharger runs of of a belt connected to your engine, this compresses the incoming air and then this high pressure air is fed into the air intake of your car. A turbocharger runs of the exhaust system. There are two components to the turbocharger, the turbine and compressor. The turbine is spun by the very hot and fast moving exhaust gas. The turbine then turns the compressor. The compressor then compresses the gas and sends the high pressure air to the air intake. For a turbocharger to be effective you want cold air, not hot exhaust heated air. To cool the air it is fed to an intercooler and then to the air intake. Cooler air gives better performance when combusted. In older turbocharged wngines, drivers would experiance something known as turbo-lag. This is when the driver floors the car and does not feel the power from the turbocharger for a few seconds. This was do to the turbine in the turbocharger not getting up to speed quick enough. Newer turbochargers do not have this effect because they have better ball bearings which allow it to get up to speed fairly quickly. I personally like a turbocharger because they offer better performance.