Whats the Diff SC vs TC
Post Fiend
Joined: Oct 2003
Posts: 6,214
Likes: 13
From: New Jersey
Both are essentially scroll-shaped compressors (high powered fans).
The supercharger is driven by a belt to the crankshaft, which drives a gear-up assembly, to spin the "fan" at about 70-100K RPM.
Turbochargers have a second scroll shaped comrpessor, which is driven by the exhaust, which in turn spins the first compressor (fan) also to 70-100K rpm.
The advantage of a supercharger is typically you can have boost right away, since it's always spinning.
The turbocharger typically can create more boost, but is a little slow to get going off idle, since it relies on exhaust heat and pressure.
While these "rules of thumbs" are somewhat true, a well designed system using either can provide good performance off idle, to higher RPMs, depending how you build your system.
The supercharger is driven by a belt to the crankshaft, which drives a gear-up assembly, to spin the "fan" at about 70-100K RPM.
Turbochargers have a second scroll shaped comrpessor, which is driven by the exhaust, which in turn spins the first compressor (fan) also to 70-100K rpm.
The advantage of a supercharger is typically you can have boost right away, since it's always spinning.
The turbocharger typically can create more boost, but is a little slow to get going off idle, since it relies on exhaust heat and pressure.
While these "rules of thumbs" are somewhat true, a well designed system using either can provide good performance off idle, to higher RPMs, depending how you build your system.
Posting Guru
Joined: Mar 2003
Posts: 1,253
Likes: 2
From: spartanburg, SC
http://www.turbomustangs.com/turbotech/main.htm
A good TC setup is more efficient than a good SC setup. (makes more power on the same boost)
TCs are not 100% efficient, they cause back pressure, usually 1.5-2.5 times the intake pressure under boost.
Go with what works best for you.
Fred is talking about centrifugal SC.
roots and twinscrew are different.
A good TC setup is more efficient than a good SC setup. (makes more power on the same boost)
TCs are not 100% efficient, they cause back pressure, usually 1.5-2.5 times the intake pressure under boost.
Go with what works best for you.
Fred is talking about centrifugal SC.
roots and twinscrew are different.
Last edited by F150daniel; Jul 11, 2005 at 01:47 PM.
Post Fiend
Joined: Jun 2003
Posts: 5,983
Likes: 2
Yes, I think my KB is 1:3, so the lobes spin at about 18K when the motor is spinning at 6K.
Edit: I take that back, if I'm not mistaken, one lobe spins 1.5x the other; so one is 12K the other (female) is 18K? Do I have it right?
Edit: I take that back, if I'm not mistaken, one lobe spins 1.5x the other; so one is 12K the other (female) is 18K? Do I have it right?
Senior User
Joined: Apr 2003
Posts: 164
Likes: 0
From: Heart of Dixie
Boost from a centrifugal supercharger climbs linearly with engine rpm, whereas boost from a turbo climbs whenever it has enough exhaust volume and velocity to get the turbine up to speed. A properly sized turbo (or turbo's) can provide boost in the low rpm range. www.turbomustangs.com has a lot of good technical info.
FTE Leadership Emeritus
Joined: May 2004
Posts: 18,787
Likes: 30
From: Melbourne, Aus
A turbo requires enough exhaust gas to get it spinning, and then they force more air into the combustion chamber, so more air can come out the exhaust and drive the turbo...
There are a few different types of superchargers
Centrifugal - a more linear air flow, acts like a simple pump
Roots/Twinscrew - allthough fundamentally different, power delivery is remarkabley similar between these two systems (A lot more off idle torque)
There are a few different types of superchargers
Centrifugal - a more linear air flow, acts like a simple pump
Roots/Twinscrew - allthough fundamentally different, power delivery is remarkabley similar between these two systems (A lot more off idle torque)
New User
Joined: Jul 2005
Posts: 11
Likes: 0
From: Rhode Island
There is little to no mods at all to do to your engine if you go with a supercharger. Esp. the 5.0 engines=they bolt right on.
Trending Topics
Senior User
Joined: Oct 2003
Posts: 215
Likes: 0
From: Central Coast, CA
Another observation to add is that the exit oil from a supercharger is no where near as hot a turbochargers'.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Thread Starter
|
Laughing Gas
Joined: Jun 2005
Posts: 939
Likes: 1
So looking at a KenneBell and a Roush, (think the Kennebell is a supercharger, dont know about the roush).. is there something else that one should be looking for in a Turbo/supercharger..
Also would adding putting either on your truck Void the warranty of the truck?
Also would adding putting either on your truck Void the warranty of the truck?
Thread Starter
|
Laughing Gas
Joined: Jun 2005
Posts: 939
Likes: 1
Boost from a centrifugal supercharger climbs linearly with engine rpm, whereas boost from a turbo climbs whenever it has enough exhaust volume and velocity to get the turbine up to speed. A properly sized turbo (or turbo's) can provide boost in the low rpm range. www.turbomustangs.com has a lot of good technical info.
Since the Supercharger is baiscally always running, and the turbo is waiting for more go-pedal. What is the effect on Gas mileage with both.
The supercharger is driven by a belt to the crankshaft, which drives a gear-up assembly, to spin the "fan" at about 70-100K RPM.
Turbochargers have a second scroll shaped comrpessor, which is driven by the exhaust, which in turn spins the first compressor (fan) also to 70-100K rpm.
The advantage of a supercharger is typically you can have boost right away, since it's always spinning.
The turbocharger typically can create more boost, but is a little slow to get going off idle, since it relies on exhaust heat and pressure.
While these "rules of thumbs" are somewhat true, a well designed system using either can provide good performance off idle, to higher RPMs, depending how you build your system.
Turbochargers have a second scroll shaped comrpessor, which is driven by the exhaust, which in turn spins the first compressor (fan) also to 70-100K rpm.
The advantage of a supercharger is typically you can have boost right away, since it's always spinning.
The turbocharger typically can create more boost, but is a little slow to get going off idle, since it relies on exhaust heat and pressure.
While these "rules of thumbs" are somewhat true, a well designed system using either can provide good performance off idle, to higher RPMs, depending how you build your system.
However, if you lose turbo the truck will still run. If I lose the Supercharger, Im Screwed..
And what about the engine warranty?
Someone needs to do a good SuperCharger / Turbo FAQ section.
Unless ive missed it somewhere
FTE Leadership Emeritus
Joined: May 2004
Posts: 18,787
Likes: 30
From: Melbourne, Aus
Check this Read First: thread at the top of the forum!!!
https://www.ford-trucks.com/forums/s...12#post2829112
https://www.ford-trucks.com/forums/s...12#post2829112