Turbo versus Centrifugal versus Roots
09-20-2005, 02:03 PM
#1
NCM, WSCC & SCC Member
Thread Starter
Turbo versus Centrifugal versus Roots
http://www.hotrod.com/toc/113_0308_toc/index.html
Excerpt from Hot Rod magazine.
Quote
This graph appeared in "Battle of the Boost", Hot Rod Magazine in the August 2003 issue. Turbo systems are the clear choice if you are looking to generate usable horsepower between 2500 and 5000 rpm.
"Given equivalent vehicles, the turbo would easily motor away from the centrifugal in an acceleration contest......The turbo offered massive midrange torque production, the only system to exceed 600 lb-ft. Need more convincing? At 4,000 rpm, the turbo was more than 100 lb-ft. stronger than either the Roots or centrifugal." Richard Holdener, "Battle of the Boost"
2004 SEMA
STS won the GM Design Award for 2004 Best Performance Product. The judging was done by 3 of GM's best powertrain engineers
Excerpt from Hot Rod magazine.
Quote
This graph appeared in "Battle of the Boost", Hot Rod Magazine in the August 2003 issue. Turbo systems are the clear choice if you are looking to generate usable horsepower between 2500 and 5000 rpm.
"Given equivalent vehicles, the turbo would easily motor away from the centrifugal in an acceleration contest......The turbo offered massive midrange torque production, the only system to exceed 600 lb-ft. Need more convincing? At 4,000 rpm, the turbo was more than 100 lb-ft. stronger than either the Roots or centrifugal." Richard Holdener, "Battle of the Boost"
2004 SEMA
STS won the GM Design Award for 2004 Best Performance Product. The judging was done by 3 of GM's best powertrain engineers
Last edited by #001 2001 Z06; 09-20-2005 at 05:27 PM.
09-20-2005, 03:12 PM
#3
Team Owner
Originally Posted by #001 2001 Z06
"Given equivalent vehicles, the turbo would easily motor away from the centrifugal in an acceleration contest......
Mark
09-20-2005, 03:16 PM
#4
Melting Slicks
I've been tempted by turbos since they don't have the same parasitic drag as a supercharger does. But the modified Porsche 944 Turbo I used to own didn't have the throttle responsiveness I wanted, it's a slightly uncomfortable thing that keeps you from driving with full confidence, like the sideways skip of C5s on a corner bump. The turbo dyno sheets I've seen for C5s also show an non-linear torque curve just like the 944 Turbo. To me that means it's less enjoyable to drive overall, at least not with full confidence.
I think if I had to do it over again, I'd do a C6 coupe with Nitto R2s, tight (coilover?) suspension, manual, and do a high-compression supersized motor and straight pipes, without all the additional moving parts that a turbo or supercharger adds. Something more like a powerful gocart with a little bling, and less of a DIY convertible musclecar that spits and chatters and spins DRs on the freeway when it's not broken.
I think if I had to do it over again, I'd do a C6 coupe with Nitto R2s, tight (coilover?) suspension, manual, and do a high-compression supersized motor and straight pipes, without all the additional moving parts that a turbo or supercharger adds. Something more like a powerful gocart with a little bling, and less of a DIY convertible musclecar that spits and chatters and spins DRs on the freeway when it's not broken.
09-20-2005, 04:34 PM
#5
Originally Posted by blu00rdstr
I've been tempted by turbos since they don't have the same parasitic drag as a supercharger does. But the modified Porsche 944 Turbo I used to own didn't have the throttle responsiveness I wanted, it's a slightly uncomfortable thing that keeps you from driving with full confidence, like the sideways skip of C5s on a corner bump. The turbo dyno sheets I've seen for C5s also show an non-linear torque curve just like the 944 Turbo. To me that means it's less enjoyable to drive overall, at least not with full confidence.
I like the instant power of a s/c. I don't want more than 800rwhp..... just want it predictable with no sudden rush of power.
09-20-2005, 04:57 PM
#6
Melting Slicks
Originally Posted by #001 2001 Z06
http://www.hotrod.com/toc/113_0308_toc/index.html
Excerpt from Hot Rod magazine.
Quote
This graph appeared in "Battle of the Boost", Hot Rod Magazine in the August 2003 issue. Turbo systems are the clear choice if you are looking to generate usable horsepower between 2500 and 5000 rpm.
"Given equivalent vehicles, the turbo would easily motor away from the centrifugal in an acceleration contest......The turbo offered massive midrange torque production, the only system to exceed 600 lb-ft. Need more convincing? At 4,000 rpm, the turbo was more than 100 lb-ft. stronger than either the Roots or centrifugal." Richard Holdener, "Battle of the Boost"
Excerpt from Hot Rod magazine.
Quote
This graph appeared in "Battle of the Boost", Hot Rod Magazine in the August 2003 issue. Turbo systems are the clear choice if you are looking to generate usable horsepower between 2500 and 5000 rpm.
"Given equivalent vehicles, the turbo would easily motor away from the centrifugal in an acceleration contest......The turbo offered massive midrange torque production, the only system to exceed 600 lb-ft. Need more convincing? At 4,000 rpm, the turbo was more than 100 lb-ft. stronger than either the Roots or centrifugal." Richard Holdener, "Battle of the Boost"
09-20-2005, 05:05 PM
#7
NCM, WSCC &amp;amp; SCC Member
Thread Starter
If you guys find a fresher article feel free to post it.
Taking the time to do it yourself and taking about someone's thing are two different things. If anything, I have been the biggest proponent here, of getting best and biggest bang for the members buck, bar none, over the last three years.
Meanwhile I am very busy doing
http://forums.corvetteforum.com/show...26&forum_id=45
Corvettes for
HURRICANE
RELIEF
Contribute now
1-866-440-6700
Taking the time to do it yourself and taking about someone's thing are two different things. If anything, I have been the biggest proponent here, of getting best and biggest bang for the members buck, bar none, over the last three years.
Meanwhile I am very busy doing
http://forums.corvetteforum.com/show...26&forum_id=45
Corvettes for
HURRICANE
RELIEF
Contribute now
1-866-440-6700
Last edited by #001 2001 Z06; 09-20-2005 at 05:13 PM.
09-20-2005, 09:37 PM
#12
Racer
Member Since: Feb 2005
Location: Edmonton Alberta
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Originally Posted by HIGHRPM
I like the instant power of a s/c. I don't want more than 800rwhp..... just want it predictable with no sudden rush of power. 
Umm..... I am starting to sound like mdhmi ...
Dan
09-20-2005, 10:47 PM
#13
To the Original Poster. I see you live in CA. Did that magazine article tell you who is selling a Turbo kit with for the Corvette that has an EO number on it? Yeah, there isn't one! That is one reason that the Maggies and the Vortechs are selling so well these days both have EO numbers.
09-20-2005, 11:07 PM
#14
NCM, WSCC &amp;amp; SCC Member
Thread Starter
STS turbo systems are also one of the few turbo systems that have a CARB EO #, which means they've been tested and shown not to interfere with the emissions of a vehicle. Currently, the Camaro, 5.3L and 6.0L GM Trucks/SUVs and the Pontiac GTO are covered under EO# D-593.
The Corvette EO will be coming in shortly for all there kits. The emissions came in at 25% of what the car was before the install. This is without the mufflers. The manifolds and cats are not moved, so there is zero problem there. You do what you will, after the cats.
Yes, the Intercooled Magnussen has an E.O.#, The non-intercooled one does not.
Vortech, does have an E.O. for all their products. The big joke, is that some are saying they made a new kit C5/Z06. So... Paul Snell & Tom Carrol (Carrol Supercharging/Blower works) have had a C5 setup out for years, that produces the same power and it fully track reliable. FYI, So has Arizona Speed and Marine.
The Corvette EO will be coming in shortly for all there kits. The emissions came in at 25% of what the car was before the install. This is without the mufflers. The manifolds and cats are not moved, so there is zero problem there. You do what you will, after the cats.
Yes, the Intercooled Magnussen has an E.O.#, The non-intercooled one does not.
Vortech, does have an E.O. for all their products. The big joke, is that some are saying they made a new kit C5/Z06. So... Paul Snell & Tom Carrol (Carrol Supercharging/Blower works) have had a C5 setup out for years, that produces the same power and it fully track reliable. FYI, So has Arizona Speed and Marine.
09-20-2005, 11:40 PM
#16
Safety Car
Originally Posted by Bigben
To the Original Poster. I see you live in CA. Did that magazine article tell you who is selling a Turbo kit with for the Corvette that has an EO number on it? Yeah, there isn't one! That is one reason that the Maggies and the Vortechs are selling so well these days both have EO numbers.
09-20-2005, 11:56 PM
#17
Team Owner
I think it's important to recognize that Corvette Forum membership grows daily and not all of the newer users have seen the Turbo vs Blower debate threads.
I still enjoy them, FWIW.
Mark
I still enjoy them, FWIW.
Mark
09-21-2005, 02:39 AM
#19
NCM, WSCC &amp;amp; SCC Member
Thread Starter
This is the problem, with having so many options on the menu. Next month, someone will have a Flux Capacitor, Hydrogen engine, or be able to recycle the water created by a motor and produce twice the efficiency and horsepower (This is currently happening).
Make us all, look silly. Guaranteed our kids will laugh at us.
Make us all, look silly. Guaranteed our kids will laugh at us.
09-21-2005, 06:40 AM
#20
Drifting
Member Since: Dec 2002
Location: Forest Hill MD
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Originally Posted by blu00rdstr
I've been tempted by turbos since they don't have the same parasitic drag as a supercharger does. But the modified Porsche 944 Turbo I used to own didn't have the throttle responsiveness I wanted, it's a slightly uncomfortable thing that keeps you from driving with full confidence, like the sideways skip of C5s on a corner bump. The turbo dyno sheets I've seen for C5s also show an non-linear torque curve just like the 944 Turbo. To me that means it's less enjoyable to drive overall, at least not with full confidence.
I think if I had to do it over again, I'd do a C6 coupe with Nitto R2s, tight (coilover?) suspension, manual, and do a high-compression supersized motor and straight pipes, without all the additional moving parts that a turbo or supercharger adds. Something more like a powerful gocart with a little bling, and less of a DIY convertible musclecar that spits and chatters and spins DRs on the freeway when it's not broken.
I think if I had to do it over again, I'd do a C6 coupe with Nitto R2s, tight (coilover?) suspension, manual, and do a high-compression supersized motor and straight pipes, without all the additional moving parts that a turbo or supercharger adds. Something more like a powerful gocart with a little bling, and less of a DIY convertible musclecar that spits and chatters and spins DRs on the freeway when it's not broken.
I had a supercharger and the chance to do it over again and did exactly what you stated. No regrets here. I love my car for the street and the track. 447 n/a beast that will run with the best of the high HP cars.
