Superchargers vs. Turbochargers
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From: South Carolina
Superchargers vs. Turbochargers
I found this article @ MT - Discuss???
“Turbocharger manufacturers will talk about engine downsizing, but they don’t talk about “downspeeding.” And that’s where we are effective because we can deliver air to the engine immediately,” said Davis, who believes that a roots supercharger, combined with an ECU programmed to operate at low rpms, provides immediate throttle response, something that a turbocharger may not be able to deliver. Lower engine rpms help reduce fuel use. Roots superchargers have also been credited for increased fuel economy under cruise.
Read More: Superchargers vs. Turbochargers on Small Displacement Engines
“Turbocharger manufacturers will talk about engine downsizing, but they don’t talk about “downspeeding.” And that’s where we are effective because we can deliver air to the engine immediately,” said Davis, who believes that a roots supercharger, combined with an ECU programmed to operate at low rpms, provides immediate throttle response, something that a turbocharger may not be able to deliver. Lower engine rpms help reduce fuel use. Roots superchargers have also been credited for increased fuel economy under cruise.
Read More: Superchargers vs. Turbochargers on Small Displacement Engines
Some critics believe that turbochargers are more efficient than superchargers (superchargers suffer from parasitic losses because they are spun by the engine crankshaft, as opposed to the exhaust gas-driven turbine in a turbocharger). Davis disagrees, citing immediate response as an equalizer.
Read more: Superchargers vs. Turbochargers on Small Displacement Engines
Read more: Superchargers vs. Turbochargers on Small Displacement Engines
I mean really, why do most LSJ guys go turbo instead of TVS?
O and I like how they had the LSJ at the top of the page
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Joined: 08-09-09
Posts: 920
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From: Downey
personally, i like this topic haha!
but being an LSJ owner and kinda researching this a lot, you start to realize the perks of going turbo especially the small turbo of the the LNF, the better option would be to go centrifugal SC then your doing better in both cases
but continue!!
but being an LSJ owner and kinda researching this a lot, you start to realize the perks of going turbo especially the small turbo of the the LNF, the better option would be to go centrifugal SC then your doing better in both cases
but continue!!
And why do most LSJ turbo converts abandon their project in less then a year?
I think it is silly to argue Turbochargers vs Superchargers. They each have benefits over the other.
I think it is silly to argue Turbochargers vs Superchargers. They each have benefits over the other.
Last edited by ebristol; Jun 29, 2011 at 11:02 AM.
Joined: 12-30-07
Posts: 14,079
Likes: 197
From: NEPA
personally, i like this topic haha!
but being an LSJ owner and kinda researching this a lot, you start to realize the perks of going turbo especially the small turbo of the the LNF, the better option would be to go centrifugal SC then your doing better in both cases
but continue!!
but being an LSJ owner and kinda researching this a lot, you start to realize the perks of going turbo especially the small turbo of the the LNF, the better option would be to go centrifugal SC then your doing better in both cases
but continue!!
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Joined: 02-17-10
Posts: 249
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From: tampa
they both have there perks. i personally am a turbo fan. these are the benifits to me:
turbo benifits:
more power as there is no loss in power due to a drive belt
easier construction for a diy-if you can weld exhaust, you can build a turbo kit
easier to customize to your liking-small turbo for low boost or large turbo for high end boost
boost is based on engine load-great benefit to me as i build them for high end power so i can drive around town and never boost. also when gas is high i can put cheap 87 octane in and never boost.
parts are everywhere
easily upgradable
can be mounted in numerous places if room is an issue-ex: rear mounted setup
love the noise
turbo disadvantages:
more parts are involved
more time for install/design
harder to tune
supercharger benifits:
low rpm power-no lag
whinning noise
easier to install
less parts
easier to tune-linear based fuel curve
can add fuel economy when crusing
supercharger disadvantages:
harder to customize to a vehicle-hardest part to do is make a manifold or bracket to fit your vehicle.
limited options for vehicles used
belt driven-requires the addition of pulleys to the engine crankshaft
less power output-engine can use 20% or more of its power just to turn the supercharger
roots type blowers require an aftercooler which is less efficient then an air to air intercooler
heat soak
limited aftermarket parts availability
limited in mounting areas
turbo benifits:
more power as there is no loss in power due to a drive belt
easier construction for a diy-if you can weld exhaust, you can build a turbo kit
easier to customize to your liking-small turbo for low boost or large turbo for high end boost
boost is based on engine load-great benefit to me as i build them for high end power so i can drive around town and never boost. also when gas is high i can put cheap 87 octane in and never boost.
parts are everywhere
easily upgradable
can be mounted in numerous places if room is an issue-ex: rear mounted setup
love the noise
turbo disadvantages:
more parts are involved
more time for install/design
harder to tune
supercharger benifits:
low rpm power-no lag
whinning noise
easier to install
less parts
easier to tune-linear based fuel curve
can add fuel economy when crusing
supercharger disadvantages:
harder to customize to a vehicle-hardest part to do is make a manifold or bracket to fit your vehicle.
limited options for vehicles used
belt driven-requires the addition of pulleys to the engine crankshaft
less power output-engine can use 20% or more of its power just to turn the supercharger
roots type blowers require an aftercooler which is less efficient then an air to air intercooler
heat soak
limited aftermarket parts availability
limited in mounting areas
Senior Member
Joined: 03-12-07
Posts: 1,585
Likes: 1
From: Columbus, Ohio
they both have there perks. i personally am a turbo fan. these are the benifits to me:
turbo benifits:
more power as there is no loss in power due to a drive belt
easier construction for a diy-if you can weld exhaust, you can build a turbo kit
easier to customize to your liking-small turbo for low boost or large turbo for high end boost
boost is based on engine load-great benefit to me as i build them for high end power so i can drive around town and never boost. also when gas is high i can put cheap 87 octane in and never boost.
parts are everywhere
easily upgradable
can be mounted in numerous places if room is an issue-ex: rear mounted setup
love the noise
turbo disadvantages:
more parts are involved
more time for install/design
harder to tune
supercharger benifits:
low rpm power-no lag
whinning noise
easier to install
less parts
easier to tune-linear based fuel curve
can add fuel economy when crusing
supercharger disadvantages:
harder to customize to a vehicle-hardest part to do is make a manifold or bracket to fit your vehicle.
limited options for vehicles used
belt driven-requires the addition of pulleys to the engine crankshaft
less power output-engine can use 20% or more of its power just to turn the supercharger
roots type blowers require an aftercooler which is less efficient then an air to air intercooler
heat soak
limited aftermarket parts availability
limited in mounting areas
turbo benifits:
more power as there is no loss in power due to a drive belt
easier construction for a diy-if you can weld exhaust, you can build a turbo kit
easier to customize to your liking-small turbo for low boost or large turbo for high end boost
boost is based on engine load-great benefit to me as i build them for high end power so i can drive around town and never boost. also when gas is high i can put cheap 87 octane in and never boost.
parts are everywhere
easily upgradable
can be mounted in numerous places if room is an issue-ex: rear mounted setup
love the noise
turbo disadvantages:
more parts are involved
more time for install/design
harder to tune
supercharger benifits:
low rpm power-no lag
whinning noise
easier to install
less parts
easier to tune-linear based fuel curve
can add fuel economy when crusing
supercharger disadvantages:
harder to customize to a vehicle-hardest part to do is make a manifold or bracket to fit your vehicle.
limited options for vehicles used
belt driven-requires the addition of pulleys to the engine crankshaft
less power output-engine can use 20% or more of its power just to turn the supercharger
roots type blowers require an aftercooler which is less efficient then an air to air intercooler
heat soak
limited aftermarket parts availability
limited in mounting areas
I'm a supercharged kind of guy. To each their own.
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Joined: 07-10-11
Posts: 44
Likes: 0
From: Ellenton FL
Roots style superchargers are linear boost, you dont make max boost untill your max rpm
Nothing beats the turbo lag of a big turbo, high horsepower car....nothing, nothing, nothing....POWER....
Turbo controllers can run 18psi on 1st gear, 22 psi on 2nd gear and run 26psi on all the rest
A friend of mine is running in the NASA events and he has to stay in his power to weight ratio so his boost controller is set up to run 12.5 psi at low rpm and 6 psi at red line. Here is his Dyno of his KA24DET 240sx
Last edited by 1993ka24det; Aug 23, 2011 at 02:58 PM.
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