SC or NA better MPG and Drivability?
#1
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Thread Starter
SC or NA better MPG and Drivability?
Like many others seeking performance upgrades, I’m torn between keeping my 2017 GS Naturally Aspirated (NA) or going Supercharged (SC). While I crave more power, I don’t want to loose drivability or too much fuel economy. I love the sound of some cam lope and don’t mind it sucking all the fuel it needs when I’m having fun. However, I still want decent MPG when on long trips.
So, with respect to fuel mileage and overall around town driveabily, how would a 550 whp NA setup compare with a 600 whp SC setup? Will a stage 2/3 cam NA setup suck too much fuel?
So, with respect to fuel mileage and overall around town driveabily, how would a 550 whp NA setup compare with a 600 whp SC setup? Will a stage 2/3 cam NA setup suck too much fuel?
#2
Melting Slicks
If you want it to drive like stock I'd recommend going with a supercharger. I make just under 600whp and the car drive exactly as it did stock. The mpg also is like stock until you get into boost.
i also love the sound of a car with a lumpy cam but they tend to shake your fillings out of your head. I went with the Edelbrock E force with Eaton 2300 rotors, they give you a 3 year 36k mile full drive train warranty.
i also love the sound of a car with a lumpy cam but they tend to shake your fillings out of your head. I went with the Edelbrock E force with Eaton 2300 rotors, they give you a 3 year 36k mile full drive train warranty.
Last edited by BlueDevilZ51; 12-05-2018 at 05:04 PM.
#4
Drifting
#5
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Thread Starter
Thanks. Spring replacement will be something I will have to consider for long term maintenance cost. However, my main fear is loosing something like 5-10 mpg while cruising. I don’t mind it when my foot is in it, but I’d be disappointed if it got worse highway mileage than my truck.
Anyone with a big cam have some input on expected mpg?
Anyone with a big cam have some input on expected mpg?
#6
I'm not a C7 owner. I don't know if a turbocharger upgrade is one of your choices or something you'd consider.
I've owned both supercharged and turbocharged cars. Personally I prefer turbos. Why?
Superchargers get you off the line, up to 3000 rpms or so, a whole lot faster. They make torque. At the cost of noise, gas, and maintenance. Longevity is more of an issue with a SC than a turbo. (IMHO)
Turbochargers require frequent oil changes, and cooldowns, but... they can make incredible gas mileage. There's this "sweet spot" where the turbo is lightly spinning BEFORE boost enrichment kicks in ...
I used to get 31 mpg out of a crappy old Subaru doing 70+mph mph keeping her right in that sweet spot. Didn't have a vacuum gauge but I could feel it.
I could also do 80+ mph headed up a steep mountain pass to the ski area in the same car with that **** floored and the turbo going to town, err, away from town.
The GF's big, heavy BMW X3, twin turbo, accelerates like a rocketship AND gets 22-24 mpg's highway. I'm amazed both at its performance AND gas mileage. (inline six)
In contrast, my supercharged MR-2 was great off the line, around town. The SC took a gutless 4 cylinder motor and made it torquey, at the cost of a lower
redline, maintenance, etc. I actually preferred the gutless NA MR-2 which revved to 7500 and sang like an opera star.
I also like the whine of a turbo. All ya gotta do is change the oil frequently and cool 'em down before shutdown. I've personally
never had to replace one but replacements are cheap (well, except for anything stamped BMW)
My opinions. YMMV.
I've owned both supercharged and turbocharged cars. Personally I prefer turbos. Why?
Superchargers get you off the line, up to 3000 rpms or so, a whole lot faster. They make torque. At the cost of noise, gas, and maintenance. Longevity is more of an issue with a SC than a turbo. (IMHO)
Turbochargers require frequent oil changes, and cooldowns, but... they can make incredible gas mileage. There's this "sweet spot" where the turbo is lightly spinning BEFORE boost enrichment kicks in ...
I used to get 31 mpg out of a crappy old Subaru doing 70+mph mph keeping her right in that sweet spot. Didn't have a vacuum gauge but I could feel it.
I could also do 80+ mph headed up a steep mountain pass to the ski area in the same car with that **** floored and the turbo going to town, err, away from town.
The GF's big, heavy BMW X3, twin turbo, accelerates like a rocketship AND gets 22-24 mpg's highway. I'm amazed both at its performance AND gas mileage. (inline six)
In contrast, my supercharged MR-2 was great off the line, around town. The SC took a gutless 4 cylinder motor and made it torquey, at the cost of a lower
redline, maintenance, etc. I actually preferred the gutless NA MR-2 which revved to 7500 and sang like an opera star.
I also like the whine of a turbo. All ya gotta do is change the oil frequently and cool 'em down before shutdown. I've personally
never had to replace one but replacements are cheap (well, except for anything stamped BMW)
My opinions. YMMV.
Last edited by wadenelson; 12-05-2018 at 09:09 AM.
#7
I'm not a C7 owner. I don't know if a turbocharger upgrade is one of your choices or something you'd consider.
I've owned both supercharged and turbocharged cars. Personally I prefer turbos. Why?
Superchargers get you off the line, up to 3000 rpms or so, a whole lot faster. They make torque. At the cost of noise, gas, and maintenance. Longevity is more of an issue with a SC than a turbo. (IMHO)
I've owned both supercharged and turbocharged cars. Personally I prefer turbos. Why?
Superchargers get you off the line, up to 3000 rpms or so, a whole lot faster. They make torque. At the cost of noise, gas, and maintenance. Longevity is more of an issue with a SC than a turbo. (IMHO)
Turbochargers require frequent oil changes, and cooldowns, but... they can make incredible gas mileage.
There's this "sweet spot" where the turbo is lightly spinning BEFORE boost enrichment kicks in ...
I used to get 31 mpg out of a crappy old Subaru doing 70+mph mph keeping her right in that sweet spot. Didn't have a vacuum gauge but I could feel it.
There's this "sweet spot" where the turbo is lightly spinning BEFORE boost enrichment kicks in ...
I used to get 31 mpg out of a crappy old Subaru doing 70+mph mph keeping her right in that sweet spot. Didn't have a vacuum gauge but I could feel it.
I could also do 80+ mph headed up a steep mountain pass to the ski area in the same car with that **** floored and the turbo going to town, err, away from town.
The GF's big, heavy BMW X3, twin turbo, accelerates like a rocketship AND gets 22-24 mpg's highway. I'm amazed both at its performance AND gas mileage. (inline six)
I also like the whine of a turbo. All ya gotta do is change the oil frequently and cool 'em down before shutdown. I've personally
never had to replace one but replacements are cheap (well, except for anything stamped BMW)
never had to replace one but replacements are cheap (well, except for anything stamped BMW)
Last edited by subieworx; 12-05-2018 at 09:33 AM.
#8
Dig
Member Since: Jan 2006
Location: Port Saint Lucie FLORIDA & HONDURAS
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Around town driving a high power NA car you will lose mpg. Highway driving cruising at low rpm’s you should get the same as stock or close.
Supercharged car around town and highway mpg are almost the same as stock.
Supercharged car around town and highway mpg are almost the same as stock.
#9
Team Owner
Member Since: Jan 2007
Location: cookeville tennessee
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Then got it to someone & went up to 12 in town & 17 ON THE HIGHWAY..
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JetEngineJoel (12-06-2018)
#10
I had a 55 mile commute. I knew what MPGs I was getting to 1/10 mpg, thank you very much.
#12
I came from a Magnuson supercharged C5 and I have been looking into the same setup for my C7. The Magnuson supercharger disengages at light throttle and engages at more throttle.
For everyday driving fun, WOT thrills, mild manners for the GF, and good gas mileage when not getting after it, I do not think there is a better setup than the Eaton Supercharger adapted for the Corvette by Magnuson. I am a bit biased though, I love the low end torque that a PD supercharger gives.
For everyday driving fun, WOT thrills, mild manners for the GF, and good gas mileage when not getting after it, I do not think there is a better setup than the Eaton Supercharger adapted for the Corvette by Magnuson. I am a bit biased though, I love the low end torque that a PD supercharger gives.
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JetEngineJoel (12-06-2018)
#13
Former Vendor
With a blower you will be about the same normal driving under all conditions except while your in boost. A H/C NA setup will use some more around town but highway wont be far off from stock.
We are not too far from you so if you want to talk about the setups give us a call or email. We could get you pricing on both setups.
#14
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Thread Starter
Robert - I agree. It’s amazing how important the skills of the tuner comes into play. Many variables can be tweaked to improve power, but fully understanding how all interact is key to balancing power, efficiency, drivability and longevity.
The Chev - Thanks for the input. Magnuson SC is definitely high on my list. For more street fun I’m looking for the low end grunt of PD blower, but the half of me that wants to occasionally track the car says stay NA.
The Chev - Thanks for the input. Magnuson SC is definitely high on my list. For more street fun I’m looking for the low end grunt of PD blower, but the half of me that wants to occasionally track the car says stay NA.
#15
If you want it to drive like stock I'd recommend going with a supercharger. I make just under 600whp and the car drive exactly as it did stock. The mpg also is like stock until you get into boost.
i also love the sound of a car with a lumpy cam but they tend to shake your fillings out of your head. I went with the Edelbrock E force with Eaton 2300 rotors, they give you a 3 year 36k mile full drive train warranty.
i also love the sound of a car with a lumpy cam but they tend to shake your fillings out of your head. I went with the Edelbrock E force with Eaton 2300 rotors, they give you a 3 year 36k mile full drive train warranty.
OP your car will drive better on a supercharger than NA. the biggest problem with NA will be the annoying idle. The only reason people can tell my car is supercharged around town is the faint whine. If you don't know cars you might think it's just my electric fan is on or something similar.
Last edited by BrunoTheMellow; 12-06-2018 at 12:29 PM.