Supercharger Install
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Joined: Jun 2014
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From: Atlanta
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Do you have any dyno charts for the S/C setup you have on there now? Curious to see what the low-mid range torque looks like.
I drove a Vortech Supercharged VR6 and it was a DOG. Most likely b/c the setup wasn't sized right... which is why I'm curious about yours (properly sized).
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Joined: Aug 2007
Posts: 1,364
From: Hawaii
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Unfortunately, I don't have dyno charts for the S/C. I have yet to find a Dyno operator that I trust. Instead, I would use Durametric testing of A/F to make sure the car is running safely with the modifications that I made. I also ran my cars against various other cars to see if there are any improvements.
I can tell you that with the original VF Kit with the 3.8" pulley, it's faster than a stock 997.1 C2S (355HP), 997.2 C2S (385HP), and can keep up with a stock 996TT. With a 3.6" pulley, it's faster than a stock 996TT, and kept up with a 997.1TT (480HP one). With the 3.4 pulley I am running now, I was surprised that it kept up with a 360 Modena.
I can tell you that with the original VF Kit with the 3.8" pulley, it's faster than a stock 997.1 C2S (355HP), 997.2 C2S (385HP), and can keep up with a stock 996TT. With a 3.6" pulley, it's faster than a stock 996TT, and kept up with a 997.1TT (480HP one). With the 3.4 pulley I am running now, I was surprised that it kept up with a 360 Modena.
italdream - no engine light worries. yeah, if you can make the stretch a 997TT is probably a better car. may have to really search for the right prices for the SC.
Marco - my car feels doggish at the lower rpms. i took 808c2s advice and ordered a LWFW hopefully that helps.
808c2s - tell me more about this pulley!
Marco - my car feels doggish at the lower rpms. i took 808c2s advice and ordered a LWFW hopefully that helps.
808c2s - tell me more about this pulley!
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Joined: Sep 2007
Posts: 172
From: boston
Rep Power: 25
I had less issues with the supercharger kit than with the turbo. Took a While to work the bugs out. The supercharger felt like the same power curve with more power, turbo has a lot more low end torque. I also own a 997TT, feels better than both!
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Joined: Aug 2007
Posts: 1,364
From: Hawaii
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Marco,
My power range does not become evident until 3000. It pretty much mimics a stock 997S power curve, but more of it and pulls until rev limiter kicks in. With the LWFW, the car is just more responsive due to the quicker rev to get to the power range.
My power range does not become evident until 3000. It pretty much mimics a stock 997S power curve, but more of it and pulls until rev limiter kicks in. With the LWFW, the car is just more responsive due to the quicker rev to get to the power range.
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Joined: Aug 2007
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From: Hawaii
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You can run this pulley, but you have to make sure your A/F is ok. With this pulley, you will also need to increase your fuel flow, as well as, get a smaller serpentine belt, obviously.
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Joined: Aug 2007
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From: Hawaii
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I believe there's no SC Kit for a DFI engine, yet. Not PDK. Correct me if I am wrong.
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Joined: Jun 2014
Posts: 64
From: Atlanta
Rep Power: 14
Marco - my car feels doggish at the lower rpms. i took 808c2s advice and ordered a LWFW hopefully that helps.
I believe there's no SC Kit for a DFI engine, yet. Not PDK. Correct me if I am wrong.
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Joined: Sep 2007
Posts: 172
From: boston
Rep Power: 25
that is what enthusiasts are for! To feed each other ideas and inspiration for the next project .The idea of a 4.0L S/C is tempting. I am currently running a smaller pulley and a different resistor on the VF-Engineering S/C with the stock 3.8L for a while now, and thus far, the engine has been holding up rather well. I suspect the current tune should do ok with the 4.0L upgrade....I hope
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Joined: Nov 2009
Posts: 40
From: new york
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I disagree with all the "turbo" people.
It doesn't matter what "power adder" you add to a normally aspirated car. Every time you bump the HP higher than stock, you'll always put extra wear and tear on parts. When tuned right, both Superchargers & TurboChargers provide good power gains.
Centrifugal supercharger like the VF will always be at a disadvantage b/c they're essentially a turbo cold side bolted to a belt drive. It's very difficult to get the right impeller speed / mass flow combination which is why I've found most centrifugal type SC's to lack the low end grunt you get from a roots type blower.
Turbos on the other hand, while often build more power, introduce a lot more complexity and heat into the system... making them inherently less reliable and more hassle from a maintenance perspective.
Given the tight quarters of the 911 engine bay and the desire to keep heat levels as low as possible, I think the SC is a fantastic option for these cars... especially if people are seeing mid 400 HP numbers at the wheels.
Everyone has their own opinions, tastes, and wallets. But IMHO, I'd take a SC 911 with a solid tune over an aftermarket turbo setup any day.
It doesn't matter what "power adder" you add to a normally aspirated car. Every time you bump the HP higher than stock, you'll always put extra wear and tear on parts. When tuned right, both Superchargers & TurboChargers provide good power gains.
Centrifugal supercharger like the VF will always be at a disadvantage b/c they're essentially a turbo cold side bolted to a belt drive. It's very difficult to get the right impeller speed / mass flow combination which is why I've found most centrifugal type SC's to lack the low end grunt you get from a roots type blower.
Turbos on the other hand, while often build more power, introduce a lot more complexity and heat into the system... making them inherently less reliable and more hassle from a maintenance perspective.
Given the tight quarters of the 911 engine bay and the desire to keep heat levels as low as possible, I think the SC is a fantastic option for these cars... especially if people are seeing mid 400 HP numbers at the wheels.
Everyone has their own opinions, tastes, and wallets. But IMHO, I'd take a SC 911 with a solid tune over an aftermarket turbo setup any day.
Totally agree with what was said. I am toying with the idea myself
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Joined: Jul 2013
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From: Federal Way, WA
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Trying to get my shop, a 6speed sponsor, to do a build thread. Hope they can do it.
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Joined: Aug 2007
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From: Hawaii
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Sorry to hear about your IMS failure, but this misfortune is allowing you to do a 4.0L upgrade! Looking forward to your build!
I spoke with Stephen from LN regarding the upgrade, and he does not recommend a 4.0L for F/I, unless you accept the possible consequences. He does recommend going with a 3.8L if you have F/I in mind. I am still planning on the 4.0L upgrade, but need to do more research. Are you planning to get a custom tune from VF?
I spoke with Stephen from LN regarding the upgrade, and he does not recommend a 4.0L for F/I, unless you accept the possible consequences. He does recommend going with a 3.8L if you have F/I in mind. I am still planning on the 4.0L upgrade, but need to do more research. Are you planning to get a custom tune from VF?
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Joined: Jul 2013
Posts: 57
From: Federal Way, WA
Rep Power: 23
Sorry to hear about your IMS failure, but this misfortune is allowing you to do a 4.0L upgrade! Looking forward to your build!
I spoke with Stephen from LN regarding the upgrade, and he does not recommend a 4.0L for F/I, unless you accept the possible consequences. He does recommend going with a 3.8L if you have F/I in mind. I am still planning on the 4.0L upgrade, but need to do more research. Are you planning to get a custom tune from VF?
I spoke with Stephen from LN regarding the upgrade, and he does not recommend a 4.0L for F/I, unless you accept the possible consequences. He does recommend going with a 3.8L if you have F/I in mind. I am still planning on the 4.0L upgrade, but need to do more research. Are you planning to get a custom tune from VF?
Plus, the car is a sunny day weekend driver, usually with the wife acting as a "governor" on my spirited driving efforts.
