Depends on your right foot. When adding boost to any car depending on the size of the injectors, fuel mapping, duty cycle, air temp etc. there are many variables. But think of it as a 4mpg loss in semi spirited driving. Under full load good luck getting double digit numbers. Ironically enough you may even actually increase your mpg post induction if you use turbos.

 

TPC superchargers kits are based on the Eaton M90, roots-type positive
displacement superchargers. The Eaton M90 supercharger produces a power curve similar to that of a modern factory turbocharged engine. The massive mid-range torque provides astounding vehicle acceleration on demand to greatly enhance the driving experience for sport driving. For using a very modest boost level(average 4.5psi), the top end power definitely holds its own compare to other brands of superchargers.

For more info on the Eaton M90 supercharger, please go to this link:

http://www.eaton.com/EatonCom/ProductsServices/PerformanceProducts/Products/Superchargers/index.htm


The piggy-back computer and the secondary fueling in this application is
NOT an afterthought. It would be uneducated to state such a claim that it is an afterthought. This engine management strategy is necessary for the ultra-wide powerband of the Eaton supercharger, which has the
characteristics of a modern factory turbo system. The challenge was to
tune for rapid pressure raising rate, while maintain drivability, emissions, and performance without the use of a Bosch factory turbo ECU.
That is why an external device was used. Some may argue that it is due to manufacturing cost. Well, it is not It cost us more to buy and external
hardware with wiring harness than 6 injectors and an ECU flash.

A centrifugal-type supercharger, such as Vortech, generates a narrower
powerband than an Eaton root-type supercharger. And its pressure raising
rate is more subdue for a given application. This characteristic makes the
centrifugal-type supercharger much easier to tune. A tuner can easily get
away with six injectors, an ECU flash, and then soldering an in-line
resistor into the factory wiring harness.

We are not claiming if one type of supercharger is better than another.
That is for you decide based on your personal needs.

We are not claiming if a piggy-back computer and secondary fueling is a
better engine management strategy than 6 bigger injectors, an ECU flash,
and soldering an in-line resistor to your factory harness. They are what
it takes for a given application to work.

And lastly, we are not claiming if the TPC brand superchargers are better
than other brand(s). It really comes down to your personal preference. We have invested a lot into producing a supercharger kit using superchargers from an OEM supplier and its supporting components. We may not have sold as many as other brand(s) but we make a excellent product. We are here to inform you about our products without prejudice and slandering of other companies and products as we know there is more than one option available.

 

Casey: Thanks for the thorough explanation. Too often, people with a little bit of information make erroneous statements based on invalid assumptions or just lack of proper understanding. Your clarification helps us better understand the technical differences between the available super chargers, and in my case, illustrates how much more complex they are than I appreciated. And I'm a mechanical engineer.

 

I had a supercharger on a Jeep Cherokee years ago that did it the same way,piggy-back computer and extra injector.That thing was a rocket ship!
And YES everyday reliable!
I always wondered "why" people were so quick to judge you on this?!

One word though...I read alot of stuff before buying a charger and I could not find any good(independant) testing done on the TPC.They need videos and dynos...not from the manufacture but rather from individuals!
May stimulate sales!


Stacy

 

Casey,

Thanks for the non-bias info regarding your product.

 

Thanks for the positive feedback everyone and Justatoy, I have been following your install thread, kudos on doing the work yourself. We are all enthusiasts here.

 

Just in case anyone wanted to see or evaluate TPC Dyno sheets I have included them for the 3.4, 3.6 and 3.8 motor.

 

Hi Casey,
Thank you for the detail and non-bias reply. I see many people commenting on TPC sc makes a constant whining noise, any comment ? Thanks !!

 

The Eaton M90 is the biggest supercharger we can possible fit into these
cars. It is a tight fit, but none the less, it fits. The supercharger
should only generate that distinctive "supercharger sound" when it is on
boost. If the noise is present at all times, the supercharger is probably
making small contact with the body of the car. Which will transmit and
amplify the sound. If that is the case, the location of the supercharger
should be adjusted by a 2-3mm. If you wish to further reduce the sound
level, you may install Dyna mat in the engine compartment.

 

Thank you so much for the prompt reply. As I have never heard the TPC sc working in person, only comes from reading in various forum ! Can you please clarify 'SC sound when it is on boost' meaning when the SC is working or at fully throttle ? Thanks.

 

Pretty much any time there is throttle input(under load) a supercharger is "on boost".

Pretty decent Wiki Article for the how one works and the history...

http://en.wikipedia.org/wiki/Supercharger

 

greatly appreciate your reply.

 

Im glad TPC replied because im on the fence with purchasing one and originally thought of VF as the SC to go with, but now that I have read through these post's it seems that TPC is a more powerful SC and comes in much lower in the RPM's. Looks like I still have a LOT of research to do before i make any decisions!!!

 

Good luck and please post a new thread if you decide on the TPC sc, so we can see your feedback ! I already went with the group buy for the VF (will install it end of Feb), but still curious to learn more about TPC.

 

where did you get your group buy from?