[SCOTT57RT]

My buddy is looking into a supercharger for his 6.4. He and I were debating the best one for his engine which is completely stock. I was telling him that I thought a centrifugal type would be safer for his engine for typical driving around town. Being a 6.4, I don't think he's got as much margin as smaller engines. My main concern was around part-throttle boost and the potential for a screw type supercharger giving more air when not in open loop control mode. Of course, the centrifugal type has the same risk, but you need to be at higher RPM, so it's harder to get there when you aren't slamming the throttle. I'd be interested in other opinions and experiences on the best supercharger for a stock 6.4??

 

[Hemihackman]

I see your point. I like my Procharger. I think when discussing 6.4s - tune is the most important thing.

 

[punisher69]

I'm absolutely in love with my Procharger. In town, it's like a normal (albeit noisier thanks to the BOV) 426... mild mannered, easy to keep out of boost. However, when I mash it, it becomes a completely different animal.

Sent from my moto z4 using Tapatalk

 

[UpInSmoke]

Love my Whipple on my 6.4 & keeping the boost low with a good tune I didnt run into any issues but from my understanding the procharger is a little easier on the stock setup

 

[SCOTT57RT]

Love my Whipple on my 6.4 & keeping the boost low with a good tune I didnt run into any issues but from my understanding the procharger is a little easier on the stock setup

How does the Whipple kick into boost when driving around town? I think that one is a beast, for sure. Do you ever have any situations where the boost kicks in and you're not at full throttle? Do you think you're ever getting too lean?

How much boost are you running? 6psi?

 

[netnathan]

Yes....I like twin screws...but I hear they have a little too much of a "light Switch" effect because of a short RPM band to build power.
Centrifugal blowers are a little more forgiving with making power over a wider RPM band..

 

[UpInSmoke]

How does the Whipple kick into boost when driving around town? I think that one is a beast, for sure. Do you ever have any situations where the boost kicks in and you're not at full throttle? Do you think you're ever getting too lean?

How much boost are you running? 6psi?

Was around 7#s. Never ran into the "light switch" event I've read about with the Whipples. Car ran great all over

 

[DBL.DWN]

What’s Theend goal? Centrifugal can be more forgiving on the street bc was he wya power comes on. Roots or screw is more “on demand power”.
Drivability real comes down to the tuner/tune.
Nearly all “roots/screw” blowers have a bypass valve built in so in vacuum operation it bypasses the blower and not build boost.


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[SCOTT57RT]

What's Theend goal? Centrifugal can be more forgiving on the street bc was he wya power comes on. Roots or screw is more "on demand power".
Drivability real comes down to the tuner/tune.
Nearly all "roots/screw" blowers have a bypass valve built in so in vacuum operation it bypasses the blower and not build boost.

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My buddy's goal was to add some good power to his 6.4 for the street with as low risk as possible.

2007 Charger R/T, Supercharged

 

[DBL.DWN]

Well turbo would be ideal bc its much easier to control power levels. However, packaging becomes an issue. Centrifugal would be next for "safest". but theres tons of "root/screw" blowers on the road. If he wants low rpm power. Then "screw" blower is where its at. Issue will be the high cylinder pressures at low rpm power. With the 6.4, it may not be ideal to have such pressures at low rpm.

 

[91DakBuilder]

Honestly no boost on a 6.4 without forged slugged. The top ring lands are just too narrow. If you and your buddy are dead set on going with boost. A centrifugal or turbo is the safest route. But like everyone has me Antiono’s it can be done with a screw setup as well


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[wink]

I keep hearing that centrifugals don't have instant boost. I'm on my 3rd centri now and that has not been my experience. But as has been stated, it's mostly in the tuning. A proper tune will also solve any partial throttle issues. BTW, centris have bypass valves too. I've got two monsters on the new build. Either type will provide loads of fun, just depends on what you prefer in drivability. But they'll both be limited on a stock engine. My tech has installed a few of the newer Whipples and they wind out further than the older ones before falling on their face. That was my main gripe about screw/roots type blowers. Seems, at least Whipple, has solved that issue. Not sure about the newer TVS based units.

wink

 

[fumanchu182]

Centrifugal will always be more efficient but will have lag depending on your setup.
Screw style will always be making boost, it is a positive displacement supercharger, will fall flat though after fifth gear.

 

[gapi]

If you want stealth, no blower whine, Edlebrock EForce.

 

[SCOTT57RT]

I just saw this thread pop up like a blast from the past. I thought it was relevant for this thread in case anyone searches in the future.

BROKEN PISTONS at 7 PSI

 

[6.4L of Daytona]

I just put down a deposit on a Whipple Stage 2 kit for my 6.4, which will be installed and dyno-tuned by National Speed in Richmond VA. They have had a lot of success (620-640 whp) and longevity with this formula without needing to start messing with the motor. After doing some research and consulting with NS, I also decided to add some long tube headers to take some stress off the engine.


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[MtnRT]

Just curious how your Whipple / Long Tube Header build at NS went?