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Old 05-13-2016, 07:05 AM   #1
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At the risk of sounding like a dumba $$...

What is the difference between the KB supercharger and a Vortech centrifugal other than the obvious (twin screw /centrifugal)? The reason I ask is because I saw on the Cushman website I can get a complete vortech system AND stage 1 blower cams for wayyyy less than KB setup I was planning on buying.

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Old 05-13-2016, 07:27 AM   #2
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Basically the KB is a positive displacement supercharger. Which means it's always providing boost. The centri blower is not positive displacement. It is still making boost but you need higher RPM to make the boost the KB does from the start. That's the absolute basics of it.


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Old 05-13-2016, 07:43 AM   #3
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^ that's a good general explanation. A Centrifugal blower builds boost based off of RPM, my car for example won't make 11lbs until 6200rpm. A Roots/Twin Screw blower build full boost instantly and will hold damn near the same torque all the way through the power band. Personally I prefer the Centrifugal blowers myself due to how the power band feels. But one of the downfalls of them is that because they build boost by rpm they also feel like dogs when trying to mash it in the higher gears.

What sort of driving are you looking at doing?
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Old 05-13-2016, 08:15 AM   #4
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Quote:
Originally Posted by Mile high JDF View Post
^ that's a good general explanation. A Centrifugal blower builds boost based off of RPM, my car for example won't make 11lbs until 6200rpm. A Roots/Twin Screw blower build full boost instantly and will hold damn near the same torque all the way through the power band. Personally I prefer the Centrifugal blowers myself due to how the power band feels. But one of the downfalls of them is that because they build boost by rpm they also feel like dogs when trying to mash it in the higher gears.

What sort of driving are you looking at doing?
Basically just tooling around town, car shows, errands on a nice day. The occasional fart can car at a light. If I can get the same amount of power/torque basically and save some cash. Really just bang for the buck kinda mentality.

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Old 05-13-2016, 08:17 AM   #5
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Is that what you run mile high..a Centrifugal with your dyno sheet?

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Old 05-13-2016, 08:45 AM   #6
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I know that the centrifugal is easier to install
However, with KB power is instant, no waiting for it to build up.
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Old 05-13-2016, 08:45 AM   #7
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Either blower will do what you're looking for. I would suggest trying to go for a ride/drive in cars equipped with each blower if you can, that may help you make a decision. I tend to be biased when it comes to power delivery so don't just go based off my opinions.

Yes I have a Vortech V2 S-trim, but it's gonna come off in favor of a turbo
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Old 05-13-2016, 09:24 AM   #8
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Originally Posted by peter123wallace View Post
I know that the centrifugal is easier to install
However, with KB power is instant, no waiting for it to build up.
That's the thing....no one around here in upstate NY has really either that I have seen at any of the shows. The only people I know that have mustangs, 1 friend of mine has an 05 gt with just bolt ons and a 93 cobra with 18k miles and the original tires, and the other friend has a non pi 98 gt with a spun rod. So your guys opinions really matter.

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---------- Post added at 02:24 PM ---------- Previous post was at 02:24 PM ----------

Quote:
Originally Posted by Mile high JDF View Post
Either blower will do what you're looking for. I would suggest trying to go for a ride/drive in cars equipped with each blower if you can, that may help you make a decision. I tend to be biased when it comes to power delivery so don't just go based off my opinions.

Yes I have a Vortech V2 S-trim, but it's gonna come off in favor of a turbo
Meant to reply to this one ooops.

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Old 05-13-2016, 09:28 AM   #9
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That's the whole set up I would be getting from Cushman.

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Old 05-13-2016, 03:23 PM   #10
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That set up is non-intercooled.

I would definitely spend the extra cash to get an intercooled unit if it were me.


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Old 05-13-2016, 03:33 PM   #11
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Originally Posted by 0440thgt View Post
That set up is non-intercooled.

I would definitely spend the extra cash to get an intercooled unit if it were me.


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That is a charge cooled kit. So no it doesn't have an intercooler, but it does have a cooling system in it.
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Old 05-13-2016, 04:45 PM   #12
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That is a charge cooled kit. So no it doesn't have an intercooler, but it does have a cooling system in it.
I don't think this particular blower comes with the aftercooler/charged air cooler like the picture suggests. In the component breakdown it lists that it does not come with an intercooler.
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Old 05-13-2016, 05:27 PM   #13
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Stock engine can get away without an intercooler, and the Vortech aftercooler is not the greatest thing in the world either... Needs a water tank where the battery goes, heat exhanger is meh... You can save a LOT of money by going with a DIY or CX kit but if you go CX call them and get a kit without the intercooler and get a Treadstone or pay extra to get their bigger intercooler. Also an air to air intercooler is going to be much better for street use.

As far as centri vs PD... PD makes the car feel like a big block, instant torque. It will not make as much peak hp as a centri... but for a stock 2V that can't rev really past 6k safely that's not really an issue. The nice thing about the centri is that you can tool around and the car feels like a stock NA car (and stock gas mileage) but the power is always there when you floor it.

Also if you spend a little more up front you can get something like a T trim or a Novi 2200 with a centri that will grow with you. My older Novi 2000 will make 26 psi at max RPM, I will never have to upgrade my supercharger no matter what I do.
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