PD Supercharger vs Centrifugal

[evo8904]

Correct me if I am wrong but wont the PD blower only really make a difference if you are starting from a dead stop? I have limited experience with PD blower cars but mine is Centri and from what I have seen if I am already rolling around 10 mph or better and stomp it, it kicks down-rpms go up and off I go.

Yup, you will have instant torque with a PD. The only cars that I have prior to my mustang were 4 cyl turbos. I can't express how much I enjoy the instant power. I even floored it in 5th with my father n law in my car. He was completely surprised by how much power it has. But, PD SC will be harder on your drivetrain.

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[BlackGT]

As much as like the idea of the instant torque, my reasons for going with the centri were the impact on the drivetrain and the fact that my wife drives the car on occasion. Her driving skills are, well, less than confidence inspiring and I wanted a little forgiveness before the power really kicked in.

 

[Roh92cp]

Correct me if I am wrong but wont the PD blower only really make a difference if you are starting from a dead stop? I have limited experience with PD blower cars but mine is Centri and from what I have seen if I am already rolling around 10 mph or better and stomp it, it kicks down-rpms go up and off I go.

Right with an auto the centi or turbo lag will have less affect becuase of the auto ability to down shift quickly at whatever rpm your at. However with a manual you could get caught with your pants down so to speak with a centi/turbo. You would need to drop down a gear or 2 to attain the instant boost and torque a twin screw can make.

Imagine centi and a twin screw both running 10 psi with a stock 5.0 manual. Both cars running side by side same gear say 4th at 2500rpm and both floored it the twin screw would be gone. This is only an example of the difference in how and where they make power, and of course a gear change could affect the outcome. But by always having a really fat torque curve at a low rpm with a PD/twin screw its makes you have to shift less to get into the power curve. That my friend is really fun in a street car.

 

[mustang_guy]

Centri or turbo.

 

[Whipple SC]

As much as like the idea of the instant torque, my reasons for going with the centri were the impact on the drivetrain and the fact that my wife drives the car on occasion. Her driving skills are, well, less than confidence inspiring and I wanted a little forgiveness before the power really kicked in.

But what if you could have that with just a simple key stroke on your laptop? Then have full PD power when you want it? Best of both worlds is what I say.

 

[BlackGT]

what would be the ultimate would be a clutch set up on the blower pulley much like an A/C compressor to have it on or off at the flip of a switch!

 

[BlackGT]

Right with an auto the centi or turbo lag will have less affect becuase of the auto ability to down shift quickly at whatever rpm your at. However with a manual you could get caught with your pants down so to speak with a centi/turbo. You would need to drop down a gear or 2 to attain the instant boost and torque a twin screw can make.

Imagine centi and a twin screw both running 10 psi with a stock 5.0 manual. Both cars running side by side same gear say 4th at 2500rpm and both floored it the twin screw would be gone. This is only an example of the difference in how and where they make power, and of course a gear change could affect the outcome. But by always having a really fat torque curve at a low rpm with a PD/twin screw its makes you have to shift less to get into the power curve. That my friend is really fun in a street car.

I completely understand what you are saying and completely agree and is the reason I felt like it was a better choice for me to go with the centri because of my wife's driving style. She tends to get road rage. It would be kinda like putting a gun in her hand with a hair trigger. She needs the little extra squeeze before it goes bang.

 

[Roh92cp]

I completely understand what you are saying and completely agree and is the reason I felt like it was a better choice for me to go with the centri because of my wife's driving style. She tends to get road rage. It would be kinda like putting a gun in her hand with a hair trigger. She needs the little extra squeeze before it goes bang.

I got yah but really the modulation of the pedal is the same, it's not a rocket ship with an on off trigger. If she can drive a Honda Civic one day then drive a Mustang GT the next without flying off the roads then she can go from a GT to a PD blown GT as well. The point I'm making is the power is still very controllable.

 

[caustin69]

what would be the ultimate would be a clutch set up on the blower pulley much like an A/C compressor to have it on or off at the flip of a switch!

or maybe a electronic controlled bypass valve???

 

[Kbreese]

PD's like Whipples sound awesome and all, and I know there's a big fan club here, but I see so many talking about traction problems, even after putting steamrollers out back (albeit, street tires).

As others have said, I think PD's would be a lot of fun in regular every-day driving, where you will be able to shoot forward very fast at part throttle, and I'm sure that feels fantastic and makes the car feel very powerful and responsive.

But the flip side is going all out most are going to have serious traction issues on the street. Which means if it's an actual race instead of just toying around, you may lose due to a lack of traction.

 

[mustang_guy]

Pd blowers take a lot of work to get them to hook on the street even with full on slicks. Even at the drag strip most owners struggle with a dead hooking set up. It can be done but its usually only the pros like watson or shops with long time experience doing it. Kelly at bmr seems to be doing well at the track with his pd. That isnt the norm from what ive seen over the years though. Thats just the con of having instant full power. I like pd blowers. They just take more work to hook than i find worth it. Ill stick with turbos or centri.

People need to find what fits their goals the best. There will be comprising with pd, centri or turbo. All are great fun. There is no wrong choice if it fits your needs.

 

[Roh92cp]

PD's like Whipples sound awesome and all, and I know there's a big fan club here, but I see so many talking about traction problems, even after putting steamrollers out back (albeit, street tires).

As others have said, I think PD's would be a lot of fun in regular every-day driving, where you will be able to shoot forward very fast at part throttle, and I'm sure that feels fantastic and makes the car feel very powerful and responsive.

But the flip side is going all out most are going to have serious traction issues on the street. Which means if it's an actual race instead of just toying around, you may lose due to a lack of traction.

With the Whipple and whipple cal there is torque management and the whipple doesn't hit as hard as the TVS. Most guys with this setup running 10-11 psi with some DR say in warm weather they hook in second on the street.

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