PD Supercharger vs Centrifugal

[v8ter]

Can someone explain what the same cars, would acomplish with a PD supercharger vs Centri?

Lets say how does 10psi on 91octanes work on a Pd vs a Centri?

Whats the difference when going to the track ?

Wich would give me a better Et with same conditions on a higher altitude,6500' and hotter outside temperatures with a limited 91octanes usage? Considering using a Manual transmission

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[beefcake]

similar power will result in similar results

we have some great packages on the roush or the vortech / paxton / procharger kits

let me know if we can help in any way

 

[Whipple SC]

Can someone explain what the same cars, would acomplish with a PD supercharger vs Centri?

Lets say how does 10psi on 91octanes work on a Pd vs a Centri?

Whats the difference when going to the track ?

Wich would give me a better Et with same conditions on a higher altitude,6500' and hotter outside temperatures with a limited 91octanes usage? Considering using a Manual transmission

Gonna be roughly the same at drag strip. Biggest difference is on the street and daily driving. 2 different schools of thought, unless you have been in both it would be hard to tell you which one fits your needs the best.

 

[v8ter]

Well I had a 08 mustang gt, with bolt ons,longtubes, cams and a Paxton 2200 with 538rwhp, and I want something much more powerfull than that, and the centri feels like you have same power then it kicks in in the high rpm but with an automatic that fine for me,but on a manual I like that instant power of the PD, but I would like to know which one would be more efficient maxing it out at 91octanes?

 

[sonic]

Well I had a 08 mustang gt, with bolt ons,longtubes, cams and a Paxton 2200 with 538rwhp, and I want something much more powerfull than that, and the centri feels like you have same power then it kicks in in the high rpm but with an automatic that fine for me,but on a manual I like that instant power of the PD, but I would like to know which one would be more efficient maxing it out at 91octanes?

The Whipple is your answer then

 

[FATHERFORD]

The biggest thing I liked about my centri units was they seem to not heat soak as much as the twin screws/roots.

I also liked them a lot on the street as it seemed to be slightly easier to feather the car out of the hole on regular street tires.

Twin screws are more fun to drive like a 16 year old, and if you had good sticky rubber on the back would beat most centri cars.

 

[SmokedSS]

My vote is go Whipple, drives better than stock as DD and great on gas and with a few suspension mods pretty good traction considering. Then hit it and at about 1/4 throttle on it comes alive and pulls like a freight train. Its crazy fun for a street car.

 

[beefcake]

Well I had a 08 mustang gt, with bolt ons,longtubes, cams and a Paxton 2200 with 538rwhp, and I want something much more powerfull than that, and the centri feels like you have same power then it kicks in in the high rpm but with an automatic that fine for me,but on a manual I like that instant power of the PD, but I would like to know which one would be more efficient maxing it out at 91octanes?

boost is linear and goes up with rpm with a centri, makes the boost much more controllable

with the pd, boost is pretty much flat across the board.

really comes down to how you drive, if you want more controllable, centri works well

if you want to go stoplight to stoplight at half throttle and notice is more, then, the pd is more suited

both will perform great at the track

The biggest thing I liked about my centri units was they seem to not heat soak as much as the twin screws/roots.

I also liked them a lot on the street as it seemed to be slightly easier to feather the car out of the hole on regular street tires.

Twin screws are more fun to drive like a 16 year old, and if you had good sticky rubber on the back would beat most centri cars.

the air to air on the paxton or procharger stage 2 are very nice 900+ and do work very well.

boost is more controllable.

et wise, both are going to be very similar at similar power levesl

 

[Roh92cp]

The biggest thing I liked about my centri units was they seem to not heat soak as much as the twin screws/roots.

I also liked them a lot on the street as it seemed to be slightly easier to feather the car out of the hole on regular street tires.

Twin screws are more fun to drive like a 16 year old, and if you had good sticky rubber on the back would beat most centri cars.

What twin screw kits are you basing this heat soak issue on. I know the older Kenne Bell kits for the fox Mustangs were not intercooled and they were heat monsters, and the early mod motors had small heat exchangers and no fans, but all the new twin screw kits today come with large heat exchangers and dual fans to keep them cool, they are much better and can't be compared to the past twin screw kits. Centi's may not develop as much heat being mounted off the engine and being they are not compressing all the time like a twin screw, but many centi are sold without any intercooling so they like to keep these kits at 8 psi making mid 500 rwh.

 

[FATHERFORD]

What twin screw kits are you basing this heat soak issue on. I know the older Kenne Bell kits for the fox Mustangs were not intercooled and they were heat monsters, and the early mod motors had small heat exchangers and no fans, but all the new twin screw kits today come with large heat exchangers and dual fans to keep them cool, they are much better and can't be compared to the past twin screw kits. Centi's may not develop as much heat being mounted off the engine and being they are not compressing all the time like a twin screw, but many centi are sold without any intercooling so they like to keep these kits at 8 psi making mid 500 rwh.

"Not as much". I have an 04 F-150 that is pretty mild, makes 500rwhp. Did both on my vortech kit and on my twin scew setup. Both I had upgraded air to water heat exchangers on them.

With the Vortech, I could almost hot lap the truck and it ran the same time over and over. The twinscrew I just have to let it cool down some to run the same time. It still ran good, but there is no way I could hot lap it.

On that truck, the twinscrew is faster. That has more to do with my stall wasn't big enough IMO for the Vortech. The extra low end torque helped pull the truck out of the hole better.

 

[Roh92cp]

"Not as much". I have an 04 F-150 that is pretty mild, makes 500rwhp. Did both on my vortech kit and on my twin scew setup. Both I had upgraded air to water heat exchangers on them.

With the Vortech, I could almost hot lap the truck and it ran the same time over and over. The twinscrew I just have to let it cool down some to run the same time. It still ran good, but there is no way I could hot lap it.

On that truck, the twinscrew is faster. That has more to do with my stall wasn't big enough IMO for the Vortech. The extra low end torque helped pull the truck out of the hole better.

What twin screw did you run on your truck and did the heat exchanger have dual fans?

 

[FATHERFORD]

What twin screw did you run on your truck and did the heat exchanger have dual fans?

Saleen setup on 13lbs. I ran an aftermarket duel exchange, no fans. Used the same one for both blowers. I also had my truck rigged up that my aftermarket engine fans/pump ran even with the key off via a switch.

I had some massive flowing fans, they would suck a towel to the grill, which the exchanger was right in front of.

It's just nature of the blowers, they do heat soak more and faster.

 

[Obsessed]

This is what pushed me to pd vs centri.

http://kennebell.net/KBWebsite/Common/pdfs/acceleration-vs-boost.pdf

 

[Kellys69z]

Pd instant torque centrifugal progressive power.

 

[BlackGT]

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.

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