Centrifugal or Root style for my stock 2011 ss LS3

[steema]

My car is stock beside a cold air intake and Flowmasters. It is a 6 speed and my mostly everyday driver. I have gone back and forth on this for a few years but I finally got the funds and I need help. I like the powered ban on the root style but worry about traction problems and the power ban for the centrifugal sounds like fun only on the highway. I want the instant power but I also want the pull on the highway. I was thinking of a procharger d1-sc stage 2 with meth but now a roots style is what a dyno shop says would be better for street and it generates less heat. If you have had this dilemma and did make a choice and have 2 cents i would to happy to hear it. Thanks in advance.

[Bo White]

My car had a Paxton on it for 2 years of its life. Made 682rwhp on 12psi. Car pulled hard up top but you had to keep the revs up since it only had 2.5psi at 2500rpm. My wife's Terminator has basic bolt ons and upper and lower pulleys with the ported stock blower. Her car has 500ish rwhp and its slower than my car for sure. Her car however was more fun to drive because of the instant 17psi of boost lol.

[Vegas Bound]

A friend is running high 9s with a Procharger, cam, headers, etc on SBE, stock trans, stock suspension. Roots creates too much heat. If I had it to do over again, I would have gone twins or Procharger.
My roots eats him in 1/8 but he is pulling hard on the big end.
Additionally, if your shop said roots creates less heat, find another shop. They are wrong.

[POWERFREAK]

Personally, I like centri with a manual trans. They are easier on the drivetrain and traction is easier. I had an ecs paxton and didn't regret it, the power was certainly there. If you think it needs more low end, you could always swap out the rear gears for 3.73 or 3.90's.

[gtstorey]

What do you mean by street? If driving curvy back roads, the low end torque of a roots style is the way I went.

[RupertPupkin]

Centri—- FTW

[eLeSthree]

I would agree with Vegas on the heat subject. A centri would generate the least amount of heat compared to a roots or turbo(s).

You cant go wrong with a D1sc or X.

[Greenhornet2]

This really has to do with personal preference. I love the instant torque of a PD (roots). There is more of a power band feel to a centri as the boost starts off lower and climbs so it feels much different. I do not like the sound of a centri most are very noisey and sound like a damn jet. I like the whine of a PD (tho my whipple is quiet). Easier to make more power out of a centri if you are racing. PD is tougher on parts with the insta-torque. I would do my PD over again for my uses, if I were drag racing all the time I probably would have gone TT for max effort.

[Yellow 1]

Rootes style blower whine for the win. Gospel. Amen.

[racesloth]

I am happy with my Vortech YSi. It is nice not being in boost for easy around town driving (2200rpm and below) but when the boost hits... whoo yah! Also my coolant temps are 178-185 in town in 95deg heat....

[RupertPupkin]

Oh and when you hear the jet engine at WOT with the centri, then it goes PSSSSHHHHHHH bc of the BOV.... intoxicating.. lol.

[Bo White]

I've yet to be in a PD, Centri or Turbo car that you couldnt cruise around in without going into boost. That's all vacuum dependent.

[Sparko]

The best way I think you can make this decision is to take a look at how you run through the gears. If you mostly stay lower in the RPM band then a roots seems more appropriate. If you're banging against red line frequently then centri is more appropriate. That's the overly simplistic break down.

On the issue of heat, roots do produce a significant amount of heat but it is entirely manageable. I have used phenolic material as spacers between the blower and manifold which helped with heat soak, and a good fmic to cool your water for your manifold IC also greatly helps with IAT temps. For a centri, heat soak isn't so much the issue as is heat from the compression. This is managed by smart piping and a good air-to-air fmic (typically, not exclusively).

Having driven both daily, I am partial to the roots as a daily. I like way power is applied with a roots, and the sound is consuming. I cant wait until I have the funds to add a roots blower to this car.

[go_go_gadget88]

I am personally torn on this as well. I knew from the minute I drove this car, it was gonna get some boost one day...but here I am years later, still cant decide which route I'd even want to go. Leaning towards centri for a few reasons - less stress on parts, more room to grow, and will play nicely with the NA cam I have in there.

However, the instant torque of the roots would likely be a ton of fun, especially since mine is basically just street car that will hit the track on occasion. In the end, it may just come down to what I end up finding the best deal on when it's time to pull the trigger. I don't think either is a horrible choice!