Quote:
Originally Posted by Drsagacity
 my comments throughout speak for themselves. I am not guessing. 2 Prochargers, 1 Vortech, 2 twin turbos (including my current daily driver), and 1 magnuson. I specifically called out the BS argument about traction and lag...
1.I assume that you realize the difference between roots and twin screw, even though you are using the term interchangeably?
2. Please check the fast list, twin screw guys are not adding a higher stall converter, but every centri blower on the fast list will, because it helps them jump into the peak power of the centri blower.
3. You can look at the power curves from any centri car, including your Procharger. If a pd blower has 100rwtq more torque from the jump, then someone who is used to the Pd, will perceive the build in boost as lag. It’s just how they work, a centri builds boost with rpm. A Pd blower runs full boost throughout.
- that being said, if you read the thread, you will also see that I called the lag argument BS because when you add a converter to the Centri, it jumps to a higher rpm range where the torque curve is higher...making the power instant.
Again, I was only playing with OP. I said the LT4 blower was an excellent choice...I also advised that all of the blowers were excellent choices and finding the tuner you want to use and following their recommendation was the way to go. So, thank you for calling me out, but next time, please read the thread before doing so, thanks.
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Fair enough, maybe I jumped the gun on it. I'm sorry about that. I took it as you slamming the advice all the commenters gave the OP that were not pro roots style, which I did not feel was very fair.
1. I do know the difference, the meshing lobes are what make up the difference (twin screws meshing together with a screw which takes less power to turn, internal compression style, vs roots that uses two three lobe meshing agents, more like a pump,) compared to an impeller on the procharger/vortech. I was more less comparing the positive dispacement idea vs the centrifugal idea.
2. I haven't looked at that list, I started to track my results there and just lost touch with the site. I'm going by the builds I have done, and what my friends at the track are running. They can't get fast times with a stock converter, were the pro charged guys can. The only T.C's I have put in no the jobs I have done are with the PD guys. That is just my personal experience in my part of the world. I think lethal switched to a PD, has slower times and needs a converter now? I've lost touch with his stuff as well though so that may have changed.
3. You are right in the PD has all of it's torque in the 2k range, and the centrifugal does not. You are not right about the boost though. You get all of your boost right away, it just builds torque/HP much like a turbo. Lag is when the turbo is spooling up so you have 0 or very low boost, this does not happen with a Centrifugal, you have a lot of power and all of the boost, you only actually build 1 or 2 psi in the RPM range. I started with PD supercharged cars because I thought that was the best there ever was, when I switched to the vortech, I never felt lag, in fact it went from having all the torque (which feels awesome on the seat dyno) right away and that torque being steady then falling off at high rpm, to switching over with the centrifugal and it puts me in my seat and as I build RPM it pulls harder and harder on you and never stops.. it's constantly putting you in the seat more and more as you build rpm. It's an awesome feeling and easy to put on the ground. Yes street tires still scream for their mommy, but you can make it work (at least I could) easier, and I was able to post better times in my 60' and my total 1/8 and 1/4 with my centrifugal powered cars.
I agree 100% with you, the tuner makes a huge difference. All of these will net you in the stock Camaro, with the entry size blowers about 140-150hp gain. How it brings the HP and TQ on will change with each unit and the manner of the car on the road will change. The tuner will make the difference in dialing those parts in and getting the most out of them.