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2006 Ariel Atom 2
2007 VW Touareg V10I am current running 60's in the back. I don't know what MadMax is running.
I thought that the Rotrex took time to rotate up to RPM, just like early turbo's.
I am current running 60's in the back. I don't know what MadMax is running.
I thought that the Rotrex took time to rotate up to RPM, just like early turbo's.
I think you're confusing turbo lag with a centrifugal supercharger design. Turbo lag describes the phenomenon that when you have a step change (large change over a short period) in engine RPM, there is actually a delay between when the engine reaches the target RPM and when the turbo wheel reaches steady-state speed for that RPM. Because superchargers are belt-driven, they don't have this issue. However, centrifugal pumps in a supercharger application compress much more poorly at low RPM than their dual-lobe or twin-screw counterparts, which leads to lower overall compression at low engine RPMs, which in turn leads to less power and torque at low RPMs. This can create an effect that is a bit like turbo lag, but is fundamentally different. The other lag-inducing bit about a centrifugal charger is that, like a turbo, it must be mounted farther away from the intake valves, especially if you have an air-to-air charge cooler. This increases the time that it takes between spooling up the pump and getting to steady-state pressure at the intake valves.Originally Posted by Norm
300hp K20A | "It'll never go, my dears! Not if he's had anything to do with it."
OK, I did already know some of that. My question was not phrased the best, but, thank you for the informative answer.
You're welcome! I'll see if I can get you spring rates later today.
300hp K20A | "It'll never go, my dears! Not if he's had anything to do with it."
I'm no expert, but it doesn't take any time to spool up. It spools constantly but with different speed. The more the rpm, the more it spools. It is a typical centrifugal in terms of power delivery.
Here is a dyno chart of a 1.6 liter Mazda Miata motor with a Rotrex set up. The Thick Lines are the Rotrex power delivery. The Thin lines are a tuned modded naturally aspirated motor. (see attachement)
And the Second image is a Rotrex Atom at 13psi (low boost) making 216 hp at 4700 rpm and 387hp at the peak.
FUN FUN stuff.
But as Darth and Bolus will tell you... A Turbo will get the job done. A supercharger gets the job done for Norm. I hope to get the job done someday with a Rotrex. =)
"Opportunities do not come to those who wait; they are captured by those who attack."
I'd would have done a rotrex if I could have fit it in the car. but there is no where to put it inside that engine compartment
^^^ This guy would have shoe horned it in there if anyone could have!
Let's power buy a bigger shoehorn! Then we can pass it around and everyone can install those mods they've always wanted.
300hp K20A | "It'll never go, my dears! Not if he's had anything to do with it."
Booo Forced Induction! Yay large displacement!
For $5k I'd get a set of Shinoo's 15x7 and 17x9 setup, a set of A6s, a good revalve, spring change, and cornerweight.
2011 Ariel Atom Not Supercharged
2006 Range Rover Sport Supercharged
Don't forget the strengthened uprights. with 17x9 and 295 rubber in the back, you'll need the extra support.
300hp K20A | "It'll never go, my dears! Not if he's had anything to do with it."
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