Demo: 2.slow electric supercharger

[Geobmx4life]

Re: Demo: 2.slow electric supercharger

Ya, the one I saw was on demand, but I'm sure you could program the timing of it...would be time consuming to figure it out and have it fire just before the turbo spool...if I'm on the same page as you Sean.
BTW, MechEngg..I sent you a PM.

[shconer]

Re: Demo: 2.slow electric supercharger

I think the biggest problem is that after the turbo was spooled up the supercharger would become a restriction so you would need some sort of bypass.

[MechEngg]

Re: Demo: 2.slow electric supercharger

It wouldn't be a restriction if we could use a VFD on it and crank the speed up to match the airflow of the K03s. Which is why i would like some specs on the compressor and motor and maybe with a few switches it could work.

[shconer]

Re: Demo: 2.slow electric supercharger

Maybe I am wrong but assuming that the motor is already running at its maximum speed when it is on. So if its running at maximum speed and its not able to produce the same amount of boost as the factory turbocharger then it will start to become a restriction as boost rises past what the supercharger is capable of. I data logged it at Race City and I can tell you that its maximum flow was 104 g/s @ 5920RPM on the 2.0L. I t sounds like they have made some changes and now it might flow more.

[MechEngg]

Re: Demo: 2.slow electric supercharger

If that is the case then you might be able to install a "flapper valve" on the line betwee the SC and regular turbo that is boost pressure controlled so that when you hit X boost it opens the flapper and let's extra air in that way. I'm just trying to brainstorm right now. And its been done before with a regular SC and regular turbo so I don't see why I couldn't make it work here with a SC and biiiig turbo so that you don't have such a big turbo lag

[shconer]

Re: Demo: 2.slow electric supercharger

Yea that would work, like an adjustable waste gate, and have a pressure switch that turns the supercharger off. 1.8T Twincharger.

[MechEngg]

Re: Demo: 2.slow electric supercharger

Yup kinda like the R32 exhaust flappers that open when you get over a certain RPM. They just have a vacuum tube input and that can be wired into a pressure switch that is run to a relay to the control box of the SC motor. The mechanical setup would be super easy to do for this but would most likely require custom tuning to get everything right. And it would be most effective on BIG turbos such as GT35 and larger on a 1.8L engine. Would be very efficient for auto-x i think just like lancia did in their delta s4.

Ummm OP please develop a product like we have been discussing so that i don't have to

[shconer]

Re: Demo: 2.slow electric supercharger

You wouldn't even need a flap as the air is going to take the path of least resistance. Use a waste gate to bypass the supercharger and set the waste gate to start opening at like 5 psi and and have the supercharger turn off at like 6 psi. I think cost could be a prohibiting factor for this set up.

[MechEngg]

Re: Demo: 2.slow electric supercharger

Using a wastegate is not going to work very well. The way a wastegate works is that is lets EXCESS pressure through so if you set it at 5psi you would be losing a constant 5psi going to your turbo. Basically when your SC is feeding 6psi to the turbo the turbo will be recieving 6psi. Then you shut off the SC the pressure the turbo recieves is only going to be 1 psi because it takes 5psi to open the wastegate. This would work if you could set the wastegate to 0.1psi and just lose that much but then you may not have a very good seal when the SC kicks in until it gets pressured up, i would rather design a mechanical system to make it work all the time and not have to rely on the air pressure to keep it shut/open.

[shconer]

Re: Demo: 2.slow electric supercharger

If the supercharger is supplying its maximum flow to the inlet of the turbocharger before it has spooled and the supercharger is capable of 4 psi then there will be 4 psi between the two and probably a little less between the turbo and the intake. But once there is enough exhaust flow to begin to spool the turbocharger and the turbocharger starts flowing more than the supercharger can deliver the 4 psi of boost on the inlet side of the turbocharger will dissipate and vacuum will be created between the supercharger and turbocharger. Once the manifold pressure exceeds the maximum pressure of the supercharge a waste gate set at this pressure would relive the vacuum being generated by the restricting supercharger. The pressure switch would disable the supercharger because at that point it would just be a waste. It is no different than the pressure dropping as the engine speed increases on the 2.0L.

[MechEngg]

Re: Demo: 2.slow electric supercharger

Nvm got what you are saying. I still think it will be a restriction and you will lose at least a few psi because of it however. I am talking to a custom tuning guy from the US to see if he thinks that this is even possible.

[Gamman]

Re: Demo: 2.slow electric supercharger

Holy. You guys are on a way nother playing field than me. This is why we have made the DIY kit. We never thought that this would have been the first out of the gate.

To answer most of above (going off memory). Yes, motor is super efficient, but it still needs a battery. 4psi is a lot to ask of those little motors. Battery and charger is like a re-fillable nitrous system. The tank is about 3-5 minutes. Depends on temps, etc. It recharges at a 10:1 ratio. 1 second off run time needs 10 seconds to recharge.

No intercooler required as it hardly heats air. 4psi is not that much(again see chart). We have to stay within stock fuel system for the intro system.

We agree that if you could make that engine less laggy, this ccould help. However, we are busy trying to fit it onto stock vehicles, going from n/a to our s/c. I have to check to see what has changed. I don't think its much on the mechanical side, so those numbers should be close. Check that one sheet we have on the tech section with the charts. It is accurate, unlike most else on that site (still under development).

Thanks guys.

[Gamman]

Re: Demo: 2.slow electric supercharger

Guys: some more details on using this as an anti-lag device.


FTSS-4 is capable of flowing up to 325-350 cfm with positive pressure (0-0.5 psi). The 1.8t @ 10psi & 6000 rpm moves approx 300 cfm.*
Version 1: *Install the supercharger between the MAF and the turbo. *Micro *switch to activate @ WOT. *At partial throttle air will easily flow through the supercharger without restriction, at full throttle the supercharger will instantly raise pressure to the turbo inlet. *The turbo essential gets a higher atmosphere, say 3 psi + atmos (13 psi in Calgary) = 16 psi. *
Version 2: Same install location, but with a bypass flap, tee'd in and located from the inlet of the supercharger to the outlet of the supercharger, it needs to be at least 2 1/2" diameter tubing. *Same WOT micro switch on the throttle and an addition switch/ lever that is tripped by the wastegate. *Scenario: full throttle applied, supercharger activates and positive pressure closes flapper valve, wastegate opens (when full turbo boost is reached) and disables supercharger, flapper valve will open because of vacuum. All this would happen in less than 2 seconds and remove lag.

A similar setup was done on a 250 HP legacy turbo. *Launch from a standstill was dramatically improved. *The car had an automatic transmission and during driving at speed the downshifts insured quick boosting of the turbo at WOT. *A manual car would greatly gain from this set up.

[sabbySC]

Re: Demo: 2.slow electric supercharger

On a 1.8t you could use a hobs switch to shut the unit off once you build boost. I don't see much need for a device like this personally, but if someone wants to try it the results could be interesting. My gut feeling is that it will limit flow as a restriction in the intake path once the turbo starts spooling.

[MechEngg]

Re: Demo: 2.slow electric supercharger

Sabby see scenario 2, AKA a bypass to get around this as a flow restriction