Full throttle Electric Supercharger Build Thread

[fenton]

Well the good thing is when I'm in first gear the tires let go first :-)

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[Levi]

Very interesting. Too bad nobody (company OEM or supplier) researched on alternative FI possibilities. I remember AMG did something with a Pressure Wave Supercharger, but the development was not advance enough, so the A 45 AMG ended up with a conventional 2.0 Turbocharged I4 making 360 PS.

@fenton: How does the engine sound at full throttle when the supercharger is spinning? Like a normal supercharged engine or like a turbocharged engine? Does is sound as good as naturally aspirated?

There are rumors the new M3 so as the new WRX will have electric supercharger assissted turbo engines to totally eliminate that well known turbo-lag.

[fenton]

Originally Posted by Levi

Very interesting. Too bad nobody (company OEM or supplier) researched on alternative FI possibilities. I remember AMG did something with a Pressure Wave Supercharger, but the development was not advance enough, so the A 45 AMG ended up with a conventional 2.0 Turbocharged I4 making 360 PS.

@fenton: How does the engine sound at full throttle when the supercharger is spinning? Like a normal supercharged engine or like a turbocharged engine? Does is sound as good as naturally aspirated?

There are rumors the new M3 so as the new WRX will have electric supercharger assissted turbo engines to totally eliminate that well known turbo-lag.

It sounds like the vortech cars... Which is to say they basically sound NA.

You can hear the movement of additional air and you feel the torque.

I'm going to swap in a K and N panel filter that might increase induction noise.



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[mid_life_crisis]

All the posters talking about wanting to tie the electrocharger to the throttle so it is always running and its speed is linked to throttle position are overlooking the discussions about current electrical storage technology. In a few years it may no longer be an issue, but for now the system has to be part time so the batteries have a chance to recharge (which happens surprisingly fast) between full throttle runs. I've driven both manual and automatic versions of the FR-S and under normal, just putting around town type driving, the dreaded torque dip is not an issue. When you get spirited the electrocharger does wonderful things for the power curve, so full time running is not necessary.

[fenton]

Originally Posted by mid_life_crisis

All the posters talking about wanting to tie the electrocharger to the throttle so it is always running and its speed is linked to throttle position are overlooking the discussions about current electrical storage technology. In a few years it may no longer be an issue, but for now the system has to be part time so the batteries have a chance to recharge (which happens surprisingly fast) between full throttle runs. I've driven both manual and automatic versions of the FR-S and under normal, just putting around town type driving, the dreaded torque dip is not an issue. When you get spirited the electrocharger does wonderful things for the power curve, so full time running is not necessary.

This is bang on. The amount of capacity you would need to run full time would outweigh the gains.

The system that we will be testing next week that looks for negative pressure between the charger and throttle body and adds a small amount of boost(raises to atmospheric pressure really) should be a nice stop gap.


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[mid_life_crisis]

The dyno chart we really need is no electrocharger compared to installed electrocharger but not engaged.

[Levi]

Originally Posted by mid_life_crisis

All the posters talking about wanting to tie the electrocharger to the throttle so it is always running and its speed is linked to throttle position are overlooking the discussions about current electrical storage technology. In a few years it may no longer be an issue, but for now the system has to be part time so the batteries have a chance to recharge (which happens surprisingly fast) between full throttle runs. I've driven both manual and automatic versions of the FR-S and under normal, just putting around town type driving, the dreaded torque dip is not an issue. When you get spirited the electrocharger does wonderful things for the power curve, so full time running is not necessary.

It could also be done thanks to brake-energy-regeneration, and this already exists on many cars.

[Lawnik]

@fenton could I get a ride along sometime in the near future? I'm in Calgary often.

Cool project

[fenton]

Originally Posted by mid_life_crisis

The dyno chart we really need is no electrocharger compared to installed electrocharger but not engaged.

I can see where your coming from but that isn't the main point of the system. How many times do you take your car to redline at 80 percent throttle?

I think the most important part is that daily driving isn't affected and when you want the power it is there.

At the top end the compressor will be holding the engine back a bit until it is engaged. That is where the pressure loss system is going to come into play.

Honestly before 4500 rpm you can hardly notice a difference because the engine isn't flowing much and that's where people daily drive if not even lower.

Videos will explain all in the end

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[fenton]

Originally Posted by Lawnik

@fenton could I get a ride along sometime in the near future? I'm in Calgary often.

Cool project

Sure thing I don't mind. Planning on meeting up with Bu-Tang next week sometime as well. His buddy in a s2000 wants to race. I was all for it until he told me has comtech centi supercharger at 7 psi. Haha

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[FT_Monk]

Originally Posted by DylanFRS

Pretty cool, I was definitely skeptical at first but glad to see the results!

BTW, love the haters on the thread for the first half, then dyno results, then silence from the haters.

That just means that the "haters" are not haters at all. They are skeptical but not in denial when proofs are available. Unlike blind believer who always responded to skeptical questions or comments with hissy fit.

I am sure most people wants this to be successful; it is in their interest too. No one in their right mind is going to reject a SC system that is easy to install and has instance boost. There are obstacles to overcome, but this system is a good first step. I think.

[jamesm]

Moore's Law may not apply to batteries, but with all the money getting dumped into that area of research and recent advances, it would be wise to think a bit ahead when developing something that could be finished a few years from now. There are batteries being developed right now with thousands of times the energy density and charge rate.

here is one example.

so the time will come that full-time operation and much higher boost is feasible. until then, it would be cool if you could have a switch like KERS along with the throttle switch

[neutron256]

Originally Posted by mid_life_crisis

All the posters talking about wanting to tie the electrocharger to the throttle so it is always running and its speed is linked to throttle position are overlooking the discussions about current electrical storage technology. In a few years it may no longer be an issue, but for now the system has to be part time so the batteries have a chance to recharge (which happens surprisingly fast) between full throttle runs. I've driven both manual and automatic versions of the FR-S and under normal, just putting around town type driving, the dreaded torque dip is not an issue. When you get spirited the electrocharger does wonderful things for the power curve, so full time running is not necessary.

I don't think many people are saying to tie it into the thottle so its on all the time, but rather so that it can activate at some point before WOT and possibly provide a little more dynamic and progressive control over the motor when it is in use.

[ft_sjo]

Originally Posted by mid_life_crisis

All the posters talking about wanting to tie the electrocharger to the throttle so it is always running and its speed is linked to throttle position are overlooking the discussions about current electrical storage technology. In a few years it may no longer be an issue, but for now the system has to be part time so the batteries have a chance to recharge (which happens surprisingly fast) between full throttle runs. I've driven both manual and automatic versions of the FR-S and under normal, just putting around town type driving, the dreaded torque dip is not an issue. When you get spirited the electrocharger does wonderful things for the power curve, so full time running is not necessary.

You have to remain open-minded. You could always run it at ~14v from the primary starter battery at low boost levels and then switch to the 'power pack' under higher load conditions. Lots of ways to do it.