Full throttle Electric Supercharger Build Thread

[Gary in NJ]

Originally Posted by Luckrider

What battery setup (2 or 4 batteries) are you using and how much boost/torque are you shooting for?

The additional 2 batteries do not provide extra boost, but they do extend the duration of boost. Think of it this way; voltage determines the speed at which compressor spins and amperage determines how long it can spin. The controller is limited to a set margin above 24VDC.

Originally Posted by Luckrider

The HP gains are a bit unrealistic, but lets be honest, 100% more torque should be possible with a good set of headers since that is right in the torque dip.

The NA unmodified engines make ~110 to 120 foot pounds in the area we refer to as the torque dip. The highest value we've seen to date is Sojhinn's car at about 200 ft/lbs on E85. His car made about 115 ft/lbs in the dip. This is an increase of 74%. I would be surprised (pleasantly so) to see 230 ft/lbs.

BTW, for our car it's a Header, not Headers.

[jpit]

Rob said he was picking up an additional 1/2 psi boost throughout the range with the additional batteries. I have noticed an increase but hard to quantify how much. I'm sure it put me over the elusive 200 hp mark. I was at 196 before and I have been able to drop by 0-60 times by about .3 seconds.

[Luckrider]

Originally Posted by Gary in NJ

The additional 2 batteries do not provide extra boost, but they do extend the duration of boost. Think of it this way; voltage determines the speed at which compressor spins and amperage determines how long it can spin. The controller is limited to a set margin above 24VDC.



The NA unmodified engines make ~110 to 120 foot pounds in the area we refer to as the torque dip. The highest value we've seen to date is Sojhinn's car at about 200 ft/lbs on E85. His car made about 115 ft/lbs in the dip. This is an increase of 74%. I would be surprised (pleasantly so) to see 230 ft/lbs.

BTW, for our car it's a Header, not Headers.

Meh, it isn't an inline motor so header or headers would qualify (since they come together even if they are one piece when finished). I realize that the words I am spewing more wishful than anything, but hey, we need to make the tq250 and tq300 have meaningful names

As far as the batteries having no impact on boost, it is correct in an ideal world, but in real applications, the compressor would be able to spin faster under load. This is because the higher Amperage can overcome more of the kinetic resistance from the load being applied to the motors. This is all assuming a decent efficiency (slip).

[fenton]

Originally Posted by Gary in NJ

The additional 2 batteries do not provide extra boost, but they do extend the duration of boost. Think of it this way; voltage determines the speed at which compressor spins and amperage determines how long it can spin. The controller is limited to a set margin above 24VDC.



The NA unmodified engines make ~110 to 120 foot pounds in the area we refer to as the torque dip. The highest value we've seen to date is Sojhinn's car at about 200 ft/lbs on E85. His car made about 115 ft/lbs in the dip. This is an increase of 74%. I would be surprised (pleasantly so) to see 230 ft/lbs.

BTW, for our car it's a Header, not Headers.

Additional batteries do supply a small amount more boost because the charger has a larger source to draw from and doesnt droop as much on hitting it per say. Just adding the small additional battery let me hold about 5 more HP up top on the dyno.

Sent from my HTC One using Tapatalk

[silent runner]

Originally Posted by radroach

This thread is useless without video!

You guys are such tough critics. Look I'm crappy a posting videos, let alone making them. Here is my first silly, shy little attempt. It actually chirped without boost, which it almost never does. First dig, no boost second, power ON:

I actually layed off the throttle, for a second in the second launch because it was freaking me out a bit, as to how hard it was spinning.

[Sojhinn]

Originally Posted by silent runner

You guys are such tough critics. Look I'm crappy a posting videos, let alone making them. Here is my first silly, shy little attempt. It actually chirped without boost, which it almost never does. First dig, no boost second, power ON:

I actually layed off the throttle, for a second in the second launch because it was freaking me out a bit, as to how hard it was spinning.

Holy crap that was hilarious to see that car do that. Auto or manual?

[silent runner]

That's a 4spd. automatic, Camry LE-V-6, loaded with every extra Lexus ES-300, option I can stuff into the car, and the battery pack loaded into the front end as well. We have a little testing to do yet, but yes it is quite hillarious to see such an innocent looking little old car do such nasty things.

[Sojhinn]

Originally Posted by silent runner

That's a 4spd. automatic, Camry LE-V-6, loaded with every extra Lexus ES-300, option I can stuff into the car, and the battery pack loaded into the front end as well. We have a little testing to do yet, but yes it is quite hillarious to see such an innocent looking little old car do such nasty things.

More impressive it was automatic. Nicely done. My friend the auto shop teacher wants to stuff a phantom into an old school odyssey. Should be fun to see a mini van do burn outs .

[silent runner]

Originally Posted by Sojhinn

More impressive it was automatic. Nicely done. My friend the auto shop teacher wants to stuff a phantom into an old school odyssey. Should be fun to see a mini van do burn outs .

Maybe they should make upgrading the brakes to bigger discs, added twin piston calipers, whiteline sway bars, 17X8, OZ wheels, tires, shocks, and springs, as I have mostly done as well as part of the project! Sometimes an innocent looking little Camry, can have some teeth. - It looks very sweet and innocent on its winter tires.

But thats enough from another project, back to the FRS/BRZ and what it can do for my summer car!

[mid_life_crisis]

Think about that for a second. How many functional FI systems have you ever heard of that could be swapped back and forth between your two seasonal cars without it being any kind of a fuss?

[Sojhinn]

Originally Posted by mid_life_crisis

Think about that for a second. How many functional FI systems have you ever heard of that could be swapped back and forth between your two seasonal cars without it being any kind of a fuss?

I know. This is pretty damn incredible. Rob you have out done yourself.

[bee_are_zee]

How is the boost limiting going to work for cars without a tune I remember it being mentioned earlier. For example setup on brz with tune getting full potential in summer, then swap over to the winter car without any tune.


Sent from my iPhone using Tapatalk

[fenton]

Originally Posted by bee_are_zee

How is the boost limiting going to work for cars without a tune I remember it being mentioned earlier. For example setup on brz with tune getting full potential in summer, then swap over to the winter car without any tune.


Sent from my iPhone using Tapatalk

Well once you get a tune you are good either way, car works fine in winter with the tune.

For those that are waiting or don't want to get a tune I believe rob is working on two options. One is a hardware sensor (I have it on my car currently set to 3psi).... this sensor looks for a peak pressure and doesn't let the compressor exceed it. This sensor connects and works in tandem with the drag reduction sensor.

The other option that i believe he is looking at is a limiter in the firmware of the controller that controls the motor.... this one is going to take some time if it is possible at all.

[Gary in NJ]

Originally Posted by fenton

Well once you get a tune you are good either way, car works fine in winter with the tune.

For those that are waiting or don't want to get a tune I believe rob is working on two options. One is a hardware sensor (I have it on my car currently set to 3psi).... this sensor looks for a peak pressure and doesn't let the compressor exceed it. This sensor connects and works in tandem with the drag reduction sensor.

The other option that i believe he is looking at is a limiter in the firmware of the controller that controls the motor.... this one is going to take some time if it is possible at all.

My tune is based a standard NA tune, however when the ECU senses boost it moves to maps that Mike developed specifically for the ESC. So if I were to remove my ESC and ask for full throttle my ESC will continue to provide the correct AFR mixture and timing.