Full throttle Electric Supercharger Build Thread

[Wild Weasel]

Originally Posted by fenton

I think the small one would probably throw a code as well and would probably cause you to lose power above 7000rpm.

That's pretty much exactly what I'd expect as well.

Originally Posted by fenton

Not to mention being smaller it would be a constant restriction while off boost in comparison to the larger compressor.

Not so much this. Air flows through the compressor wheel fairly easily so I still don't think you'd feel any change in the engine response. If you look straight down into the compressor housing, it all looks pretty sealed up, but in reality there's a fair bit of space around the blades of the wheel. It IS overall more narrow, but again... you're cutting off air with the throttle plate anyway.

I know I've already gone down this road... and to be fair, if we were talking about a V8 consuming huge amounts of air and the small blower was the same size then you'd certainly have an issue... but it just isn't in this case. The engine is getting all the air you want it to... until it's isn't.

[mid_life_crisis]

Keeping in mind that if two different sized compressors are reading the same boost pressure, the smaller one is actually moving less air, is there any possibility at all that the smaller unit would not throw a code? Is it worth testing?
Not concerned about losing boost at high rpms, as long as we don't get to a point where the electrocharger is actually choking the system at high rpms.

[Robftss]

Hey WW!

I'll add:

The TB point just before the WOT switch activation has some restriction. In all my test cars thus far the N/A torque had lots of overhead for this small reduction not to be an issue. The 4.3L has gobs of TQ all by it self, so does WW's M45 2.4L, the FA20 does not.
We are going to try the partial spool /restore to near atmos transducer on Fenton's car. With the AC 'on' and 4 people the N/A torque is all used up. We'll get Fenton's feedback on this.

But yes, at no point will you every have 'less' power, cause it is ready.

[mid_life_crisis]

Originally Posted by Robftss

With the AC 'on' and 4 people the N/A torque is all used up.

"4 people"?!? LOL Have you ever seen this car's back seat?

[Robftss]

Originally Posted by mid_life_crisis

"4 people"?!? LOL Have you ever seen this car's back seat?

OK, 2 people, golf clubs, and a couple flats of beer.


If you want less boost across the rpm range, using a lesser 24V battery will provide what you are looking for.

[fenton]

Originally Posted by mid_life_crisis

"4 people"?!? LOL Have you ever seen this car's back seat?

They were girls so they are flexible. It was about 32 out yesterday and i had the trunk loaded up with suitcases.

With the AC on it was slow, but the damn car is slow anyways before i got this thing. I just found myself pushing the throttle until the SC came on. And because there were 3 girls chit chatting i didnt want to rudely interrupt them with BOOOOST haha.

After they got out it was AC off windows down and full throttle fun.

[fenton]

Originally Posted by nonicname

Fenton have you been able to run out of battery power yet?

No I havent, i have tried my best, i just cant do it on the street. Race track yes, i could probably cause it to shut off. Problem is every time you let off the throttle it starts charging back up.

I noticed that after doing 4 x 0-140km/h that it was taking longer to get to "full" 28.5v

It still pulls hard and works fine from anywhere in the 27's.

You cant really see the Volt readout in the night vids but you can see in the day ones, it just shots back up.

[nonicname]

Originally Posted by fenton

Problem is every time you let off the throttle it starts charging back up.

wouldn't call that a problem

[TouchMyHonda]

idk what to think about this.

[Toma]

Originally Posted by TouchMyHonda

idk what to think about this.

I'm honestly thinking best bang for the buck mod for the BRZ FRS.

I mean all that other stuff you spend more on (tune, exhaust, cold air), does next to nothing but costs more.

This costs less, and destroys them. Hell, this killed the Vortech in terms of low end torque, and looking at the AVO turbo Auto maps, matches them.

And, it literally goes to stock in 5 minutes, maybe 15 if you go back to stock battery and remove the controller etc. Hell, dealer woudn't even know what he was looking at if he saw the batteries and controller, he would think it some stereo stuff lol.

Obviously this runs quite well on the stock tune. Fenton has been bagging the crap out of this thing with no issues except the CEL light for ""MAP sensor high" if he punches it at 3000. But the CEL has no affect on performance (we dyno tested it with the code present and cleared).

We will "tune it" this week and see what happens. I'll be using BRZ Edit, but will keep a change log for anyone that wants it for their Ecu Tek tuner.

[Wild Weasel]

Originally Posted by Robftss

If you want less boost across the rpm range, using a lesser 24V battery will provide what you are looking for.

Unless I'm mistaken, my impression is that they only want to limit the boost at the lower RPM's. It's been fine past 3k or so, right?

Getting an RPM reading should be fairly easy. If you can get the controller to limit the motor speed to 80% or something and ramp up to 100% at 2500 or 3000 or something, that would probably do the trick.

Hell, if you could put a little knob on it to control it, that would be awesome. I mean... there's lots of talk here about the altitude you guys are dealing with so it stands to reason that if Fenton is getting too much boost at low RPM's, someone nearer to sea level might get WAY too much boost. And hey... EVERYONE likes little knobs and switches, right?

[mid_life_crisis]

If it didn't need the damned tune, it would be perfect. As is, it is very close.
Simple install - check.
Affordability - check.
Sufficient power gain - check.
Driveability - check.
No codes - miss.

Four out of five and the fifth can be fixed if you don't mind a tuning solution.

[HunterGreene]

Originally Posted by mid_life_crisis

If it didn't need the damned tune, it would be perfect. As is, it is very close.
Simple install - check.
Affordability - check.
Sufficient power gain - check.
Driveability - check.
No codes - miss.

Four out of five and the fifth can be fixed if you don't mind a tuning solution.

Not being an expert, I think its safe to say that any worthwhile FI will require a tune of some sort.

[Wild Weasel]

Originally Posted by HunterGreene

Not being an expert, I think its safe to say that any worthwhile FI will require a tune of some sort.

Absolutely. It's only a shame that this kit is SO CLOSE to not needing one that it's a bit sad. It's not that big a deal, but the difference between someone getting this stuff in the mail, spending an hour installing it, and going out for some fun and that same person having to get it tuned first is a tiny bit of a damper.

Of course, from the sounds of it, they can go out and have their fun right away and get the tune done at their earliest convenience with no ill effects... so still a win, right?