Full throttle Electric Supercharger Build Thread

[fenton]

Originally Posted by Thatruth2001

This is one of the specific reasons (future development) I decided to start the process of upgrading to a full 3" exhaust system.

Do you think the stock system is starting to become a restriction? Also is this a system that is best suited for people who have completes exhaust upgrades?

It is absolutely a restriction above 7000 rpm because unbolting the axel back causes the power to maintain >200whp from 6400 to 7800 (no drastic drop off).

Mine with stock starts to tail off after peak whp at 6750.

[Sojhinn]

Originally Posted by fenton

It is absolutely a restriction above 7000 rpm because unbolting the axel back causes the power to maintain >200whp from 6400 to 7800 (no drastic drop off).

Mine with stock starts to tail off after peak whp at 6750.

Wait... you unbolted the axleback at the dyno? So it's only the muffler causing the restriction?

[fenton]

Originally Posted by Sojhinn

Wait... you unbolted the axleback at the dyno? So it only the muffler causing the restriction?

Yes. This is the one we did last month on the dyno jet untuned. This was running pig rich with the axelback disconnected.

Toma's dyno reads a full 10 HP less than this dynojet. Based on that our dynojet number is maybe ~217hp now and we fixed that horrible dip (at 3000-4250 rpm) down low that we had when we were untuned.

See below dyno from last month with 4 5kw compressor UNTUNED with muffler delete. After tuning yesterday that dip is gone and we now have a nice HUMP to >190 wtq



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[Sojhinn]

Originally Posted by fenton

Yes. This is the one we did last month on the dyno jet untuned. This was running pig rich with the axelback disconnected.

Toma's dyno reads a full 10 HP less than this dynojet. Based on that our dynojet number is maybe ~217hp now and we fixed that horrible dip (at 3000-4250 rpm) down low that we had when we were untuned.

See below dyno from last month with 4 5kw compressor UNTUNED with muffler delete. After tuning yesterday that dip is gone and we now have a nice HUMP to >190 wtq

Sent from my HTC One using Tapatalk

Interesting... I always thought the muffler was pretty free flowing. At least thats what nameless said. BTW- Did you ask toma about my question?

[fenton]

Tune is unlocked.... For sure with brzedit, not 100 percent sure if you use a different program...he wasn't sure either.

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[Sojhinn]

Originally Posted by fenton

Tune is unlocked.... For sure with brzedit, not 100 percent sure if you use a different program...he wasn't sure either.

Sent from my HTC One using Tapatalk

The OFT can use BRZedit tunes. So we are good. Thanks bro!

[Robftss]

Originally Posted by Sojhinn

What did Rob say about the whole situation?

I'm not a tuner, Turbo guys are pressurizing 6-10 psi @ low rpms.

I was pleased to see the boost gains with the upgrades, once the engine accepts the increase with some more tuning from us and other testers....it will be spectacular.

Thanks Toma & Fenton.

[fenton]

Originally Posted by Sojhinn

Interesting... I always thought the muffler was pretty free flowing. At least thats what nameless said. BTW- Did you ask toma about my question?

Free flowing when you don't have boost and are below 200 whp, yes i agree.

Once over 200whp it appears it becomes a restriction on the very top end.

[fenton]

After looking back at all the data i just wish we had more time on the dyno.... Ill ask @Robftss for a port back exhaust for Christmas..... lol jk jk :P

[Robftss]

Originally Posted by SloS14

So, what's the deal with variable boost? It would be awesome if this thing had it's own MAP sensor and was able to take a signal (or voltage) to try and reach/maintain a target pressure.

That way, someone could come along with necessary ECU code to send that info along to the ESC controller.

Nobody needs 10psi at 800rpm

How about 8psi @ 1800 rpm?

[fenton]

Originally Posted by bfrank1972

Wait, what am I looking at here? Am I seeing > 8psi at 6000 rpm? Can't be...

That is when installed before a positive displacement supercharger on a different engine.

Blue is just the PD supercharger, green and red are when the person added the ECS before the supercharger.

As you can see when using the larger blower the pressure ratio stack nicely!

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[bfrank1972]

Originally Posted by fenton

That is when installed before a positive displacement supercharger on a different engine.

Blue is just the PD supercharger, green and red are when the person added the ECS before the supercharger.

As you can see when using the larger blower the pressure ratio stack nicely!

\

Haha I realized that and just deleted my post once I realized it was moot - had me on the edge of my chair for a minute

[Bu-Tang]

I would really also question the mid pipe, that second CAT I would say is more of the cause than the over pipe. I actually just sold my SRT HB exhuast and will be stock for the winter, then next year I will order likely the Motive over and mid pipe (Catless) and remain with the stock catback for a while.

[Sojhinn]

Originally Posted by Bu-Tang

I would really also question the mid pipe, that second CAT I would say is more of the cause than the over pipe. I actually just sold my SRT HB exhuast and will be stock for the winter, then next year I will order likely the Motive over and mid pipe (Catless) and remain with the stock catback for a while.

I have a catless mid pipe so I'm interested in knowing what would happen.