Full throttle Electric Supercharger Build Thread

[Yruyur]

Wonder how ecutek flat foot shifting would work since you keep wot between all your shifts.

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[nonicname]

Fenton,
can you take a picture of the battery box opened to see the 3 batteries?
Also, is the battery dying after a few runs? if so how many and how long is the wait before is good to go again?

[nonicname]

Originally Posted by SkullWorks

I can't believe i just subscribed to this thread...i hate myself for wanting to see the dyno...

why? because you think this is the ebay crap?

[fenton]

Originally Posted by nonicname

Fenton,
can you take a picture of the battery box opened to see the 3 batteries?
Also, is the battery dying after a few runs? if so how many and how long is the wait before is good to go again?

I certainly can tomorrow. Honestly I drive my car very hard and I haven't been able to drain it. Wot 1 to 4th and they are still boosting. You let off for a minute and they are right back up to 28.5(max volts).

If you do a blast in 2nd and 3rd it takes maybe 15 to 20 seconds before they are at full.... Btw it still works when they are not at full. In fact I can't really tell a difference no matter what the voltage says.

I took about 8 people for a test drive today and never even came close to running out of boost. If you are holding it down doing 200+ I could see them dying maybe but it's just impossible to drain them in the city. Hth

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[fenton]

Originally Posted by Yruyur

Wonder how ecutek flat foot shifting would work since you keep wot between all your shifts.

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Good idea I will have to try this because when you shift gears the motor does start slowing down. Fast shifts you don't really notice anything though

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[fenton]

When I get the go pro this weekend I will take vids showing the battery power as I drive on and off boost.

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[Fast_Freddy]

Originally Posted by Calum

Yes, of course it would.

No way in hell you'd need a tune for this. The boost is way too low to require a tune, although you would probably gain more with a tune. About as much as you would gain from a stock NA tune.

[ft_sjo]

So what happens when you quickly shut the throttle? Is there a brake employed to stop the turbo? Or does compressor surge happen?

[Fast_Freddy]

Compressor surge concerns at ~2psi? Good one...

[ft_sjo]

Originally Posted by Fast_Freddy

Compressor surge concerns at ~2psi? Good one...

I think you're dreaming of a different kind of surge than I am.

[Fast_Freddy]

Originally Posted by fenton

If the VR6 Golf they did is any indication we should see at least 30whp up top with 50 to 60tq down low. The VR6 was also on the smaller compressor.

We will probably end up tuning it for safety more than anything else. All the maf is seeing is extra air, if the resolution of the maf is high enough things should be okay. Now the timing may be out at the higher maf levels at which point a tune can bring those down.

If the car isnt happy with the higher load and air coming in it has compensations built in but you dont want to always rely on compensations.

All the cars they have done up to now have not been tuned.

So this little 12V supercharger is going to add at least 30whp to a 2.0L boxer 4 cyl at 7400 with +50-60wtq below the curve? LOL!!!

What does a MAF read other than air volume? WTF are these "compensations" you refer to?

[Fast_Freddy]

Originally Posted by ft_sjo

I think you're dreaming of a different kind of surge than I am.

Okay, what different kind of closed throttle compressor surge are you talking about?

[mad_sb]

Originally Posted by Fast_Freddy

No way in hell you'd need a tune for this. The boost is way too low to require a tune, although you would probably gain more with a tune. About as much as you would gain from a stock NA tune.

Tunes are not always about gaining power. Sometimes they are about keeping the motor together. Have you seen the stock rom? Do you know what the load caps are, do you know what that is and what happens when you exceed them? Do you know what the load axis on the fuel and timing maps cap out at in stock form.... I'm guess the answer is no to most of these questions based your assertion about not needing a tune.

In the end it may not need a tune to be safe, at the current boost level anyway, but i based on my experience with the stock rom, I think it will.

[atledreier]

Originally Posted by Fast_Freddy

Okay, what different kind of closed throttle compressor surge are you talking about?

Pretty sure you are talking about compressor stalling which is VERY different from surging.