Compound E Turbos

AlexLTDLX

AlexLTDLX

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Ok - so I presume some of you saw that I've ordered a (still) bigger ESC - this is literally the 4th ESC I've bought for this e boost nonsense (6th, if you count the two I bought for the little Audi turbo - about $3,500 worth of ESCs). My current ESC, after a once-over from APD to make sure it's healthy, along with the current TP Power motor and a Speedmaster P2 head unit will become the "small" e turbo; the Vortech/Steve Neu motor/big ESC will be the "big" e turbo.

Here's a great article on compound turbo charging and it's benefits (additive boost - a weakness of our e turbos):
www.garrettmotion.com

Turbo Tech: Compound Turbo Systems

Compound turbo systems use different size turbos and operate in series where the first turbo feeds the second turbo boosted air and the effect is compounded
www.garrettmotion.com www.garrettmotion.com

I should still be able to get data with the LTO/Vortech/TP Power/APD UHV-20 esc in the next month or so barring no other issues (hopefully at least a drag test; but it'll definitely hit the dyno too).

Thoughts?
 
I've just dream of something crazy. make my car hybrid with the E-supercharger and 2 electric motor in the back 🥴 since I am limited in the power I can go with my motor. I dream of a 4 wd ! kind a small set up in my dream but work like crazy 🤔
 
Lol - I don't think we'll get to 4 bar boost anytime soon. The biggest downside of e turbos is the low boost. If I'm understanding correctly, it's simply additive. So if the big turbo makes 10 psi and the little one makes 5, you see 15 psi - in other words, about 1 bar.

The electric motor in addition to the turbo is a good idea - traction is an issue at elevated power levels.
 
AlexLTDLX said:
Lol - I don't think we'll get to 4 bar boost anytime soon. The biggest downside of e turbos is the low boost. If I'm understanding correctly, it's simply additive. So if the big turbo makes 10 psi and the little one makes 5, you see 15 psi - in other words, about 1 bar.

The electric motor in addition to the turbo is a good idea - traction is an issue at elevated power levels.
Click to expand...
i was obviously exaggerating but but if you hook up 2 or 3 turbos one behind the other (forgot the term: compounded?) it's not 10psi+5psi. Its substantially more because of the compaounding effect. for example, it memory serves me correctly, the torqamp at .6 bar added a second one behind it and they were getting close to 1.8 bar of boost.
@AlexLTDLX since you are going for high boost, this might be a better solution for you to begin with as it'll really ease the load of your electrics.

From Garrett's site: "In compound turbo systems, the turbochargers are different sizes and operate in series, meaning the first turbo feeds the second turbo boosted air and the effect is compounded"
www.garrettmotion.com

Turbo Tech: Compound Turbo Systems

Compound turbo systems use different size turbos and operate in series where the first turbo feeds the second turbo boosted air and the effect is compounded
www.garrettmotion.com www.garrettmotion.com
 
I really don't know what we'll end up with. I'm very interested to find out though. Who did the torqamp compounding thing? Was it Cleetus Mcfarland? I'd like to (re-) watch that.
 
Why not compound just the drive side of the e-turbo? Surely the p2 is capable of generating the boost levels so, double the drive side: twice the batteries, motor, etc. At least you wouldn't have the weight & expense penalty of another sc
 
Pretty sure Cleetus used a Y pipe and two Torqamp blowers for their Cobalt setup but they did experiment with compounding. Not sure that worked out though. I think they had issues with that setup. Don’t make me watch that all over again 😂
 
Problem is, we're hitting the limits of the compressor. A compound setup (not what cleetus tried) would allow more boost. It's probably worth testing down the road.
 
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