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Posted by: JimN73 Nov 3 2014, 01:44 PM

Seems like a good idea, wonder why it took so long.

https://autos.yahoo.com/news/electric-turbochargers-forecast-boom-gas-mileage-gains-150005366.html

Posted by: SirAndy Nov 3 2014, 02:02 PM

So, has anyone ever tried to use the exhaust gas pressure to run an alternator?

It seems like an obvious choice to generate electricity ...

Posted by: Steve Snyder Nov 3 2014, 03:11 PM

I think those "electric turbochargers" were mentioned in Pano recently (it may have been elsewhere, but whatever)... with the added note that they require 48 volts.

Posted by: madmax914 Nov 3 2014, 03:20 PM

But exhaust is a byproduct of a running car and does not steal any horsepower.

Posted by: Spoke Nov 3 2014, 04:07 PM

I believe this is one of the energy harvesting devices on the 2014 F1 "power unit"

Posted by: stugray Nov 3 2014, 05:07 PM

This is an interesting read:

http://www.heat2power.net/en__benchmark.php

And anything anyone ever wanted to know about electric "superchargers":
http://www.ft86club.com/forums/showthread.php?t=39719

http://www.ft86club.com/forums/showthread.php?t=41148

Posted by: damesandhotrods Nov 3 2014, 05:38 PM

But they do indeed cost horsepower, they create back pressure.

Nothings for free in this world, if you spin the turbo with an electric motor you’re going to need a bigger alternator, which is more drag on the crankshaft. This is why people that modify engines for a living use dynos to see where the gains and losses are. And without a turbine spinning the drive, I believe you are left with a supercharger…

Posted by: Cap'n Krusty Nov 3 2014, 06:33 PM

Technically, a "turbocharger" is properly called an "exhaust gas-driven supercharger". Other types are commonly called "belt-driven superchargers". A turbocharger can only be legitimately called such if it is a turbine which is driven by exhaust gases. The product in the article is properly called an "electric supercharger", not a turbocharger. In reality, nearly all that crap commonly defined by the term "turbo" fails to meet the test. Ya know, things like your deodorant, your electric toothbrush, or that scam to boost the speed of your computer software.

The Cap'n

Posted by: barrym Nov 3 2014, 10:07 PM

turbo (exhaust gas driven turbine) steals horse power as it makes its harder for the piston to push exhaust gas out the head rather than it freely flowing out the head ...

Posted by: mbseto Nov 4 2014, 01:56 PM

It's not a new idea, it's a new requirement. Government keeps increasing MPG standards, new widgets are added to meet them.

Posted by: Hank914 Nov 4 2014, 02:06 PM

I have always wondered why there isn't a easy, simple, and cheap turbo option for these VW/Porsche engines. There are hundreds of thousands of engines sold from the 1960s to the 1980s, so you'd think there'd be a market. Miata has bolt on turbos for for relatively cheap HP increases. Why not us?

Posted by: rdauenhauer Nov 4 2014, 03:00 PM

Easy...Plumbing & Heat.

Posted by: Dave_Darling Nov 5 2014, 12:28 AM

"Everybody knows you can't turbo a 914 engine!"

(Sorry, inside joke!)

--DD

Posted by: Woody Nov 5 2014, 07:22 AM

Just get one of these and be done with it. If you're running dual webers should buy 4.

http://www.ebay.com/itm/like/321547048878?lpid=82

Posted by: Johnart May 20 2015, 10:13 AM

Yes...Turbos use some horsepower (back pressure), but the idea is to gain more than you use....IF you only want normal aspiration (barometric pressure to fill your cylinder) you will be limited by altitude (mountain driving) hot humid days, possible engine life issue from over-boost and heat, etc......little extra BOOST will help engine efficiency.....but there are always costs.....It is up to you, what cost you are willing to pay.

It is all fun for the adventurous

Posted by: sean_v8_914 May 20 2015, 10:19 AM

https://www.youtube.com/watch?v=rLDgQg6bq7o
your welcome

Posted by: moorepower May 20 2015, 10:42 AM

From what I have seen the electric motor was used for spooling up the turbocharger only. A turbocharger recovers wasted energy, "heat" to create H.P. They consume very little power at most lower boost levels, as the exhaust is doing downstream, with or without the turbo. I read about this being developed for OTR diesels a few years ago.

Posted by: yeahmag May 20 2015, 10:50 AM

The work has come along a bit.


https://www.youtube.com/watch?v=v=2fjcJp_Nwvk


...and then Chrysler picket it up.


https://www.youtube.com/watch?v=UyRllRWfLJE

Posted by: get off my lawn May 21 2015, 12:27 PM

Ya caint turbo a 914. (yeah, dave beat me to it)

and iffn you think the exhaust to run a turbo is free, shove a 'tater up yer exhaust pipe and drive around the block.

As fer an electric turbocharger, it's a good thing batteries are really light ..........