neanicu

Also,I'd like to hear your thoughts about where you think that Porsche could integrate the motor and batteries on the 911 platform without completely sacrifice usability...

rosenbergendo

Electric driven turbo is your answer. No lag at all. None.

Petevb

Hmm. Not sure, but I'd be tempted to look at a front mounted motor driving the front axle, expanding the space that already exists for 4wd. That'd free up the shaft tunnel for a battery pack low and near the CG.

At the rear there are a few options: You could up-size the alternator, create an integrated starter motor/ drive motor at the transmission, or run an exhaust fed turbine generator/ electric turbo. All of this stuff can probably be pretty small, because I wouldn't expect it to be terribly powerful.

The Koenigsegg One:1 motor's very good, nearly 2x the McLaren- 3 hp per pound on race gas, probably more like 2.5 hp/ lb on pump gas. It's big, which helps quite a bit with power to weight.

dp35

Fascinating topic, which I've been daydreaming about a lot lately. Very interesting that turbo engines aren't lighter than similar HP NA's, something I did not know.

I'm surprised that the BMW i8 hasn't been mentioned. It has both boost and battery, with lots of CF to help offset the battery weight. If the i8 had a more lively ICE, such as a 10,000 RPM I4, it would really be special IMO (I prefer the sound of high revving I4 bike engines).

I have an electric Ford Focus. I leased it for commuting in HOV lanes, and have been pleasantly surprised. While flogging it in the rain today, I was thinking how cool it would be to stuff a Hayabusa engine in the back, powering only the rear axle. Seems potentially doable. If I had more time & money, I might try it.

stout

Need a third voting option: Open to either, so long as the execution is superb.

918 is very impressive. Very impressive. Incredible, really. But I think I'd still rather have a Ruf CTR, which has one hell of a charismatic engine, two turbos and 1980s EFI and all. Not laggy, really, and the noises are pure 1970s RSR with turbos and waste gates to boot. And it liked spinning to high rpm, feeling free.

So maybe I'd go Turbo after all?*

pete

*Then again, I don't think we've begun to see how cool electric motors may make driver's cars. Torque fill is cooler than you expect, and who doesn't like a high-strung, small-displacement, horsepower-oriented NA engine? Now imagine having a 9000-rpm NA engine with the torque of a 16.5-liter V8, because that's what the 918 feels like when you short shift up a few gears and "lug" its V8. The noise behind you is still flat-plane, small V8, but it pulls like a freight train. It's pretty cool.

Carrera GT

Given the 691 hp 0-60 in 3.2 AWD of the Tesla P85D, there's no sense in these contraptions.

The BMW uses the audio system to synthesize engine noises and you still need to find a gas station and wait around pumping dino-juice into a tank. Idiotic. It also looks like an 80's discotheque.

SamFromTX

Like this?

the-missile

Next video, the Smart will blow up
I just had a good laugh.

dp35

Not exactly. I'm talking about keeping the FWD electric drivetrain's 140hp & 184 lb ft, and adding the Hayabusa's 200hp & 115 lb ft to the rear wheels. This would create a total of 340hp & 299 lb ft., with 59% of the HP at the rear. At around 4,000 lbs., it wouldn't be a world beater, but it would be a fun, unique & futuristic toy that would get incredible fuel mileage.

Technically, the car is smog exempt, and it already has the coveted carpool lane decals. The tree huggers would lose their minds if they saw this little 10,000 RPM rocket bombing around the California HOV lanes. Realistically, it's probably not physically possible, so it'll only exist in my dreams, at least until someone crazier than me takes it on.

dp35

Back to the original topic - Another advantage to motor assist vs turbos is the recovery of energy under breaking. This is what creates significant efficiency gains, and will prevent the demise of performance cars when CAFE standards increase. If for no other reason, this is why motor assist is here to stay and should be embraced IMO.

What about other energy storage systems, such as the flywheel system used in the past by Porsche, and currently by Audi in LMP1? I'm surprised this hasn't found it's way onto a production car yet, because it's obviously working for Audi. Because this is more of a KERS type system, it seems that it would lend itself to performance cars & track use more than batteries. Flywheels are also a more "green" energy storage solution than batteries. This seems like a rare example of technology that both track junkies and tree huggers would approve of, so I'm not sure why we aren't hearing more about it.

neanicu

Looks like we pretty much have our answer after Hatz's interview...

Napoli

This covers it for me.

neanicu

I just thought this thread is very relevant to what has been discussed here lately. Let's see if feelings have changed.

Serge944

2.4 liter flat 6 with short stroke and 9500 RPM (350hp), plus an electric motor between the engine and transmission (150 hp), would be my pick.

Still sounds great, still screams, still delivers (even more instantaneous) power, but with less CO2 emissions.

Keith Verges - Dallas

Interesting how many folks hate turbos enough that they'd rather drag around hundreds of extra pounds of mass. My main track car is turbocharged and IMO all the greatest Porsche race cars have been turbocharged (e.g. 935, 956, 962, 917/30). If it goes fast, it can sound like a flatulent UPS truck for all I care and weight is the greatest enemy of all to performance.