Why do you need V8?

[s2k7]

here's the shadow of Chapman --- 40kg @ 400hp.

 

 

http://www.motorsport.com/lemans/news/nissan-unveils-revolutionary-petrol-engine-to-complement-electric-zeod-rc-powerplant-vid/

[bigdog]

I shudder to think at how short a life it will have at that kind of output, as the cylinder pressures must be astronomical along with turbo lag. (do a search on the BMW F1 M10 1.5ltr fours that put out 1350HP to see what small can do) Turn down the HP a bit and you might have something. Even at just 200HP the lack of weight would be like a much higher HP engine.

[rnr]

  bigdog said:

I shudder to think at how short a life it will have at that kind of output

 

Le Mans winners routinely do over 3000 miles in the race so it will have to have a pretty decent life if they plan on completing the race. 3k is probably more than most Sevens get driven in a year.

[s2k7]

I think the secret was in metallurgy & tolerance.

[MightyMike]

I'd imagine the price tag on that engine is far out of reach for most 7 owners.

[xcarguy]

  MightyMike said:

I'd imagine the price tag on that engine is far out of reach for most 7 owners.

 

That's one of my reasons for a V8! :smilielol5:

[supersportsp]

Other than the compact size, I am not sure why everyone seems to be so impressed by this. You can get a 2.0 turbo four in a regular production Mercedes sedan (CLA 45 AMG) that makes 355 hp and 322 ft-lb at 2200 RPM.

 

WRC cars are 1.6 liter turbo units which are restricted to 300 hp. They could probably easily be putting out 400 hp reliably without restrictors.

 

I still prefer normally aspirated motors for Sevens, but turbocharged motors are getting really, really good. With direct injection and new turbo systems there is almost no lag.

[bigdog]

  supersportsp said:

Other than the compact size, I am not sure why everyone seems to be so impressed by this. You can get a 2.0 turbo four in a regular production Mercedes sedan (CLA 45 AMG) that makes 355 hp and 322 ft-lb at 2200 RPM.

 

WRC cars are 1.6 liter turbo units which are restricted to 300 hp. They could probably easily be putting out 400 hp reliably without restrictors.

 

I still prefer normally aspirated motors for Sevens, but turbocharged motors are getting really, really good. With direct injection and new turbo systems there is almost no lag.

 

The compact size and very lite weight are the point. If you can reduce the weight of a seven by 180Lbs that's a 15% reduction, Which is equivalent to your family car loosing 700-800 lbs.

[s2k7]

"I am not sure why everyone seems to be so impressed by this. You can get a 2.0 turbo four in a regular production Mercedes sedan"

 

Ok let me see you carry your regular 2.0 4 banger like this.

http://jalopnik.com/nissans-new-le-mans-engine-has-400-hp-and-can-fit-in-y-1509734976

[carsport]

88lbs for the Nissan engine.

 

Wow!! Colin Chapman used an 88lb engine in the Europa sourced from the Renault 16. That was 88lbs without guts though I think -- just the block and head.

 

I think it produced 80 HP.

[HOTTTCAR]

I had a 3 cylinder 2 stroke Saab when I was in high school. Fun gymkhana car. Front wheel drive, built in roll bar, ebrake to control the rear end. Many were used as rally race cars. This thing blew perfect smoke rings out of the exhaust pipe. Hilarious. One person could easily carry the engine around. But the hp ........not so much.

Gale

Edited January 29, 2014 by HOTTTCAR

[Nick OTeen]

But the 3-cylinder, two-stroke SAAB engines could be tuned to increase the output. The GT 850 mills (841cc) could be modified back in the day per SAAB Sport & Rally specs to put out much more than the stock 55hp.

 

Carburetor and exhaust mods - along with altering the intake and exhaust ports and so-called "finger porting" of the internal transfer ports - could bring numbers in the range of 100hp. Not bad for an engine that was very compact and only had seven moving parts.

[cheapracer]

  supersportsp said:

With direct injection and new turbo systems there is almost no lag.

 

 

Actually even though I don't like lag you can adjust and predict for it and there's no doubt about the power but until they get some throttle sensitivity and the general crudeness of "point and squirt", it's a "pass" from me.