HP per cubic inch question

The M3: 3,2 litres 343 HP.

 

Mercedes-Benz SL65 and CL65.

Twin Turbo 6.0 litre V12 producing 612 HP.

102 HP per litre.

Not enough IMHO...........

 

I think the S2000 does, but I wouldn't want to have to rev the piss out of a daily driver just to find a hole in traffic. For everyday give me a luxo-tank Benz or Jag, the rev happy car would be for weekends.

 

Yeah, I believe the S2000 has the highest specific power output of any normally aspirated engine. If not, it is definitely among the highest.

Is there a table anywhere that shows this for each engine?

Other good figures to have would be weight and volume of entire engine (not engine capacity)--so you could find the power you wanted, the lightest, most efficient engine to make that power, and one that would take the least amount of "packaging" to keep your car's center of gravity and center of mass in the smallest, most optimal location.

Interesting thread.

 

Yeah, let's leave turbos out of it. Turbo usage is cheating, ha!

 

Honda S2000: 2.0L - 240HP - 120HP per liter
Ferrari 355: 3.5L - 380 HP - 1.08.5 HP per liter
Acura Integra Type R: 1.8L - 195HP - 1.08.3 HP per liter

Keep in mind, these are naturally aspirated numbers. I'm quite sure you can find a turbocharged motor out there with a greater rating.

While it doesn't mean anything on the bottom line, it means a lot regarding motor engineering and squeezing out as much HP per liter that you can without increasing the displacement, which increases the size of the motor and the parts inside it (for the most part).

As far as 'driving the piss out of it' to make a passing maneuver in a daily driven car - I could say, test drive it and you'll see what revving to 9K is about, but then it wouldn't be the same. It takes a while to get used to and a while to really feel what driving in the upper RPM ranges in the S2000 is like, as opposed to others. With the S, you'll take it up and peg it on the redline and the person next to you will think the motor is going to blow up. Quite funny, but not going to happen. But I will admit, it isn't for everyone.

 

XJR/XKR, 4.2 liter V8 (4196cc/256 cubic inches) producing 400bhp at 6100rpm or 95 hp/liter.

The Trans-Am engine is a 4.5 liter V8 producing just over 650bhp at 9,000rpm, stock block modified 3.2 sec 0-60, 10.8 trap at 180mph. "While the race engine retains the AJ-V8's lightweight alloy cylinder block and heads, a new heavy-duty crankshaft is fitted along with lightweight racing pistons and connecting rods. A new fuel injection system has been developed by Rocketsports and Bosch."

Sunny

 

TVR Speed 6: 367bhp (at the wheel) out of 3.6 l = 102 bhp/l (Six cylinders)

 

i'm sure a picture would really help this thread...

 

Here you go...this is with gearbox attached. I believe they use Borg-Warner T-5 transmissions.

I think a canted, transverse mount would be great, but presently it's mounted longitudinally.

 

2000 Cobra R - 323cu with 385 RWHP, 385 RWTQ. Flywheel numbers for this car were around 440hp or so.

That's an N/A motor.

 

porsche GT3, realistically at least 400 HP...3.6 liters....about 11.5 hp/ltr

 

http://www3.us.porsche.com/english/usa/911/gt3/default.htm

let's try real numbers here instead of estimating...
380 from a 3.6L = 105.5 hp per liter

 

Today the highest is the RX8 for NA.

 

John Lingenfelter <may he rest in peace> wrote a book "On modifying Small Block Chevrolette Engines" in chapter 2 he indicates this metric is now 1.1 HP/CID and the engine can still meat emissions <sniffer not Government EPA stuff>.

Natrually asperated: Honda S2000 2.0 litres <last year> 240 HP for 120 HP/litre or 2.0 HP/CID! And there are a bunch of engines nowadays between 100 HP/litre and 110 HP/litre {F355, 360,...} BUT nothing is approaching the motorcycle HP wars where the factories are getting 190 HP/litre 3.0 HP/CID! from naturally asperated engines. In addition, whereas cars have been at 110 HP/litre since 1994 (F355 europe), the 600 cc motorcycles of 1994 were at 91 HP and are how at 115 HP! Talk about forward progress!

Porsche GT2 gets some 456? HP from 3.6 litres for 125 HP/litre.

 

131 hp per litre with the 2004 engine at 473 hp.

 

Mitch,

CID = Cubic Inch Displacement ? or what are you calling it?

 

Not necessarily. The rotary doesn't really have a displacement figure. If it did, it would be on top, but it doesn't so it is left for the unique.

Mind telling us what you are referring to?

 

Why hasn't anyone mentioned the F40? 480hp from 2.8l is 170hp per litre. But like someone said, we should be sticking to NA engines...you can do just about anything with a turbo!

 

Schatten....

Sorry....477 hp in the GT2 now.

 

sorry, that's twin-turbo which doesn't count.

because it's turboed and that isn't really what this thread is looking for. it's merely to find out what kind of power was displaced per liter or cubic inch on a naturally aspirated motor. if you want to talk turbos, well that's an entirely different ballpark. but naturally aspirated and from the factory (so, no Ruf's or modded Skylines can compete).

exactly! and I do agree about the super-supercars that as amazing as they are, they don't really qualify that well under this.

and as far as bikes - amazing amazing stuff.

 

Schatten, which part of "Which totally stock, real world use car, has the highest stock hp/cubic inch ratio." didn't you understand? LOL hehe
There's no turbo or supercharger or fuel exclusion. If its driveable daily, and STOCK, then it qualifies. Don't exclude answers because they don't fit your intepretation of the thread.

Sunny