Penforhire

Yeah that BMW K1600GT 1.6 liter motor is interesting. They claim 160 crank HP at 7750 rpm, 129 ft-lb at 5250 rpm (92 ft-lb as low as 1500 rpm). Not bad for sporty-touring. But don't forget the 1 liter I4 motor in their S1000RR motor makes 193 HP and 83 ft-lb!

cyde01

carbon monocoque MR with fixed roof and rear liftback like the Cayman, but with dimensions closer to the elise/exige. hayabusa V8 motor, 400hp with 10k redline. hayabusa V8

ITR #203

Whoops I got carried away but basically, I want a Evora with slightly different styling + more power from a bespoke engine, rather than a Camry engine. Or another way to look at it would be a more powerful, higher revving turbo, Cayman S 2+2.

In the alternative, if this is front engine, rear wheel drive, then its pretty much my dream 1 series M/M3 (with better styling hopefully)

Drivetrain configuration:
Mid-engine, rear wheel drive or Front-engine Rear Wheel Drive

Seating: 2+2

Engine:
3.0L I6 (big bore, short stroke), direct injection, sequential turbo (small turbo for up to 4500 rpm to maximize low and mid range torque, larger turbo kicks in at 4500 and prevents severe dropoff of power at higher rpms)

450 hp at 7800 rpm,
325 ft/lbs of tq at 5500 rpm (with up to 10 second overboost to 380 ft/lbs, 90% of tq. available from 2000 rpm)
8500 rpm redline

Transmission:
7 speed DCT (7th gear is an extreme overdrive for gas mileage)
Mechanical limited slip differential

Chassis:
Mostly Steel with some Aluminum (for cost reasons) but bonded and riveting process (i.e. Lotus)
Weight: 2950 lbs
Weight Distribution: 42/58
Wheelbase: 104 in. (4 inches shorter than current 3 series coupe, 1 in less than 1 series, 3 in more than Lotus Evora)
Length: 171 in. (8 inches shorter than current 3 series coupe, 1 in less than 1 series M, same as Evora)
Width: 72 in. (1 in wider than current 3 series coupe and 1 series M, .8 less than Evora)
Height: 51 in. (3 in lower than current 3 series coupe, 5 in lower than 1 series M, 3 in taller than Evora)
drag: .29

Suspension:
Fully Aluminum, Double Wishbones, front and rear
Tuned by Lotus

Steering:
minimal power steering + quick ratio (somewhere between 12:1 to 13:1)

Electronics:
traction and stability control - but performance oriented with different levels of slip permissible i.e. Ferrari

PRICE (Most importantly): 65k + options

tarheel91

But then two of them wouldn't make a sexy V12. :/

I only saw them claim as much power as the engine it'd be replacing, which was around 157hp if I remember correctly. I'd wager it'd be closer to 170. Either way, I have a feeling the K1600GT would be better at handling the larger load of my dream car vs. a bike. I don't see the S1000RR motor lasting more than 30K miles in something like my car.

@ITR: I'm thinking that engine should be making a good bit more than 450hp at 7750 RPM. It'd be somewhere around 310hp NA; are you telling me you're only going to run 8-9 PSI on your dream car?

Otherwise, that sounds like pretty much the perfect daily driver.

ITR #203

Yeah, I would want it to run similar or slightly fewer psi as the current N54 BMW motors, as evidenced by a similar/slightly lower peak tq. number as the N54 in the 1 series M/Z4sDrive 35is (which makes 332 ft/lbs). Controlling heat on a turbo motor is always an issue especially as the psi increases and with the high rpm powerband that I enjoy, I'd imagine it would be even more difficult. So in the name of reliability, I'd keep the psi relatively low. Of course, this motor would be "overbuilt" and would respond nicely to modifications for more power.

Plus, I mentioned that it would make 90% of peak tq. of 325 ft/lbs from 2000 rpms to redline. 90% of peak tq. at 7800 rpms, results in roughly 434 hp so, 450 was a realistic number.

tarheel91

Honestly, it sounds like you want a turboed E46 M3 with a bit less weight. The S54 is basically a detuned race engine. Those cars can run 5-600hp on stock internals pretty easily.

EastS2k

convertible and coupe variant weight being about 50lbs more for the convertible
2 door 2 seater
RWD w/ torsen LSD
6 speed manual with out optional auto or dct - 6th gear exceptionally tall for awesome highway cruising and high top speed
power plant - 4 cyl turbo w/ 8500 redline ~ 345 crank hp 300+ tq
55-45 weight distribution
Optional overboost option: 500whp 400tq for 20 seconds
Curb weight: ~2500lbs

kppolo3

dombey

I am easily pleased as well. I want a Boxster Spyder with the GT3 RS 4.0 500-horse motor dropped into it. Radio, A/C, Xenons, PDK. I want it in Cream White, and I want gunmetal 360 Forged Concave Mesh 18" wheels.