Engine with the biggest 'Power to weight' ratio?

[sirhc]

What is the engine with the biggest power to weight ratio?
Or torque come to that?
Before anybody suggests any turbo engines, how bought if we also include all their required bits n bobs as well (turbos, superchargers, manifolds, intercoolers, pipework, ect).
Not so clear cut now then eh.
Maybe there should be categorys to guide car builders & home tuners.
200,400,600,800,1000 BHP ect.
What do ya reckon?
All running on regular fuel of course & before the laughin gas goes on.
Ive heard of 800BHP Evo's n Scooby's,
1300BHP Skylines,
1000BHP 5 pot Audis,
1000BHP 6 pot Beamers,
600BHP 4 pot Hondas,
800BHP Cossie's ect.
400BHP H'busa's,
No dought almost every USA V8 will make 1000BHP+ in the right hands to.

All far cheaper alternatives to a 987BHP quad turbo Bugatti mill, probably lighter too when you factor in its double figure count of radiators!!

So genlemen & women start your thinkin.

[sirhc]

Thought you might have something with real balls from your answer so
just checked out ya profile.
That Dakar jobbys a beast.
Bet thats not short of a few stallions n torques.
You appologise for it's weight at 1800kg's but that is lighter than alot of the other supercars out there!
I say 'other' supercars cos thats wot your monster is.
Could start a whole new thread 'wot defines a supercar'?
Something thats at the top of the tree when it comes to being built for its purpose maybe.
I.e your Dakar.
Aerodynamics don't really come into play til 60-70MPH anyway.
So bricks are fine by me.

[sirhc]

I agree there could be all sorts of off shoots for this subject.
Most useful would definutely be BHP per £, then you could cross referance with the weights for the best budget option.
Hard to see any engines beating the Yank V8's for BHP per £ though.
Not so well in the weights catergory eh.

If we are talking 'torque' then i think the diesel boys may have the upper hand.
Again though diesels are heavy old bits of kit.
But whats it best to have , lots of power or lots of torque??
Knew i should of payed attention in physics at school!!!


Still along the lines of weight saving.
Im sure there's some clever mathematicians out there who could calculate the size brakes needed for a given weight car too.
Massive brakes are all very well n look the nuts but if ya don't need 'supersize' it's all extra weight int it.

Can feel some new threads coming on!!!

[sirhc]

Cheers for the sugestions.
The only thing that niggles/scares me bout the K is it's liking for a head gasket ( but then dont all Rovers, i know me 220 turbo did).
PPC have an article this month bout the K h/gask but it doesnt really do much to reassure me.
So saying, it still has lots going for it though.
1. Lots of them about.
2. Lots of people have tuned them.
3. Come as N/A or with turbo from factory.
4. Light weight.
5.(My personal favorite) Come in both front & mid mounted options.

And probably ideal for a twin engine set up, as both Rover & Lotus have already done the hard work with the Gearlinkages ect.

Had many a daydream bout a Metro 6R4 replica running that set up.

Seen a Ford KA with a turbo CVH & still FWD. Think that was making bout 250BHP, before the Nitrous.
Dint see it myself but told it cracked an 11 1/4 on street tyres.
Quite feasable as saw it run low 14's @ 120Mph no gas at North Weald.
Best thing was it looked pretty standard too.

I'll have to post a pic of me engine/bay so you can see how limited the space is (maybe in the show us your heart thread).

Quite where i think im gona get the time to do anything i dont know!!
7am/11pm today, are working days sposed to be that long?!?!

[sirhc]

Thats ok, none taken
Its a supercar in the world of 4x4's.
Specially with a twin turbo 5.7 V8 under the hood, bet it can out accelerate a few to

Hark at me goin all american
Sorry did mean bonnet!
Hoods are for heads, da ya get it!! Hoods for heads

[sirhc]

'Full Throttle' is that the magazine thats randomly free with PPC?
Missed it, so what 4x4 do you have?

[sirhc]

Noger said:

The Mountune RST-V8 (two 1 litre yamaha bike engines neatly bolted together) weighs 74kg and puts out 380bhp in race tune. That is without gearbox.

Yer seen those. Look nice n compact, scarey price though

[sirhc]

Snake the Sniper said:

I should say that the engine I suggested, a turbo 'busa at 65-70 kgs is for the whole thing, ie engine, box, clutch, alternator, the works! I have no idea of a just the engine weight is available or even applicable in this case though. But the gear set has to weigh 10 kgs, along with the clutch maybe even 12-15kgs.
So if the "engine" itself weighs 50 or so kilos, you'd be looking at 9 bhp/kg for a real world engine on normal fuel, whilst many of the 800+ cossie et all engines would explode quite quickly if run on 95 RON.

These are certainly monster engines.
How much would one of these babys set ya back?

[sirhc]

chuntington101 said:

sirhc said:

Snake the Sniper said:

I should say that the engine I suggested, a turbo 'busa at 65-70 kgs is for the whole thing, ie engine, box, clutch, alternator, the works! I have no idea of a just the engine weight is available or even applicable in this case though. But the gear set has to weigh 10 kgs, along with the clutch maybe even 12-15kgs.
So if the "engine" itself weighs 50 or so kilos, you'd be looking at 9 bhp/kg for a real world engine on normal fuel, whilst many of the 800+ cossie et all engines would explode quite quickly if run on 95 RON.

These are certainly monster engines.
How much would one of these babys set ya back?

not as much as a built rover K-series for the caterham R500!

K-series built to R500 specs was about £14K

busa engine (and gearbox dont forget! ) is normal around £3K

then if you take it to someone like holeshot (dose all the Dax Rush turbo busa stuff) your looking at this kinda price for the work http://www.holeshotracing.co.uk/tuning/turbo_bike....

i have seen a guy running a GT35R (700bhp capable) on a 1.3 busa and was making over 500bhp! also heard of a guy in the states running a GT4088 and making nearly 650bhp!

Snake, norris design have run their 940 bhp Evo for the last couple of years at that power level. this isn't just a dyno engine or a drag engine. its used in a track are and has covered LOTS of miles at full chat. yes they have to run race fuel (VP Import to be exsact) but then unless you have a V8 your going to have to run some kind of race to get to those power levels.

also is you want REALLY high power in a reasonable weight package and money is no cost then speak to these guys http://www.nelsonracingengines.com/engines-tt.html

oh and one of their latest engines is a 454cubic inch LSX engine that makes over 2000bhp!

thanks Chris.

Thanks for the links Chris.
Did you watch the one with the street car on half throttle
When he put his foot down all hell broke loose
2000bhp in a street car, now thats what i call power.
Just recked those 12"+ street tyres!!!!
Think these lumps may well have the "power to weight" thing on pump fuel sewn up.
Love to see one of these babys in a Broadspeed Jag Coupe replica.

Now that would be the ultimate street car for me