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13 Nov 2008, 22:11 (Ref:2334574) | #1 | |
Racer
Join Date: Oct 2006
Posts: 253
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What N/A engine has best power/weight ratio?
Hoping you hillclimb guys can answer this..
Had a discussion with a friend of mine who reckons rotary engines provide the best power to weight ratio of all naturally aspirated powerplants while Im thinking the 90KG Hayabusa derived Hartley V8 with over 400bhp must be right up there. The amazing DP1 uses this powerplant.. see http://www.dpcars.net/dp1/index.htm There must be other engines also, please educate me.. Cheers, |
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13 Nov 2008, 22:34 (Ref:2334583) | #2 | ||
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Certainly not my 1500 spitfire engine mores the pity.
Claypole |
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13 Nov 2008, 22:52 (Ref:2334588) | #3 | ||
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Join Date: Feb 2004
Posts: 1,677
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Aside from Motorbike and special Engines (2.4 supercharged V8 in the Caterham lavante(sp?) etc etc) usual 4 pot engines, The Rover K-series, Ford Sigma and Ford Duratec (Mazda MZR) are all very light (around 100 kg) with reasonable scope for power.
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The race track and the human body, both born of the earth, drive to be one with the earth, and through the earth one with the car, drive to the undiminished dream, single moments of pleasure, an eternity of memories. |
14 Nov 2008, 09:06 (Ref:2334728) | #4 | ||
Racer
Join Date: Nov 2003
Posts: 173
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Assuming you mean any engine, then you are into the realms of F1 V8 engine @ approx 100 kgs and 800 bhp or the Moto Gp 990cc engine which i figures must only weight 50 kgs and produced approx 260bhp.
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14 Nov 2008, 16:51 (Ref:2334933) | #5 | |||
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Quote:
One thing hillclimbing has proved time and time again, is that brute power to weight is academic if the way the engine delivers the power, or the logistics of it's design (low c of g, it's installation, the gearbox needed to transmit the power) is wrong for the application. Mr Wight, who posts on here can attest to that. A few years ago he bought an ex DTM Opel/Cosworth 2.6 V6 into the sport. The combination of a lighter nimbler chassis with a more "drivable" engine compared to the 4.0l V8 brutes that were popular at the time, wiped the floor with everybody and reset the standards of the sport. True, eventually, higher BHP won the day. But not before the point was emphatically made. |
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14 Nov 2008, 23:52 (Ref:2335110) | #6 | ||
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Quote:
That includes the gearbox too though doesn't it? |
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14 Nov 2008, 15:32 (Ref:2334884) | #7 | ||
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Posts: 3,750
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How about the Novarossi Plus12-5SCT. Weighs 225g and throws out 1.7bhp (do the math!), Peak RPM is over 45000 RPM
http://www.novarossi.com/content_uk/...lus12-5sct.htm |
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I want a hat with "I only wanted one comb" written on it. |
15 Nov 2008, 00:25 (Ref:2335122) | #8 | ||
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Quote:
You can't exactly power a Caterfield with one though. |
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15 Nov 2008, 01:11 (Ref:2335136) | #9 | |
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Join Date: Oct 2002
Posts: 1,538
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IIRC Juniors V10 weighs about 85kg (from what I can remember being told) and can produce in excess of 750bhp so that scores quite high on the list I suspect..
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If your not confused......You dont know whats going on... Diesel..........The fuel of the future |
15 Nov 2008, 09:15 (Ref:2335222) | #10 | |||
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17 Nov 2008, 16:43 (Ref:2336450) | #11 | ||
Rookie
Join Date: Oct 2003
Posts: 35
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Swiss Auto 500cc Two Stroke used in solo motorcycle and sidecar racing 200 bhp on a good day 39 kgs including gearbox
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17 Nov 2008, 21:22 (Ref:2336625) | #12 | ||
Veteran
Join Date: Nov 2000
Posts: 8,298
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Oh I rememebr that Swissauto thing, I think if I rememebr Rolf Biland the sidecar ace of years developed it to replace the inline 4 sidecar engines.
The engine was also used later on in a 500 2 wheeler by MZ, was very powerful and quick but had a real harsh power delivery What a lot of people dont know is that Swissauto develoepd a 250 turbo 2 stroke before this in teh 80's. Now imaguine that in the wet, tiny powerband and a turbo!! These guys are nuts! |
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18 Nov 2008, 08:40 (Ref:2336826) | #13 | ||
Rookie
Join Date: Oct 2003
Posts: 35
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If you want extreme two stroke power then start googling Snowmobile Drag racing also some American race series allow two stroke engines .I quite like the idea of a 2 litre v8 Two stroke hillclimber but don't have the funds to get it done anytime soon and if Juniors electric car is successful everything else will be obsolete .
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18 Nov 2008, 09:35 (Ref:2336858) | #14 | |||
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19 Nov 2008, 16:42 (Ref:2337718) | #15 | ||
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19 Nov 2008, 17:07 (Ref:2337730) | #16 | |||
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4 Dec 2008, 05:25 (Ref:2347012) | #17 | |||
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Join Date: Nov 2008
Posts: 8
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Quote:
Seriously,at the current {didn,t mean the pun,honestly] rate of battery development,then battery powered cars should be very competitive,with amazing overall power to weight ratio |
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4 Dec 2008, 09:52 (Ref:2347098) | #18 | |||
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19 Nov 2008, 22:01 (Ref:2337947) | #19 | ||
Race Official
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Posts: 12,454
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The trick is to plug it in to the member's tent so that he has an effective 2000 yards. Don't run over the cable half way up, of course.
Sorry, there was a serious topic here originally, back to it. I guess. |
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3 Dec 2008, 12:09 (Ref:2346323) | #20 | ||
Racer
Join Date: Jul 2007
Posts: 372
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Ask your mate what sort of torque the rotary produces, then you will find its shortcomings.
duratecs and sigmas seem to be the cheap readily avaialble engine of choice, taking over from the VX16V |
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2017 NSSCC Champion You cant win a race at the first corner, but you can lose it.... |
6 Feb 2009, 13:51 (Ref:2389785) | #21 | ||
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Tooooo much information there!
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Bill Bryson: It is no longer permitted to be stupid and slow. You must choose one or the other. |
25 Feb 2009, 13:05 (Ref:2403859) | #22 | ||
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Join Date: Jun 2000
Posts: 35
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far to much info, however a valid point. If you cant afford the hand crafted Italian piece of art then speak to Martin Schanche and im sure he will be a touch cheaper than buying a Leonardo da Vinci engine.
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2 Mar 2009, 13:46 (Ref:2407370) | #23 | ||
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I wonder how long it will take now there's a recession on, an engine freeze and V8's are a la mode, for some de tuned v10's to suddenly appear. There can't be much leading edge tech in them worth holding onto, espicially when folk may have some wedge to blow and teams are pleading penuary......
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I want a hat with "I only wanted one comb" written on it. |
22 Apr 2009, 14:22 (Ref:2447036) | #24 | ||
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Posts: 84
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You guys are serious I can tell!
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Michael Bishop hill+car+speed=Buzz |
23 Apr 2009, 07:24 (Ref:2447585) | #25 | |
Rookie
Join Date: Apr 2009
Posts: 8
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I can't manage the link, but there is footage on Youtube of Reto Meisel's Mercedes 190 fitted with a Judd V8. Extraordinary, but costly. The Mercedes Cosworth 2.3-16 valve four-pot is a good candidate and will run to 300-330 bhp normally-aspirated with a basic standalone fuel layout. Turbocharged, they'll do 600 bhp, I'm told...
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