[/QUOTE] guess is about 340-350 hp. A S2000 Pug has 280 hp = 140 hp / litre * 2,5 = 350 hp.[/QUOTE]
Since Torque is a big issue in rally, what would the difference in torque be between S2000 and S2500, including torque range ?
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[/QUOTE] guess is about 340-350 hp. A S2000 Pug has 280 hp = 140 hp / litre * 2,5 = 350 hp.[/QUOTE]
Since Torque is a big issue in rally, what would the difference in torque be between S2000 and S2500, including torque range ?
[/QUOTE] My guess is about 340-350 hp. A S2000 Pug has 280 hp = 140 hp / litre * 2,5 = 350 hp.[/QUOTE]
Since Torque is a big issue in rally, what would the difference in torque be between S2000 and S2500, including torque range ?
Don,t know exact figures but i believe a diamond millington at 2.5 litre is pushing between 220 and 240hp with adequate torqe figures to make it all work and all for a price of circa 20 - 25k.
Andy Burtons Peugeot cosworth is 2.5 nat aspV6,goes like s**t of a shovel and makes the hairs on the back of your neck rise when you hear it coming.It is also twice as impresive to watch compared to any W.R.C.
Any news of the McRae SX4 project, or did that also die along with Colin ?
That one is also using a 2.5 NA is it not ?
i like the s2000,but there are 2 problems
1.VALUE FOR MONEY
A s2000 car costs 168.000 euros minimum,plus spares
A real N4 Evo 9 from a proper team,for example Ralliart Italy, costs around 135.000 euros.paolo andreucci almost won the title with an evo 9
Plus you have to service an s2000 after every 2 rallies,while an Subaru or evo must be serviced twice a year
2.TORQUE because of the lack of turbo
Quote:
Originally Posted by Sulland
:confused:
The only McRae concept auto project I know is the 4WD for the Rally-Raid...
You're forgetting the R4.
Bur R4 can't be homologated for rally since it has no production base...
Quote:
Originally Posted by Sulland
I made some comparison with other NA engines and it seems that at top power there is about 80%-90% of the top torque in use. With an engine producing 350 hp @ 8500 rpm the torque would be 285 Nm (lb-ft = 285 * 0,7376 = 213 lb-ft). If 90% of the torque were in use at top power, the top torque would be 321 Nm. If the percentage is 85% the torque is 340 Nm and with 80% the torque is 361 Nm.
If the engine produce 350 hp @ 8000 rpm the results are:
90% = 341 Nm
85% = 361 Nm
80% = 384 Nm
The torque range I believe depends so much on the engines attributes (camshaft timings etc.) so it’]http://www.channel4.com/4car/news/news-story.jsp?news_id=14836[/URL]
This is still quite far away from the torques of Subaru and Mitsubishis grp N cars torques.
Subaru: 285 hp @ 4400 rpm / 570 Nm @ 3500 rpm
Mitsubishi: 292 hp @ 4300 rpm / 580 Nm @ 3300 rpm
I’d still prefer a NA engine with higher revs and lower torque. And if the cars had a fixed front/rear torque split 40/60 they would act more like a rear wheel drive cars, which would be more spectacular.
The formula I used in my calculations:
P (W) = T (Nm) * 2 * pii * n (1/sec)
P = power
T = torque
2 * pii * n = angular velocity
To make it easier to calculate and use hp and rev/min in the formula I made the following:
1 kW = 1,36 hp
1 rev/min = 1/60 rev/sec
1 W = 0,001 kW
(2 * pii * 1,36 * 0,001) / 60 = 0,001424
Now the formula is P (hp) = T (Nm) * n (rev/min) * 0,0001424
For example the R4 torque at top power is T = P / (n * 0,0001424) = 340 / (7900 * 0,0001424) = 302 Nm and 302 / 332 * 100 = 90,96%.
And the cost of a S2000 is not just the 168.000 €, this is the price of the S20000 kit. The price of a S2000 that is ready to race is much higher (http://www.motorsportforums.com/foru...12634-p-3.html)Quote:
Originally Posted by urabus-denoS2000
So the inclusive price for a S2000 is about twice than a full spec N group car.
But I think FIA is not talking about that the future WRC cars had to be a group N or a S2000 car but a car BASED ON GROUP N OR S2000. IMO that could mean that the WRC car based on group N would be allowed more advanced suspension, some engine parts replaced (pistons, camshaft). That could get the prices more close to each other. For a S2000 it could mean a turbo or if not a turbo perhaps a mechanical supercharger (roots).