RE: German Supercar Aims For 2800hp
Discussion
Already 4 rotor convertions for 1.3lr mazda that run over 1000bhp with big turbos, and the N/A Mazda race engines were making about 750bhp for 2.6l. Adding some turbos to the race spec engine could make the power they claim [though not get anywhere near putting the power to the road for the figures] they are after, though expect to stop at every garage you pass for fuel.
Four rotor wankel sound rather fantastic too.
http://vimeo.com/13278462
Four rotor wankel sound rather fantastic too.
http://vimeo.com/13278462
Mr Whippy said:
3.1g ish acceleration.
What tyres is it going to use
If it's on a drag strip with drag wheels/tyres, maybe?!
I'd imagine 1.2-1.3g acceleration is about the limit for road car tyres to 60/100mph ish until down-force can give you a bit more to work with...
Dave
Top fuel drag cars push 4 g acceleration so yeah there is no way they could get road legal tyres that would be able to handle 3.1 g even with 405/20R22 rear tyresWhat tyres is it going to use
If it's on a drag strip with drag wheels/tyres, maybe?!
I'd imagine 1.2-1.3g acceleration is about the limit for road car tyres to 60/100mph ish until down-force can give you a bit more to work with...
Dave
t chrisgtx said:
The emissions seems a bit dubious to me,if Mazda can't manage it i doubt these lot will,especially the amount of power they plan to push out.
I bet it would sound nice though,google 4 rotor RX8.
IIRC the Mazda rotary is a pretty poor design. One engineer friend was telling me he was mid way through designing a rotary engine which would improve on mazda efforts in every way.I bet it would sound nice though,google 4 rotor RX8.
Oh, and there's no road legal tyre that will allow anything close to those times printed.
Ok, so Queen Street Rotary in New Zealand have extracted 1664bhp from a 4 rotor, but that's in a drag car with 2 of the biggest turbos I've ever seen.
1200bhp from a road going version seems possible but that's only 450odd bhp less than a drag car which gets 'serviced' every run.
Let's say that's theoretically possible though, as I suppose it is...
The 8 rotor version however, 2800bhp... that's more than twice what they quote for the 'half' engine, which again, I suppose is possible as we all know that in most cases and engine can produce greater power than the sum of it's parts (Powertec V8 for example) but, that's going to need 4 rather substantial turbos, which are going to totally ruin it for road use.
Tyres, again, possible if it runs on drag radials, but I seem to remember SSC quoting silly 0-60 figures which never came to fruition?
0-60 in 0.9 seconds is what, top alcohol drag car speed? not a chance on a road car using DOT approved tyres.
I'm intrigued though, I've always wanted to see a wankel engine with more than 4 rotors.
When I worked in Coventry there was a local rotary specialist who had a mocked up 6 rotor and it was massive, should have made about 1000bhp naturally aspirated too, but would have been to expensive to engineer as the crank was so long it would have flexed all over the shop.
I don't think it can be done, unless they're running 2 engines side by side, a la "U" engine? that should eliminate eccentric shaft issues and space problems too, an 8 rotor engine would be really rather long.
Also, it'd need 16 spark plugs, or maybe even 24 (if they run it like the 787B 26B engine) which at £25 a pop, at trade prices, isn't going to be a cheap service.
1200bhp from a road going version seems possible but that's only 450odd bhp less than a drag car which gets 'serviced' every run.
Let's say that's theoretically possible though, as I suppose it is...
The 8 rotor version however, 2800bhp... that's more than twice what they quote for the 'half' engine, which again, I suppose is possible as we all know that in most cases and engine can produce greater power than the sum of it's parts (Powertec V8 for example) but, that's going to need 4 rather substantial turbos, which are going to totally ruin it for road use.
Tyres, again, possible if it runs on drag radials, but I seem to remember SSC quoting silly 0-60 figures which never came to fruition?
0-60 in 0.9 seconds is what, top alcohol drag car speed? not a chance on a road car using DOT approved tyres.
I'm intrigued though, I've always wanted to see a wankel engine with more than 4 rotors.
When I worked in Coventry there was a local rotary specialist who had a mocked up 6 rotor and it was massive, should have made about 1000bhp naturally aspirated too, but would have been to expensive to engineer as the crank was so long it would have flexed all over the shop.
I don't think it can be done, unless they're running 2 engines side by side, a la "U" engine? that should eliminate eccentric shaft issues and space problems too, an 8 rotor engine would be really rather long.
Also, it'd need 16 spark plugs, or maybe even 24 (if they run it like the 787B 26B engine) which at £25 a pop, at trade prices, isn't going to be a cheap service.
Edited by Robmarriott on Tuesday 30th August 12:59
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