V12 @ 8500 Rpm ???

[DemoX]

Which V12 engine can stand such high RPM ?? (8500 RPM)

Mercedes DOHC V12 ?
The New BMW DOHC V12 ?

Now i know that the Ferrari V12 can !!

But which V12 engine els can stand it ??

DemoX AKA Bo Sørensen / Bob
DemoX@ofir.dk

[SaabJohan]

If you want an engine that can handle 8500 rpms without modifications you will probably need to look at V12 engines like the BMW engine used in McLaren F1, the Bugatti engine in EB110, formula one engines from around 1989 and newer and so on.

[DemoX]

Well SaabJohan...

it has to have mods to bring high horses also !!

DemoX AKA Bo Sørensen / Bob
DemoX@ofir.dk

[Pringles]

Can you tell us why you ask this question?
To withstand that kind of speed, the engine would have to be designed and built to be strong enough to withstand it obviously. You could also take a relatively low-revving Lamborghini V12 from a Murcielago say, and modify it to allow it to spin to 10000rpm or more (who knows?) if you wanted to, but you would have to modify/replace a lot of its internal components to make it strong enough to do that, not to mention it would cost a fortune and very likely would need constant rebuilding. Ferrari F50's engine revs to 8500rpm or slightly more if I'm not mistaken, but there are modified racing versions of that same engine which rev beyond 10000rpm I believe.

[DemoX]

So you think that i should get a Custom built V12 ?

To withstand the high revs and high horses (824 BHP)

But that cost like $200.000,00 USDollars !!

[Pringles]

Not custom built. Take an existing V12 engine, any V12 engine you want and take it to a reputable engine builder. If he knows his trade well he can do pretty much anything if money is no object.

Where did you get 824bhp from or did I miss something?

[DemoX]

The 824 bhp is the horsepower i want my custom built (one-off) Supercar or maybe production car!! Only 1200 kg !

But lets not focus on that !!

What is a Reputable Engine Builder ??

[ivymike1031]

Originally Posted by DemoX

What is a Reputable Engine Builder ??

If you're asking what the words mean, see below. If you want to know whether such a person is in your area, I can't help you!

An "engine builder" is a person who rebuilds (remanufactures) engines, usually for high performance applications. He will take an engine delivered by a customer, and perform certain requested tasks on it, such as upgrading internal components or making simple modifications to the geometry.

"Reputable" simply means that the person has a good reputation and can be trusted to perform the work adequately.

[Pringles]

824bhp exactly huh? So would 825bhp be too much?


Did you use some kind of mathematical equation to arrive at this magical 824 number or is it just a random number?


I'm guessing if you used a Ferrari F50's V12 as a base for this, you would need to be turning some pretty serious RPM's to get that amount of power from 4700cc's in N/A form. Close to 14000rpm if I'm right


Lamborghini V12 there are 5700, 6000 or 6200cc versions you can use but I don't know if they can be modified to spin at the kind of speeds needed to produce that kind of power.


At the end of the day this is all just a dream isn't it? I doubt you really have the money to fund a project like this and if you really did, I doubt you'd be asking for advice here... but it's all good.

[DemoX]

ivymike1031: thanks

Pringles: the 800 came to me because 700 was to little and 900 was to much (after my head)
24 i got this way: V12 - V = 12
Twin Turbo = 2 Turbo - Turbo = 2
2 * 12 = 24

To answer your question about the 825 !!

No it wouldn't be to much !!

and yes this is just a dream that i might try to realize !!

DemoX AKA Bo Sørensen
DemoX@ofir.dk

[SaabJohan]

Koenig have a twinturbo-kit for the Ferrari F50, with that the engine gives 850 hp @ 7600 rpm.

Another thing that should be possible is to modify an old F1 engine like this one:
http://www.alfapower.nu/albums/album58/aag.jpg
http://www.alfapower.nu/albums/album58/aah.jpg
http://www.alfapower.nu/albums/album58/aai.jpg

But engines like this aren't cheap.

[Pringles]

For some reason I kept thinking you wanted N/A (Normally Aspirated). If you want to use forced induction then it will be much easier to attain that kind of power. As SaabJohan mentioned, Koenig have already done this to the F50 and the Diablo.

[Neutrino]

well for an engine to suport high revs generally has to have the folowing:

light crankshaft, with small lobes(you'll lose torque however), lighweight rods that will resist bending at high rpm, short rods for short piston strokes will help too(again you'll lose some more torque), and finally lighweight pistons


in the head you'll want a lighweight camshaft(eg. a holow one) with a profile that will put the power in the high rpm band, lighweight valves, very high rate springs, and some good retainers.



those are the standard mods that you can do to an engine to resist high rpm.

[SaabJohan]

A low weight crankshaft as well as the hollow camshafts are mainly for keeping the weight of the engine as low as possible, and to reduce inertia.

The weight of the conrods are not that important, what is most important is that they're strong. Most of the conrod is rotational weight and it's most important to keep the weight of the reciprocating parts low, this means pistons and pistonpins.

The most important thing with the crankshaft is that it's rigid and don't bend under load. It should be aerodynamic and should not carry unnessecary weight. It's surface should be smooth to minimize the risk of cracks. Of course the stroke should be short.

The conrods should be long and the pistonpin should be placed high i the piston. Steel are recommended over titanium in conrods for a "streetcar", but titanium can be used.

The valvetrain should have valves of titanium, with nimonic (or similar superalloy) exhaust valves it the engine is turbocharged. Seats and valveguides can be made from beryllium-copper. Double valvesprings and lightweight mechnical cam followers.

[DemoX]

wow... you guys knows ALOT !!

Which engine do you guys think that would be the best to do all this stuff with ??
i don't want a Ferrari or Lambo V12 but it has to be DOHC

DemoX AKA Bo Sørensen / Bob
DemoX@ofir.dk