I've never tried getting close, and since I'm NA I would be sorely disappointed. But for anybody bored, here's an alternate calculation on the power and such:

To skip a lot of the calcs and guesswork on things like the Cd and assumed area for that Cd, we can just assume we're drag limited to ~155mph with a stock car at ~200whp. It's around there somewhere. A good first order estimate would be to just assume drag increases with velocity squared. (200mph)^2/(155mph)^2 = 1.66, so you'll need at least 1.66*200whp = ~325-350whp to equal out the drag at 200mph with a completely stock setup.

There's more to it though.

As mentioned earlier, if you're using the minimum power it takes to get to a speed, it will take you forever to get there. You'll probably need another 100whp just to give you power for acceleration, and while you technically don't need it, you probably very much want a bit of extra downforce. The aero would increase the drag some and you'd in turn need a bit more power to overcome that, but how much would depend completely on the setup.

My opinion: The 450-500whp territory sounds about right. You want to take a trip out to the salt flats, GrandMasterKhan?



Edit: Did a quick search, and I didn't find anything much more than high 160s. However, I found a better source for the power requirement:

http://forums.s2kca.com/archive/index.php/t-7789.html
In 2002 C&D’s Tony Swan and West Tech Racing attempted to set at new speed record for the G/GT class (engines displacing 1.51-2.00 liters) with an S2000. Their two way average speed was 153.864 mph. The car was lowered two inches, had special Mickey Thompson salt tires, OEM lip, exhaust porting to the head, a Comptech header, and stand alone engine management. The car dynoed at 255 horses at the wheels.

That 255 WHP to 154 mph average speed ratio puts the 1.66 ratio based guess at 425 whp needed for an average speed of 200mph at the salt flats, assuming no aero.

 

Aerodynamic drag does increase with velocity squared, but POWER required to overcome aero drag increases with velocity CUBED.
This is because POWER is force multiplied by velocity. If velocity doubles, the aero drag force quadruples, but power required to overcome drag octuples (8x)!

So if you need 200rwhp to go 155mph, you'll need something closer to 200^3/155^3 or 2.15x 200rwhp, or 430rwhp. That's a little conservative because only the aero drag is increasing with the square of speed, rolling resistance is closer to constant.

 

For starters you need a different tranny/diff/final drive ratio. The gearing just isn't there stock.

I don't know how much more power than 500hp you'll need, wind tunnel testing would be required. The NSX with 290hp gets up to 172mph.

 

just boost and s2k and change the fd in forza. Safer than trying it on the road LOL

 

I already did the gear calculations. It would require an ap1 engine, with an ap2 trans with the ap1 secondary reduction gear, and 275/40/18 rear tires. That will get you hair over 200mph in 6th gear. Oh yes, and you'll need lots of runway and lots of boost. and probably an insane driver.

 

lol

 

If you built it right, you'd have an upgraded tranny with custom gear ratios.

 

in theory they all should be the same if the tranny gear ratio and final drive are the same since if you maxed out at 9000rpm on the 6th gear they all going to be the same, the different is that FI cars will get to the top speed faster than the non-FI cars..........

thats just theory though.....

 

Insane driver? lol, get me a cage and a HANS device and I'm good to go.

 

In your theory you arent taking into account that an s is drag limited to 155 (154 in my experience) with stockish power.

Gmk, if your redline is 10-11k with everything else you mentioned, would someone still need an ap2 tranny?