1 2 3 4
alfadriver
alfadriver MegaDork
3/14/16 6:39 a.m.

Seeing an Alfa do 230 mph, I would choose a Miata. With the cheap V8 swap, as was done in 2003 for the challenge.

Fully MS treatment.

I would think that body shape could do 200mph for just around 400 hp.

For the bikers out there- you are brave. I knew a biker LSR. She was really good looking. Even with tubes running out of her after a big, big crash.

NOHOME
NOHOME PowerDork
3/14/16 6:48 a.m.
DanyloS wrote: Going along with the train theme the Mag-Lev train from Shanghai to the airport will get you to ~400kmh which is just shy of 250mph for about $20-$25 (plus its awesome because it goes along the highway for a few miles) Otherwise 3rd gen Firebird or C4 Corvette are prob a good starting point

Don't forget the point where the inbound and outbound trains cross. The combined passing speed is pretty cool to see.

Last time I was on the train they were not going anywhere near full speed as Chinese build quality was starting to rear its head.

The R&T article was interesting

http://www.caranddriver.com/features/mrs-orcutts-driveway-204-mph-on-a-double-nickel-road-page-1

Knurled
Knurled GRM+ Memberand MegaDork
3/14/16 6:59 a.m.
Flight Service wrote: Shanghai maglev, 268 mph for about $20 Oh you mean cars.... Junkyard LS2/3 with cam and valves springs to get it over 500 in a late model C4 with a little aero work. Calculations say it should take about ~450 hp to hit the double century mark (0.33 cD and 19 soft frontal area.) That should do it.

IIRC a C4 requires about 650hp to break 200mph.

That is one thing. The goal is 200mph trap speed in a standing mile. That needs a little bit more power than that. Upthead 1000hp was mentioned, that sounds about right since 1000hp in most cars will see 150mph trap speeds in the quarter mile. If you are going 150mph then you will travel 3/4 of a mile in 18 seconds. At 200mph you will travel 3/4mi in 13.5 seconds. 150-200mph acceleration in ~15 seconds is asking a lot.

MadScientistMatt
MadScientistMatt UberDork
3/14/16 7:15 a.m.

C4 Corvette with a secondhand circle track motor under the hood.

Huckleberry
Huckleberry MegaDork
3/14/16 7:23 a.m.

A streamlined skydiver, head down like a dart toward earth can reach a terminal velocity of close to 300mph on a good day. It's about $85 around here if you have your own chute.

edizzle89
edizzle89 HalfDork
3/14/16 7:35 a.m.
MadScientistMatt wrote: C4 Corvette with a secondhand circle track motor under the hood.

^this, or LS with boost

one of my favorite vehicles of all time, The callaway corvette sledgehammer, was able to do 254 with ~900 hp. of course that was done on a test track so obviously a standing mile would be a slower speed but with a rear gear swap to get your max speed to 200 rather then 250 i think i would be close.

KyAllroad
KyAllroad UltraDork
3/14/16 8:05 a.m.
Huckleberry wrote: A streamlined skydiver, head down like a dart toward earth can reach a terminal velocity of close to 300mph on a good day. It's about $85 around here if you have your own chute.

Beat me to it, my first thought was skydiving as well.

https://en.wikipedia.org/wiki/Terminal_velocity

Is the requirement for this exercise a flying mile or just a high speed blast on the autobahn? The extra time to wind up to speed makes a difference. No way in hell would I EVER try it on a bike though.

eastsidemav
eastsidemav Dork
3/14/16 8:40 a.m.
eastsidemav wrote: I'd assume a 3rd generation Firebird would be a good starting point. I think some used to even sell a body kit for land speed racing for it, before they got into diesel tuning.

Just remembered, it was Gale Banks, I think.

Brian
Brian MegaDork
3/14/16 8:52 a.m.
eastsidemav wrote:
eastsidemav wrote: I'd assume a 3rd generation Firebird would be a good starting point. I think some used to even sell a body kit for land speed racing for it, before they got into diesel tuning.
Just remembered, it was Gale Banks, I think.

Yes. The kit was sweet. I remember it from CC and really wanting a 3G Firebird when I was 19.

Woody
Woody GRM+ Memberand MegaDork
3/14/16 8:57 a.m.

I think that the cheapest way to get a 200 mph car would be to contact Andy Nelson and ask how much it would cost for him to build you a 200 mph car.

GameboyRMH
GameboyRMH GRM+ Memberand MegaDork
3/14/16 9:03 a.m.

My first thought was a modded 'busa.

The Shanghai maglev train is the best cheater's answer, if the Earth's orbit or rotation don't count

For a car, your best bet would have to be a belly tank landspeeder. It'll get up to 200 with a lot less work than a Stealth or a Corvette.

eastsidemav
eastsidemav Dork
3/14/16 9:09 a.m.
GameboyRMH wrote: My first thought was a modded 'busa. The Shanghai maglev train is the best cheater's answer, if the Earth's orbit or rotation don't count For a car, your best bet would have to be a belly tank landspeeder. It'll get up to 200 with a lot less work than a Stealth or a Corvette.

Good point. A Hayabusa would probably be the easiest and cheapest, but for a four wheeled vehicle, a streamliner would be cheaper than a production car, if you've got the time and skill to fabricate it. It's just a matter of whether you want to put time/effort into the chassis, or money into the engine.

Flight Service
Flight Service MegaDork
3/14/16 9:13 a.m.
alfadriver wrote: Seeing an Alfa do 230 mph, I would choose a Miata. With the cheap V8 swap, as was done in 2003 for the challenge. Fully MS treatment. I would think that body shape could do 200mph for just around 400 hp. For the bikers out there- you are brave. I knew a biker LSR. She was really good looking. Even with tubes running out of her after a big, big crash.

Your about 100 hp short.

Woody
Woody GRM+ Memberand MegaDork
3/14/16 9:21 a.m.

Copied and paste'd

http://www.caranddriver.com/features/the-fast-show-speed-related-facts-milestones-and-minutiae-feature

Top-Speed Physics

Top speed is essentially a chess game. Your car achieves a stalemate when the power available at the drive wheels (A) equals the sum of the aerodynamic drag and all frictional losses (B = C + D). Line C is the power consumed by the wheel bearings and tires. Since frictional losses are nearly constant, the power consumed here is proportional to velocity. Curve D shows the power needed to overcome aero drag. The equation for this loss is D = ρ Cd A V^3 where ρ is air density, Cd is drag coefficient, A is frontal area, and V is the car's velocity. In the example below, shifting the power curve to the right with taller gearing would yield a higher top speed.

Flight Service
Flight Service MegaDork
3/14/16 9:25 a.m.
Knurled wrote:
Flight Service wrote: Shanghai maglev, 268 mph for about $20 Oh you mean cars.... Junkyard LS2/3 with cam and valves springs to get it over 500 in a late model C4 with a little aero work. Calculations say it should take about ~450 hp to hit the double century mark (0.33 cD and 19 soft frontal area.) That should do it.
IIRC a C4 requires about 650hp to break 200mph. That is one thing. The goal is 200mph trap speed in a standing mile. That needs a little bit more power than that. Upthead 1000hp was mentioned, that sounds about right since 1000hp in most cars will see 150mph trap speeds in the quarter mile. If you are going 150mph then you will travel 3/4 of a mile in 18 seconds. At 200mph you will travel 3/4mi in 13.5 seconds. 150-200mph acceleration in ~15 seconds is asking a lot.

The flying mile is a new qualification but the HP calculations I have are

end of series C4: drag coefficient: 0.330 frontal area: 19.00 sq/ft, (342 hp needed) rolling resistance assumption on the tires is .16 and weight is assumed to be 3200. (27 hp needed)

Comes out to about 369 on the ground HP. give 25% drivetrain losses and you get ~465 hp needed to get to 200. Now the gearing has to be set to let the motor generate the required power at the desired speed.

But that should get you to 200.000000000001 mph

Biggest issue is going to be gearing.

ProDarwin
ProDarwin PowerDork
3/14/16 10:10 a.m.

FWIW, the Callaway Sledgehammer C4 made 900hp and managed 254.8mph

I bet that factory 0.33 drag coefficient can be brought down relatively easily for a top speed run.

NOT A TA
NOT A TA Dork
3/14/16 10:19 a.m.

My cheapest way would be to "borrow" a more powerful engine for the car I ran at LSR's before and will again. Might not work out but this is actually my plan to try and hit 200.

bravenrace
bravenrace MegaDork
3/14/16 10:36 a.m.

chriswadsworth
chriswadsworth GRM+ Memberand New Reader
3/14/16 10:37 a.m.

I will second the C4 vette as well, seeing as it has been done many times but I think the 302 in the FB RX7 should be cheaper. Not exactly sure.

yupididit
yupididit HalfDork
3/14/16 10:42 a.m.

A depreciated Mercedes AMG + Renntech.

Or...S600 bi-turbo + Renntech.

EvanB
EvanB GRM+ Memberand UltimaDork
3/14/16 10:47 a.m.

A guy who rallycrosses with us occasionally has a twin turbo c5 built on a budget.

http://www.hotrod.com/news/202mph-with-a-stock-ls1-long-block/

He has since done 202mph at the Ohio Mile.

yupididit
yupididit HalfDork
3/14/16 10:49 a.m.

Man I shouldn't of looked at this thread...

This + This

Those gains.

alfadriver
alfadriver MegaDork
3/14/16 10:57 a.m.
Flight Service wrote:
alfadriver wrote: Seeing an Alfa do 230 mph, I would choose a Miata. With the cheap V8 swap, as was done in 2003 for the challenge. Fully MS treatment. I would think that body shape could do 200mph for just around 400 hp. For the bikers out there- you are brave. I knew a biker LSR. She was really good looking. Even with tubes running out of her after a big, big crash.
Your about 100 hp short.

So you think a Miata body has that much more drag than an Alfa? We did 198mph with a problematic turbo 2.0l with a bad belly pan.

Thinking about it more, I think it's possible to do an MS Turbo Miata and break 200mph.

The 2.0l TS doesn't even make 500hp and it does 230. The NA Miata is a great shape- should be easy.

Snrub
Snrub Reader
3/14/16 10:59 a.m.

A recent GRM issue had a 240sx as a land speed car. I think it or a FC RX-7 would be go good way to go. Low factory drag coefficient (.29FC, .31 240sx), low frontal area (5.95sqft FC, 5.88sqft 240sx), conducive shape and large engine bays would make them good candidates. https://en.wikipedia.org/wiki/Automobile_drag_coefficient

BTW: In the above list, a Miata has a .38 drag coefficient .01 better than the Ford Aerostar (clearly it was aptly named! ;) ).

alfadriver
alfadriver MegaDork
3/14/16 11:00 a.m.

This is what I'm talking about for a Miata.

1 2 3 4

You'll need to log in to post.

Our Preferred Partners
KSO4aYGCpvFoDhVpBo3jjGMBmE7nhkGcQrYmAP0uPNOLvik3R4BBzETkuDmv5COO