If i dont have a speed limiter in my car...what can my top speed be?

[crab]

My vans limiter is at 95...doesnt feel too bad there, either...but I think I'll keep the limiter anyway

 

[MercenaryForHire]

Originally posted by: gregshin
thats pretty crazy...althought i was driving one handed and using the other hand to monitor my LCD readout which are displayed real time.

DANGER TO MANIFOLD!!!

- M4H

 

You are going to blow the welds on your manifold using nitrous oxide.

HAHAHAHAHAHAHAHAHAHA

 

[Demon-Xanth]

A little tidbit:
The Lamborghini Diablo orignally did not have a wing. It was added for styling as it was requested by many people. Why did they leave out this item? Without the wing, the top speed was 9MPH higher.

 

[Quixfire]

mph = (rpm x tire diameter) / (gear ratio x 336) is the formula for determining the top speed of a vehicle. This doesn't factor in friction or wind resistance, so I would take this and reduce it by 20% to get a more real world number.

 

[MercenaryForHire]

Originally posted by: Roger
You are going to blow the welds on your manifold using nitrous oxide.

HAHAHAHAHAHAHAHAHAHA

Not if he double-clutches and uses titanium valve caps!

Shut up! SHUT UP! *slams lid of laptop*

- M4H

 

[Titan]

all depends on the car. Remember the batmobile on steroids they used to break the sound barrier on land with? Of course it had 2 jet engines.

 

[Rumpltzer]

Originally posted by: AsianriceX
Depends on either your gearing, drag coefficient, or your tires. They can all limit your top speed. If your gearing is limiting, you'll hit redline on your last gear and that would be the limit. If your car is limited by drag, your engine can't provide enough force to overcome wind resistence. If your car is limited by your tires, the tires will probably blow up before you get to your top speed. They make different rated tires for different speeds.

I know there are different ratings for tires, but I've never given it a lot of thought.

They really blow up?? Is that true? Why do they blow up? From the heat or the pressure build up? Even at short distances?

Or, do you mean they throw their threads? That I can probably understand, but blowing up is hard for me to figure out.

 

[Vic]

Originally posted by: gregshin
1998 Nissan 240sx SR20DET
T-28 stock turbo 370cc stock injectors
Apex-i Power FC w/Commander
Apex-i Boost Controller
Greddy VSPL FMIC
Greddy PE2 exhaust
Blitz downpipe
Blitz DD BOV
Blitz dual timer
HKS Powerflo airfilter
Denso Toyota Supra fuel pump
SVR drycell battery
H & R track spring
KYB AGX short stroke adjustable shox
Pilot STB
Work Wheels Japan Maximer 18x8 18x9
235/40 265/35 Bridgestone Potenza S-03's Fronts and Yokohama AVS Sports Rears
300zx brake kit

Nice.

Give me the top gear ratio, final drive ratio, engine redline (I assume 7k), and peak hp and tq numbers (or dyno chart), and I could give you a very close approximation.
His tires are Y and W rated (respectively), so those are not a limitation.

If you've already hit 153mph, I'm gonna say that's probably pretty close to the fastest you'll get, and is pretty damn impressive in itself. Nice as your 240 is, it's not a supercar.

 

[Demon-Xanth]

This chart will tell you the speeds of various gears given the right ratios. Fill in the yellow boxes with your car's info. http://mspencer.net/Demon-Xanth/calculations.xls

 

[JulesMaximus]

Originally posted by: Roger
If you do have a speed limiter, most of them can be shut off using a power programmer.

Is that how you got your VW bus up to 110?

 

[Shawn]

Hmm.... I wonder what my top speed is. I think I was doing around 5500rpm at 115mph in 5th gear. My rev limiter is at 7700rpm. Think I could hit 130?

 

[Shawn]

Originally posted by: Demon-Xanth
This chart will tell you the speeds of various gears given the right ratios. Fill in the yellow boxes with your car's info. http://mspencer.net/Demon-Xanth/calculations.xls

wow, that's cool as hell. I filled all that out and it said my car would redline at 149.31mph! :Q I dunno how accurate that is but at 5500rpm it said 114.06 which seems correct. awesome.

 

[OrganizedChaos]

Originally posted by: Roger
You are going to blow the welds on your manifold using nitrous oxide.

HAHAHAHAHAHAHAHAHAHA

i've seen that happen twice before. I was at new england dragway and there was a r1 doing high 9s without n20. on his last run he opened up the n20 and got about 200ft when he had a backfire thru the intake. baboom, parts all over the place.

also saw a mustang there(mostly fiberglass, barely anything left of it) that got about 2 feet off the line boom. scared the sh!t out of the guy on the tree.

 

[Demon-Xanth]

Originally posted by: iloveme2

Originally posted by: Demon-Xanth
This chart will tell you the speeds of various gears given the right ratios. Fill in the yellow boxes with your car's info. http://mspencer.net/Demon-Xanth/calculations.xls

wow, that's cool as hell. I filled all that out and it said my car would redline at 149.31mph! :Q I dunno how accurate that is but at 5500rpm it said 114.06 which seems correct. awesome.

All it is is straight math. Any inaccuracies are due to tire flex and rounding errors. (ie: 2:3 becomes 0.666...:1)

 

[LeadMagnet]

30000000 meters per second or 176000 miles per second?

 

[Demon-Xanth]

LeadMagnet: Is your car in a vacuum?

 

[LeadMagnet]

Originally posted by: Demon-Xanth
LeadMagnet: Is your car in a vacuum?

Maximum Vacuum - nothing can suck harder than that.