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  #16  
Old 10-10-2006, 01:13 PM
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Quote:
Originally Posted by Earthworm
I have reached 155mph/250kph according to the speedometer with the 5MT. With the 4EAT I could only reach 136mph/220kph.
I too have reached 155mph in the SVX... This was 3 years ago when I was alot more careless than I am now... But I will say, it was still accelerating and probably would have reached around 165mph had I let it climb all the way to fuel cut...

Do a search... This had been discussed alot in the past...
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  #17  
Old 10-10-2006, 06:20 PM
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  #18  
Old 10-10-2006, 11:54 PM
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Quote:
Originally Posted by Mr. Pockets
If I remember correctly, the highest top speed (recorded by something other than the car's speedometer) was Sonar at 164.4mph. That was measured by radar, and was some sort of high-speed event on a closed road.

Honestly, your speedometer could be off by as much as 10%. Above an indicated 100mph, that's a lot. If you're not measuring your speed with GPS, radar or other timing equipment besides the speedometer, you really don't know how fast you were going.
Bro! The Autobahn speedometer pic was confirmed by two Porsches following the SVX. They both confirmed that our babe topped 172mph!!

I wish somebody here still have that picture of the SVX between the two Porsches... That would confirm that Sonar's record was beaten!
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  #19  
Old 10-11-2006, 03:10 AM
NeedForSpeed NeedForSpeed is offline
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That's it, lock the thread!!! My teen Jon wants a 5MT in his car.

No worries, he doesn't read these threads. Interesting though, that much difference in speed.

thanks for posting

Quote:
Originally Posted by Earthworm
I have reached 155mph/250kph according to the speedometer with the 5MT. With the 4EAT I could only reach 136mph/220kph.
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  #20  
Old 10-11-2006, 03:13 AM
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Danny, I believe you. Your car came without cats, and probably the best tune in any market. 172 mph, on that high octane Autobahn fuel, I think 101 octane when I was in Germany last summer.

Quote:
Originally Posted by SilverSpear
Bro! The Autobahn speedometer pic was confirmed by two Porsches following the SVX. They both confirmed that our babe topped 172mph!!

I wish somebody here still have that picture of the SVX between the two Porsches... That would confirm that Sonar's record was beaten!
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  #21  
Old 10-11-2006, 03:28 AM
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I would post an answer but most of you should know how fast my car is capable of.. That is before 1 thread was locked, and one thread was deleted.
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  #22  
Old 10-11-2006, 04:21 AM
ItsPeteReally ItsPeteReally is offline
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Whilst not calling anybody a liar, some of the claims made need to be examined in the light of the following real world empirically derived formula, which ignores rolling resistance and other parasitic losses.


Power = 8.702 x 10**(-6) x Cd x A x V**3

where Cd = coefficient of drag
A = square feet of frontal area of the vehicle
V = Velocity, in miles per hour



Code:
Speed    Power Required
m.p.h     Horsepower

 30	     1.6
 40	     3.9
 50	     7.6
 60	    13.2
 70	    21.0
 80	    31.4
 90	    44.8
100	    61.4
110	    81.7
120	   106.1
130	   135.0
140	   168.6
150	   207.4
160	   251.7
170	   301.9


Whilst the figures above are purely theoretical, they do appear to align fairly well with published road test figures. Claims of a standard car exceeding 150m.p.h. by more than a couple of miles per hour would seem to indicate either the assistance of a stiff tailwind or a downhill test track.

Conversely, it shows that an SVX that cannot exceed 130 mph is really severely out of tune.
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  #23  
Old 10-11-2006, 05:05 AM
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Ever here of Gear Ratio's? My car wont go over 140MPH You going to tell me I'm only making 135hp? Also the equation doesnt say anything about disance. Is that speed in a standing mile or top speed? With enough distance and the right gearing I believe the speeds are possible.




Quote:
Originally Posted by ItsPeteReally
Whilst not calling anybody a liar, some of the claims made need to be examined in the light of the following real world empirically derived formula, which ignores rolling resistance and other parasitic losses.


Power = 8.702 x 10**(-6) x Cd x A x V**3

where Cd = coefficient of drag
A = square feet of frontal area of the vehicle
V = Velocity, in miles per hour



Code:
Speed    Power Required
m.p.h     Horsepower

 30	     1.6
 40	     3.9
 50	     7.6
 60	    13.2
 70	    21.0
 80	    31.4
 90	    44.8
100	    61.4
110	    81.7
120	   106.1
130	   135.0
140	   168.6
150	   207.4
160	   251.7
170	   301.9


Whilst the figures above are purely theoretical, they do appear to align fairly well with published road test figures. Claims of a standard car exceeding 150m.p.h. by more than a couple of miles per hour would seem to indicate either the assistance of a stiff tailwind or a downhill test track.

Conversely, it shows that an SVX that cannot exceed 130 mph is really severely out of tune.
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  #24  
Old 10-11-2006, 05:40 AM
dcarrb dcarrb is offline
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Distance and gearing matter little. Wind-up ANY car on the Bonneville Salt Flats, with any gear ratio, and top speed will hit the wall when it runs out of horsepower. Keep running flat-out for the rest of the day, if you want, but you won't go one bit faster unless you pick-up a tailwind.

Somebody calculated that an SVX with stock gearing, in fourth gear, would be doing close to 200 mph at redline. Thing is, it doesn't have the muscle to get to get there. (If it did, surely there would be fewer on the road today.)

dcb
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  #25  
Old 10-11-2006, 05:50 AM
ItsPeteReally ItsPeteReally is offline
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Quote:
Ever here of Gear Ratio's? My car wont go over 140MPH You going to tell me I'm only making 135hp? Also the equation doesnt say anything about disance. Is that speed in a standing mile or top speed? With enough distance and the right gearing I believe the speeds are possible.
Ever here of Gear Ratio's? Of course I've heard of gear ratios. The optimum gear ratio would be the one that allows the engine to run at the power peak (5,400 rpm) at maximum speed, the 3.70 final drive in the JDM, Euro, and Australian markets is pretty close to the optimum.

You going to tell me I'm only making 135hp? - Yes, I am (or pretty close to that) at the wheels, not at the flywheel. Your engine will only be turning over at around 4,500 rpm at 135 mph (if you have a 3.54 final drive) and will not be developing peak power.

Also the equation doesnt say anything about disance. Is that speed in a standing mile or top speed? Its just speed. Not top speed. It's just a measure of how much power you need just to push the air out of the way at any given speed.

With enough distance and the right gearing I believe the speeds are possible. I believe that 150 mph or so is about the maximum you will be likely to see.
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  #26  
Old 10-11-2006, 07:03 AM
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Guys, the German guy had the australian chip on....
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  #27  
Old 10-11-2006, 07:16 AM
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Quote:
Originally Posted by NeedForSpeed
Danny, I believe you. Your car came without cats, and probably the best tune in any market. 172 mph, on that high octane Autobahn fuel, I think 101 octane when I was in Germany last summer.
Ron, my car is different than the German guy's. I have never dared to try my car on high speeds, roads here are very surprising in their potholes... the outmost I did was 220Km/h...

Concerning my car model, I am suspecting that Stage 1 LAN chip is not working properly on my ECU, I mean that it is not suitable for my no cats model, I am having somehow a bad mileage. I was wondering can I add a piggyback fuel management system on my ECU?? (sorry I know nothing about where to install it, to which plug and how it can be connected on my ECU...)
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  #28  
Old 10-11-2006, 07:47 AM
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Quote:
Originally Posted by SilverSpear
Bro! The Autobahn speedometer pic was confirmed by two Porsches following the SVX. They both confirmed that our babe topped 172mph!!

I wish somebody here still have that picture of the SVX between the two Porsches... That would confirm that Sonar's record was beaten!
I don't really care. Weren't you reading? I said speedometers aren't accurate to begin with. I don't care if they have a Subaru or Porsche logo on them, they're still relative crap.

Besides that, if the speedometer in the car isn't that accurate, why would you think speedometers not attached to the car would be any better?

Besides that, the 'autobahn' pic shows a speedometer that's pegged. It's gone past the measurements the thing can even 'guess' at. How can you possibly accept that it's proof of anything?
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  #29  
Old 10-11-2006, 07:50 AM
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Quote:
Originally Posted by ItsPeteReally
Whilst the figures above are purely theoretical, they do appear to align fairly well with published road test figures. Claims of a standard car exceeding 150m.p.h. by more than a couple of miles per hour would seem to indicate either the assistance of a stiff tailwind or a downhill test track.
Thank you for making some sense.

What did you use for Cd?
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  #30  
Old 10-11-2006, 08:13 AM
ItsPeteReally ItsPeteReally is offline
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Quote:
Originally Posted by Mr. Pockets
Thank you for making some sense.

What did you use for Cd?
I used the 0.285 of the Euro car, but if I had used the 0.29 of the US variant it would have made very little difference.
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