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Old 11-05-2013, 10:42 PM   #11
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With lowering the car will help when it comes to high speed. Also with about 300whp you can too out the focus. It will take some time but if you do it on a closed track you are fine.
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Old 11-05-2013, 11:14 PM   #12
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The Texas Mile does follow recommended safety protocol of LSR --> http://www.texasmile.net/pdf/TexasMi...-2-Edition.pdf

due note that EVERY car needs a roll bar.
'Street car' can be used pretty loosely here.



The thing you'll find very quickly is that RPM will be your friend,

https://docs.google.com/spreadsheet/...Wc&usp=sharing

Play around and you'll see what I mean.
I raised my limiter to 8,500rpm for this very reason. In the 1/4 mile I had to shift to 4th and every time I'd loose 3/10ths.
Plus the less you have to shift you gain the advantage of the TQ multiplication of the gear ratios. If you can avoid 5th you really want to ... and you also have to factor into your math that 5th is below a 1:1 ratio. meaning that you have to multiply your expected power by that factor to recoup losses.

And speedometers be damned.
There's a reason all top speed runs are timed and not based on a speedo or GPS.
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Old 11-06-2013, 11:45 AM   #13
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Quote:
Originally Posted by turbosvtfocus04 View Post
With lowering the car will help when it comes to high speed. Also with about 300whp you can too out the focus. It will take some time but if you do it on a closed track you are fine.



Also, lowering a car will NOT help with speed. You still have the same coefficient of drag.
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Old 11-06-2013, 12:01 PM   #14
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Quote:
Originally Posted by ViperThreat View Post
Also, lowering a car will NOT help with speed. You still have the same coefficient of drag.
I'm trying to wrap my head around this but why wouldn't a lower ride height be advantageous to a top speed? Not sure how measurable this is but wouldn't a lower car decrease the area of the tires exposed? I doubt this will have any effect on regular driving but perhaps at a top speed scenario it may be the difference of a tenth or hundredth of an mph lol

At least the lower/stiffer springs/shocks should provide some improved stability at those speeds. I bet alignment for those speeds is super important too
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Old 11-06-2013, 12:11 PM   #15
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Quote:
Originally Posted by rambleon84 View Post
I'm trying to wrap my head around this but why wouldn't a lower ride height be advantageous to a top speed? Not sure how measurable this is but wouldn't a lower car decrease the area of the tires exposed? I doubt this will have any effect on regular driving but perhaps at a top speed scenario it may be the difference of a tenth or hundredth of an mph lol

At least the lower/stiffer springs/shocks should provide some improved stability at those speeds. I bet alignment for those speeds is super important too

Lowering a car will definitely help with the stability, however it wont make any difference in terms of drag. Basically, air hitting the center of the front bumper has 4 different paths to take. Up, Down, Left, or Right. Air will follow the path of least resistance, which in some-cases is down. The less room there is under the car for air-flow, the more of a vacuum it creates, which increases down-force on the car, which in turn helps improve stability. Either way though, you are fighting the balance of stability over drag.
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Old 11-06-2013, 01:09 PM   #16
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Lowers center of gravity.
You are acting as if there is so much drag that you will up lift or lose control after 100mph. Quit over thinking it.
I've gone 150mph in my svt. Stock suspension(obviously a little stiffer and lower than regular non svt suspension) guess what, no shakes, no losing control, nothing.
If your wheel is shaking after a certain speed, now you have a wheel balance issue or alignment issue.
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Old 11-06-2013, 01:21 PM   #17
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Quote:
Originally Posted by turbosvtfocus04 View Post
Lowers center of gravity.
You are acting as if there is so much drag that you will up lift or lose control after 100mph. Quit over thinking it.
I've gone 150mph in my svt. Stock suspension(obviously a little stiffer and lower than regular non svt suspension) guess what, no shakes, no losing control, nothing.
If your wheel is shaking after a certain speed, now you have a wheel balance issue or alignment issue.
I'm not over-thinking it. I spent 4 years in school for aerospace engineering. Aerodynamics are kind of my thing.


Ive been up to 140 in my SVT as well. I can assure you that it is nowhere near as stable as 140 in a BMW or Corvette.
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Old 11-06-2013, 01:28 PM   #18
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Cool story bro.

Of course comparing a completely different car that is made to go 200mph will
Handle better at high speeds. Maybe you can compare a focus to a formula 1. Lol

And yes my car was very stable. It was more stable than my srt4 was.
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Old 11-06-2013, 01:51 PM   #19
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Lowering the car will help top speed. See the first post of this thread and the equation. Notice the words "frontal area". Lowering the car lowers the effective frontal area.
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Old 11-06-2013, 01:57 PM   #20
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Quote:
Originally Posted by teamDFL View Post
Notice the words "frontal area". Lowering the car lowers the effective frontal area.




Yes, because making the car lower to the ground somehow changes the shape of the car.



Edit.. nvm. not worth my time lol
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