Evo Kinematic data
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From: Nedvedice
Evo Kinematic data
Hi Evo Enthusiasts!
I want prepare for my friend racing Evo 8,but I need get some kinematic data for car dynamic behavior analysis
Roll center heights
Bumpsteer values
Camber gain values
Dampers and springs movement ratios
Thank You for help!
Radek
I want prepare for my friend racing Evo 8,but I need get some kinematic data for car dynamic behavior analysis
Roll center heights
Bumpsteer values
Camber gain values
Dampers and springs movement ratios
Thank You for help!
Radek
.
Sure you can. It just takes more experimentation. Which has been done by a lot of people.
If you know enough to put that information to use, you know enough to accurately measure it..
If you know enough to put that information to use, you know enough to accurately measure it..
Thread Starter
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From: Nedvedice
No letsgetthisdone,
experimantation way really not effective.............and Yes, but in this time this car not available for me
EVOizmm,
for someone who does not want to be beaten only some 300hp FWD car
You believe,
worth it !
experimantation way really not effective.............and Yes, but in this time this car not available for me
EVOizmm,
for someone who does not want to be beaten only some 300hp FWD car
You believe,
worth it !
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Fast setups have already been found for the evo. Keep rear springs 20-30% stiffer than the front, use appropriate springs for tires and track conditions. Run a ride height that is close to level, not raked (lower in the front), and keep the rear lower arm at a down ward angle towards the tire. A good rear diff, and ACD tune are also key.
My car doesn't push. Unless on throttle, but also not in boost. As long as it's in boost, it rotates or plain oversteers. It rotates nicely off throttle. You are over complicating setting up a car for which people have well documented what a good setup is..
My car doesn't push. Unless on throttle, but also not in boost. As long as it's in boost, it rotates or plain oversteers. It rotates nicely off throttle. You are over complicating setting up a car for which people have well documented what a good setup is..
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From: Nedvedice
Thank You, but sorry, "Keep rear springs 20-30% stiffer than the front" or "and keep the rear lower arm at a down ward angle towards the tire" really not sufficient for real 650Hp/ 950kg EVO8 racing setup, because depends on weight distribution,wheel diameter etc.etc.etc.
You have some Your car video?
You have some Your car video?
No, I don't.
I hope you're running big brakes and aero on that car. Also, I'm not sure how you made the care weigh 2100lbs. This is starting to get highly questionable. You're building a 650hp 2100lb track car but don't want to measure these things your self?
Also, roll center depends on the ride height, especially up front. It sounds like you have a lot of work to do having never taken one of these to the track, and just jumping into with a car that with a very low power to weight ratio. I'm still doubting the weight. Even the most gutted and cut up drag cars barely weigh that, and they are flexible at best..
And once again, plenty of people have gone plenty fast with out knowing these things. If you search around you will find good baseline alignment setting depending on the tire you're running. A good suspension setup can be had from several shops that build these cars. From there, on track testing will be needed with or without knowing what you think you need to know..
I hope you're running big brakes and aero on that car. Also, I'm not sure how you made the care weigh 2100lbs. This is starting to get highly questionable. You're building a 650hp 2100lb track car but don't want to measure these things your self?
Also, roll center depends on the ride height, especially up front. It sounds like you have a lot of work to do having never taken one of these to the track, and just jumping into with a car that with a very low power to weight ratio. I'm still doubting the weight. Even the most gutted and cut up drag cars barely weigh that, and they are flexible at best..
And once again, plenty of people have gone plenty fast with out knowing these things. If you search around you will find good baseline alignment setting depending on the tire you're running. A good suspension setup can be had from several shops that build these cars. From there, on track testing will be needed with or without knowing what you think you need to know..
Last edited by letsgetthisdone; Aug 12, 2015 at 04:52 PM.
Thread Starter
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From: Nedvedice
No,is not my car, and I not build this.......car already exist........is very fast
but I know can be faster
in this time can not be measure............therefore I try get this stock Evo data........this all
but I know can be faster
in this time can not be measure............therefore I try get this stock Evo data........this all
As pointed out, the roll center height isn't a very useful number to have. You really need the whole suspension geometry. Even then, you're very limited in what you can actually do with it unless you're actually designing your own suspension components and/or changing various pickup points. And if you're doing any of that, you would have to measure all of the relevant geometries in the first place.
So instead of searching for numbers and posting strange videos from 2009, why don't go back to:
What is it that you hope to achieve with these numbers? Specifically, that is.
Agreed: This request and some of the data seem very strange.
As pointed out, the roll center height isn't a very useful number to have. You really need the whole suspension geometry. Even then, you're very limited in what you can actually do with it unless you're actually designing your own suspension components and/or changing various pickup points. And if you're doing any of that, you would have to measure all of the relevant geometries in the first place.
So instead of searching for numbers and posting strange videos from 2009, why don't go back to:
What is it that you hope to achieve with these numbers? Specifically, that is.
As pointed out, the roll center height isn't a very useful number to have. You really need the whole suspension geometry. Even then, you're very limited in what you can actually do with it unless you're actually designing your own suspension components and/or changing various pickup points. And if you're doing any of that, you would have to measure all of the relevant geometries in the first place.
So instead of searching for numbers and posting strange videos from 2009, why don't go back to:
What is it that you hope to achieve with these numbers? Specifically, that is.
He wants to eliminate understeer....lol
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From: Nedvedice
Yes,
of course,
camber gain, bumpsteer, roll center height etc. are key data important affect on car dynamic behavior
motion ratios necessary for spring/damper tuning
what strange? 650Hp turbo? or 950 kg tubular chassis?
of course,
camber gain, bumpsteer, roll center height etc. are key data important affect on car dynamic behavior
motion ratios necessary for spring/damper tuning
what strange? 650Hp turbo? or 950 kg tubular chassis?
you said you have an evo 8. a tube chassis is not an Evo, and if someone builts tube chassis without optimizing suspension geometry for the size tire to be run on the car, the should be back handed, repeatedly.
Last edited by letsgetthisdone; Aug 14, 2015 at 08:25 AM.