Ground Control needs your Help

[RYU]

Thanks for your responses.

1. Cool thanks
2. You didn't answer me here though...
3. Water under the bridge. Good to know these don't make noise

[D1cker]

Originally Posted by RYU

Thanks for your responses.

1. Cool thanks
2. You didn't answer me here though...
3. Water under the bridge. Good to know these don't make noise

I'm running the GC kit on my car so I can answer about the noise and rates. There has been no clanking noise or any unpleasant noise at all.

My kit came with 6.6kg/mm front springs and 7.7kg/mm rear springs. I don't have any bounce or harshness in the suspension. My only issue is the rear end will bottom out over large bumps at high speeds, but that's due to the small amount of rear travel.

[GC_Adam]

Originally Posted by D1cker

I'm running the GC kit on my car so I can answer about the noise and rates. There has been no clanking noise or any unpleasant noise at all.

My kit came with 6.6kg/mm front springs and 7.7kg/mm rear springs. I don't have any bounce or harshness in the suspension. My only issue is the rear end will bottom out over large bumps at high speeds, but that's due to the small amount of rear travel.

Thanks Derek for answering Ryu's question after hours.

[RYU]

Originally Posted by GC_Adam

Thanks Derek for answering Ryu's question after hours.

So now that you're "on the clock" care to answer my question about if other rates are available?

Nevermind.. if you guys think running 4.5k is too soft then you've obviously done no testing for performance on the stock damper. You're probably putting a spring in there so stiff as to resist bottoming out due to the lack of compression travel.

That was a quick way to loose a customer. I was actually willing to give you guys another chance.

[phenom86]

Originally Posted by D1cker

I'm running the GC kit on my car so I can answer about the noise and rates. There has been no clanking noise or any unpleasant noise at all.

My kit came with 6.6kg/mm front springs and 7.7kg/mm rear springs. I don't have any bounce or harshness in the suspension. My only issue is the rear end will bottom out over large bumps at high speeds, but that's due to the small amount of rear travel.

my car is the same, love how it rides and its quiet also. my car is raked a bit cuz when i get riders in the back it wont bottom out plus im waiting for 19s to be put on my car

[GC_Adam]

From: The guy doing R and D on the FT86

Originally Posted by Jay from GC

Dear Ryu,

This started as a thread about some FT86 drivers helping Ground Control, and is now evolving into Ground Control helping FT86 drivers.

Your comments and assumptions help no one, including yourself.

Ground Control has extensively tested, evaluated, and retested every aspect of the FT86, including damping rates, geometry, and true wheel rates. The amount of time and energy devoted by GC and a few generous FT86 owner/drivers is already a direct rebuttal to your misconceptions.

I would like to thank Adam for the time he has invested, and he will be posting a few pics of the process.

One comment I would like to make, to the question that no one has asked yet: There is a specific reason why Ground Control refers to all springs by "pounds per inch", instead "kilograms per millimeter'. The reason is, we weigh the cars in pounds on a scale. We run our shock dyno in inches per second. We have tape measures that have big inch numbers and little mm numbers.

There is less chance for error when working with a simple, but familiar unit such as a pound and an inch. If working with mm and meter, kilogram and gram, all with a required decimal point that messes with the concept of "last significant figure", you can make a mistake more easily than with simpler units.

We do a lot of calculations, using inches per second from the dyno, pounds per inch from the springs, and inches per pound from the mass of the car. The simple units are MORE accurate, because there are no intermediate conversions.

If anyone has any questions, please email, Thank you.

[GC_Adam]

[RYU]

Originally Posted by GC_Adam

From: The guy doing R and D on the FT86
Originally Posted by Jay from GC
Dear Ryu,

This started as a thread about some FT86 drivers helping Ground Control, and is now evolving into Ground Control helping FT86 drivers.

Your comments and assumptions help no one, including yourself.

Ground Control has extensively tested, evaluated, and retested every aspect of the FT86, including damping rates, geometry, and true wheel rates. The amount of time and energy devoted by GC and a few generous FT86 owner/drivers is already a direct rebuttal to your misconceptions.

I would like to thank Adam for the time he has invested, and he will be posting a few pics of the process.

One comment I would like to make, to the question that no one has asked yet: There is a specific reason why Ground Control refers to all springs by "pounds per inch", instead "kilograms per millimeter'. The reason is, we weigh the cars in pounds on a scale. We run our shock dyno in inches per second. We have tape measures that have big inch numbers and little mm numbers.

There is less chance for error when working with a simple, but familiar unit such as a pound and an inch. If working with mm and meter, kilogram and gram, all with a required decimal point that messes with the concept of "last significant figure", you can make a mistake more easily than with simpler units.

We do a lot of calculations, using inches per second from the dyno, pounds per inch from the springs, and inches per pound from the mass of the car. The simple units are MORE accurate, because there are no intermediate conversions.

If anyone has any questions, please email, Thank you.

For Christ sake guys... Are you seriously using the conversion factor and your apparent difficulty in performing math an argument here? Would it have helped you if I asked my spring rate question in your terms? If so, then how about if I asked if you had rates available in 250-300lbs/in? Nevermind... Thought it was a very simply question at first. Apparently I was wrong.

In any event, This thread did help me. It helped me decide I do not want your products on my car even if simply for the backwards engineering that i've seen so far. I apologize for making the inquiry. Apparently it was of no use to anyone but myself.

*unsubscribing*

Have a great day!

[GC_Adam]

[GC_Adam]

Front FT86 strut and upper mount being tested on our in house shock dyno for deflection of the upper mount.

[gmookher]

ordering a set of these full on with koni's...

[_F-R-S_]

Friend has these on civic and does mothi g but say how i need to get these for my car,.. Cant wait for furthur info great starting spring rate..

[gmookher]

6.6kg/mm front and 7.7kg/mm rear which translates to around a 375lb front spring and a 430lb rear spring

grip bias, not drift.