My old man just picked up a 99 Civic Coupe... He is planning some suspension modifications currently, and will probably be picking up some Ground Control sleeves + Koni yellows.


Coming from an EM2 driver, I know very little in regards to the motion ratios and suspension geometry of this older chassis.

What are commonly used spring rates(fr/r) with this particular setup? This will be a daily driver, but possibly see some track time(a la lapping days, HPDE).

Does anyone have the front/rear motion ratios on hand?

 

Well, when you order them they come pre-set spring rates i think, but I will quick google a good ratio for you, but in the time I do that, someone will probably answer it for ya!

 

Oh... I was under the impression most Ground Control combos came with whatever spring rate you want.

At least that was the case for my car.

 

well, they can, you just gotta ask I think.. I am at work, so excuse me for my lack of info right now.. i think i'll take a 15 min break and look for ya! haha just a minute...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JamesL &raquo;</TD></TR><TR><TD CLASS="quote">Oh... I was under the impression most Ground Control combos came with whatever spring rate you want.

At least that was the case for my car.</TD></TR></TABLE>

You can get whatever spring rate you want...depends on how hard or soft of a ride you like.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1995Civic &raquo;</TD></TR><TR><TD CLASS="quote">

You can get whatever spring rate you want...depends on how hard or soft of a ride you like. </TD></TR></TABLE>

Right, which is kind of what I was telling him, but what he is looking for is what a good spring rate would be for a daily driver.

 

10k/6k

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by donut. &raquo;</TD></TR><TR><TD CLASS="quote">10k/6k</TD></TR></TABLE>

This seems a little front biased.... Is this a common setup for this chassis?

 

Well, theres an answer for you, 10k/6k.

Otherwise, call up GC and they will give you the best answer!

I searched around and everyone says to call them.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JamesL &raquo;</TD></TR><TR><TD CLASS="quote">

This seems a little front biased.... Is this a common setup for this chassis?</TD></TR></TABLE>

thats exactly the point. you're not going to get a un-biased answer for the question you asked. everybody has a different opinion on comfortability. the only way you can get what you like is if you ride in 100 different cars with different setups.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by team_exceed &raquo;</TD></TR><TR><TD CLASS="quote">Otherwise, call up GC and they will give you the best answer!

I searched around and everyone says to call them. </TD></TR></TABLE>

That may very well be the best option

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by donut. &raquo;</TD></TR><TR><TD CLASS="quote">thats exactly the point. you're not going to get a un-biased answer for the question you asked. everybody has a different opinion on comfortability. the only way you can get what you like is if you ride in 100 different cars with different setups.</TD></TR></TABLE>


Of course everyone will have their own opinion about what works and what does not... but that doesn't mean that there isn't a "ballpark range" that would provide a good starting point.

I was simply questioning the front bias in the setup you suggested. From the sounds of it, that would understeer fairly badly....

Which was why I had asked if anyone knew the motion ratios of the front and rear suspesion for this chassis?

 

You can lose the front swaybar (if applicable) and opt for a rear swaybar, the best mod you can do, if you're going to road race which will promote more oversteer. theres more to understeer and oversteer than just spring rates and sway bars. 6k in the rear is comfortable and probably the lowest you should go in the rear. 7k would be even better which is what tein flex/jic flta2/etc come with. Then again, its all personal preference and driving style.


Modified by donut. at 10:58 AM 6/24/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by donut. &raquo;</TD></TR><TR><TD CLASS="quote"> theres more to understeer and oversteer than just spring rates and sway bars.
</TD></TR></TABLE>

I don't think anyone is arguing that there isn't.

 

lol well i never said you were. Im just laying down the facts because you were questioning my spring rate suggestion.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by donut. &raquo;</TD></TR><TR><TD CLASS="quote">You can lose the front swaybar (if applicable) and opt for a rear swaybar, the best mod you can do, if you're going to road race which will promote more oversteer. theres more to understeer and oversteer than just spring rates and sway bars. 6k in the rear is comfortable and probably the lowest you should go in the rear. 7k would be even better which is what tein flex/jic flta2/etc come with. Then again, its all personal preference and driving style.


Modified by donut. at 10:58 AM 6/24/2008</TD></TR></TABLE>

Agreed.

I've seen as low as 550/350...but thats just crazy IMO. I would say at least 550 in the rear would suffice. No need to go lower.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by donut. &raquo;</TD></TR><TR><TD CLASS="quote">lol well i never said you were. Im just laying down the facts because you were questioning my spring rate suggestion.</TD></TR></TABLE>

I guess it just looks so foreign to me to see such low rear rates in comparison to the fronts

Anyone else have any suggestions? Im thinking of maybe 550-600# fr/450-500# rr....

 

eggum racing springs.

problem solved.

 

Honda's are front heavy. I could have suggested my setup which is 14k/10k but can your old man handle it? i thought you wanted something along the lines of comfortable (hence daily driver) yet responsive. Since you can't have both and need to sacrafice one or the other, I gave you something in the "middle".

550-600lbs is roughly 10.5k
450-500lbs is roughly 8.5k

is there a suspension that come with those rates? you can get those rates through ground control and mate them with koni yellows but then again off the shelf koni's can only handle up to 500lbs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by donut. &raquo;</TD></TR><TR><TD CLASS="quote">Honda's are front heavy. I could have suggested my setup which is 14k/10k but can your old man handle it? i thought you wanted something along the lines of comfortable (hence daily driver) yet responsive. Since you can't have both and need to sacrafice one or the other, I gave you something in the "middle".

550-600lbs is roughly 10.5k
450-500lbs is roughly 8.5k

is there a suspension that come with those rates? you can get those rates through ground control and mate them with koni yellows but then again off the shelf koni's can only handle up to 500lbs.</TD></TR></TABLE>

He is coming from a track prepped suby with 1000#+ springs.... I think pretty much any setup is going to be more comfortable than his previous car. That thing was a nightmare.

 

I found motion ratios online of:

Fr: .666
Rr: .74

Does these sound accurate?

 

Bump

 

hey again! i think its like, the front should be 25% higher than the rear or something along those lines.
free bump for you!