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post #1 of 14 Old 03-08-2009, 12:19 PM Thread Starter
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My suspension setup

Front upr kmember control arms and CC plates.
450# springs coilovers, with adjustable competition engineering struts.
Rear Eibachs and CE adj shocks after market control arms.

In the front the struts don't feel like they are controling the spring. Is there a good budget strut that will work better.

I plan on a coil over kit for the rear and a panhard bar at some time. Haven't driven the car much only on the street and it seems to handle fine.

I am going to use it as a daily driver and some autox, maybe a lapping day here and there.

I guess my ? is what rate springs would be good in the rear to match the front suspension?

Thanks in advance
Mike


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post #2 of 14 Old 03-08-2009, 08:11 PM
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450 sure is alota srping....probably killing that Comp. damper. You're either looking at Koni Yellows or an MM valved Bilstein shock for that high rate spring.

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post #3 of 14 Old 03-08-2009, 11:37 PM
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Originally Posted by 2k2GT View Post
450 sure is alota srping....probably killing that Comp. damper. You're either looking at Koni Yellows or an MM valved Bilstein shock for that high rate spring.
Yep. a 450# coilover is equivalent to more than 1000 lb/in in the factory location.

The cheapest damper that can handle that much spring MAY me Tokiko Illuminas. I run those with a 425# coilover, but I'm moving to Konis ASAP...

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post #4 of 14 Old 03-09-2009, 01:10 AM
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I am not sure where I saw it, but the Konis may be reaching their damping limits right around 400lb. I am running 425 right now though, and they seem to be working ok. MM has some revalved bilsteins that would work with that specific rate. Neither strut though is what I would call budget.

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1998 Black GT (Open Track car) - TF 44cc Heads/Aviator SB, HP cams, BBK shorties, Delta Force tuning, MM Panhard LCA FCA Full subs CC plates coilovers, Koni Yellows, drop spindles, Brembo/Cobra brakes, 3.73 gears, truetrac diff
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post #5 of 14 Old 03-09-2009, 01:36 PM
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I've run Koni's with H&R Super Race's and not even on full stiff. You'd have no issue with Koni's damping those rates.

I'm well on record about the Bilstein vs. Koni thing. Makes no sense to me to spend that kind of coin to have damper you can't tune.

You drag dampers are just being flat overwhelmed by your springs. The point of your current struts and shocks is to let the body move easily, exactly what we don't want for control.

Budget? Well, currently Koni's are on sale for $564/set of 4 for Fox and SN95 cars. I don't think that's a bad amount at all, and it's not a lot more than than Tokico Illumina's which aren't as good. Frankly, given what you have for dampers and springs right now, just about ANYTHING would be better....

But the way I see it--if you settle for something mediocre you'll regret it down the road. Either the quality won't be as good or when the shock softens a bit it'll start to be overwhelmed too and you can't to anything to help it like you can with an adjustable unit meant for such a pupose.

And make no mistake the ride suffers too as the damping gets worse relative to the spring rate and height. So even on the street you see a difference with good shocks.

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post #6 of 14 Old 03-09-2009, 08:13 PM Thread Starter
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yeah I guess budget had gone out the window long ago.
I will have to check the springs when I pick the car from the shop this weekend just to make sure what rate they are.

Cheaper than VHT and works great.
So sticky it will practically pull your shoes off, just like the movie theater
floor..
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post #7 of 14 Old 03-10-2009, 09:35 PM
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I'm FAR from an expert, but I'm going to ask a question that hasn't come up yet. Why are you going with 450# springs up front? If the car is going to be primarily a DD, then some auto-x, and possibly a few OT events, I would look into a different spring rate. Whose coilover kit are you using? UPR?

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post #8 of 14 Old 03-10-2009, 09:41 PM Thread Starter
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I'm FAR from an expert, but I'm going to ask a question that hasn't come up yet. Why are you going with 450# springs up front? If the car is going to be primarily a DD, then some auto-x, and possibly a few OT events, I would look into a different spring rate. Whose coilover kit are you using? UPR?
Yeah the UPR.. I could be wrong on the rate though.. 450# just seemed to stick in my head. Engine should be in the car tomorrow and have it home this weekend then I will check the rate....

Cheaper than VHT and works great.
So sticky it will practically pull your shoes off, just like the movie theater
floor..
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post #9 of 14 Old 03-10-2009, 09:50 PM
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Yeah the UPR.. I could be wrong on the rate though.. 450# just seemed to stick in my head. Engine should be in the car tomorrow and have it home this weekend then I will check the rate....
450# coilovers is really stinkin' stiff -- even on a track car.

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post #10 of 14 Old 03-10-2009, 09:55 PM Thread Starter
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450# coilovers is really stinkin' stiff -- even on a track car.
They didn't seem that stiff when I was driving it before my engine melt down.
But I do drive a delivery truck all day long talk about stiff


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So sticky it will practically pull your shoes off, just like the movie theater
floor..
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post #11 of 14 Old 03-10-2009, 10:17 PM
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My $.02 is that if the springs are 450#, you should probably look into something more street friendly. If you drive a delivery truck you might not notice the harshness but those drag struts will. You need to get more input from others as to whether or not UPR's k-member and camber/caster plates are up to the stress of hard cornering, especially with a 450# rate.

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post #12 of 14 Old 03-10-2009, 10:36 PM Thread Starter
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Originally Posted by BULLITT1992 View Post
My $.02 is that if the springs are 450#, you should probably look into something more street friendly. If you drive a delivery truck you might not notice the harshness but those drag struts will. You need to get more input from others as to whether or not UPR's k-member and camber/caster plates are up to the stress of hard cornering, especially with a 450# rate.

I will run it till it breaks if it does.....
Or maybe I'll just set it up for drag and buy a Miata for AutoX they always seem to run really well..

Cheaper than VHT and works great.
So sticky it will practically pull your shoes off, just like the movie theater
floor..
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post #13 of 14 Old 03-10-2009, 11:35 PM
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I will run it till it breaks if it does.....
Or maybe I'll just set it up for drag and buy a Miata for AutoX they always seem to run really well..
Hopefully you'll be around to buy a miata if that k-member breaks..

I'd go with the Koni's Sam Strano recommended and/or step down to a lighter spring.. like a 325-350 with the S/As

thats my .02

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post #14 of 14 Old 03-11-2009, 06:13 AM Thread Starter
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Hopefully you'll be around to buy a miata if that k-member breaks..

I'd go with the Koni's Sam Strano recommended and/or step down to a lighter spring.. like a 325-350 with the S/As

thats my .02
Yeah that does sound good to me.
I'll keep an eye on the Kmember for any issues...

Cheaper than VHT and works great.
So sticky it will practically pull your shoes off, just like the movie theater
floor..
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