Motorsport_TC

As you know Megan Racing has decided to design a set of Street Coilovers for the Scion TC. Megan would like to know what kind of Front and Rear spring rates the TC community would like to see in a coilover setup. This is the TC community's chance to tell a manufacterer what type of springrates we would like to see and help out in the development of the coilovers instead of being stuck with the other coilover springrates out there. So it would be great if the TC community could give any Front and Rear Spring Rate suggestions.

Thanks

Motorsport_TC

I was talking to RaamAudio about spring rates and he said that tein SS's run 7K front and 10K rear, he told me the rear seem to be pretty stiff and an optimal street setting to slightly understeer would be 7K front and 7K rear, but optimally he has told me he would like to try out a 7K front and 9K rear , I agree with him to as I would like a mild oversteer or more neutral handling car

hahaitzskippy

i dnno how the car will react with a spring rate lik that 7F/7R

all the other companies out there that has made suspension for the TC so far as been making the rear stiffer. maybe with the exception of B+G but my information is still pending for an absolute answer.

yes i believe the 10R from the TEIN SS is way stiff. so might the 7F.

progress 4F/6R (from wat i hear)
tanabe 6F/8R
tein basic/ss 7F/10R

maybe not exact information but i tink im pretty accurate

7F/9R sounds good to me. a lot also depends on teh shock bound/rebound force

boostedscion

that sounds good to me as well... good input Skippy

dstyle

i think 7/9 would be good too. but it also depends on how well the damper itself is too.

lo_bux_racer

No, actually it all depends on how low you are going to put the car because the springs are the first line of defense against body roll.

The Teins are very stiff because they specify a lot of drop. This makes a really long roll couple, so you need a lot of spring rate to counter the roll.

You can't just pick spring rates without taking the entire suspension geometry into consideration, and the amount of work to determine the optimum spring rates for a given suspension isn't something you'll want to do in your spare time.

Motorsport_TC

I didn't get into the exact specifics of what raamaudio was telling me but was just by what his advice was for "his setup" I really don't plan on dropping the car more then 1.5-1.75 as I don't want a slammed car and from raamaudios findings he has said that any larger of a drop will decrease handling.

boostedscion

yea.. I wouldn't plan to drop any more than 1.5

hahaitzskippy

springs act against body roll

so does shock bound/rebound

raamaudio

I would love to have a test facility, enough time and several cars setup the same except spring rates so I could come up with the best answer for all situations. Ours will not likely be the best for many others due to what the car is being used for.

In general I have always prefered springs a bit on the softer side(not soft compared to stock) and stiffer shocks. Springs that are to stiff can lead to loss of contact with the road surface which of course means loss of grip, not good on fast turn to hit a bump and lose grip.



Tuning shocks is usefull for weight transfer, how fast it transfers mainly.

Sway bar tuning for roll resistance is inportant, it can effect weigth transfer a fair amount as well.

Springs for roll resistance and chassis balance and maintain contact with the roas surface.

There really is no single solution for every situation.

The more I learn about all this, the less it seems I know, lol!

Overall, I would go with a moderately stiffer spring setup, fairly stiff shocks and a much stiffer rear sway bar and a front strut bar.

No matter what coilovers you go with, take it easy on the slammed look as the suspension geometry is severly effected in a bad way, degraded handling, harsher ride, long term wear and tear are all part of the results you will recieve.



Rick

lo_bux_racer

compression and rebound damping are there to control spring motion, not counter roll. Springs and sways are what counter body roll effectively. Using damping to influence roll only works during transitions. Once the chassis takes a set, damping means nothing.

raamaudio

Well put

Not sure if you saw my message, have Camry steering knuckles sitting in the shop waiting for me to have some time to check them out;)

Rick

boostedscion

so when is the final answer going to be reported to Megan?

corpan32

So are the coilovers in production now?

Motorsport_TC

no they would take apporximately 45 days to develop as Steve has said and another 45 days before production units are out. I will update you guys after I have received them and give you a full review

corpan32

Thanks for the update.

boostedscion

wow.. so we are looking at February to March of 2006?

tcholic

woooOOoo let me know when there done kev....

atodak

just in time for tax returns

hahaitzskippy

come on megan, wheres the development going :D

lets kick it up a notch :D