Suspension and Brakes Springs, shocks, coilovers, sways, braces, brakes, etc.

BC vs Megan lp spring rate

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Old 07-30-13, 11:33 AM
  #31  
An2ny
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Originally Posted by scorpionge
Im running 16k/11k on k-sport coils and find the rears travel too much,

so Im thinking of putting 20k in the rear or

putting 20k front 16k rear
Wow 20K springs? That is about 1,120lb/in and 16K is ~896lb/in that sounds like a lot…if you are using close to stock sizes with high performance street tires, I cannot believe that the car generates enough body roll to justify those rates, but I could be wrong...Or the theory behind these rates is to be able to lower the car a lot and don’t bottom out however has nothing to do with handling?

Does anyone know the motion ratio for the IS250/350? I cannot find anything online.
Old 07-30-13, 05:02 PM
  #32  
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Originally Posted by iRyan
I have 12/10 on my BC and honestly I love it. It's great in Florida for all conditions...not bouncy not too stiff N perfect for doing 100 on the highway. My boy has 14/10 N his drive pretty great as well. I think 10/8 is way too soft
im actually lowkey wishing i had went with the 12/10 spring rates at least for how low i plan on going vs just getting the standard 10/8.

i have no issues now but when i slam the car i can see bottoming out becoming an issue
Old 09-04-13, 12:34 AM
  #33  
smnlive
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Default why wait for new sway

Originally Posted by Gville350
Why do you assume a stiffer spring rate in the rear is better for drag racing? Its in fact the opposite. I went with BCRs and drag race a good amount each year at the local 1/8th mile. I find myself dropping down the dampening from a DD rate of 12-15 to between 5 - 8 clicks up from 0 with my 8k rear spring rate (12k up front). If I had to do it again though I would have went with 14/10, but I'm still on stock sways. I do plan to get both bars once finances allow.

Either way, you cannot lose with BCRs; I love mine!
Why would you upgrade to 14/10 after new sways? Just curious b/c I just ordered 14/10 and I'll be riding on stock sway.
Old 09-04-13, 12:35 AM
  #34  
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Default rear tires

Originally Posted by rayac88
honestly you could do 14/10 my rears never rub and i have them pretty soft. Something like 12 clicks from softest. sffd has 8k on his rears i believe so hit him up too. you could have just texted me. im growing fond of this 12k 10k at first it was too stiff for my liking but once i broke it in a bit it has gotten better.
im this low now and i used camber arm to give me more positive camber. i'm at 2 degrees, without the camber arms i think you would be at 3- 3.5 degrees which shouldn't rub. all i had to do was a roll. my fronts rub on the liner though.you still going to run the concavo's?
what tires are you running in the back?
Old 09-04-13, 01:07 AM
  #35  
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Originally Posted by rayac88
honestly you could do 14/10 my rears never rub and i have them pretty soft. Something like 12 clicks from softest. sffd has 8k on his rears i believe so hit him up too. you could have just texted me. im growing fond of this 12k 10k at first it was too stiff for my liking but once i broke it in a bit it has gotten better.
im this low now and i used camber arm to give me more positive camber. i'm at 2 degrees, without the camber arms i think you would be at 3- 3.5 degrees which shouldn't rub. all i had to do was a roll. my fronts rub on the liner though.you still going to run the concavo's?
what tires are you running in the back?
Old 09-09-13, 07:54 AM
  #36  
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Originally Posted by smnlive
Quote:

Originally Posted by rayac88

honestly you could do 14/10 my rears never rub and i have them pretty soft. Something like 12 clicks from softest. sffd has 8k on his rears i believe so hit him up too. you could have just texted me. im growing fond of this 12k 10k at first it was too stiff for my liking but once i broke it in a bit it has gotten better.
im this low now and i used camber arm to give me more positive camber. i'm at 2 degrees, without the camber arms i think you would be at 3- 3.5 degrees which shouldn't rub. all i had to do was a roll. my fronts rub on the liner though.you still going to run the concavo's?

what tires are you running in the back?
255/30 v12 hankook on a 10" rim low 30s offset



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