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just wondering what people here prefer in regards to spring rate. I know in the honda crowd americans prefer a rear biased suspension while the jdm style is front biased
For B13s, the front always has a higher spring rate. A popular rate is 300F/200R
For the B14/15, it's closer to equal, but people who have their beams bent to zero toe will need a lower rear spring rate than someone with the stock rear beam to get the same rotation characteristics.
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Climate Change skeptics are the new Flat Earth Society
why is the rate always higher in the front. i was under the impression that yes it depends on the car but it more depends on what handling characteristics you want. for instance the common logic would be to put higher rates up front where the weight is but i've read this is a misconception. any respones from auto-xers?
Rear rates on on a B13-15 are nearly 1:1. On the Honda they are not due to the shock/spring being mounted farther inward then the rear Strut/Beam on the B13-15. Comparing the two is not a good idea.
Last year we were running as high as 550F/1200R on our ITS B13 NX2k with the biggest available rear swaybar and virtually no front swaybar. This year we're fabricating our own rear swaybars and will probably drop that rear spring rate by half to start with.
Bottom line: take others' suggestions as a starting point, but nothing beats skidpad and track testing for tuning. - GA
Spring rates that Greg uses indicates a serious lack of torsional rigidity in the body of the car. Since the car is the spring, just weld the "suspension" to it.
The original Shelby Mustangs had this problem.
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Bruce in Houston
1990 Acura Legend LS, stock (so far)
1994 Nissan Sentra SE-R (original owner) w/ $tuff, converting to ITA (even more $tuff)
1998 Suzuki Bandit1200S w/ $tuff, W.W.B.O.C. #101
2002 Dodge Dakota tow beast, stock! RIP swwwinger
Even with an 8-point triangulated and welded rollcage, we still get lots of chassis flex in the B13. Problem is, the rules limit where we can attach bars to the chassis of the car, so we're stuck using the car itself as a spring...
really good replies guys thanks. i had not thought of some of the points made. am i correct then in inferring that b13's are much less rigid than honda/acura, or are they pretty much equal with the difference being their suspension placement in the rear?
Rear rates on on a B13-15 are nearly 1:1. On the Honda they are not due to the shock/spring being mounted farther inward then the rear Strut/Beam on the B13-15. Comparing the two is not a good idea.
I ran 650 rear/500 front before bending the beam, after bending and trailing arm bushings I went to 600 front and 500 rear due to the large amounts of oversteer that got produced by those two mods.
I will have 390 lb springs all around with my D2s, but I also bought an extra set of 500s for the rear. But, I wonder if they are the same lenght as the front. Then I could use them for the front also.
