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Learning how to build Lotus Seven replicas...together!
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 Post subject: Re: spring rates
PostPosted: February 12, 2018, 1:08 am 
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Joined: April 26, 2008, 6:06 pm
Posts: 2956
Location: Under the weather. (Seattle)
TRX wrote:
a.moore wrote:
I never entirely understood the logic behind using frequency - its getting shot to hell as soon as you add any sort of damping.
I don't think damping was a big factor when those frequency figures were enshrined.
Which "frequency figures" are you referring to?

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 Post subject: Re: spring rates
PostPosted: February 17, 2018, 11:19 pm 
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Joined: August 27, 2005, 1:04 am
Posts: 1319
Location: Kamloops, BC, Canada
Tundra 7 wrote:
turbo_bird wrote:
I went fairly stiff with my suspension. It's currently at 2.4 Hz front and 2.66 rear. I started out at 1.96 and 2.38, but had way too much body roll for autocross, plus was bottoming the suspension a lot. Check out page 9 and 10 on my build log for a discussion on it, and the online calculators that I used to figure it out. It's definitely a firm ride, and I'd maybe go a bit softer for the street, but it isn't terrible the way it is now.
Kristian

The picture with your out of control sway is crazy. I don't think I've seen a 7 with that much roll. It must have changed quite a bit.

When I bought stiffer springs I went 50% stiffer front and rear. I don't have any pictures to show the roll, but I'm pretty sure it's a lot better. I'm pretty sure I was on the 10" wide slicks when the body roll pictures were taken too, so there was lots of stick.
Kristian

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 Post subject: Re: spring rates
PostPosted: February 18, 2018, 12:46 am 
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Joined: August 8, 2014, 6:08 pm
Posts: 688
Location: Green Bay, WI
My coilovers showed up last week. I went 425# front and 300# rear. I think the fequency is 2.10 front 2.4 rear. So we’ll see how it works out. I bought QA1rebound adjustable.

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