"Best" Ohlins spring rates?

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Dec 30, 2016 | 08:07 AM

#26

ZDan

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Joined: Sep 2011

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From: Pawtucket, RI

Quote:

Originally Posted by j9fd3s

i was going to post some numbers from our old race Integra, it seems like a good example of the difference between weight distribution, spring rate, and wheel rate.

the maths are owning me, but it was like, 2300lbs, 62/38 weight distribution. we ran 750/950 springs (plus a sway bar the size of your arm), and with the 1.5/1.35 (.75/.8ish) motion ratios its something like 350/450 wheel rate.

the natural frequency is something like 2/4 (it wasn't street friendly), notice that the FC runs 450/350 (8/6k), and with a 50/50 weight distribution has a natural frequency of like 2/2.5.

fwd isn't exactly ideal for racin'! I guess you had to stiffen up the lighter end of the car in order to be a able to put the power down (even modest power) as it unloads the drive wheels on acceleration. Wrong-wheel drive!

Dec 30, 2016 | 03:04 PM

#27

j9fd3s

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From: https://www2.mazda.com/en/100th/

Quote:

Originally Posted by ZDan

it didn't want to turn either.

car still holds the TTE lap record at Thunderhill, so it wasn't slow.

Dec 30, 2016 | 03:40 PM

#28

BLUE TII

Rotary Motoring

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From: CA

Yeah, FWD had a solid showing in the 2016 World Time Attack Challenge in Australia.

In Pro Am a CRX took 2nd fastest lap only 0.167 behind the Pro Am winning Evo 9 and 5.847 seconds faster than the Pro Am 4th place FD RX-7.

Faster than Nobuteru Taniguchi (4th) in the fastest Pro class (Sutton Bros S15).

In ClubSprint class it was a Civic that took #1 spot.

And FWD cars were only 10 out of 86 entries.

FWD can do a fast lap.
FWD has problems with front tire management as the laps add up.