koni yellow max spring rate - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

redlined600 · 02-17-2015, 11:54 AM

Anyone know what the max spring rate the koni yellows can handle? Anyone have a dyno of the ots koni yellows.

Thanks.

finch1750 · 02-17-2015, 02:52 PM

@Racecomp Engineering is probably the most likely to know

Racecomp Engineering · 02-17-2015, 03:12 PM

I have not seen a dyno of the Koni Yellows for 86. My guess is they could be fine with up to 350 lbs/in springs, but that's just a guess.

- Andy

7thgear · 02-17-2015, 03:17 PM

afaik they're rated for up to 500lb/in ishhh (info from back when I was didling with VWs)

not sure if anyone has a BRZ/FRS koni dyno but I'd be surprised if they're anything different from their general application, which is a small firming of the low and high speed compression (barely noticeable) and a significantly higher high-speed rebound with a fast ramp-up rate.

a quick and cheap fix for most drivers, but will "jack down" quickly over successive bumps.

Roadcone · 02-17-2015, 03:21 PM

When I ran koni yellows on my cobalt i ran them at 1/2 turn from full soft anything past 3/4 would result in shock jacking.

ayau · 02-17-2015, 03:23 PM

Quote:

Originally Posted by Racecomp Engineering

I have not seen a dyno of the Koni Yellows for 86. My guess is they could be fine with up to 350 lbs/in springs, but that's just a guess.

- Andy

Can you explain or provide an article that explains the effects of an overdamped and underamped shock?

Racecomp Engineering · 02-17-2015, 03:28 PM

Quote:

Originally Posted by ayau

Can you explain or provide an article that explains the effects of an overdamped and underamped shock?

This might help. I think I covered that in here.

http://www.ft86club.com/forums/showthread.php?t=81062

EDIT: I didn't really talk about underdamped situation much in there. That will result in a bouncy ride (you hit a bump and the chassis takes a few oscillations to settle).

- Andy

swarb · 02-17-2015, 03:31 PM

right around 450-500lbs/in from my experience in the fwd honda civics.

02-17-2015, 11:54 AM	#1
redlined600 Senior Member Join Date: Nov 2014 Drives: Fr-s Location: MN Posts: 774 Thanks: 139 Thanked 555 Times in 288 Posts Mentioned: 5 Post(s)	koni yellow max spring rate Anyone know what the max spring rate the koni yellows can handle? Anyone have a dyno of the ots koni yellows. Thanks.

02-17-2015, 02:52 PM	#2
finch1750 Undisputed El Presidente Join Date: Jun 2012 Drives: Zenki 37J ZN6 Location: Stockton, CA Posts: 11,594 Thanks: 9,405 Thanked 9,411 Times in 5,270 Posts Mentioned: 374 Post(s)	@Racecomp Engineering is probably the most likely to know __________________ "Just like how a strut bar somehow enables you to corner 20MPH faster around a cloverleaf on-ramp, when the reality is, you can do it already but you just don't have to balls to do it." - CSG David

02-17-2015, 03:17 PM	#4
7thgear i'm sorry, what? Join Date: Jan 2012 Drives: Canada Location: I rock a beat harder than you can beat it with rocks Posts: 4,399 Thanks: 357 Thanked 2,508 Times in 1,268 Posts Mentioned: 40 Post(s)	afaik they're rated for up to 500lb/in ishhh (info from back when I was didling with VWs) not sure if anyone has a BRZ/FRS koni dyno but I'd be surprised if they're anything different from their general application, which is a small firming of the low and high speed compression (barely noticeable) and a significantly higher high-speed rebound with a fast ramp-up rate. a quick and cheap fix for most drivers, but will "jack down" quickly over successive bumps. __________________ don't you think if I was wrong, I'd know it?

02-17-2015, 03:21 PM	#5
Roadcone StreetKart Join Date: Jul 2013 Drives: 2014 Scion FR-S Monogram Location: Upstate, SC Posts: 477 Thanks: 43 Thanked 181 Times in 111 Posts Mentioned: 10 Post(s)	When I ran koni yellows on my cobalt i ran them at 1/2 turn from full soft anything past 3/4 would result in shock jacking. __________________ TRD\|Verus Engineering\|Titan7\|DEZOD Motorsports\|JDL Auto Design

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02-17-2015, 03:12 PM	#3
Racecomp Engineering Join Date: Nov 2011 Drives: 2016 BRZ, 2012 Paris Di2 & 2018 STI Location: Severn, MD Posts: 5,520 Thanks: 3,542 Thanked 7,416 Times in 3,034 Posts Mentioned: 311 Post(s)	I have not seen a dyno of the Koni Yellows for 86. My guess is they could be fine with up to 350 lbs/in springs, but that's just a guess. - Andy

02-17-2015, 03:31 PM	#8
swarb Senior Member Join Date: Sep 2014 Drives: BRZ Location: Los Angeles Posts: 3,052 Thanks: 1,773 Thanked 2,451 Times in 1,271 Posts Mentioned: 79 Post(s)	right around 450-500lbs/in from my experience in the fwd honda civics.

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