92integraVTECgsr

I bought some new coilovers with custom rates for my race car. I won't mention the brand just yet.

Here are 2 dyno graphs (1 front, 1 rear). Both matching front and rear coilovers look identical as far as the results go.

Spring rates:

Front - 850lb
Rear - 1000lb

What can you tell me from the information. Are these coilovers valved properly for these rates? Can they handle those rates. I don't know anything about this, so that is why I am wanting opinions from people who have actual knowledge about this.

After this gets some discussion, I will post the brand which I know everyone will want to know.

*** Sorry for the sideways and upside down pictures. You can thank photobucket ***

grumblemarc

iTrader: (4)

Skunk2

doood

iTrader: (1)

come on man, you could have rotated those right side up in photobucket. lol

90_EX_Civic

that's not bad looking. guessing AMR, hence the setting was at 5clicks?

single adjustable, it seems. rebound looks solid, bound looks.... kinda soft...


***oh, and all that from a quick look on google to compare your charts with others, on google.

92integraVTECgsr

Photobucket kept giving me an error when I rotated and tried to save it.

Yes they are AMR. My car weighs 2450lbs w/driver.

Bound? Is that before or after rebound lol

Any suggestions what could be done to make them better? If I were to have them re-valved, what would I tell the shock builder?

doood

iTrader: (1)

try asking in the road racing forum. you'll get a lot more informed answers.

92integraVTECgsr

Ya I will. Just thought I'd keep it specific.

90_EX_Civic

lol, good guess on my part with it being amr.

bottom part of the graph is when you hit something. top half is when the shock comes back down. like i said, it looks solid, and linear. not too many hills or weird peaks.

andy know's how to build shocks, and pretty sure he ask you what the shocks where being built for, so he built them to your spec/what he knows would be a good setup. it might need some tweaking, but drive it for while first and see.

92integraVTECgsr

Yes good guess.

Andy just assembles them. He doesn't have a shock dyno to know exact specs. The guy who dyno them also rebuilds and re-valves and said he doesn't know how he got them all exact without a shock dyno.

Also, I told Andy what I wanted. He was trying to advise me to run 600lb springs.

So far they have been pretty good. I've been running them for almost a year now. I just want to know if they can be made better with different valving and if so, what do I need.

Kozy.

FWIW...

Dumped those numbers on my spreadsheet, and matched the calculated damping curves, assuming 1100kg weight, 62% front weight, .7 MR F/R and 30kf USM F/R.



Blue is AMR, red is calculated. Both the front damper.

Damping ratios seem to be

LSB - 50%
HSB - 12%
LSR - 82%
HSR - 43%

Seems up to the job to me. Lot of high speed rebound, more than I would expect, but then I don't build and sell well renowned coilovers, so what do I really know?

Design

Other way around.

Compression (+) Rebound (-)

I agree they look pretty good. But if I'm reading the stats right, it looks like the front is valved for a stiffer spring compared to the rear? Also Looks like there's a hint of crosstalk in compression.


EDIT: I should add that I do see a lot of variance in compression results. Some manufacturers like to let the spring do all the work, while some bump up compression during high speed damping. On an 800-1000 lb spring I don't think it'll be an issue. Here's mine that was matched to a 250 lb rear spring (Bilstein):