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STR Prep - Shock / Damper and Springs Discussion SCCA Autocross STR Class

Poll: STR Prep - Shock / Damper and Springs Discussion (120 member(s) have cast votes)

What brand of shocks do you use?

  1. Penske (16 votes [13.33%] - View)

    Percentage of vote: 13.33%

  2. Moton (10 votes [8.33%] - View)

    Percentage of vote: 8.33%

  3. AST (6 votes [5.00%] - View)

    Percentage of vote: 5.00%

  4. Ohlins (11 votes [9.17%] - View)

    Percentage of vote: 9.17%

  5. JRZ (8 votes [6.67%] - View)

    Percentage of vote: 6.67%

  6. Sachs (0 votes [0.00%])

    Percentage of vote: 0.00%

  7. Koni Yellow (Sport) (21 votes [17.50%] - View)

    Percentage of vote: 17.50%

  8. Bilstein (5 votes [4.17%] - View)

    Percentage of vote: 4.17%

  9. KW (11 votes [9.17%] - View)

    Percentage of vote: 9.17%

  10. Tein (5 votes [4.17%] - View)

    Percentage of vote: 4.17%

  11. Other (26 votes [21.67%] - View)

    Percentage of vote: 21.67%

  12. Koni Mono Tube (1 votes [0.83%] - View)

    Percentage of vote: 0.83%

What FRONT spring rates do you use?

  1. 1,000 lbs/in (6 votes [5.94%] - View)

    Percentage of vote: 5.94%

  2. 950 lbs/in (1 votes [0.99%] - View)

    Percentage of vote: 0.99%

  3. 900 lbs/in (13 votes [12.87%] - View)

    Percentage of vote: 12.87%

  4. 850 lbs/in (8 votes [7.92%] - View)

    Percentage of vote: 7.92%

  5. 800 lbs/in (10 votes [9.90%] - View)

    Percentage of vote: 9.90%

  6. 750 lbs/in (10 votes [9.90%] - View)

    Percentage of vote: 9.90%

  7. 700 lbs/in (17 votes [16.83%] - View)

    Percentage of vote: 16.83%

  8. 650 lbs/in (5 votes [4.95%] - View)

    Percentage of vote: 4.95%

  9. 600 lbs/in (3 votes [2.97%] - View)

    Percentage of vote: 2.97%

  10. 550 lbs/in (14 votes [13.86%] - View)

    Percentage of vote: 13.86%

  11. 500 lbs/in (4 votes [3.96%] - View)

    Percentage of vote: 3.96%

  12. 450 lbs/in (1 votes [0.99%] - View)

    Percentage of vote: 0.99%

  13. 400 lbs/in (1 votes [0.99%] - View)

    Percentage of vote: 0.99%

  14. other (8 votes [7.92%] - View)

    Percentage of vote: 7.92%

What REAR spring rates do you use?

  1. 1,000 lbs/in (2 votes [1.98%] - View)

    Percentage of vote: 1.98%

  2. 950 lbs/in (0 votes [0.00%])

    Percentage of vote: 0.00%

  3. 900 lbs/in (8 votes [7.92%] - View)

    Percentage of vote: 7.92%

  4. 850 lbs/in (3 votes [2.97%] - View)

    Percentage of vote: 2.97%

  5. 800 lbs/in (11 votes [10.89%] - View)

    Percentage of vote: 10.89%

  6. 750 lbs/in (6 votes [5.94%] - View)

    Percentage of vote: 5.94%

  7. 700 lbs/in (9 votes [8.91%] - View)

    Percentage of vote: 8.91%

  8. 650 lbs/in (9 votes [8.91%] - View)

    Percentage of vote: 8.91%

  9. 600 lbs/in (12 votes [11.88%] - View)

    Percentage of vote: 11.88%

  10. 550 lbs/in (14 votes [13.86%] - View)

    Percentage of vote: 13.86%

  11. 500 lbs/in (9 votes [8.91%] - View)

    Percentage of vote: 8.91%

  12. 450 lbs/in (5 votes [4.95%] - View)

    Percentage of vote: 4.95%

  13. 400 lbs/in (5 votes [4.95%] - View)

    Percentage of vote: 4.95%

  14. other (8 votes [7.92%] - View)

    Percentage of vote: 7.92%

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#326 User is offline   captain_pants 

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Posted 15 April 2013 - 05:52 AM

Interesting, thanks for the update! My mistake then...
Corey

#327 User is offline   sillyboybmxer 

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Posted 14 July 2014 - 10:58 PM

this thread has been dead for some time now. Bumping, because suspension!!!

Jack in the Box@Mar 30 2010, on 03:32 PM, said:

chicks dont dig hondas. Beemers, Benz, and Bentlys is what makes the coochie go woo wooooo.

#328 User is offline   tcjensen 

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Posted 15 July 2014 - 04:26 PM

View Postsillyboybmxer, on 14 July 2014 - 10:58 PM, said:

this thread has been dead for some time now. Bumping, because suspension!!!


I'll add that if I had your KW Clubsports, I'd run OEM top hats, 750/650 rates, whiteline front sway, and and ap2 stock rear sway. No lower than 13.25 ride height. (For travel's sake in the rear). Think I'd be real happy.
MY08 Chicane Silver Metallic S2k:

K&N FIPK Intake, Berk 63.5mm HFC, KWV3 V2's, 600/550 Hypercoils, Comptech V2 Front Bar, TRMC3 17x9's, 255/40 RS3 V2's

#329 User is offline   sillyboybmxer 

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Posted 15 July 2014 - 04:36 PM

I actually traded them off to ViperASR for his AST 4150s
Gonna pick up the Karcepts top hats and probably have them revalved by Maxcyspeed(AST's authorized rebuilder in the states)....if not converted to the 5200s

#330 User is offline   tcjensen 

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Posted 15 July 2014 - 05:51 PM

Cool. "Maxcy" runs locally with us.

I keep watching good drivers beat each other back and forth - KWV3's takes win, then AST 4150's, then Ohlins, and round and round it goes. Had thought about the AST's and all their monotube glory, but the KW's kept giving them a run for their money, without the frequent rebuilds. Will be interesting to see your thoughts after running them for a while. Best comparison would be on equal spring rate, but seldom do people change shocks without changing rate a bit, so a direct comparison might be hard. The biggest selling point to me on the KW's was the fact that compression change was LOW SPEED, where it matters most in affecting handling. Even many expensive shocks (including MCS double adjustables) were still changing high speed compression instead of low speed. But if you daily drive your car, or if you race on smooth and then bumpy lots, I suppose even changing high speed compression could have advantages for you. But if you don't daily it, or don't encounter very bumpy lots ... Conversion to double adjustable, if it's only high speed compression, might not be worth it. I don't know. Just something the think about. You have to spend huge money to adjust low speed compression on most high end monotubes, which I can do with $1300 used KW's. Low speed compression is very important in autocross. Doesn't have to be adjustable per se' if you can get the car to do what you want with rebound adjustments, but you want to be present in high doses, lol. That said, there seems to be camps that run also low compression ... But it seems more national winners are in the more low-speed compression, more better camp :)

#331 User is offline   sillyboybmxer 

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Posted 15 July 2014 - 06:30 PM

I honestly had no problem with the KW's either, I just wanted to try something new and the fact they are "easily" rebuildable appealed to me.
ViperASR really liked the 13k/11k Swift springs that went with them and recommended the same rate on the AST's for me(they have 650/550 currently) Its going to be a lot of changes at once though as I having been running "stock" this season. And will be going completely square at the same time(got oem ap2 wheels with 245F and 255R now)
Maxcy just got back to me and said its gonna be about 1500 to convert to doubles.....not sure I need that, but after having it with KWs I feel like I want it even though once I set the compression/bump, I never messed with it again

#332 User is offline   tcjensen 

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Posted 15 July 2014 - 09:59 PM

All I've heard is the AST's have relatively low compression and like a lot of spring rate due to that. Looks like 100-250 lb spring rage split between front and rear is way to go. I can't imagine an ap2 needing 200 lb stiffer springs in front, but the idea is to get away from super heavy bars, which lighten the inside wheel, reducing rubber on the ground

#333 User is offline   ViperASR 

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Posted 16 July 2014 - 07:44 AM

View Postsillyboybmxer, on 15 July 2014 - 04:36 PM, said:

I actually traded them off to ViperASR for his AST 4150s
Gonna pick up the Karcepts top hats and probably have them revalved by Maxcyspeed(AST's authorized rebuilder in the states)....if not converted to the 5200s


After you do that I want them back :LOL:
#187 STR
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#334 User is offline   Tomvan72 

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Posted 09 December 2014 - 12:45 PM

Does anyone have any experience with the Ohlins coilovers?

#335 User is offline   ebdavis 

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Posted 09 December 2014 - 06:57 PM

I believe that's what Marc (sirbunz) runs.
Eric Davis
#78 STR, 02 S2000

#336 User is offline   Tomvan72 

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Posted 10 December 2014 - 08:21 AM

Would be good to get some input. Ive been out of autoX for a few years. I am going to build an 04 S2k for my boss and be his co driver. We live 12 minutes From Ohlins here in North Carolina. Im buddy's with several guys that work there and they will give us good support for sure. Our car is completely stock at the moment and we would like to do a full prep on it. Fire away with suggestions!!

#337 User is offline   iamxpL 

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Posted 10 December 2014 - 01:41 PM

Ohlins TTX i think is what Sirbunz runs.
-Hezron Laluces

Sebring AP2 '06 [Sold to a friend]
RYP 2008 CR #508
STR 88

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Auto X pictures thread
B Street to STR to A street
Karcepts Adjustable Sway Bar install

#338 User is offline   sirbunz 

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Posted 11 December 2014 - 01:51 AM

Yes, I currently running the Ohlins TTX on my NA car and MCSs on my Turbo car. The Ohlins are impressive IMO and easily my favorite to date. The only available high end shocks I have yet to drive an S2000 on are the Fat Cats (budget high end?). It would take me a while to explain, and others have already explained much of it in the Ohlins threads on here

-Marc
'02 SSM S2000 "For Sale"
'00 S2000 "Track Car"
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"Die hard S2000 fan & racer!"

#339 User is offline   imstimpy 

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Posted 15 December 2014 - 09:33 AM

Bars, alignment, and OEM CR dampers and springs are a far more capable setup than I was anticipating. At the uppermost echelon of the sport, sure, the coilovers are going to give an extra little edge.

#340 User is offline   sillyboybmxer 

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Posted 31 January 2015 - 04:19 PM

does anyone have a dyno of MCS with off the shelf valving? single or double adjustable will do.

#341 User is offline   engifineer 

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Posted 25 February 2015 - 10:38 AM

Loving the info on the site regarding these setups. One item I am having trouble finding much info on (And feel free to send me a flaming search link if I am just missing it, but I have read a lot of posts on here looking already). For Koni yellows with sleeves (GC) what are most people finding to be the right length spring? I am seeing a lot of 8inch front/7 inch rears out there but not necessarily on the Koni bodies with sleeves. I am likely to be running somewhere around an 800F/650R spring rate and dropping it roughly and inch.
2001 Yellow S2000 - The STR Autox Toy. Because race car
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#342 User is offline   robinson 

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Posted 25 February 2015 - 12:34 PM

Quote

Loving the info on the site regarding these setups. One item I am having trouble finding much info on (And feel free to send me a flaming search link if I am just missing it, but I have read a lot of posts on here looking already). For Koni yellows with sleeves (GC) what are most people finding to be the right length spring? I am seeing a lot of 8inch front/7 inch rears out there but not necessarily on the Koni bodies with sleeves. I am likely to be running somewhere around an 800F/650R spring rate and dropping it roughly and inch.

I would run 6 inch front and rear springs with those rates.

#343 User is offline   imstimpy 

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Posted 25 February 2015 - 07:51 PM

I'm 2.5x7" front and rear with Genesis Technology helper perches and Hyperco helper springs. At 13.5F/13.5R, I could probably run without helpers but any lower and the springs would become unweighted when unloaded. Depending upon the tophats and helpers used, some people have reported issues with the perch/collars contacting the front a-arms.

#344 User is offline   engifineer 

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Posted 26 February 2015 - 12:21 PM

So far on here and from various vendors I am hearing anywhere from 6" to 8" springs at the rates I am working with.

I am planning to use GC sleeves and OEM top hats. The Konis I have once belonged to TheNick actually. I bought the car from a guy who got those Konis from him.

As far as helpers, I am not sure yet if I will be using them. I would like to avoid needing them if I can.

I have not heard yet about the issues of contacting the A-ARms. Is that happening mainly when running the 2.5 inch diameter spring? GC sleeve kits only come with 2.5 inch springs, and even if I go with Hyperco springs and some other sleeves 2.5" does give a bit more flexibility in finding springs and I believe is a bit cheaper.

Thanks for the replies so far guys.

#345 User is offline   RyanDavies 

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Posted 03 March 2015 - 01:13 PM

I have some 600lb and 400lb 2.5ID 7in springs for sale if needed.

#346 User is offline   engifineer 

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Posted 03 March 2015 - 02:30 PM

those would be too soft for my application. 800/650 are arguably on the lower side of stiffness for an STR build, but I also street it so I am trying to keep it manageable. Thanks for the offer though.

I am likely going with 2.25 inch springs now, since I may not be re-using the old sleeves and will be replacing them and the perches. Aka, not using the GC sleeves and perches.

Still trying to get a better idea for the springs, but likely will be going with 8" and 7" or just 7" all around. I think that will keep me in a spot with some adjustability on the sleeves with the ride heights I am choosing, but I am still playing around with those numbers.

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