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Kirkham Motorsports

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  #1 (permalink)  
Old 04-09-2018, 12:20 PM
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Default New shocks for backdraft!

Hello!

Who can tell me what shocks are the best option as an replacement part!
Probably there are some options from europe like bilstein or other european brands as I do live in germany.
Would be glad to get help!

Thanks
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Old 04-10-2018, 01:22 PM
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Front shocks KYB 361005:
Application = 85-93 VW Cabrolet, 80-84 Jetta, 75-84 Rabbit, 75-89 Scirocco.

Rear shocks KYB 343144:
Application = 58-80 VW Bettle.
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Old 04-10-2018, 01:35 PM
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Thanks spdbrake!
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Old 04-11-2018, 09:28 AM
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I use JRi double adjustable struts up front and JRi double adjustable shocks in back.
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Old 04-11-2018, 12:20 PM
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Default Shocks

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Originally Posted by Grey 65 View Post
I use JRi double adjustable struts up front and JRi double adjustable shocks in back.
Best shocks on the market bar none
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Old 04-11-2018, 01:55 PM
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Last edited by cbreez; 04-23-2018 at 06:46 PM..
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Old 04-11-2018, 03:26 PM
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Default Jri

Their range of adjustment, they can go from a 250 pound spring to a 1200 lb spring without revalving. This can be a curse if you don't know what you are doing you can destroy handling if adjusted incorrectly. We only move a couple of sweeps in either direction when tuning for different surface conditions.
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Old 04-11-2018, 05:08 PM
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I have to believe that you know what you are doing with these JRi shocks, but I didn't know that shocks used a measurement of pounds like springs. My understanding is that shocks produce pounds of resistance to rate of compression and extension, like in inches/sec or velocity. Springs, on the other hand, produce pounds depending on their spring rate and the amount of compression. Suspension adjustments are a mystery to me, but I can understand how modern race cars probably have a computer controlling the shock settings depending upon the speed of the car and the racetrack conditions.
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Old 04-11-2018, 06:25 PM
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Last edited by cbreez; 04-23-2018 at 06:47 PM..
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Old 04-12-2018, 04:45 PM
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Default Shock forces

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Originally Posted by Kobura View Post
I have to believe that you know what you are doing with these JRi shocks, but I didn't know that shocks used a measurement of pounds like springs. My understanding is that shocks produce pounds of resistance to rate of compression and extension, like in inches/sec or velocity. Springs, on the other hand, produce pounds depending on their spring rate and the amount of compression. Suspension adjustments are a mystery to me, but I can understand how modern race cars probably have a computer controlling the shock settings depending upon the speed of the car and the racetrack conditions.
You are correct that shock forces in pounds are generally measured in inches per second. I skipped some steps just to illustrate the value of JRI's.
The higher the spring rate you run the greater the required rebound damping is. This is greatly simplified because frequencies, unsprung mass and other factors are involved. My car operates generally in the 1" to 2" per second range in an autox. If I increase my spring rate I also need to increase my rebound damping to maintain the same rebound velocity with the higher rate spring. When I was running Penske's I switched from a 1200 lb spring to an 800 pound spring and had to re-valve the shock to accommodate the new spring rate. You could do that with a JRI by just readjusting the shock.
My Porsche has electronic automatic damping control based on velocity of the suspension and many other vehicle parameters. If it were legal in our class (SS) I would have JRI dampers so we could tune the car more precisely to surface conditions. There are aftermarket electronic controls for the Porsche shocks too but they are also not legal in our class. In general as grip on a given surface comes up due to temperature, rubber on the track etc we increase rebound damping and the inverse. We also can effect dynamic balance of the car. You need really repeatable adjustments in a shock to do that and in my opinion JRI's are the best generally available short of the Multimatic DSSV shocks used on the new Ford GT and several GM products, very expensive though. Hope this helps.
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Old 04-12-2018, 04:51 PM
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Default Adjustments

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So you change springs a lot and need this? Would most street cars need this?
How do you adjust yours? 50-50, 70-30? Tell us how to do this...
I suggest you read some of Carroll Smith's books such as "Tune To Win".
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Old 04-13-2018, 08:54 AM
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Last edited by cbreez; 04-23-2018 at 06:47 PM..
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Old 04-13-2018, 09:11 AM
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Default Questions

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I see...so you don't know what you are talking about...just talking.
Your questions have so little technical value that they cannot be answered with any specificity. It appears that you are just another low IQ troll who derives pleasure from making stupid comments on a serious forum. I was warned by a good friend on Club Cobra to ignore you in the first place. I should have listened to him.
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Old 04-13-2018, 12:33 PM
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Originally Posted by cbreez View Post
I see...so you don't know what you are talking about...just talking.
It may be prudent to do a little research on CSX #3170 and his successes in the competitive arena.
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Old 04-15-2018, 09:35 AM
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Last edited by cbreez; 04-23-2018 at 06:48 PM..
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Old 04-16-2018, 09:22 AM
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Talking

Quote:
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The original question was for some shock recommendations. Most guys here don't try to race their cars, change springs, etc. so KISS...That's all the guy asked.
It great to hear a guy talk about his own alleged knowledge and expertise!
My questions have so little technical value, but you never answered the dampening question, maybe you don't know, funny... so you give us your beneficial knowledge... and with your troll comment...a good response (kinda old...) so you just keep us on the right path...
cbreez, Just stick with air shocks.... But make sure you get them with the auto leveling option...
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Old 04-16-2018, 06:13 PM
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I have the KYB rear shocks that spdbrake listed and, I believe, fit a VW bug, so must be for a light vehicle application and probably is appropriate to try on a BDR. I am still searching for a better spring/shock combo. But it would be nice if there were a metric for shocks, like lbs/in/sec, so that one could determine where one was in the scale of damping to go along with the spring metric of lbs/in. Then, one could shop around for an adjustable shock that was in the range of the shock rating that seemed close to the desired value just like spring rates.
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Old 04-17-2018, 05:15 AM
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Kobura,

If you wanted a reasonable priced adjustable, Koni has some.
Externally 50/50 single adjustable (rebound and compression both adjusted at same time) These give roughly 100% increased dampening over Stock when at Max settings.

Front externally adjustable (via knob while installed) 50/50 dampening. PN 86411048Sport
https://www.ecstuning.com/b-koni-par...86411048sport/

For the rear they're adjustable but require full compression and turning the body to change dampening. 50/50/dampening. PN 80-2149
https://www.lmperformance.com/709063...hock-rear.html
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Old 04-17-2018, 01:04 PM
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I ordered the KYB shocks, that spdbrake listed!
I will give it a try for street use!
Thanks for the information !
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Old 04-23-2018, 06:27 AM
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Last edited by cbreez; 04-23-2018 at 06:49 PM..
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