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Thoughts on alignment?...and Whitetiger's Coilover Hijacking


jasejase

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Bilstein is a large well known and reputable shock maker. They have a range of products, but the lower end of the range, including the HD's are really nothing more than a OEM replacement shock. having said this, bilstein shocks are very consistent, even better than koni, but for this particular application, if you compare the valving of both off the shelf units, id go with koni. Its just better valved for aftermarket springs.

 

Having said this, there are a boat load of shops that can build and revalve bilstein shocks to make than way better than the stock HD valving.

 

from here - http://www.farnorthracing.com/autocross_secrets18.html

 

 

off the shelf units are very convenient, but nothing beats a set of custom built, dyno-tuned and matched shocks. With a set of the Bils, you can have them sent out and turned in to some amazing stuff for not too much money. You can do the same with konis as well, but if you are gonna go custom, bilstein all the way. YOu can even have Penske canisters added to get real good adjustments if you are willing to put down some coin.

 

 

I have been searching around and can't find a good answer - probably because I don't know the right terms to use.

 

But what actually makes a good shock? Like why is a Bilstein of Nascar better than a Bilstein HD?

 

Is it the level of customization so you can control compression and rebound for the track you are at?

 

Can you custom valve a shock so it's better for daily driving / track days and you don't have to mess with it? What does that look like? or is it just adjustable ones are nice because you can make them soft for DD and make them stiff track days?

 

my knowledge of this is really limited to mountain biking where I adjust the shocks to be soft enough to give me enough pop but not too much pop.

 

If there are some basic links (like super basic) articles on shocks for racing that you are aware of I would be happy to read those - just not sure where to start searching.

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Damn it whitetiger.. you made me spend $ on a LSD (good idea btw) and now I am about due to spend $ on suspension.. so... let's just say that I am thinking of purchasing a set of bilstein hd's and sending them off to one of the "boat load of shops that can build and revalve them to make them better".. who might they be and what the hell would I tell them? cause so far telling people I want my cars suspension to feel like my buddies GT3 isn't really translating:) my other pie in the sky "I don't know what I am talking about but I find it really interesting" phrase is that I want an "Irish tarmac" set up. :) BTW thanks ob2.5xt for the ride offer.. traveling w fam does not = any free time:)
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I have been searching around and can't find a good answer - probably because I don't know the right terms to use.

 

But what actually makes a good shock? Like why is a Bilstein of Nascar better than a Bilstein HD?

 

It has to do with shock force development. Clearly a custom valved and matched shock specific for the application is going to better than some off the shelf unit.

 

 

Is it the level of customization so you can control compression and rebound for the track you are at?

 

It has to do with user-serviceability and having the car critically dampened for the spring rates being run. Most ultra-high end shocks are actually not adjustable. Instead they have a team of guys who can disassemble and rebuil the shock on the bench to gt the forces right.

 

Can you custom valve a shock so it's better for daily driving / track days and you don't have to mess with it? What does that look like? or is it just adjustable ones are nice because you can make them soft for DD and make them stiff track days?

 

Absolutely! a shock builder can tailor the forces in the shock you your liking. you do not need adjustments. when the forces are right, they are right and you should not need to change it. The only reason shocks come with adjustment is to fine tune the forces and this is technically not necessary. people who crank up the dampening when they race and then soften it up on the street are doing it wrong. odds are they are racing with an over-dampened car, and then driving on the street with an under-dampened car.

 

my knowledge of this is really limited to mountain biking where I adjust the shocks to be soft enough to give me enough pop but not too much pop.

 

:lol: mountain biking is a totally different animal. its more about reducing shock than maintaining traction per se.

 

If there are some basic links (like super basic) articles on shocks for racing that you are aware of I would be happy to read those - just not sure where to start searching.

 

the far north racing site i keep linking too is really the best place to read.

http://www.farnorthracing.com/autocross_secrets.html

http://www.farnorthracing.com/autocross_secrets6.html

http://www.farnorthracing.com/autocross_secrets18.html

http://www.farnorthracing.com/autocross_secrets19.html

http://www.farnorthracing.com/autocross_secrets20.html

http://www.farnorthracing.com/autocross_secrets23.html

 

and so on.....Just read the whole damn site. it will blow your mind.

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Damn it whitetiger.. you made me spend $ on a LSD (good idea btw) and now I am about due to spend $ on suspension.. so... let's just say that I am thinking of purchasing a set of bilstein hd's and sending them off to one of the "boat load of shops that can build and revalve them to make them better".. who might they be and what the hell would I tell them? cause so far telling people I want my cars suspension to feel like my buddies GT3 isn't really translating:) my other pie in the sky "I don't know what I am talking about but I find it really interesting" phrase is that I want an "Irish tarmac" set up. :) BTW thanks ob2.5xt for the ride offer.. traveling w fam does not = any free time:)

 

Shops that build bilstein are all over the place. Most are small independent places that sponsor or have there own race teams. Its generally a good idea to find a place close to you who you can talk with about what you want, but i can list some places that i know do that sort of work. These are not necessarily places that specialize in Subaru application specifically, just well known places that are respected for the work they do. I'm sure ill get flack for listing places that are not vendors, but here goes...

 

http://www.racecompengineering.com/ we all know them. They are a shock shop among other things. Id start with them. though their product page lists alot of the parts we are used to seeing, its what they dont list, there custom shock work, that makes them special. Call them for the good stuff. I got my AST4100s from them for my LGT.

 

http://www.vorshlag.com is a big racing shock developer who works with a bunch of great brands including bilstein, AST, Moton and MCS. I ordered my MCS shocks from them and i did ask them about working on bilstein Subaru shocks and they says they could.

 

http://www.fatcatmotorsports.com/ is well know in the Miata community and all they do is work with bilsteins.

 

http://www.anzeengineering.com/ is a more local to me shop who builds alot of race/autox applications. they do seriously good work. (think Penske ;))

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