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Thread: My story with H&R springs and DRC shocks

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  1. #1
    Registered User ttboost's Avatar
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    Yep...it's a twin turbo V8...The only reason they can't make any more power then they do, is because of the tiny turbine housings they have. Mine only made 317awhp/370awtq, stock on a Mustang dyno. Probably a lot of other issues going on at the time, like a bad TC, etc.. but still..not very impressive for a TT V8...Much better now that we have released some driveline loss, I have some 'test pipes' installed too. I've already picked up 60whp and haven't even finished tuning yet.
    2013 Audi S8

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    Registered User Brazil's Avatar
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    Elevens: I think you're forgetting about the elegant solution of the DRC system itself. As an engineer, I appreciate the idea and the execution. A well-functioning DRC will outperform coilovers for street driving. It is compliant while still keeping the car reasonably level during dynamic events. To get the same anti-dive/squat/lean on a coil system, you have to increase the spring rate to the point where the car is no longer comfortable. Now, I have an Esprit that basically sits on the ground and an S4 that keeps chiropractors in business, but the RS6 is a different beast. For this, I think the DRC is a great solution if you can keep it working correctly. Jason spent 1/5th of what good coilovers would cost, so that's another consideration.

    DHall1: We didn't remove the rear control arms, we slightly dropped the subframe. This is by far an easier way to get it done. I would be surprised if the dealer techs are even doing the work by removing the caliper and control arms--no matter what the procedure says. Also, the lower strut mounting point on Jason's car was left untorqued until the car was on the ground, but I don't think that's your point here.
    2003 RS 6
    2001.5 S4
    1990 200
    1990 Lotus Esprit SE
    2002 F4i Racecar

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  3. #3
    Registered User Elevens's Avatar
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    Quote Originally Posted by Brazil View Post
    Elevens: I think you're forgetting about the elegant solution of the DRC system itself. As an engineer, I appreciate the idea and the execution. A well-functioning DRC will outperform coilovers for street driving. It is compliant while still keeping the car reasonably level during dynamic events. To get the same anti-dive/squat/lean on a coil system, you have to increase the spring rate to the point where the car is no longer comfortable. Now, I have an Esprit that basically sits on the ground and an S4 that keeps chiropractors in business, but the RS6 is a different beast. For this, I think the DRC is a great solution if you can keep it working correctly. Jason spent 1/5th of what good coilovers would cost, so that's another consideration.
    All Valid points Brazil but I am not replacing the DRC because of inferior handling, but because of its almost 100% failure rate and horrible ride height. As for Ride comfort the H&R Coilover's on my car almost as good as the DRC with the exception of being a little more bouncier due to the shortened ride height (Can't have your Cake and eat it too). And yes he did spend less than what a Coilover system cost's, but the results speak for themselves and I am sure he will spend for a System later on anyway. Once again I am only looking out for all the members of our Forum so we can all enjoy Tried and Proven Results and not waste hard earned money......
    03 RS6, VIPER ECU, MTM TCU, Milltek Full Catless Non Res setup from Turbos to the boxes(ROAR'S), H&R Coilovers, Hotchkiss ARB's, 19x10's with 275-30-19 PSS's at each corner, Kenwood 9960 Head unit, V1 Radar Locator. 517 Trans Rebuild, ScrollProducts Turbo Rebuild.

  4. #4
    Registered User Brazil's Avatar
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    Well, the bounce and stiffness and ride height are part of the problems with a street car. None are really acceptable in the true sense. With aftermarket wheels, it might be a different story regarding ride height, and I like my cars low, but my RS6 wheels are perfectly concentric with the wheels arches on stock suspension.

    I bounce enough in my Esprit and S4 that I don't need that in the RS. I'm not trying to make the car something it's not, if that makes sense. It's a large sedan with an automatic transmission. There's something to be said for being able to go into a driveway.

    Anyway, to your point about saving hard earned money... Jason could replace the DRC something like 8 times before he gets into the cost of KWv3's. How is spending $3k going to save him money? Even if the new install lasts 20k miles, that gives him 160k miles of DRC goodness before he's to the price of coilovers.

    Here's my car, stock. The ride height is ok, not optimal, but definitely not that high.
    Click image for larger version. 

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    2003 RS 6
    2001.5 S4
    1990 200
    1990 Lotus Esprit SE
    2002 F4i Racecar

    Smileys are to Car Forums like the Bubonic Plague was to Europe...

  5. #5
    Registered User Elevens's Avatar
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    To each his own, I guess. But I cannot be seen in anything higher than this, its just seems to intimidate everyone and I love it..............................


    03 RS6, VIPER ECU, MTM TCU, Milltek Full Catless Non Res setup from Turbos to the boxes(ROAR'S), H&R Coilovers, Hotchkiss ARB's, 19x10's with 275-30-19 PSS's at each corner, Kenwood 9960 Head unit, V1 Radar Locator. 517 Trans Rebuild, ScrollProducts Turbo Rebuild.

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    Can anyone fire off the torque values on the rear control arms? I have access to the Bentley DVD, but Ill be damned if i can get it to work...even though Ive licensed it. I think its a windows 10 issue.

    Anyhow, I have a hybrid 4X4 deal going on over here and was going to climb underneath tonight and re-torque the system and see if it relaxes the stink bug effect on this one.

    Im waiting on a tool to finish up the timing belt job and trying to do some other things in the meantime.

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    Quote Originally Posted by 6172crew View Post
    Can anyone fire off the torque values on the rear control arms? I have access to the Bentley DVD, but Ill be damned if i can get it to work...even though Ive licensed it. I think its a windows 10 issue.

    Anyhow, I have a hybrid 4X4 deal going on over here and was going to climb underneath tonight and re-torque the system and see if it relaxes the stink bug effect on this one.

    Im waiting on a tool to finish up the timing belt job and trying to do some other things in the meantime.
    I've just read this thread start to finish. Curious if you managed to drop the rear ride height by re-torquing the the control arms?

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