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Registered
Join Date: Feb 2009
Location: Cleveland, Ohio
Posts: 48
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Bilstein setup
Why does it seem popular to mix Bilstein Sports and HDs? Wouldn't it make more sense to have all Sports or all HDs? Just asking.
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- Steve '70 Tangerine 911T '86 Guards Red 911 '57 Black MGA |
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01-13-2014, 10:43 AM
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AutoBahned
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to try and match for various spring rates / wt. distribution w/o going to the cost of a custom valving
I would tell you of a better solution but that would be digressive... |
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01-13-2014, 12:00 PM
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Somewhere in the Midwest
Join Date: Oct 2001
Location: In the barn!
Posts: 12,499
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I'm not sure of the popularity factor, but what I have found is that the front of a 911, especially an early 911, is fairly light. So when upgrading torsion bars and shocks, a small increase in the front with a little more increase in the rear works. Example, 21mm bars in front with HD's and 28 or 29 mm bars in rear with Sports works well for spirited or DE driving.
Going to 22 in front doesn't work for some folks. It makes their ride a bit too harsh for the road...21mm with HD...is a good compromise until you go really big in the rear. Then things get a little more complicated. Matching shocks to springs is the critical task. Mind you were are only talking about two different shocks (HD and Sport) so matching one or the other work with the range of spring rates is a compromise sometimes. What I stated above, I've learn first hand and different folks have different levels of ride quality/thresholds. And simply upgrading your shocks without new bushings is not optimizing your upgrade dollars. |
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01-13-2014, 01:56 PM
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Registered
Join Date: Jun 2003
Location: Fresno, CA
Posts: 7,768
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I have HD in the front and Sports in the rear of my '74.
Personally, I think it might be a tad too firm but I'm not going to change anything until I make some changes in the torsion bars. I've already replaced all other suspension components (i.e., bushings, ball joints, etc..). On my 944, I remember getting Koni's for the front and rear and the ride was terrible. Then I increased the spring rate and the ride became super smooth yet firm. I'm thinking that that may be the same case with my 911 where the stock torsion bars may be a tiny bit weak for the increased firmness for the Bilstein's. And the fact that the '74 is fairly light and had smaller torsion bars than the later cars. Unfortunately, I'm not an expert on the technical aspect so I'm experimenting a little. |
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01-13-2014, 04:12 PM
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