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05 Base - F55 Replacement Suspension Options ??

 
Old 05-14-2017, 10:15 PM
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ramaccc
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Default 05 Base - F55 Replacement Suspension Options ??

I'm looking at replacing my F55 suspension on my base 05 (123K kms). The reason is it seems to me that the ride is not as smooth as it should be in tour mode. For example every bump I hit feels like the car is bottoming out. I'm not looking for aggressive shocks for cornering or track, what I'm looking for is a decent shock for touring with a little performance (if there is such a thing). Anyhow I realize there are numerous threads with many different options / opinion, however I'm interested in getting advice from someone who has replaced their F55 shocks with non F55.

I have read that swapping out shocks with Z06 shocks and swapping out stock sway bar with Z51 makes a big difference. If anyone has done this I'd love to hear from you.

Thanks for your time and Look forward to any suggestions.
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Old 05-15-2017, 08:16 AM
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raztek
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I can't speak to the Z06 shocks, but I have a C5 that came with Z51 suspension and replaced the shocks with Bilsteins and found a noticeable difference in performance. The car felt more compliant to the road (i.e. absorbed any bumps without bouncing/bottoming out - hard to describe, and felt less of the cross chatter inherent to the spring design).

I have since put on LG GT2 coilovers, removed the Z51 Springs and swapped the Z51 sways with C6Z06 sways and LOVE them (everything feels like a straight line lol). Ride is harsher, but the compromise was worth it.

I had F55 on my prior C5 and for me, not worth the expense as I set it to the firmest setting and kept it there - can't speak to later versions of it. So, if I were in your shoes, I would go with:
  • Doug Ripple valved Bilstein Shocks
  • Z51 Springs
  • Z51 Sway bars (if you go to wider rear tires, go Z06 sways)

Will be a stiffer ride, but the benefits will put a smile on your face often enough assuming you use your car as summer toy.

I am not a take your car to the track person, but I would not hesitate with the combo above having had enough seat time with the set ups I mentioned for a street driven car (in fact, I would probably have the mentioned set up, but I got a Corleone type offer on the GT2s). Hope you find the above useful.

Last edited by raztek; 05-15-2017 at 09:16 AM.
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Old 05-15-2017, 09:32 AM
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ramaccc
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Originally Posted by raztek View Post
I can't speak to the Z06 shocks, but I have a C5 that came with Z51 suspension and replaced the shocks with Bilsteins and found a noticeable difference in performance. The car felt more compliant to the road (i.e. absorbed any bumps without bouncing/bottoming out - hard to describe, and felt less of the cross chatter inherent to the spring design).

I have since put on LG GT2 coilovers, removed the Z51 Springs and swapped the Z51 sways with C6Z06 sways and LOVE them (everything feels like a straight line lol). Ride is harsher, but the compromise was worth it.

I had F55 on my prior C5 and for me, not worth the expense as I set it to the firmest setting and kept it there - can't speak to later versions of it. So, if I were in your shoes, I would go with:
  • Doug Ripple valved Bilstein Shocks
  • Z51 Springs
  • Z51 Sway bars (if you go to wider rear tires, go Z06 sways)

Will be a stiffer ride, but the benefits will put a smile on your face often enough assuming you use your car as summer toy.

I am not a take your car to the track person, but I would not hesitate with the combo above having had enough seat time with the set ups I mentioned for a street driven car (in fact, I would probably have the mentioned set up, but I got a Corleone type offer on the GT2s). Hope you find the above useful.
Raztek,

Great insight, appreciated and I will look into the setup you had suggested.

Thanks.
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Old 05-15-2017, 09:45 AM
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Ramaccc,

To be clear, the above WILL be a harsher ride. You mentioned you want something similar too the Tour setting on the F55. If so, go wth the Z06 shocks as I think anything more may be to rough for you. The Z51 sways will make the car flatter when cornering (less body roll). Just wanted to balance what you are looking for vs. something a bit more aggressive which is what I posted.

For perspective, I was coming from a Z51 setup on a car lowered to the point of front bushing removal on the springs and rear dropped using longer bolts.

I was coming from 15 yrs of quite harsh, so I am used to not so civil suspension manners .

Last edited by raztek; 05-15-2017 at 09:48 AM.
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Old 05-18-2017, 03:20 PM
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ramaccc
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Originally Posted by raztek View Post
Ramaccc,

To be clear, the above WILL be a harsher ride. You mentioned you want something similar too the Tour setting on the F55. If so, go wth the Z06 shocks as I think anything more may be to rough for you. The Z51 sways will make the car flatter when cornering (less body roll). Just wanted to balance what you are looking for vs. something a bit more aggressive which is what I posted.

For perspective, I was coming from a Z51 setup on a car lowered to the point of front bushing removal on the springs and rear dropped using longer bolts.

I was coming from 15 yrs of quite harsh, so I am used to not so civil suspension manners .
Thanks,

I came across a set of low mileage Z06 shocks so I grabbed them. Next I 'll be looking for sway bars either z06 OR z51.
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Old 03-08-2019, 07:12 PM
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Default Shock upgrades...

Ramaccc On my base 07, I upgraded the shocks to Koni FSD (frequency sensitive dampening shocks) the sway bars to the Z51 bars. The car stays flat and shocks are terrific. Koni says that the FSD shocks out perform their adjustable shock at soft settings. The main benefit is they offer more control than the base shocks, with far greater comfort. I'm older than dirt, so I really like a comfortable car, and these work very well; no tail wag over off camber whoop-de-doos.
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