No much weight on HSD

R

RCSRX8

New Member
Hello,

I have an rx8 which I am converting to a pure track car, I have stripped the inside out and will be having a roll cage fitted in July. I understand the weight of the car would of dropped, specially the rear end. I have been adviced to get smaller springs for the rear if I bought the hsd coilovers. Does this advice sound right? Also is this something possible to do?

My concern is that the rear end wont be heavy enough to sit low on the spring... though I am having the roll cage plus spoiler, albeit carbon fibre.

Whats your advice people?

Rich
 
Hi Rich,

HSD use seperate height and preload adjustment, so you should be able to have the car at whatever height you like.

I'd wait until the cage is in the car and it's weighed before you tweak spring rates, you may find you loose little to no weight at all - depending on how heavy the RX8 interior and the cage is. It's impossible to say at this stage.
 
Excellent thanks. I was thinking about getting the cage etc. in then putting it on a bridge and weighed before I get the coilovers.
 
Get and fit the coilovers first, then do your setup.
It's the only way you'll know if you need to change spring lengths.
 
I wouldn't say spring lengths , I'd suggest a shorter shock, Going from experience.

I've Got MiesterR's as you know mate, they're on the lowest setting - I've even removed the locking collars and the car sits really high. My car has been stripped with the cage fitted. The weight is around 1250kg's -150kgs lighter than stock.

I've changed the springs for stiffer ones (for handling reasons, not height.) from 6k to 10k on the rear. so there is no sag. I think the HSD's are 7k on the rear so it will be better, low wise.

I've Spoke to Jerrick at MeisterR and he suggested to me about having a shorter rear shock witch I've yet to do.

I hadn't used the HSD's but I'm pretty sure the same situation will happen.

Just my 2 cents.
 
Also get a proper corner weight setup rather than relying on a weigh bridge, I've got experience of these and can say some of them can be seriously out of calibration!
 
HSD aren't Meister R, you can't compare the 2.

Quick Google of HSD RX8:

rx8beach-M.jpg


We've never had anyone say they can't go low enough and I personally test fitted the first test kit and it was SLAMMED on stock wheels.
 
HSD are Powertrix, Everyone on RX8club.com raves about them.

Calling all Powertrix RX8's! - Page 11 - RX8Club.com

you're not getting my point. Alot of weight is being removed from the rear end which means a higher rear end, so to compensate you need to wind the coilover down more.

My RX8 with the MeisterR's was slammed when it had the full interior with lots of adjustment left. Soon as it was stripped, the car was higher than stock. So I wound the coilover down and ran out off adjustment with is still sitting heigh.

Current fitment with a maxxed MeisterR coilover, stripped with cage.

8579_10200855667903810_1761961213_n.jpg
 
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Powertrix are HSD, not the other way round.
I fully understand how weight effects suspension, but we won't know anything until the guy has his car set up.

As long as a shorter spring doesn't botom the damper out, it's the solution to go for. We shouldn't need a shorter damper.

Do you have a picture of your slammed car before you stripped it out?
 
Alight, I'll hold my hands up, Not as 'Slammed' asIi thought it was but here is a photo - although, it still had a fair bit of adjustment left.

407793_10150554620010674_1501924538_n.jpg


A friend of mine recently bought some HSD's for his RX8 from you guys and I got to have a look at them.

8734981923_7c23388cb7_c.jpg


Like you said, the design is completely different to MeisterR's

8736103184_61ccf1c646_c.jpg


Looking at the HSD's there is so much more adjustability, like you said. I doubt you'd need to change the spring let alone the shock, again... as you said.

I've always kicked myself for getting MeisterR's over the HSD's. I haven't put the HSD's on my mates car yet - I'll see if he wants to swap with some cash. :smash:

What size are the HSD spring on the RX8? I've bought some Harder springs for the MeisterR's and might be able to swap them over. My Meister spring are 62mm 180mm and 62mm 200mm.
 
It depends when he purchased the kit, but it's probably 175mm free length and 65mm ID.
 
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