Front damper length?

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Front damper length?

Post by CNHSS1 » Mon Sep 17, 2018 8:27 am

I had one pop out loading the trailer for a event at MIRA so put pics on here of the mods and strap but I think you're right, Raz went coil over and had one come out on track. Whilst the wheel and upright are still captive if the ball joint does come out, it does give loads more camber and drop the ride height in that corner so could still be extremely dangerous


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Front damper length?

Post by reliant-reviver » Mon Sep 17, 2018 9:27 am

Don't think I would want to run inboard coilovers on a Road SS1. Not without a lot of supporting mods and strengthening.


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Front damper length?

Post by CNHSS1 » Mon Sep 17, 2018 10:33 am

reliant-reviver wrote:
Mon Sep 17, 2018 9:27 am
Don't think I would want to run inboard coilovers on a Road SS1. Not without a lot of supporting mods and strengthening.
Agreed, HHH is primarily aimed at track only cars

To be honest I don't think the pressings are up to it for road use and coilovers really, not because of suspension loads, but potholes and other British road 'features'. Track sawtooth curbs do increasing loadings over cornering of course, but they aren't designed to damage cars, just try and make drivers from refrain from using limits of the circuit. Potholes add almost incredible loadings, I've seen a good number of upper arms fail on unmodified road cars


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Front damper length?

Post by reliant-reviver » Mon Sep 17, 2018 11:10 am

Additional to the fragility of the upper wishbones / shock brackets;
The standard rubber bushings may not be up to the extra load over time and usage, consider the size of the lowers versus the uppers.
Likewise, ball joint wise, the lower balljoint is larger and better placed to deal with the spring loads.
The coolant pipes on a CVH are close enough to slim dampers, let alone full on coilovers.
No way will the standard battery tray fit with coilovers in place.
Any task involving removal of the front cross member (cambelt etc) suddenly become more difficult with the car needing supporting when the coilovers are removed.

And to answer the original question. 13" is too short if you are looking at a ride height of anything higher than 5"


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Front damper length?

Post by scimjim » Mon Sep 17, 2018 11:25 am

I got 13.5” from a thread by Steve cork - of course, when he said “original”, he may have been talking about the dampers already fitted to his car and not the OEM type?


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Front damper length?

Post by scimjim » Mon Sep 17, 2018 11:28 am

Okay, just measured a pair of OEM doorstops and they are 15” fully open - my apologies for incorrect info.

While I’m measuring - OEM front springs are 12.25” free length.


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Front damper length?

Post by CNHSS1 » Mon Sep 17, 2018 1:00 pm

Again out of context, but yes rubber bushings aren't suitable, you need a pivot style bush ie poly bush, rather than metallastic.

As foe clearance etc, HHH does assume the prospective modifier isn't Ray Charles and does have a reasonable dose of 'clue' to be modifying any part of a car... :lol:

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I 're wrote HHH twice since 2004, I have a more up to date version 2012 iirc if you want to pop it on your site?
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Front damper length?

Post by CNHSS1 » Mon Sep 17, 2018 1:04 pm

're damper lengths, for your chosen ride height, you will need approx an inch (full blown racer) to 1.5" droop above your chosen ride height measure atbtye wheel (not shock as due to lever ratios that won't be the same.
Best way is to have car on trolley jack with no springs, sit at ride height and measure between shock mounting holes, this gives fitted length, raise car 1-1.5" and measure again.
Using std reliant pressings, even modified, I suggest you rely on cut down chassis bump stops rathervthan the shock bump stops (if fitted) to reduce impact damage to upper wishbones


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Front damper length?

Post by CNHSS1 » Mon Sep 17, 2018 1:06 pm

RR
Balljoints are more than up to the job, according to the texh dept at QH before they shut. I would suggest uppers are replaced with QH or reliant or Vauxhall rather than pattern ones though, coz some of them are rubbish...


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Front damper length?

Post by philhoward » Mon Sep 17, 2018 1:25 pm

QH ain't the company it once was though - now just a trading name of FirstLine components, IIRC.


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Front damper length?

Post by Corky » Mon Sep 17, 2018 1:48 pm

I have it in my head that rears are 15" and Fronts 15.5" in standard form (from a conversation with Mark from GAZ). I used 13.5" up front with rose joints on the DET and did the same to the current car before changing my mind to go to RG and not MP. IIRC the bushed dampers I'm using up front now are 14", still a touch short of standard, but work well with my slightly chopped springs.


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Front damper length?

Post by CNHSS1 » Mon Sep 17, 2018 2:25 pm

philhoward wrote:
Mon Sep 17, 2018 1:25 pm
QH ain't the company it once was though - now just a trading name of FirstLine components, IIRC.
Phil
I'd did the coil over conversion first in 2001, on the CVH racer, that's when I spoke with QH... ;-)


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Front damper length?

Post by reliant-reviver » Mon Sep 17, 2018 4:54 pm

All wise words Craig, you'll find no conflict from me!

Regarding the top ball joints, yes if quality then no problem. But imperative to use high tensile mounting bolts, or mount underneath the top wishbone. Likewise high tensile nylock on the joint itself and done up to the right torque ( which can't safely be achieved with cheap nuts made of metal cheese)

I did once knacker a pair of new cheapo upper ball joints in under 3k miles. There's some real tripe out there!


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