Restoration-Mini

Technical Forums => Maintenance and Modifications => Topic started by: John Gervais on June 23, 2020, 01:55:15 PM

Title: Suggestion for suspension dampers / shock absorbers
Post by: John Gervais on June 23, 2020, 01:55:15 PM
I'm wondering if anyone is using the KYB AGX or the KYB Gas-a-Just shocks, for how many years and how they like them.

I've had my current  KYB Gas-a-Just for many, many years (July 2006) and the car has now developed a 'hop/bounce' at 10-15 mph.  I suspect that it's from the front.  They haven't too many driving miles on them, but have been installed and the car sits for long periods.  Before I remove them to see if they compress/expand on their own, I'd like to plan ahead.

Alternatively, what else is there that won't break the bank, will last a long time and is 'fast-road' suitable for a heavy, lowered mini with 12"ers.
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: 94touring on June 23, 2020, 02:05:43 PM
Really happy with my protec shocks and like gaz adjustable too.
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: John Gervais on June 23, 2020, 02:16:48 PM
Minispares sells Gaz, who sells Protech?

Found them:  https://www.protechshocks.co.uk/ (https://www.protechshocks.co.uk/), but WAY over my budget (they also don't say what the compressed length is) - I'm looking at either a set for the front or a set for the rear, depending upon where the problem lies.
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: 94touring on June 23, 2020, 02:36:07 PM
https://www.protechshocks.co.uk/protech-shocks-mini-teles-front-rear-package/

Click on length and it gives the specs. I don't think your link was to their mini shocks
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: gr8kornholio on June 23, 2020, 02:47:55 PM
I had the kyb agx on my slammed Toyota. Really liked them.  Of course it was more cruiser with the exception of when I found a smooth turn I kept it wound up. Handled well and pretty smooth.
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: John Gervais on June 23, 2020, 03:49:29 PM
Quote from: 94touring on June 23, 2020, 02:36:07 PM
https://www.protechshocks.co.uk/protech-shocks-mini-teles-front-rear-package/

Click on length and it gives the specs. I don't think your link was to their mini shocks

I saw the mini shocks, but didn't see the lengh button - I guess I was 'shocked'.  It's a set of 4 (front and rear) which is probably a good deal, but I haven't the funds to replace all 4.  I could possibly do 2, but not all 4...
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: Rosebud on June 23, 2020, 04:23:28 PM
You might try having the front tires rebalanced. On the other hand, if you've put 1000+ miles on the car since the hop/bounce began, you may have worn out at least one of your front shocks as a result.
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: John Gervais on June 23, 2020, 04:29:05 PM
Good idea, thanks - I've been wondering if perhaps the tires could use re-balancing so I might as well take 'em to be checked.  The mini hasn't gone a thousand miles per year in many years.  I've been averaging around 500 - 700 miles per year, but hope to do more.
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: MiniDave on June 23, 2020, 04:47:44 PM
A hop or bounce at 10-15mph? Likely not a tire balance problem....I would look for a bulge or bad spot on the tire, like a displaced band in the tire's construction. Hit any bad pot holes lately? Easy way to test.....move the fronts to the back and see if the problem moves with them.
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: Rosebud on June 23, 2020, 05:13:27 PM
Quote from: MiniDave on June 23, 2020, 04:47:44 PM
A hop or bounce at 10-15mph? Likely not a tire balance problem....


You're right. I didn't consider the low speed range of the hop/bounce. If it's bouncing at 10 mph, it'd be unlikely to smooth out and higher speeds. Still, you wouldn't expect a bulge or a damaged layer to smooth out ether. Perhaps I misunderstood... does it in fact smooth out at higher speeds? 🤔
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: John Gervais on June 23, 2020, 05:25:34 PM
There's no visible damage to the tires, but I'll rotate them tomorrow.  It kinda smooths out at higher speeds, though there is a slight vibration through the steering wheel.
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: MPlayle on June 23, 2020, 09:12:56 PM
Flat spot in a tire from sitting?

Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: tsumini on June 24, 2020, 08:56:52 AM
Quote from: MPlayle on June 23, 2020, 09:12:56 PM
Flat spot in a tire from sitting?
I'd guess very likely.
I bought a 1973 Monte Carlo that had been sitting for about 5 yrs. I ended up replacing all four tires. Drove terrible. wobble, bounce etc
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: John Gervais on June 24, 2020, 03:24:30 PM
And so the update -

The tire shop was overbooked and understaffed, so I couldn't get the tires balanced or checked for flat spots today.  I decided to check the front shocks - they were firm/steady to compress and recovered smoothly, so I assume that they're fine for now (which will also give me some time to save up for some gourmet shocks).

Then I rotated the tires, or at least moved them around.  My garage Haynes didn't have a diagram and I couldn't remember the 'rule', so I whipped out the ol' cell phone and looked it up online.  Wouldn't you know, as I looked at the various non-directional tire rotation patterns, I neglected to notice that they're different between rear-wheel drive and front-wheel drive. 

I ended up doing a rearward cross instead of a forward cross, so I'll be swapping them L to R at each end tomorrow since the mini is front-wheel drive.

:-[
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: MiniDave on June 24, 2020, 05:15:49 PM
Make sure the tires aren't directional.....I cross rotated the tires on my 2009 Clubby and could not figure out why the left front lugs kept working loose in only a few miles. Guess what ?
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: John Gervais on June 24, 2020, 05:39:02 PM
Yokohama A539's, asymmetrical, non-directional.
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: Rosebud on June 25, 2020, 12:25:24 PM
Quote from: MiniDave on June 24, 2020, 05:15:49 PM...left front lugs kept working loose in only a few miles.
I thought unidirectional tires were marked as such because of the tread pattern and possibly the direction of the fabric (and steel) layers. I can't imagine why there would be a problem with the lug nuts.  Oh, wait...  was this a joke? 🤔
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: MiniDave on June 25, 2020, 12:50:47 PM
No joke, I don't know if running them backwards set up some sort of vibrations or what, but twice in only a very few miles the left front wheel was loose......rotating them back to the correct side and I haven't had a bit of problem since, nor had I before I cross rotated them.
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: Rosebud on June 25, 2020, 05:15:27 PM
Quote from: MiniDave on June 25, 2020, 12:50:47 PM
No joke


Wow! That's weird. At least it wasn't a joke. https://giphy.com/gifs/9eLbjOcGOpmY8 (https://giphy.com/gifs/9eLbjOcGOpmY8)
Title: Re: Suggestion for suspension dampers / shock absorbers
Post by: Sybil on July 07, 2020, 01:22:48 AM
We're on GAZ dampers with a set of custom springs made by Minitastic.  Been on them 3 years now and several thousand hard miles later we still LOVE them. 

A lot of rubbish springs out there and have heard bad stories, Minitastic really knew his stuff though.