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Monster_UK

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Reply with quote  #1 
Hi All,

New Tiger owner here... I need to replace the front shock absorbers on my Tiger Super Six.  Can anyone point me in the direction of their specification or share experience about which works well?

I'm setting the car up (eventually) for track days so don't mind leaning towards performance.

Thanks,

Tim

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Andromeda

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Reply with quote  #2 
See if this helps, it was posted to me after enquiring about rear spring



Back when I built my car (2001), I found it bottomed out with two people on-board, so went down the route of fitting stiffer springs and bought stiffer 325lb/in springs which solved my problems at the time. Others went up to 350lb/in.

They're 9" x 2 1.4" coilovers and you can get them from many places - Rally Design, Merlin Motorsport etc.


Earlier this year, I found my front damper was leaking, so looked into replacing them all, and I came across this post: https://forums.tigerownersclub.co.uk/post/show_single_post?pid=1304254803&postcount=7&forum=425180

My brother already had adjustable dampers front and rear (Avo's) and we got talking. He beat me to it, copying @jannick's setup and said it transformed the car with adjustable dampers all around, 8" x 110lb/in springs on the front and 9" x 250lb/in springs on the rear. The key not being the spring rates, but the damping setup - at the front, by being a lot softer, it allows the suspension to follow the road better, and at the rear making the damping harder prevents the short duration undulations which result in bottoming out the suspension.

After much research, I ordered a set of ProTech adjustable dampers for the front and rear. I went with spherical bearings rather than rubber/polyurethane bushes as the Cat suspension is slightly out of alignment, which the spherical bearings take up nicely. My springs arrived late yesterday evening, so hopefully I'll get them installed this weekend after I've done all the other jobs that are lined up.

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Monster_UK

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Reply with quote  #3 
Thanks...that’s really useful. It’s protechs that are on there at the moment but not sure which model.
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Reply with quote  #4 
My post that has been quoted was in relation to the Cat/Super Cat which has inboard front shock absorbers.

I'm sure similar dynamics would be in play with the Super Six, but the moments are different and therefore spring rates and damping would differ.
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Monster_UK

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Reply with quote  #5 
Yup I spotted that it was a different model Tiger.  I'm a little way from spring rates and damping and more at the stage of figuring out which shocks would actually fit [wink]  I'm pretty good at the spanner in hand stuff but as a total novice to kit cars and Tigers the bewildering array of products that are all slightly different is intimidating!  Perversely as a motorsport fan I'm probably more comfortable with the (theory of) spring rate and damping that I am confident that the shock I buy would actually fit!

I think the model that I have is the Protech 400 series or (or its predecessor).  The Protech dimensions webpage (https://www.protechshocks.co.uk/dimensions/) is pretty clear and I should be able to get a number of dimensions next time I'm at my garage to narrow it down further.  I might have to take the shock off to get enough dimensions to get it exactly.

Of course... I might just go back to SPAX ordered from Tiger because then I'll be sure that they fit!

Thanks,

Tim 

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Andromeda

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Reply with quote  #6 
I am the same 😂😂. Just replaced the 300lbs rear springs with the 250 recommended and turned up the dampers. Just need the weather now to try it out 😁
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Andromeda

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Reply with quote  #7 
Laura at Tiger is very helpful 👍👍
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Reply with quote  #8 
I did lots of research and generally the ProTech's are the highest regarded with the least number of issues, which is why I went for them, along with the helpfulness of the team at the factory. 

Across the wider car audience, nowadays, Spax don't really seem to be recommended by anybody, Gaz come in 3rd, Avo 2nd and ProTech first.  I was happy for years with my Spax and have only replaced them as they were leaking oil, but the new dampers are several levels above in terms of quality.


For what it's worth, I got 600's which have been specifically valved for the lighter weight of a kit car which in turn means the damping adjustment gives you a choice of a few settings that will work, rather then one setting being too soft and the next being too stiff.
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Andromeda

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Reply with quote  #9 
Do
You have part numbers for what you have used? Don’t know how old the front spax are but tears are brand new, but would be willing to replace to get a great set up 👍👍. Thanks for your help much appreciate it

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Andromeda

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Reply with quote  #10 
The spax I have on have 28 adjustments on them, so I have put the rear up to 22 today with the new springs
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Monster_UK

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Reply with quote  #11 
Just a quick update, I stripped the shocks off the car and sent them off to Protech for them to be serviced. They were great. £60 for both front shocks and they have come back like new.

Turns out that I have 2.25 ID, 8” 275lb springs on the front with Protech 400s.

Had a bit of fun and games getting the spring back on. There’s very little clearance between the shock and the spring for the compressor. Anyway, I developed a work around and got them all reassembled and back on this morning. I’m just finishing up some painting on the chassis and then I’ll be giving them a shake down.

If you are interested there’s some pictures on my blog here:

http://www.cartigersupersix.com/shock-horror/

I’ve poked around at the back of the car which also had Protechs. The spring has 2.25 ID, 8”, 180lb written on it. I can’t believe this is right. That’s super soft and I’m not a small chap! The car would be dragging itself along the floor!

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Abe

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Reply with quote  #12 
Good work mate, those shocks look very nice. I thought you’d drilled through your kitchen table for the spring thing 🤣
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Monster_UK

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Reply with quote  #13 
Thanks... tbh I would have drilled through the kitchen table I was that determined to get them back on!

Everything is back together and I had her out this morning. She feels great! The back end is far too soft. So for that I think the springs are just fully compressed. Easy to switch them out for some stuffed ones though.

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Reply with quote  #14 
Quote:
Originally Posted by Monster_UK
Thanks... tbh I would have drilled through the kitchen table I was that determined to get them back on!

Everything is back together and I had her out this morning. She feels great! The back end is far too soft. So for that I think the springs are just fully compressed. Easy to switch them out for some stuffed ones though.

Good stuff!! I wanna get mine back together now so I can have a blast.
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Schrodinger

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Reply with quote  #15 
Just bear in mind that the springs on the back are almost vertical whereas the fronts are at about 60 degrees. So whereas the rears will have an effective rate of 180lbs the fronts will have an effective rate of 275 x sin 60 = approx 240lbs. so they are not as far appart as they at first seem.
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Monster_UK

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Reply with quote  #16 
Keith,

Thanks!  My mechanics is pretty good so I'm not sure why I didn't think of that!  It's obvious now (isn't everything once it's pointed out!).  Given I'm on the heavier side, I do think I'll need to stiffen up a bit at the back but I'm in no rush. 

Tim

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Reply with quote  #17 
...or get down the gym 🤣🤣🤣
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Monster_UK

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Reply with quote  #18 
All muscle already *cough* *cough* 😋
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Abe

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Reply with quote  #19 
Quote:
Originally Posted by Monster_UK
All muscle already *cough* *cough* 😋


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