New shocks and springs recommendation please - going for Protech

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lambo911
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New shocks and springs recommendation please - going for Protech

Post by lambo911 » Sat Jul 04, 2020 8:45 am

Here it is
20200504_132606.jpg
20200504_132606.jpg (177.33 KiB) Viewed 442 times
Rear shock, still lots of adjustment with a 12" spring
20200503_171938.jpg
20200503_171938.jpg (198.62 KiB) Viewed 442 times
Here is the front with a 350lb spring. I have had to wind it up quite a bit which is why I think a 12" would be better than a 10"
20200503_171852.jpg
20200503_171852.jpg (196.13 KiB) Viewed 442 times
Here is what is looked like with a 300lb spring with the coils very compressed
20200425_121722.jpg
20200425_121722.jpg (241.64 KiB) Viewed 442 times


Richard

1978 Scimitar SE6a MOD PS
1977 Scimitar SE6a MOD no PS
1986 Mercedes 190 2.3-16 Cosworth
1966 Jaguar s-type 3.8 MOD

Terry H
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New shocks and springs recommendation please - going for Protech

Post by Terry H » Sat Jul 04, 2020 8:54 am

I'd tighten the lock nut on the track rod end if I were you. Nice looking car.
Regards Terry H



PilotLight
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New shocks and springs recommendation please - going for Protech

Post by PilotLight » Sat Jul 04, 2020 10:38 am

Looks great
thanks.



lambo911
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New shocks and springs recommendation please - going for Protech

Post by lambo911 » Sat Jul 04, 2020 11:38 am

Terry H wrote:
Sat Jul 04, 2020 8:54 am
I'd tighten the lock nut on the track rod end if I were you
Don't worry this was done, I had to retrack it after it was lowered.


Richard

1978 Scimitar SE6a MOD PS
1977 Scimitar SE6a MOD no PS
1986 Mercedes 190 2.3-16 Cosworth
1966 Jaguar s-type 3.8 MOD

gtcse8
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New shocks and springs recommendation please - going for Protech

Post by gtcse8 » Sat Jul 04, 2020 6:19 pm

lambo911 wrote:
Sat Jul 04, 2020 11:38 am
I had to retrack it after it was lowered.
WARNING WARNING WARNING

ALL Scimitars need a run to settle the suspension BEFORE doing the tracking.

Because it uses unequal wishbones top and bottom if you jack up the front the wheels WILL tip in at the bottom, even if you lower the car the suspension WILL be wrong :w


Mark Wilson. Garage sale everything must go. :cry:1 SE6b, 1 GTC Shell &1 SE6a shell & a Triumph Daytona. Also on YouTube :wink: lookup V8 Chevy https://youtu.be/lbpvDGAMY6g https://youtu.be/7xTrbr0ETSA https://youtu.be/K7HfYVd5Flo

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Dennis Nicholas
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New shocks and springs recommendation please - going for Protech

Post by Dennis Nicholas » Sat Jul 04, 2020 7:06 pm

Sorry delay in answering....been having lots of house water/plumbing issues + just about everything else breaking that can. Including rear HOLLOW !!! anti toll bar on Skoda Yeti snapping off completely at one end!!!!.

Rears on SE6a Protech 451mm (17 3/4 inch) eye centre to eye centre fully open with 12 inch 225 lb inch springs. No problems with fitting and ride was not too soft/not too harsh. Remember rear of Scimitar is lighter than front. Achieving ride height was no problem getting chassis parallel to ground with front wishbones parallel to ground as recommended for standard in workshop manual.
Front as per my post above were 13.5inch 250 lb inch. Protech 390mm eye to eye fully open. The bottom spring seat was screwed up to make wishbone parallel to ground so that the 5th thread was just in the spring seat and the bottom of the seat was 3 1/8 inches above zero screwed up position. Thus this easily allows for the 14 inch spring instead of the 13.5 inch one that was allowing the bump stops to be hit on severe bumps.

I can't see any problem with getting 14 inch 250 springs.?? The car would still bounce the same amount but with the longer spring the damper rod would be extended by the extra 1/2 inch so bump stop on rod would not hit the barrel.

The photo above shows one of the springs bowing along its length.....this is due either to the spring ends not being ground parallel or not seating properly on the spring seats. Bowing is undesirable because it puts a sideward loading on the damper rod/seal in the barrel. Can be cured by putting a shim between spring and seat with max thickness vertically under where the spring bows out. You can prove this to yourself by hammering a screwdriver or other wedge between the bottom two coils and observing the vertical curvature of the spring changing.

Dennis


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1980 GTC Trafalgar Blue, 2010 basic Skoda Yeti (petrol), Austin 7s, Rileys.

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Dennis Nicholas
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New shocks and springs recommendation please - going for Protech

Post by Dennis Nicholas » Sat Jul 04, 2020 7:10 pm

WARNING WARNING WARNING

ALL Scimitars need a run to settle the suspension BEFORE doing the tracking.

Because it uses unequal wishbones top and bottom if you jack up the front the wheels WILL tip in at the bottom, even if you lower the car the suspension WILL be wrong :w
[/quote]

And camber and caster as well as tracking will need checking once springs settled.


Dennis Nicholas(RSSOC)
1980 GTC Trafalgar Blue, 2010 basic Skoda Yeti (petrol), Austin 7s, Rileys.

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ScimiTom
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New shocks and springs recommendation please - going for Protech

Post by ScimiTom » Wed Jul 08, 2020 4:18 pm

Well, in trying to figure out the best configuration based on everyone's experiences, I contacted Protech to request fronts at 14" x 250lb and rears at 12" x 225lb, and was told this is what I'll get instead:
400 series 2.25” id Front 400mm open (15.75”?) with 10” x 300lbs springs. Rear 464mm open (18.25”) with 12” x 250lbs springs

So, 10" x 300lb and 12" x 250lb... This setup is exactly what Richard was given last month and the front ones weren't right. I advised Tim (at Protech) of this, and of his discussion with Terry and Dave (referenced in Slice 293), and of Dennis' collaboration with Protech, all confirming that these figures don't work, but I have received no response since.

I never imagined there'd be such a range of opinion. There doesn't appear to be an 'agreed' spring length and force. It's a complete shot in the dark, as either nobody knows or nobody can express it with clarity. I might just stay put with the standard springs after all, because whatever I order is likely to be problematic in some way or other. Hmph... Moan over. :roll:


Current: 'Boffin' (1971 SE5a)
Previous: 'Sunshine' (1980 SE6b)

gtcse8
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New shocks and springs recommendation please - going for Protech

Post by gtcse8 » Wed Jul 08, 2020 5:14 pm

ScimiTom wrote:
Wed Jul 08, 2020 4:18 pm
I might just stay put with the standard springs after all
I would too Tom.
Yours is the lighter SE5 where most of the other suggestions are SE6 related.
I have always found the 10" springs front and 12" springs rear worked Ok and did not make the car look arse high/nose down.
If you get seat adjustable shocks you can get the correct stance AFTER the springs have settled.
I have a few sets of the Blue Standard springs for the front and all sorts of NEW and used different length and poundage rears.
Just my tuppence worth.
Last edited by gtcse8 on Fri Jul 10, 2020 7:58 am, edited 1 time in total.


Mark Wilson. Garage sale everything must go. :cry:1 SE6b, 1 GTC Shell &1 SE6a shell & a Triumph Daytona. Also on YouTube :wink: lookup V8 Chevy https://youtu.be/lbpvDGAMY6g https://youtu.be/7xTrbr0ETSA https://youtu.be/K7HfYVd5Flo

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AJL Electronics
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New shocks and springs recommendation please - going for Protech

Post by AJL Electronics » Wed Jul 08, 2020 5:47 pm

ScimiTom wrote:
Wed Jul 08, 2020 4:18 pm

So, I might just stay put with the standard springs after all, because whatever I order is likely to be problematic in some way or other. Hmph... Moan over. :roll:
That’s why I sell the Spax kit!


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ScimiTom
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New shocks and springs recommendation please - going for Protech

Post by ScimiTom » Thu Jul 09, 2020 11:17 pm

PM sent, Andy - I'm going with Spax.


Current: 'Boffin' (1971 SE5a)
Previous: 'Sunshine' (1980 SE6b)

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