General TR Lever Shock - HD Shock Valve

[RJS]

Hi

I am looking to upgrade my lever shocks. They are in good shape and do not need rebuilding. But, I am considering replacing the oil with a SAE-30 non detergent oil (likely motorcycle fork oil) and installing these HD Shock Valves (+25%)

Heavy-Duty Shock Valves

Heavy-Duty Shock Valves

mossmotors.com

I have a 1966 TR4A with original rear springs. I saw these in the Moss TR250/TR6 catalogue. They are not to be found in the TR2, 3, 4 catalogue. And on the website, they are listed for use in an MGB. I think they are all the same so I am not too concerned.

Mostly interested if anyone's installed these HD Valves and what your thoughts may be

Thanks

Bob

 

[ed_h]

You should make one change at a time. The 30 wt may be enough to give you what you want.

It's a hydraulic application, so a hydraulic oil is appropriate. Shock oil and fork oil are both hydraulic oils.

Ed

 

[Tybalt]

You need to keep in mind that damping characteristics are tuned to the car weight, suspension system and spring rates. Thinking in terms of the rear springs for the MGB in the BMC Special tuning manual, even the stiff springs there had much lower spring rates than those for the Triumphs and the heavy duty front and rear damper valves listed by Moss for the MGB (probably either replicas or if still available from Armstrong the same ones listed in the BMC Special Tuning manual for the MGB) would probably not be well suited to the Triumphs.

Instead, you might want to take a look at this and develop a plan:

http://www.trtriumph.com/Armstrong shock absorber adjustment.pdf

Or give the folks at Apple Hydraulics a call or e-mail and talk with them about their heavy duty Triumph rear dampers. There were externally adjustable dampers from Armstrong as well for the MG but very rare. Apple offers rebuilding service on those but you have to send them the dampers, no core program on those. They might be able to tell you if there is sufficient adjustment range to make them suitable for a Triumph. Of course that would mean that you would need to find a set if they said it could be done. I grew up around these cars when they were new and with lots of trips through the BMC Special Tuning parts inventory at Overseas Motors in Fort Worth (BMC/BL distributor that ran three different MGBs in E prod until BL management effectively shut down BMC Special Tuning) and I have never seen a set, only pictures.