Does anyone here revalve/freshen their own racing shocks? I started doing my own QA1's this year and was wondering if anyone has experimented with different brands and weights of shock oils.
Thanks
Wayne
Thanks
Wayne
Racing shock oil
- Thread starter bullittwrench
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a lot of them out there with vis all over the place I guess settle on one and stick to it shock oil vis WILL affect damping
yes i do, but on a dirt bike.
I do the same an sunruh.
as a matter of fact, i'm about to try out some new non-newtonian oil. others i have talked with say it is great.
at $100 for a single change. it better be!!! (ie that is almost 33 per qt)
at $100 for a single change. it better be!!! (ie that is almost 33 per qt)
Originally Posted By: sunruh
as a matter of fact, i'm about to try out some new non-newtonian oil. others i have talked with say it is great.
at $100 for a single change. it better be!!! (ie that is almost 33 per qt)
What oil and how did it work?
as a matter of fact, i'm about to try out some new non-newtonian oil. others i have talked with say it is great.
at $100 for a single change. it better be!!! (ie that is almost 33 per qt)
What oil and how did it work?
I always used to use Silkolene Pro RSF, but haven't done any re-valving/rebuilding for a number of years.
There is a very good spec chart here http://www.peterverdonedesigns.com/lowspeed.htm if you scroll down the page.
The best fluid specs I've seen in terms of VI are blended by bruce381, so you could PM him or drop him a line.
If I was still doing any shock work I would be using the fluids Bruce blends.
There is a very good spec chart here http://www.peterverdonedesigns.com/lowspeed.htm if you scroll down the page.
The best fluid specs I've seen in terms of VI are blended by bruce381, so you could PM him or drop him a line.
If I was still doing any shock work I would be using the fluids Bruce blends.
Latest shock oils we have now push a VI of about 550.
Originally Posted By: sunruh
as a matter of fact, i'm about to try out some new non-newtonian oil. others i have talked with say it is great.
at $100 for a single change. it better be!!! (ie that is almost 33 per qt)
That's what Redline costs downunder, so for a shock oil, sounds like a deal.
as a matter of fact, i'm about to try out some new non-newtonian oil. others i have talked with say it is great.
at $100 for a single change. it better be!!! (ie that is almost 33 per qt)
That's what Redline costs downunder, so for a shock oil, sounds like a deal.
even had some around 620 but they are way thin vis @ 100 is around 6 cSt.
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so far i've only used it in the shock (been playing with the forks too much), but here is a link to their site.
http://www.smartperformanceinc.com/215VM2K5.html
http://www.smartperformanceinc.com/215VM2K5.html
Originally Posted By: sunruh
so far i've only used it in the shock (been playing with the forks too much), but here is a link to their site.
http://www.smartperformanceinc.com/215VM2K5.html
It says Product Data Sheet but there aren't any tech specs there ??
It just reads as an advertising brochure.
I won't use a fluid unless I have the viscosity at 40*C and 100*C.
so far i've only used it in the shock (been playing with the forks too much), but here is a link to their site.
http://www.smartperformanceinc.com/215VM2K5.html
It says Product Data Sheet but there aren't any tech specs there ??
It just reads as an advertising brochure.
I won't use a fluid unless I have the viscosity at 40*C and 100*C.
explain how you test the viscosity of a non-newtonian fluid please.
you are not understanding the fluids properties and therefore the question.
OK, what sort of non-Newtonian fluid is it for starters ?
What are it's characteristics ?
Then, it will still exhibit a certain viscosity at 40*C and 100*C in an unstressed/unsheared state.
The rebuilder/revalver has to know if this fluid is comparable with the viscosity of fluids they've already been using. The 'data' sheet tells me nothing.
What are it's characteristics ?
Then, it will still exhibit a certain viscosity at 40*C and 100*C in an unstressed/unsheared state.
The rebuilder/revalver has to know if this fluid is comparable with the viscosity of fluids they've already been using. The 'data' sheet tells me nothing.
Originally Posted By: sunruh
you are not understanding the fluids properties and therefore the question.
Like what ?
Increase the shear rate (turn it faster), and measure the viscosity...
Plot shear rate against visosity.
IMO, a machine similar to an HTHS would be easier than producing/calibrating a viscometer that was like a syringe, where you would have to include allowances for inertia and acceleration.
you are not understanding the fluids properties and therefore the question.
Like what ?
Increase the shear rate (turn it faster), and measure the viscosity...
Plot shear rate against visosity.
IMO, a machine similar to an HTHS would be easier than producing/calibrating a viscometer that was like a syringe, where you would have to include allowances for inertia and acceleration.
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