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Discussion Starter · #1 ·
Which springs would be needed out of these to reduce side-ways roll, such as in hard turns on the road?


http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXDLB3&P=0- Red, 1.2mm
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXFRC2&P=0- Green, 1.2mm
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXFRC3&P=0- Blue, 1.3mm

http://www2.towerhobbies.com/cgi-bin/wti0095p?FVPROFIL=++&FVSEARCH=springs+savage&FVPROFIL=++&search=Go- RC Trix Springs.


Also, what are the effects of having softer and harder springs?


And what would happen if you had four blue springs on the outside, and 4 green on the inside shocks on a savage, how would it be predicted to handle?
 

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Star Guitar said:
Which springs would be needed out of these to reduce side-ways roll, such as in hard turns on the road?
I found that the RC Raven triple rates and 40 weight shock oil makes my Savage turn very flat, but is soft enough so it doesn't bounce over the rough stuff.


What weight shock oil do you run now?


Jerrah.
 

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Star Guitar said:
Also, what are the effects of having softer and
harder springs?
I believe that using soft springs - the truck
would be more likely to bottom out off jumps, and would roll in corners
- dive under brakes and squat under acceleration. Having mushy
suspension keeps your wheels on the ground when you're going over rocks
and bumps, allowing for better traction and acceleration and the truck
would probably sit lower in the suspension stroke. Hard springs would
take jumps without as much shock travel, roll less (but rebound faster)
etc etc. You also need to look at your shock oil weighting, and balance
them up for what you're trying to achieve.



Star Guitar said:
And what would happen if you had four blue
springs on the outside, and 4 green on the inside shocks on a savage,
how would it be predicted to handle?
I imagine it would be somewhere between using all blue, or using all green.
 

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Discussion Starter · #4 ·
I Run 30 wt oil all around.. Maybe i will try out the Tripple Rate Springs Instead.. How do you think they compare against the stock springs of the Savage .25?


jerrah said:
Star Guitar said:
Also, what are the effects of having softer and harder springs?
I believe that using soft springs - the truck would be more likely to bottom out off jumps, and would roll in corners - dive under brakes and squat under acceleration. Having mushy suspension keeps your wheels on the ground when you're going over rocks and bumps, allowing for better traction and acceleration and the truck would probably sit lower in the suspension stroke. Hard springs would take jumps without as much shock travel, roll less (but rebound faster) etc etc. You also need to look at your shock oil weighting, and balance them up for what you're trying to achieve.


Star Guitar said:
And what would happen if you had four blue springs on the outside, and 4 green on the inside shocks on a savage, how would it be predicted to handle?
I imagine it would be somewhere between using all blue, or using all green.
So all blue would make it mushy right? And all green is the same as having Savage .21 springs..


And what are the benefits of the RC Raven Tripple Rates compared to having say Blue Springs around the outsides, and Green Springs on the insides of the Savage?
 

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Disclaimer - I'm no expert with suspension - I'm sure there is more
experienced tuners around who can give better advice. Just my
opinions...


Star Guitar said:
I Run 30 wt oil all around.. Maybe i will try out
the Tripple Rate Springs Instead.. How do you think they compare
against the stock springs of the Savage .25?
I initially fitted
the triple rate springs with the stock shock oil - and the Savage
didn't bottom out as much but was wallowing all over the place in high
speed corners (worse than stock) but then I put in 40 weight shock oil
and it became an entirely different beast. Handling was flatter and the
initial stroke wasn't so soft. I like the handling characteristics of
the triple rates and 40 weight oil.
Star Guitar said:
So all blue would
make it mushy right? And all green is the same as having Savage .21
springs..
I don't know what the spring colours actually mean. I
found that the tighter the coil - the softer the spring was.
Star Guitar said:
And what are the benefits of the RC Raven Tripple Rates compared
to having say Blue Springs around the outsides, and Green Springs on
the insides of the Savage?
Well I would think of the springs as
a maths sum. With fixed rate springs - you could add each corner
together. So if you had a 3kg and a 5kg spring you'd have 8kg per
corner, or two 5kg springs you'd have 10kg. The triple rate springs -
are three different spring rates wound into a single spring. This gives
you (for example 1.5/3/7kg) multiple rates across the length of the
spring. So for the first part of the stroke if you had two triple rates
you'd have 3kg - but but by the time you got to full stroke you'd have
14kg. If I'm completely off track here - people are welcome to correct
me?

The ultimate result of this is that if you are running stiff constant
rate springs, the shocks will always be stiff with little give, but the
triple rate remains supple and soft initially, but won't smash your
bash plates into the earth as hard as soft constant rate springs.
 

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Discussion Starter · #6 ·
Jerrah said:
I don't know what the spring colours actually mean. I found that the tighter the coil - the softer the spring was.

I'm pretty sure its the opposite.


For example.. When you look at the stats of each spring the last numbers will be like 1.2mm. The lower the number means the spring is softer. Edited by: Star Guitar
 

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Star Guitar said:
Jerrah said:
I don't know what the spring colours actually mean. I found that the tighter the coil - the softer the spring was.

I'm pretty sure its the opposite.


For example.. When you look at the stats of each spring the last numbers will be like 1.2mm. The lower the number means the spring is softer.

Was Jerrah meaning that "tighter coil" = mores turns per spring? If so, I think progressive springs get tighter as the stroke increases. Therefore, tighter coil= stiffer spring. Also, for Star Guitar, if springs are the same material and coil, then a thicker gauge = stiffer spring.
 

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Star Guitar said:
Jerrah said:
I found that the tighter the coil -
the softer the spring was.
I'm pretty sure its the opposite.


For example.. When you look at the stats of each spring the last
numbers will be like 1.2mm. The lower the number means the spring is
softer.
The last number "1.2mm" is refering to the coil Diameter. First of all
- I doubt that has a direct effect on the spring strength other than
perhaps using more wire in the overall coil. The red springs were stock
on the Savage21 - I'm not sure how the black springs rate - but I
believe they're stiffer - how they compare to green and blue? Dunno.
I'm sure there is a FAQ somewhere on the internet.




Red: Softest:27 coils

Green: Intermediate:23.5 coils

Blue: Hardest(of the three):26 coils.




What is the specs of the stock black springs?




Then the guage of the wire comes into play as well I guess.




Regardless, with our triple rate springs, when they are compressed:
The tighter coiled sections compressed first, and the area with fewer
coils was the last to compress. This is just an observation though and
different springs will probably perform differently. I think I need to
do some spring technology research!
 

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sam__kent said:
Was Jerrah meaning that "tighter coil" = mores turns
per spring? If so, I think progressive springs get tighter as the
stroke increases. Therefore, tighter coil= stiffer spring.
I
did mean more turns per spring - however I have found that the fewer
turns part of the spring is harder to compress than that with more
turns.
 

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I couldn't find a good Spring FAQ in the ten seconds I was looking - but I did find a Spring Calculator. How useful or helpful it is I don't know...

A quote from the page says: "Why doesn't the number of coils per inch come into play? If you have ever looked at a progressive spring, you'll find that one end has the coils closer together than the other. The rate is constant across the spring regardless of the coil spacing. What happens is once you begin to use the spring, the coils that are close together finally touch (coil bind) reducing the number of free coils, (making the denominator smaller in the equation) and increasing the spring rate for the remaining unbound coils. cugino pegaso" Edited by: jerrah
 
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