Get rid of rear end sag?

[swamp_life trx]

Well I put my vxl system in the slash to see how it would run with 3s lipos.... The rear end almost touches the ground on take off with this system. I've put 50w oil and black springs in the rear shocks and still sags!!!
Wat do I need to do to stop this?

I imagine it will get worse with the big block installed.
Any suggestions will help.


Sent from my VS920 4G

[Petertje60]

Stronger springs will help.

[james22]

I put Black springs in the rear of mine with 60wt shock oil and that helped it alot, but you have already done that....

I run dual 2s lipo's in mine and its not too bad. Are the 3s significantly heavier?

[Petertje60]

Since the size is about the same and the capacity of a 3S will be lower at the same size, I dont think there will be much weight difference. My 2S SPCs are the heaviest ones I have. But also the most powerful.

Shock oil helps to prevent sagging during driving, but if you want it higher on its feet, you have to use stronger springs.

[swamp_life trx]

Its not the weight of the 3s lipos. Wat other springs can I use with the stock shocks? I've already got the black coded springs on it now.

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[chilidillo]

On jimbo74's recommendation I got Ace Hardware springs - no sag anymore! search Ace SP-9728

[swamp_life trx]

I'll try those!! I've got an ace right around the corner.

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[CarGuy7a]

I also run the Black Stripe springs on mine and it also sags like crazy in the rear. I think alot of it is because actually the Black springs are the shortest in length which makes absolutely no sense. If you look at the specs of the springs on tower hobbies site it lists the spring length. The stiffer the springs the shorter they are. Makes no sense to me Why couldn't they have just made them all the same length?

Orange is 23mm long
Green 22mm
Tan 20.6mm
Black 19.75mm

[chilidillo]

Try here:

http://www.amazon.com/gp/product/B00..._ya_os_product

[jimbo74]

i also run front rocker arms on the rear

[50togo]

You could run summit springs. They are much stronger and a little taller.
Traxxas 7246 3.2 spring rate purple stripe

[jimbo74]

the ace hardware springs are a lot stiffer than anything traxxas offers

[flanders125]

A bike or treadmill might help with your rear end sag


Sent from my iPhone using Tapatalk because I'm bored at work

[50togo]

I meant stiffer than the black stripe springs.
depending on the driving conditions they could be perfect

[Cipher_Jones]

I find the GPM shocks to be perfect. If you can find the silver or gold springs for those shocks sold separately it will fix the sag for sure.

[swamp_life trx]

I find the GPM shocks to be perfect. If you can find the silver or gold springs for those shocks sold separately it will fix the sag for sure.

Will these work with the big block?

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[50togo]

They should work not as big as my exotek shocks. Another reason I went with my neu 1110. Don't have to worry with springs either their pretty strong

[Cipher_Jones]

Will these work with the big block?

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Yeah, I have a tbone, steel roll cage and 2 NiMh packs. It weighs as much as a rusty.

[swamp_life trx]

Awesome great info!! I ordered a pair for the rear. The stock shocks with tan springs to very well up front.
Oh and I did put front rockers on the rear also.

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[CarGuy7a]

I went through all my springs today to see what I had. I've been running the short black stripe springs and thought that was the stiffest I had but found out they weren't. I had a set of Blue stripe and Pink stripe. I couldn't find any info about them as far as spring rate but dug around enough and found out that the blue and pink are summit springs and they are alot stiffer than the Black stripe.

7245 Blue 2.925 rate
7244 Pink 2.77 rate

I also took my Black stripe springs off the shock and stretched them out from 19.75mm length to 23mm. Soo much better. I don't have my pre load collars screwed down to the bottom of the shock anymore. I have them about three turns down from the shock cap and it's sitting up pretty good now. It's was worth a try and it paid off.

[jimbo74]

7145 Spring, shock (GTR) (1.76 rate, orange) (1/16 E-Revo)
7146 Spring, shock (GTR) (1.92 rate, green) (1/16 E-Revo)
7147 Spring, shock (GTR) (2.06 rate, tan) (1/16 E-Revo)
7148 Spring, shock (GTR) (2.22 rate, black) (1/16 E-Revo
7244 Spring, shock (GTR) (2.77 rate, pink) (1/16 Summit)
7245 Spring, shock (GTR) (2.925 rate, blue) (1/16 Summit)
7246 Spring, shock (GTR) (3.2 rate, purple) (1/16 Summit)

[airmaxx23]

Squats and lunges should help with the saggy rear end....


Sorry, had to say it.

[erx4x4]

i found the stock springs did better than the black for this problem also crank your preload up a bit

[CarGuy7a]

i found the stock springs did better than the black for this problem also crank your preload up a bit

What you are noticing there is the actual springs length. The rear will sit up higher with stock springs because they are 23mm long where the black springs are only 19.75mm. On these small shocks that difference is huge.

Hey jimbo, what shock oil do you run? I run 55wt with the black springs and it's very bouncy. Almost like a 1:1 car with a bad shock how they bounce like crazy. I have some 80wt I may try.

[jimbo74]

i run 5000 weight diff oil with ace hardware springs on my stock shocks, little to no pre-load

[Ed_72455]

Well I put my vxl system in the slash to see how it would run with 3s lipos.... The rear end almost touches the ground on take off with this system. I've put 50w oil and black springs in the rear shocks and still sags!!!
Wat do I need to do to stop this?

I imagine it will get worse with the big block installed.
Any suggestions will help.


Sent from my VS920 4G

is this the 1/10 or 1/16th?

[swamp_life trx]

1/16 with a 1/10 motor and esc.

Sent from my VS920 4G