CRT.5 Big Bore Shocks done easy & cheap

[GO-RIDE.com]

Those are the right shock bodies, but the springs and pistons will be too stiff for a crt.5. You need the Jato (1.4mm hole) pistons and Jato (pink 1.4) springs to work with the CRT.5.

Originally Posted by GO-RIDE.com

Those are the right shock bodies, but the springs and pistons will be too stiff for a crt.5. You need the Jato (1.4mm hole) pistons and Jato (pink 1.4) springs to work with the CRT.5.

if I get the jato plastic ones at tower i wont need the 1.4 jatp pistions?...just the 1.4 pink springs

[GO-RIDE.com]

Originally Posted by bustitup

if I get the jato plastic ones at tower i wont need the 1.4 jatp pistions?...just the 1.4 pink springs

That is correct, but pistons are super cheap. Amain has a 6 pack of pistons (1.3, 1.4, 1.5) for $3, or you can drill out the Slayer/Revo pistons that come with the shocks.

[magman]

I did the mod to my crt.5....

Thanks for the tip. The front suspension is perfect. I am still working on the rear to get it to my liking

[GO-RIDE.com]

Originally Posted by magman

I did the mod to my crt.5....

Thanks for the tip. The front suspension is perfect. I am still working on the rear to get it to my liking

The new chassis looks awesome. I'll be getting one down the road to replace my original RCM .5 chassis.

For rear shocks I've found that 1.5 pistons are key for good handling the bumps. I use 30 or 35 wt Losi oil with them.

well in that case I will get the revo/slayer shocks ...i kind of like the aluminum bodies..... thaks man very helpfull

[magman]

I believe that my springs are too stiff..I tried oils from 20 to 50w with out desired results. I was thinking of drilling out the holes in the pistons a little bigger to allow more oil to flow better.

what tires and wheels are those?

Originally Posted by GO-RIDE.com

If you've spent any time driving the crt.5 hard you know the front shocks are way over leveraged and even with thick oil and single hole pistons they bottom out much too easy. I've seen a number of guys who have gone to the Ofna DM1 front shocks, but they have some draw backs too. 1. They are expensive $100+ if you have to piece them together. 2. They don't have as much stroke as the stock shocks, so you lose some travel.

So, after taking some careful measurements and doing a bit of research I found the Revo/Jato shocks fit the front of the crt.5 very well if you mount them in the body mount holes. This gives them a very RC8 look. I've only had a chance to test drive them a few minutes, but so far they are very good. With the old shocks when I dropped my car from 6 - 8" the chassis would slap firmly. With the new shocks I can drop it from 15+" and only the back will slap. Yet, I still get perfect sag/ride height.

Here's what I used:
1. $27 - Pair of revo/jato shocks (includes pistons & oil)
2. $5 - Ofna shock stand offs (ofna 36610) (4pc, only need 2)
3. $5 - Jato 1.4 shock springs
4. $2 - (2) 3mm x 35mm button head srews
5. $2 - (2) ofna 6mm ball (ofna 30403) (comes in a pack of 6 for $5)
Misc: a few random washers, (2) 3mm locknuts

Here’s what I did:
The shocks come pre-built, but not filled with oil.
1. Disassemble the shock per included instructions to remove both the installed piston (revo) and the blue bottom out bumper. The installed piston is for the heavy revo and the bottom out bumper is way to stiff to compress with a crt.5. If you don't want to disassemble you can easily cut the blue bumper off and the piston is replaceable through the top of the shock.
2. Reassemble the shocks with the Jato (grey) #14 piston, 30 wt oil, and Jato 1.4 spring. The 30 wt oil seems great for bashing, but I might try 25 wt for a slippery track. If you are running a heavy battery you may want the 1.6 spring.
3. Removed the flanged ball from the lower shock eyelet. Replace it with the ofna 6mm non-flanged ball (or similar item).
4. Drill a hole all the way through each of the plastic front body mounts. I used a drill bit a little smaller than the existing hole and drilled that hole all the way though the plastic.
5. Assemble the upper shock mount as follows: (35mm screw, washer, shock, washer, ofna stand off).
6. Thread the screw all the way through body mount and add a washer and lock nut to the back. After first testing this I added a 2mm shock spacer between the washer and stand off to further get the shock away from the shock tower so the preload adjuster will freely spin.
7. Mount the lower shock eyelet in the outside hole.
8. Set your ride height
9. Admire your work with a cold beverage
10. Get your bash-on

Top view of the mounting setup.


Back view of the mounting setup.


Full droop brings the shock to full length. You have to use internal shock spacers if you don't want full droop.


Even with 2.2 truck tires the wheels will come off the ground about 5mm with the front of the chassis on the ground.


Let me know what you think.

I do plan on getting the Jammin X1 CR front shocks for the back of the CRT.5, but the front shocks are the ones that need the help the most. After dialing in the front Revo shocks I rebuilt my stock rear shocks with white springs, single hole pistons, and 40 wt. oil. They can just about handle as much compression load as the big bore fronts, but they rebound a bit slow for ultimate handling. A set of 13mm rears would be great if I can find a set of long springs that are soft enough for the light crt.5.

wow...finished the front shock mod with the aluminum revo/slayer shocks for 14 bucks....drilled out the pistons with 1.5 and the truck lands so much better its amazing

what should I do to the rear now ?...keep my stock rear and change springs to what?

[rschoi_75]

Yeah, this mod is well worth the time and effort. For the rear you should hook up some 1/8 buggy front shocks. Pretty much any will work. Just swoop in on a cheap auction on ebay and get the corresponding mounts for them. I'm using some ofna ultra lx front shocks that I got for $8 + shipping.

[GO-RIDE.com]

Originally Posted by bustitup

what tires and wheels are those?

Those were some cheap pre-mounted GRP tires and wheels from towerhobbies. The knobs started peeling off pretty quick and the molded foams are too stiff even for the heavy crt.5 I would only recommend them for bashing, but the road tire version are good for parking lot fun.

[jnev]

bustitup - I am using the same shocks as rschoi is...
http://cgi.ebay.com/NEW-OFNA-Front-S...QQcmdZViewItem
Three minutes left in the auction. There are many similar shocks on ebay though that would work just as good.

Originally Posted by jnev

bustitup - I am using the same shocks as rschoi is...
http://cgi.ebay.com/NEW-OFNA-Front-S...QQcmdZViewItem
Three minutes left in the auction. There are many similar shocks on ebay though that would work just as good.

I ended up getting these for about $18 shipped....springs should be ok?

http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA:IT&ih=001

[GO-RIDE.com]

Originally Posted by bustitup

I ended up getting these for about $18 shipped....springs should be ok?

http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA:IT&ih=001

Those are the same ones I use on my "Monstered" e-crt.5. The yellow springs work great. I cut 2 coils off of each spring so I could get the ride height I wanted, but the overall spring rate is very good.

The stock pistons are 1.4mm holes, but I like 1.5mm hole pistons with 35 - 40wt oil if you drive at a track. If you are just bashing then the 1.4mm pistons with 20 - 25 wt oil.

[rat]

guys..what an awsum thred good work..