LOSI LST XXL Conversion ideas

[brian015]

This should fit:

8E heatsink

[mistercrash]

Thanks. Nice one, and I love that it's from Losi. I ordered one. I think it should help a lot.

[brian015]

I looked at that one for my build, but I don't have room for those fins with my rear bulkhead brace. So I've been working on a custom heatsink made from flat, square, cpu sinks!

edit: I want to know how the heck that rock got in there too.

[mistercrash]

Originally Posted by brian015

I want to know how the heck that rock got in there too.

I still don't have the answer to that one.

I received my CC BEC today. Nice little thing, I replaced the blue heat shrink with a stronger one that has glue in it and has a shrinking of 3 to 1. So now both ends are sealed around the wires and will keep dirt, dust and water out of it. Now to decide where I will put it on the truck. I thought of just sticking it to the MMM with double sided tape. Since I don't use a switch, I cut off the part of the MMM mount that houses the switch so there is a space on the MMM casing behind the caps that looks big enough to stick the BEC to.

[mistercrash]

The CC BEC is installed and it's working great. I updated it to 6 volts and I noticed the difference on the steering servo. Quite a bit faster and torquey. I like it and it was easy to install. I chose to stick it to the MMM because when I need to remove the ESC, the BEC just comes with it. So does the cap bank the way I have everything set up.

[nuz69]

Hello,
this kind of temp seems to be normal as the hot weather, the weight of the truck and the no-finned can. Try to open your body, airflows can change everything !

[mistercrash]

The motor gets plenty of air flow so what it needs is a means to dissipate the heat using that air flow. So I'll take it easy on the motor until my Losi heat sink arrives. I'm hoping it will bring the motor's temp down enough for me not to worry about it anymore. This motor won't last very long if I run it at 200 degrees all summer. If this large heat sink can drop the temp to 180, I'll be happy. Any lower and I'll be very very happy.

[Bondonutz]

Looks good Ray.
The aluminum duct work tape is the easiest way to block off them holes, Shoe-Goo around the wires does work very well but needs to dry a long while.

[Manne]

Sounds Fairly good then except the lipos temp. Maybe 5000mah 20C don´t quite cut it?

"My old E-Revo would have been in pieces if I subjected it to what I do to this XXL."

So you are saying that the Lst is tougher then huh HUH!?

I really like this build now Mc, you are truley a real enthusiast ( or how it´s spelled )

[brian015]

I just happened to come across these:

http://cgi.ebay.com/Losi-LST-Shock-s...item2eae749e8d

4.93mm diameter

quote: "These are replacement shock shafts for the Hot Racing Reservoir Shock Shocks that fit the Team Losi LST ( lst255r06 lst255r08 )."

[mistercrash]

Brian I saw those and even though they look really nice, they are to short for the LST2 shocks I'm using. IMO, the only way to make them work properly with the LST shock cartridges is to do exactly what I plan to do which is to open the cartridge, enlarge the holes for the shaft and replace the O rings with ones with a thinner cross or thickness. Unless the Hot racing reservoir shocks use a cartridge that fit the LST2 shock body. I'm not sure. Maybe they could work but I wouldn't get the full extension that I have with the stock length of the shock shafts, it is something like 87 mm long if I remember correctly. Thanks for searching I appreciate it.

On an another note, I gave up on my E-Revo to go with the LST because I find it is tougher and easier to work on. But there are things on the E-Revo that I really liked. The tranny for one which I installed on the LST but also the Traxxas VDPs (Variable Damping Pistons) in the shocks. So I am going to try it on the LST with these little valves I made out of a piece of thin polycarbonate from some packaging that was lying around in the recycling bin. I know Hot racing makes pistons with tapered holes which are supposed to have the same effect, I'm just trying to do it on the cheap.
The valves block 10 of the 24 holes of the piston on compression which should give better, stronger damping, and the valves bend slightly to let the oil pass through all 24 holes of the piston on the rebound.



I made a second 5 mm shock shaft and ordered the Viton O rings I linked before. When all the parts get here, I can finally try out those shafts on the front end with the VDPs front and rear.

[brian015]

Originally Posted by mistercrash

Brian I saw those and even though they look really nice, they are to short for the LST2 shocks I'm using. IMO, the only way to make them work properly with the LST shock cartridges is to do exactly what I plan to do which is to open the cartridge, enlarge the holes for the shaft and replace the O rings with ones with a thinner cross or thickness. Unless the Hot racing reservoir shocks use a cartridge that fit the LST2 shock body. I'm not sure. Maybe they could work but I wouldn't get the full extension that I have with the stock length of the shock shafts, it is something like 87 mm long if I remember correctly. Thanks for searching I appreciate it.

On an another note, I gave up on my E-Revo to go with the LST because I find it is tougher and easier to work on. But there are things on the E-Revo that I really liked. The tranny for one which I installed on the LST but also the Traxxas VDPs (Variable Damping Pistons) in the shocks. So I am going to try it on the LST with these little valves I made out of a piece of thin polycarbonate from some packaging that was lying around in the recycling bin. I know Hot racing makes pistons with tapered holes which are supposed to have the same effect, I'm just trying to do it on the cheap.
The valves block 10 of the 24 holes of the piston on compression which should give better, stronger damping, and the valves bend slightly to let the oil pass through all 24 holes of the piston on the rebound.



I made a second 5 mm shock shaft and ordered the Viton O rings I linked before. When all the parts get here, I can finally try out those shafts on the front end with the VDPs front and rear.

Yeah - I couldn't remember the length of the LST shock shafts - I guess those are closer to the muggy shock length.

Anyways - I'm interested to see how you like your VDP setup - I'm pretty happy with the rc-raven springs on my big truck - but I could definitely see this helping - I have some .030 lexan I might try out.

[mistercrash]

Originally Posted by brian015

I'm interested to see how you like your VDP setup - I'm pretty happy with the rc-raven springs on my big truck - but I could definitely see this helping - I have some .030 lexan I might try out.

.030 will be too thick and too stiff. The valves won't bend up to let the oil flow through. The ones I made are .006. The thinner the better actually but it still has to be just stiff enough to hold it's flat shape when resting and flexible enough to bend slightly to let the oil flow.

[brian015]

Originally Posted by mistercrash

.030 will be too thick and too stiff. The valves won't bend up to let the oil flow through. The ones I made are .006. The thinner the better actually but it still has to be just stiff enough to hold it's flat shape when resting and flexible enough to bend slightly to let the oil flow.

You're probably right - i have some thinner lexan I can try.

[Finnster]

Originally Posted by mistercrash

Brian I saw those and even though they look really nice, they are to short for the LST2 shocks I'm using. IMO, the only way to make them work properly with the LST shock cartridges is to do exactly what I plan to do which is to open the cartridge, enlarge the holes for the shaft and replace the O rings with ones with a thinner cross or thickness. Unless the Hot racing reservoir shocks use a cartridge that fit the LST2 shock body. I'm not sure. Maybe they could work but I wouldn't get the full extension that I have with the stock length of the shock shafts, it is something like 87 mm long if I remember correctly. Thanks for searching I appreciate it.

On an another note, I gave up on my E-Revo to go with the LST because I find it is tougher and easier to work on. But there are things on the E-Revo that I really liked. The tranny for one which I installed on the LST but also the Traxxas VDPs (Variable Damping Pistons) in the shocks. So I am going to try it on the LST with these little valves I made out of a piece of thin polycarbonate from some packaging that was lying around in the recycling bin. I know Hot racing makes pistons with tapered holes which are supposed to have the same effect, I'm just trying to do it on the cheap.
The valves block 10 of the 24 holes of the piston on compression which should give better, stronger damping, and the valves bend slightly to let the oil pass through all 24 holes of the piston on the rebound.



I made a second 5 mm shock shaft and ordered the Viton O rings I linked before. When all the parts get here, I can finally try out those shafts on the front end with the VDPs front and rear.

Hey, I just wandered into this thread and saw this mod. I was actually looking at this myself, but was thinking about boring out to 6mm, as I wasn't sure 5mm would cut it. (Had integy lst shocks from a muggy at one point w/ 5mm shafts, but they were soft and bent easy too)

Basically I have LST shocks on my savage, but the shafts always bend or snap at the shock end. I took apart the cartridge the other night and saw how it was built and seemed like it could use a much thicker piston rod. Just need a lathe or something to cut 5mm threads on it.....Dunno if a hand die would work well, or if the rod finish would be too rough.

Material: Multipurpose 4140/4142 Alloy Steel

Alloy: 4140/4142

Finish/Coating: Ground

Shape: Rods and Discs

Diameter: 6 mm

Diameter Tolerance: -0.0005"

Tolerance: Precision-Ground

Temper/Condition: Annealed

Hardness: Rockwell B92

Maximum Attainable Hardness: Rockwell C50-C55

Yield Strength: 60,000 psi
----

Too bad you are selling, looks like nicely made truck