LOSI LST XXL Conversion ideas

[jpoprock]

MC... You would think that I was a nervous nelly. But really.. I'm not AT ALL. I'm insanely curious and a sponge to know all kinds of crap. I grilled a client of mine for an hour on how to dig wells and septic systems! Will I ever do that? Nope, but I know three times more about it now, than I did when I woke up today! LOL!

Man.. I can't believe you do all that fine work that you do.... and you don't have any fancy tools! AMAZING!!!! Very impressive actually. I think you probably have a lot of what I don't have though.. and that is TIME. I'm 40yrs old with a working wife and two young boys... So time is something I don't have any of. I have no business having a hobby right now... but hey... a man has to have SOME fun huh?

Here is my favorite part about what you said...

"Jason, I don't have any of the fancy tools you listed. I'm an average Joe who drives a city bus. I just have a passion and patience for doing this stuff. Oh and one more thing... I'm also a lottery winner and worth about 6.5 million dollars. Oh, and I have a 12" penis. So life is really good."

Well played sir. Well played.

[mistercrash]

Originally Posted by jpoprock

"Jason, I don't have any of the fancy tools you listed. I'm an average Joe who drives a city bus. I just have a passion and patience for doing this stuff. Oh and one more thing... I'm also a lottery winner and worth about 6.5 million dollars. Oh, and I have a 12" penis. So life is really good."

All true, except for the 6.5 million dollar part

[mistercrash]

Since I have the T6 6061 alu sheet, I thought I would make a template of the final top plate that will help cutting the 2.5 mm CF plate that finally came in this morning. The CF plate is almost finished. I will post pics when it's done and then I should be able to start assembling the truck.



JAILBIRD

So what's the word on the HPI motor clamp?

[Chadworkz]

Originally Posted by mistercrash

Since I have the T6 6061 alu sheet, I thought I would make a template of the final top plate that will help cutting the 2.5 mm CF plate that finally came in this morning. The CF plate is almost finished. I will post pics when it's done and then I should be able to start assembling the truck.

WOW, just WOW! You did an excellent job on that upper template! Even though it is just a template for making the final CF part, the aluminum template is flawless, and worthy of being the main upper plate in any build! Anyone would be happy to run that top-plate and show it off...you did an amazing job on it!

[jpoprock]

How thick is yer CF plate going to be? Aren't you concerned with it not being durable for "bashing"?

[mistercrash]

The stock plate is 2.5 mm aluminum with a thousand holes in it for the tranny, the gears, the multitude of servos and what not. The CF plate is also 2.5 mm thick and has much less holes in it and CF is stronger than aluminum. If the stock aluminum plate is strong enough then the CF plate will be more than adequate.

On another note, I got myself a HPI FLUX motor mount to use for the rear of my 1521.

[Chadworkz]

Originally Posted by jpoprock

How thick is yer CF plate going to be? Aren't you concerned with it not being durable for "bashing"?

Like MC said, carbon-fiber is MUCH stronger and stiffer than aluminum, so there will be zero problems with strength or durability. In fact, the strength & durability of the carbon-fiber will be 10 times that of the stock aluminum...maybe even more!

[JThiessen]

Hey MC - I just noticed your location for the steering servo. It appears to be about a half a servo behind the stock location. What drove you to locate it there (I'm cutting my templates today....).

[JThiessen]

Originally Posted by JThiessen

Hey MC - I just noticed your location for the steering servo. It appears to be about a half a servo behind the stock location. What drove you to locate it there (I'm cutting my templates today....).

Hey - curiosity is killing me here man....

[mistercrash]

Sorry about that, It just seemed a proper location to me having it a bit further to the rear. It gives me more room for my thick fingers to work on it.

I just tried the truck again with a fresh set of 3S lipos. My batteries were empty before That was the problem. With a freshly charged set of 3S, the thing is a beast and there's plenty of top speed. So with more speed I was able to try to get the truck to flip on it's lid when cornering. Couldn't do it. The truck won't flip. Beautiful. I'm going to have fun with this thing. Gotta make a vid of this truck running.

[jpoprock]

If that is the case... then why do so many people say "If yer bashing go alum, if yer racing go CF"? What they are saying is... bashers shouldn't use CF cuz it's more prone to break. No? Now, I've heard there are different degress of CF too. Integy CF is not the same strength as say a Vantage I'd guess. I know for a fact that Integy aluminum may as well be "plastic" cuz it bends easily. So I have no doubt that Integy CF weak too.

[Chadworkz]

There are very few places where aluminum should be used, but there are a ton of places where carbon-fiber can and should be used. Quality carbon-fiber is not only stronger than aluminum, it is stronger than steel as well, and far lighter than both. Aluminum will bend and stay bent, where as in the same instance, carbon-fiber may flex, but it will return to its original shape/position without any breakage or problems.

A lot of "bashers" say to use aluminum because they just like the bling factor, but in most cases, aluminum is not a good choice for most applications. Of course, if you are talking about building a full-blown Unlimited Engineering Supermaxx, then aluminum is fine, because UE uses 7075-T6 aluminum which is MUCH stronger, harder, and more durable than the industry standard 6061-T6 aluminum. But again, if the part can be made out of carbon-fiber, it should be, because carbon-fiber is (as I have stated) so much stronger, stiffer, more durable, far lighter, and just plain looks cooler!

[nitrostarter]

MC! Great job there! Nice finish on the chassis and battery boxes!!

I didn't see where you stated your gear ratio.

I'm not sure what kind of top speed you are looking for but here is how I ran my 1521/1Y 6s powered LST XXL:

Differential Ratio: 3.3076923076923075
Transmission Ratio: 2.090909090909091
Other Ratio: 1
Spur Tooth Count: 63
Pinion Tooth Count: 26
Total Voltage: 22.2
Motor KV: 1577
Tire Diameter (inches): 6.6
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.008
Spur/Pinion Ratio: 2.42 : 1
Total Ratio: 16.7582 : 1
Tire Circumference (inches): 20.73 inches (526.66 mm)
Rollout: 1.24:1
Total Motor Speed: 35009.4 RPM
Vehicle Speed: 41.02 mph (65.89 km/h)
Effective KV Value: 1577
KT constant: 0.86 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

This was pretty quick for the LST and it's "MT" handling. Maybe your gearing is off? Not sure...

[mistercrash]

I think the E-Revo tranny I am using throws the data a bit. I have a 58 spur and a 22 pinion on right now. But I was also running lipos that were almost empty and the LVC kicked in after only 7 or 8 minutes of running easy. I only did one top speed run, maybe the voltage was just too low. I'll recharge the batteries and try again before I start playing with gearing. I might have to get other pinions from Mike as the biggest one I have is a 22. Going to nitro Revo spurs with matching pinions might be another option. But I don't think I'll have to go that route.

What springs were you running?

This is what I get from what's in the truck right now so it should've been more than adequate. As you can see, the E-Revo tranny ratio is very different from yours. I also chose the XXL tire option which is larger than what you have on your info. There's also a big difference in roll out from yours.

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1.8333333333333333
Other Ratio: 1
Spur Tooth Count: 58
Pinion Tooth Count: 22
Total Voltage: 22.2
Motor KV: 1577
Tire Diameter (inches): 6.75
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.008
Spur/Pinion Ratio: 2.64 : 1
Total Ratio: 15.98718 : 1
Tire Circumference (inches): 21.21 inches (538.63 mm)
Rollout: 1.33:1
Total Motor Speed: 35009.4 RPM
Vehicle Speed: 43.97 mph (70.64 km/h)
Effective KV Value: 1577
KT constant: 0.86 oz-in/A

This is what I get if I choose the same size tires as yours. It still shows plenty of top speed.

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1.8333333333333333
Other Ratio: 1
Spur Tooth Count: 58
Pinion Tooth Count: 22
Total Voltage: 22.2
Motor KV: 1577
Tire Diameter (inches): 6.6
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.008
Spur/Pinion Ratio: 2.64 : 1
Total Ratio: 15.98718 : 1
Tire Circumference (inches): 20.73 inches (526.66 mm)
Rollout: 1.30:1
Total Motor Speed: 35009.4 RPM
Vehicle Speed: 43 mph (69.07 km/h)
Effective KV Value: 1577
KT constant: 0.86 oz-in/A

Yes videos please! If this thing is have as good as your e-revo I'm sure we will all be very impressed!--josh