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TRX4-XL "SUPERSIZER" -- another BIG RIG to challenge SCX6!!
- Thread starter WRXronald
- Start date
WRXronald
Rock Crawler
I kinda like the pins giving way before anything else -- -easy quick fix, extremely cheap too. BEEF the pin and break the axle instead --- well its a VITAVON RYFT Portal output shaft ---- they don't sell em separate from the portal kit for $220. Maybe they'd sell me an individual shaft who knows.
Ah well -- SCX6 axles eventually!!!
Here she is hittin' some tougher powder --- there are parts in this video where it just goes goes goes and even if it can't go forward its almost always still able to back out and get another running start!! Love it!!!
I got the 5mm bore 25T pinion today -- install tonight and then its geared 66% faster than in this vid!!! Not sure if the motor can handle that so that's what the 5065 big motor upgrade will be for if we get that far...
Ah well -- SCX6 axles eventually!!!
Here she is hittin' some tougher powder --- there are parts in this video where it just goes goes goes and even if it can't go forward its almost always still able to back out and get another running start!! Love it!!!
I got the 5mm bore 25T pinion today -- install tonight and then its geared 66% faster than in this vid!!! Not sure if the motor can handle that so that's what the 5065 big motor upgrade will be for if we get that far...
WRXronald
Rock Crawler
Got the 25tooth pinion installed on the 4250 motor 600kv -- step up from 15tooth --- quick 20 second test run in the dark in the driveway area --- IT RIPS!!!!
I think the 5065 may be wholly unnecessary --- early to say for sure but seemed to have plenty of torque on start ups in high gear climbing snow hills and plenty of slow speed control and precision still in low gear!!
And I just looked up these 4250 NEEBRC motors on Ali again -- they are showing up to 7s lipo for these motors --- I didn't realize could take the voltage -- so I can volt-up (gear up essentially) by another 75%. I'd say would be approaching 10mph at that point -- almost too fast.
Its an easy up-volt too -- already running 4s lipos -- just add a 3s in series with same MAH as the 4s block = voila 7s!!! LOVE IT!!
Speed test and more snow runs tomorrow hopefully!!!
I think the 5065 may be wholly unnecessary --- early to say for sure but seemed to have plenty of torque on start ups in high gear climbing snow hills and plenty of slow speed control and precision still in low gear!!
And I just looked up these 4250 NEEBRC motors on Ali again -- they are showing up to 7s lipo for these motors --- I didn't realize could take the voltage -- so I can volt-up (gear up essentially) by another 75%. I'd say would be approaching 10mph at that point -- almost too fast.
Its an easy up-volt too -- already running 4s lipos -- just add a 3s in series with same MAH as the 4s block = voila 7s!!! LOVE IT!!
Speed test and more snow runs tomorrow hopefully!!!
WRXronald
Rock Crawler
New pins held up solid to increased WHEEL SPEED!!! Vid below stepped up from 15 tooth to 25 tooth MOD1 pinion -- 66% higher gearing!!
Very exciting stuff -- I'm beginning to thrash it a bit harder, pull into throttle faster and with more impunity. So far, so good..... of course could break at any point.
From here, I think will gear up to 6s from 4s and continue sticking with the 4250 motor --- in this vid you can see its JUST beginning to sow the stages of not having enough torque to get the tires turning --- but ONLY when bound down heavily and in high gear... I quick shift to low gear gets out of the jam no problem. The bigger motor would like solve for this issue while at same gear ratios, of course with increased possibility of drivetrain carnage.
It now seems plenty fast enough -- 6s only get another 20-25% wheelspeed so LFG... I have an extra 2s 5200mah lipo sitting here so just need to solder up a three-way series plug adapter.
SCX6 transmission -- yep i'm impressed so far!!!
Very exciting stuff -- I'm beginning to thrash it a bit harder, pull into throttle faster and with more impunity. So far, so good..... of course could break at any point.
From here, I think will gear up to 6s from 4s and continue sticking with the 4250 motor --- in this vid you can see its JUST beginning to sow the stages of not having enough torque to get the tires turning --- but ONLY when bound down heavily and in high gear... I quick shift to low gear gets out of the jam no problem. The bigger motor would like solve for this issue while at same gear ratios, of course with increased possibility of drivetrain carnage.
It now seems plenty fast enough -- 6s only get another 20-25% wheelspeed so LFG... I have an extra 2s 5200mah lipo sitting here so just need to solder up a three-way series plug adapter.
SCX6 transmission -- yep i'm impressed so far!!!
WRXronald
Rock Crawler
Holy Jack cows batman!!! I had a spare 3s 5200mah 80c just laying around...... After an hour struggle trying to install the larger 5065 motor and failing (25t pinion has too large a diameter set screw collar area to fit in the SCX6 transmission mount -- i'll need a narrower neck to make it work or have a lot of bore-holing to do that's not worth it). It can be done but I think just need a differently created pinion style.
Besides that --- I had this 3s layin' around and the Ali specs for the 4250 outrunner rate it for up to 7s lipo!!!! Muhahaha.... lets see.. 4s + 3s = ? you betcha!!!
I wired up a 3 way series connector and now have 2s 5200mah + 2s 5200mah + 3s 5200mah for a total of 7s 5200mah 80c.....
Its WICKED.
I had to adjust the ESC programming a fair amount --- it doesn't seem to like high voltage + high brakes + high Sine-mode startup power.
So I nixed Sine mode startup altogether --- sacrificed a bit of low speed capability but honestly it still crawls VERY slow with insane TORQUE. Should still be good here but more testing to be done on rocks once snow clears out.
I came back off Regular mode Start-up power to 100 out of 150 (down from 150), and bumped timing up from 7.5 degrees to 22.5 degrees ---- this seemed to allow brakes to work well on 9 out of 10 setting. It stuttered strangley on high voltage when you push on the brakes hard (IE its stopped and you try to make it roll forward with outside force).... almost like the brakes couldn't hold or time correctly. weird. At 22 degrees and 1 of 10 Sine-mode start-up power the brakes were much better behaved --- I just had to give away that EXTREME slow speed start-up range -- honestly at 600kv, it was too slow to be practical anyways.
As for high gear, well lets just say Low gear now has just about EVERY drop of speed I could need -- even in the snow. In high gear, uh well yeah look out --- she ain't gonna last long lol!!!
SO SO SO FAST!!!! BLAZING!!! Throwing snow like nutso!!! Vid tomorrow I'm sure --- we'll see how long till it goes SNAPPO!!!
Will be FUN for a hot minute - if I'm careful and stick mostly to snow I might be ok. Gonna have to come back off for summer rock crawling --- it would never last with this kind of power in high gear --- would be full on ROCK BOUNCER capable (if things wouldn't break which guarantee they would break instantly -- still 32 pitch in the RYFT axles, etc 2.5mm pins).
Up to about 33lbs now (also added another 2200mah of 3s for the servo, went from 1800mah lipo and replaced with a 4000mah to longer runs between servo/radio system charges).
Should be fun in mud and snow and maybe I can just stay out of high gear during the summer crawler months -- only hit that for mudder days maybe! Low gear will be more than enough speed for those rock crawler BLIP the wheelspeed type moments... i'm certain of that. I'd say Low gear is now really quite close to the speed of high gear previously on 4s.
Besides that --- I had this 3s layin' around and the Ali specs for the 4250 outrunner rate it for up to 7s lipo!!!! Muhahaha.... lets see.. 4s + 3s = ? you betcha!!!
I wired up a 3 way series connector and now have 2s 5200mah + 2s 5200mah + 3s 5200mah for a total of 7s 5200mah 80c.....
Its WICKED.
I had to adjust the ESC programming a fair amount --- it doesn't seem to like high voltage + high brakes + high Sine-mode startup power.
So I nixed Sine mode startup altogether --- sacrificed a bit of low speed capability but honestly it still crawls VERY slow with insane TORQUE. Should still be good here but more testing to be done on rocks once snow clears out.
I came back off Regular mode Start-up power to 100 out of 150 (down from 150), and bumped timing up from 7.5 degrees to 22.5 degrees ---- this seemed to allow brakes to work well on 9 out of 10 setting. It stuttered strangley on high voltage when you push on the brakes hard (IE its stopped and you try to make it roll forward with outside force).... almost like the brakes couldn't hold or time correctly. weird. At 22 degrees and 1 of 10 Sine-mode start-up power the brakes were much better behaved --- I just had to give away that EXTREME slow speed start-up range -- honestly at 600kv, it was too slow to be practical anyways.
As for high gear, well lets just say Low gear now has just about EVERY drop of speed I could need -- even in the snow. In high gear, uh well yeah look out --- she ain't gonna last long lol!!!
SO SO SO FAST!!!! BLAZING!!! Throwing snow like nutso!!! Vid tomorrow I'm sure --- we'll see how long till it goes SNAPPO!!!
Will be FUN for a hot minute - if I'm careful and stick mostly to snow I might be ok. Gonna have to come back off for summer rock crawling --- it would never last with this kind of power in high gear --- would be full on ROCK BOUNCER capable (if things wouldn't break which guarantee they would break instantly -- still 32 pitch in the RYFT axles, etc 2.5mm pins).
Up to about 33lbs now (also added another 2200mah of 3s for the servo, went from 1800mah lipo and replaced with a 4000mah to longer runs between servo/radio system charges).
Should be fun in mud and snow and maybe I can just stay out of high gear during the summer crawler months -- only hit that for mudder days maybe! Low gear will be more than enough speed for those rock crawler BLIP the wheelspeed type moments... i'm certain of that. I'd say Low gear is now really quite close to the speed of high gear previously on 4s.
