I owned the original hotshot back in the 80s, I crashed that car at full speed and only broke the front bumper. We used to play crash up derby with about 8 cars, I hit a car head on and their car flew up in the air at least 2’ high with NO damage to my car or his, these car were built like tanks
That is indeed a nice buggy. It's an original Hotshot with SuperShot underbelly and an ESC! I have much run-time with these nice cars. The flaws, to my experience, is cracking of upper and lower rear arms, cracking of front uprights and slack in upper front arms due to wear on the upper gearbox mounts. Collisions may cause damage to suspension arms as well as to front gearbox in way of arm mounts but also possible cracking to the forward self tapping screw mount below the stabilizer base. I know CRP had supports for the upper front arms but such upgrades were not available here where I live so I have not tested them. Also, the 8 mm ball connectors suffer from wear. If there is wear and slack in the front suspension the twin shock solution works far better than the mono-shock does.
Thank you for the info. Yes, this car has a tremendous number of flaws. This particular one was given to me by a friend for the MIP ball diff design and build. This car is the one with the MIP prototype parts that was used for mock up and testing and as such, got some abuse. I am looking forward to driving it and agree that the mono shocks are awful but I must say that for me, they give the car the look that tells me it is a hotshot. The complexity in the rear is so ridiculous you need to love it!
🙂👍Nice! I have a old hop up part from CRP on my hotshot it is a piece that connects across the top gearbox in front and across with a hole on each side that the front a arm pins go through it strengthens the front supposedly may be a good part to make also.
First off I love all your videos and your contributions to these old cars, I’m an ORV guy and your rear suspension is amazing, please do a front a-arm suspension for the ORV chassis, I made one out of PLA that is 5mm wider per side than stock and it helped a ton, more than happy to send what I have as a starting point, I really like your keep it Tamiya-ish design approach
Thank you so much! I will be doing a front end for the ORV for sure! Right now I have no idea what path ill be going down but it will change the whole front end.
awesome! I liked their cage frame idea a lot, it just wasn't all that well executed. Tamiya should re-visit to develop something newer and better instead of "let's do a re-re!". I can picture a Grasshopper/Fox RWD type hybrid, is pretty decent gearbox+IRS (also allows using 3-4 different size pinion gears, motor mounted low+behind), then go a F/E something more like a Blitzer. if they started messing around like that, taking notes from past mistakes (classic or not!), they could produce some really cool new units that'd maybe even compete. Alberto I forget which one it was you planted an Associated Stealth transmission into, but its exactly the kind of thinking Tamiya really needs to start doing! the ORV cage concept has the potential of being light and rigid, as well as giving pretty easy access to any-everything, what's not to like? (ain't gonna list all the real problems of the ORV's, it's so long!) this could be some decent $$ for someone good with 3D scanning, modifying, and 3D printing, selling them the designs and geometries for a price plus a percentage. flipping the geometry inside out for a CNC to carve plastic injection molds isn't rocket science to people having the machine skills. it's possible a lot of their existing molds could be modified fairly easily too (if they have 2-3 sets, alter one for "new"). my OLD Fox is love/hate. love how it drives! hate all the work to access steering servo, speed controller etc. the trans internally near as bulletproof as a hornet axle too. they'd just done a "re-re" so all the components are available enough, part why I'm thinking that trans in particular (and it's skinny profile).
One common issue is the front end is under-dampened. I solved this by maxxing out on spring stiffness setting and using diff fluid. However, the main reason it’s under damped is because the shock crank arm is just too short. When you fully compress the suspension the shock is only compressed halfway. Are you aware of this and have you considered making front arms with longer crank arms?
I think I missed out on this in the summer time! Yeah, I ran my original Bigwig and all the a-arms cracked one after one. Got some Bigwig 2017 installed now (and a slower motor) so I hope I will be alright. But man these Hotshot family a-arms are hard brittle plastic! It’s insane to think that the same company made the Grasshopper/Hornet swing arms. Oh Well, if the new a-arms on my Bigwig and my re-release Boomerang crack too I’ll look into these. I think at least the rear a-arms are the same on all three models.
much like the Fox, kinda infamous for breaking their front suspension hangers! I noticed some of them have ball jointed threaded rod from outer upper suspension arm to 3" back on the chassis to back them up and transfer some force, would probably be a good idea to do the same for the Hotshot! needs a long threaded ball to replace a couple chassis screws. might want to whip up a set before taking to the track just cuz!
looking again at this video and 156, looks like the chassis screws might be 2-1/2" back (from rear of upper arm), can tell it'd take a re-do of the uppers to make a lug for a ball link, just outside and vertical of front torsion bar ball.
Any thoughts / plans on redesigning the HotShot steering system? There are many people online showing their steering mods to correct the poor travel and bump steer / tow out that occurs during suspension compression. I'm in the middle of building the Re release of this kit and feel that this is the major design flaw with it. I'm thinking that I will try to adapt a Tamiya steering system (Tamiya 54191 (OP1191) M05 Alum Racing Steering Set) which will require servo relocation and some chassis modification. Also, I have the MIP ball diffs on order! Thanks
I would say that they mounting points are for sure but nylon is harder than most ABS plastics and therefore more brittle...BUT...the plastic used on these cars was like glass so I would say that by the powers of deduction, they have to be more durable. As for a supershot, I have no clue as I do not own one. Sorry about that! There are so many subtle differences in this line that it is hard to keep up!
Hi. I know it's a long response delay. I just discovered this video. I believe there were minimal variations between supershot, hot shot and bigwig but, I believe the chassis on all 3 were the same. Worth giving a shot.
Old video but is your propeller shaft at an angle ? on my super hotshot the propeller shaft isn't centered, it sits at an angle but It runs fine. im trying to find out if this is normal as I can't get it any straighter.
The front arms will fit. The rear ones can be installed but they will interfere with the shocks. So you will need another rear shock installation and shocks (either Supershot or HotShot type on the rear) and corresponding HotShot/SuperShot rear uprights to fit to the rear arms. The reason is that SuperShot and HotShot rear arms are similar allowing shock mounts on the rear side of the suspension. The other cars (HotShot 2, Boomerang, Sabre, Bigwig) have rear arms that allow the shocks to be installed on the front side of the rear arms.
Actually the both stock hotshot and super hotshot shares the same front bottom arm. It has a small hole for the shock www.ebay.com/itm/NEW-TAMIYA-SUPERSHOT-Parts-F-R-Arms-Front-Rear-HOTSHOT-SUPER-TP12-/312014122427 1.bp.blogspot.com/-sNkzLDDamVA/U0yLRttRAhI/AAAAAAAAQP4/wXLjOf_REqY/s1600/IMG_0597.JPG
www.tamiya.com/english/rc/rcmanual/58517.pdf On page 8, holes for BB17 and BB18 Your video showing the stock part has that holes on both bottom front arm
AWESOME, thank you ! according to this database, the FRONT suspension arms should work also for both Hotshot & Boomerang chassis cars (tamiyabase.com/parts/3070-19005867). any chance the BOOMERANG rear suspension arms will be available soon as well ?
Cool design. As someone who designed the arms himself I can really appreciate the work you put into it. They are very similar to the original.
Yeah I try and make stuff look stock... and then dye it red...hmmmm.
I owned the original hotshot back in the 80s, I crashed that car at full speed and only broke the front bumper. We used to play crash up derby with about 8 cars, I hit a car head on and their car flew up in the air at least 2’ high with NO damage to my car or his, these car were built like tanks
Wow, amazing to hear.
Me neither we build ramps and would jump the rail road tracks, not a scratch!!!
I'm ready to watch it eat up some track 🏁
Me too!
With the arms and MIP diff you should be very competitive in a vintage class
I think so too. The stock shocks may need to go but man do I like that look.
That is indeed a nice buggy. It's an original Hotshot with SuperShot underbelly and an ESC! I have much run-time with these nice cars. The flaws, to my experience, is cracking of upper and lower rear arms, cracking of front uprights and slack in upper front arms due to wear on the upper gearbox mounts. Collisions may cause damage to suspension arms as well as to front gearbox in way of arm mounts but also possible cracking to the forward self tapping screw mount below the stabilizer base. I know CRP had supports for the upper front arms but such upgrades were not available here where I live so I have not tested them. Also, the 8 mm ball connectors suffer from wear. If there is wear and slack in the front suspension the twin shock solution works far better than the mono-shock does.
Thank you for the info. Yes, this car has a tremendous number of flaws. This particular one was given to me by a friend for the MIP ball diff design and build. This car is the one with the MIP prototype parts that was used for mock up and testing and as such, got some abuse. I am looking forward to driving it and agree that the mono shocks are awful but I must say that for me, they give the car the look that tells me it is a hotshot. The complexity in the rear is so ridiculous you need to love it!
🙂👍Nice! I have a old hop up part from CRP on my hotshot it is a piece that connects across the top gearbox in front and across with a hole on each side that the front a arm pins go through it strengthens the front supposedly may be a good part to make also.
Can i see?
Sure sent you 3 photos to your e-mail you sent me last time... check your spam folder it may go in it because my e-mail is funky.
Got it!
cool you probably can make it easy.
First off I love all your videos and your contributions to these old cars, I’m an ORV guy and your rear suspension is amazing, please do a front a-arm suspension for the ORV chassis, I made one out of PLA that is 5mm wider per side than stock and it helped a ton, more than happy to send what I have as a starting point, I really like your keep it Tamiya-ish design approach
Thank you so much! I will be doing a front end for the ORV for sure! Right now I have no idea what path ill be going down but it will change the whole front end.
awesome! I liked their cage frame idea a lot, it just wasn't all that well executed. Tamiya should re-visit to develop something newer and better instead of "let's do a re-re!". I can picture a Grasshopper/Fox RWD type hybrid, is pretty decent gearbox+IRS (also allows using 3-4 different size pinion gears, motor mounted low+behind), then go a F/E something more like a Blitzer. if they started messing around like that, taking notes from past mistakes (classic or not!), they could produce some really cool new units that'd maybe even compete. Alberto I forget which one it was you planted an Associated Stealth transmission into, but its exactly the kind of thinking Tamiya really needs to start doing! the ORV cage concept has the potential of being light and rigid, as well as giving pretty easy access to any-everything, what's not to like?
(ain't gonna list all the real problems of the ORV's, it's so long!)
this could be some decent $$ for someone good with 3D scanning, modifying, and 3D printing, selling them the designs and geometries for a price plus a percentage. flipping the geometry inside out for a CNC to carve plastic injection molds isn't rocket science to people having the machine skills. it's possible a lot of their existing molds could be modified fairly easily too (if they have 2-3 sets, alter one for "new").
my OLD Fox is love/hate. love how it drives! hate all the work to access steering servo, speed controller etc. the trans internally near as bulletproof as a hornet axle too. they'd just done a "re-re" so all the components are available enough, part why I'm thinking that trans in particular (and it's skinny profile).
One common issue is the front end is under-dampened. I solved this by maxxing out on spring stiffness setting and using diff fluid.
However, the main reason it’s under damped is because the shock crank arm is just too short. When you fully compress the suspension the shock is only compressed halfway. Are you aware of this and have you considered making front arms with longer crank arms?
It totally is. I did the same and it made it better. No there will be no more development on this car for the time being.
I think I missed out on this in the summer time! Yeah, I ran my original Bigwig and all the a-arms cracked one after one. Got some Bigwig 2017 installed now (and a slower motor) so I hope I will be alright. But man these Hotshot family a-arms are hard brittle plastic! It’s insane to think that the same company made the Grasshopper/Hornet swing arms. Oh Well, if the new a-arms on my Bigwig and my re-release Boomerang crack too I’ll look into these. I think at least the rear a-arms are the same on all three models.
After one run! That is awful! Tamiya seems to have two ABS grades, too soft and too hard.
much like the Fox, kinda infamous for breaking their front suspension hangers! I noticed some of them have ball jointed threaded rod from outer upper suspension arm to 3" back on the chassis to back them up and transfer some force, would probably be a good idea to do the same for the Hotshot! needs a long threaded ball to replace a couple chassis screws. might want to whip up a set before taking to the track just cuz!
Yeah may not be a bad idea.
looking again at this video and 156, looks like the chassis screws might be 2-1/2" back (from rear of upper arm), can tell it'd take a re-do of the uppers to make a lug for a ball link, just outside and vertical of front torsion bar ball.
Any thoughts / plans on redesigning the HotShot steering system? There are many people online showing their steering mods to correct the poor travel and bump steer / tow out that occurs during suspension compression. I'm in the middle of building the Re release of this kit and feel that this is the major design flaw with it.
I'm thinking that I will try to adapt a Tamiya steering system (Tamiya 54191 (OP1191) M05 Alum Racing Steering Set) which will require servo relocation and some chassis modification.
Also, I have the MIP ball diffs on order!
Thanks
It is a possibility. I have been enjoying the work on this car so as I get it more sorted I will have to do something with the steering.
Thanks for a great video and the A Arms. In your opinion, are they stronger than STD. Will they fit a super shot?
I would say that they mounting points are for sure but nylon is harder than most ABS plastics and therefore more brittle...BUT...the plastic used on these cars was like glass so I would say that by the powers of deduction, they have to be more durable. As for a supershot, I have no clue as I do not own one. Sorry about that! There are so many subtle differences in this line that it is hard to keep up!
Hi. I know it's a long response delay. I just discovered this video. I believe there were minimal variations between supershot, hot shot and bigwig but, I believe the chassis on all 3 were the same. Worth giving a shot.
Fantastic build my friend, great Job 👊😁👊
Thank you!
Excellent work
Thanks!
I wish can get new rear arm for my hotshot
Episode 156 covers the rear with links to the parts on shapeways.
Old video but is your propeller shaft at an angle ? on my super hotshot the propeller shaft isn't centered, it sits at an angle but It runs fine. im trying to find out if this is normal as I can't get it any straighter.
It is supposed to be at an angle. This is very common in cars with this vintage
Nice work mate👍👍
Thanks!
I meant the stock arms. There were a bunch of clone like cars back then. Monogram and bandai made variants. Not as good as the hotshot tho!
Not as good as the hotshot? That's scary.
First video of the day? why not make it an AMPro video?? :D
Haha! Good idea.
good job
Thank you!
Can I use these arms on a Tamiya boomerang
I don’t know. I have never used a boomerang before but have a feeling they are different
I swear that's the same arms that's on my MRC RoadWinner! Hmm...
Wow never seen that before.
Can you send me a full set of the hot shot Arm front and rear.
Sure man, you can get them from the links in the description here. They are all on shapeways.
Would you send it all, to Indonesia, Jakarta city. Just tell me how much the shipping cost, and the price for the arms.
Does it also fits the super sabre?
No idea. This is the only one of the HS family I have. Wish I knew more about them.
The front arms will fit. The rear ones can be installed but they will interfere with the shocks. So you will need another rear shock installation and shocks (either Supershot or HotShot type on the rear) and corresponding HotShot/SuperShot rear uprights to fit to the rear arms. The reason is that SuperShot and HotShot rear arms are similar allowing shock mounts on the rear side of the suspension. The other cars (HotShot 2, Boomerang, Sabre, Bigwig) have rear arms that allow the shocks to be installed on the front side of the rear arms.
Looks like it doesn't have the front shock mounting for Super hotshot.
Nope, just for the HS. I dont have a SHS to compare it to.
Actually the both stock hotshot and super hotshot shares the same front bottom arm. It has a small hole for the shock
www.ebay.com/itm/NEW-TAMIYA-SUPERSHOT-Parts-F-R-Arms-Front-Rear-HOTSHOT-SUPER-TP12-/312014122427
1.bp.blogspot.com/-sNkzLDDamVA/U0yLRttRAhI/AAAAAAAAQP4/wXLjOf_REqY/s1600/IMG_0597.JPG
Hmmmm, maybe the one I copied didnt? It was a vintage car. Ill take a look and see. I totally might have missed it.
www.tamiya.com/english/rc/rcmanual/58517.pdf
On page 8, holes for BB17 and BB18
Your video showing the stock part has that holes on both bottom front arm
So you can't get a full aluminium ser of shocks
Yeah you can but I like the red for this car. I also like the crap single front and rear setup. I think the design is so cool yet useless.
@@AMPROEngineering Agreed re single shock set up, iconic. Where can I get aluminium shock covers for the Hotshot?
Project Super Duper Fly
Oh we aren't going that crazy here! Haha!
In case the link isn't working. It shows how the front for dual dampers.
www.worthpoint.com/worthopedia/tamiya-hotshot-rc-channel-aluminum-1907122792
Wow that's awesome! I like that a lot
AWESOME, thank you !
according to this database, the FRONT suspension arms should work also for both Hotshot & Boomerang chassis cars (tamiyabase.com/parts/3070-19005867).
any chance the BOOMERANG rear suspension arms will be available soon as well ?
Well I do not have one so that I can design it. This is usually my main issue when designing these parts unfortunately.
I want aluminum arm...and gear box!!!
There are aluminum ones you can purchase.
AMPRO Engineering Where is URL?
I can’t find it. I want it.