Tamiya Club Official Top 10 Fastest RC'ers List

[El Dougo]

2 hours ago, Macinnis said:

If you have any suggestions I would love to hear them

I think your tyres will be the main culprit as they tend to be at the limit around 60Mph and are probably ballooning like crazy.  You could look at taping them on the inside or ideally switch to foams, if they do fit you will be amazed with the difference.  

Go for very hard suspension at the back and very soft up front also run a good amount of toe-out up front with 0 to -1 camber and -1 camber in the back, it should help with the lifting a little and make it run a lot straighter.  I wouldn't give up on the wing just yet and would try experimenting with different ones, perhaps even add one to the front  

[Jonathon Gillham]

28 minutes ago, MadInventor said:

I was hoping that the extra weight of the brass would slow you down  

I've done a quick bit of maths:

My car:

22t pinion & 67T spur = 7.92:1 ratio, battery 3S &4000Kv motor = 44400rpm. Therefore axle rotation = 44400 / 7.92 = 5606 rpm

Your car:

(Assuming you're using 19T as largest for that spur)

19T pinion & 70T spur = 9.68:1, battery 2S & 5900Kv motor = 51,600rpm. Therefore axle rotation = 51600 / 9.68 = 5330 rpm

19T pinion & 70T spur = 9.68:1, battery 3S & 5900Kv motor = 65490rpm. Therefore axle rotation = 51600 / 9.68 = 6765 rpm

For my car 5605 at axle = 79kph, assuming the same wheel size for your car, 5330rpm at the wheels = 75kph, 6765rpm = 95kph.

So the big question is, are you using 2S or 3S ?????

If you go to the 22/67 gear combo:

2S = 6515 at the axles = 91.8kph

3S = 8268 at the axles = 116.51kph =72mph = change of underpants if you're not on a runway

 

 

@Jason1145 do the last one but follow @Wooders28 lead and strap another 2s on top for good measure, just because

[Wooders28]

7 minutes ago, Jonathon Gillham said:

just because

The best reason! 😁

[Jason1145]

49 minutes ago, MadInventor said:

I was hoping that the extra weight of the brass would slow you down  

I've done a quick bit of maths:

My car:

22t pinion & 67T spur = 7.92:1 ratio, battery 3S &4000Kv motor = 44400rpm. Therefore axle rotation = 44400 / 7.92 = 5606 rpm

Your car:

(Assuming you're using 19T as largest for that spur)

19T pinion & 70T spur = 9.68:1, battery 2S & 5900Kv motor = 51,600rpm. Therefore axle rotation = 51600 / 9.68 = 5330 rpm

19T pinion & 70T spur = 9.68:1, battery 3S & 5900Kv motor = 65490rpm. Therefore axle rotation = 51600 / 9.68 = 6765 rpm

For my car 5605 at axle = 79kph, assuming the same wheel size for your car, 5330rpm at the wheels = 75kph, 6765rpm = 95kph.

So the big question is, are you using 2S or 3S ?????

If you go to the 22/67 gear combo:

2S = 6515 at the axles = 91.8kph

3S = 8268 at the axles = 116.51kph =72mph = change of underpants if you're not on a runway

 

 

My motor is 6900kv not 5900kv, did you calculate with 6900kv but just mistyped 5900kv?

Or those calculations are all on the wrong 5900kv?

Im gonna try 2s first and then consider 3s.. unfortunately I don't have a bigger esc to run above 3s.... if I did the extra lipo would go on the front though

[Phil_H]

I currently have a broken TT01....FF01 & TA03 lol...but I have been doing some testing. 

I've fixed the TA03 tonight, I trashed the rear end on that last run where the wheel came off. Managed to find a cheap rolling chassis for spares. But it is a TA03R....So I have the option of now building a twin motor TA03. But I want to break 60mph with a single motor first, so will leave the rear end empty for the time being. Then will maybe go for a modified twin brushless monster. 

I locked the front Diff on the TT01 to try and make it more stable, it's done the opposite and messed up the steering, it just torque steers like crazy on more than 50% throttle, so will have to go back to just heavily greased diff. 77kph with not much control and part throttle looks promising for a decent top speed run though.

The FF01 is pretty much at its limit in its current set up, tried a bigger pinion, but not got enough power to use it. It was actually a few Kph slower. 

Anyway....might get a run with the TA03 this weekend. 

 

[Wooders28]

12 minutes ago, Jason1145 said:

if I did the extra lipo would go on the front though

🤔

 

[MadInventor]

15 minutes ago, Jason1145 said:

My motor is 6900kv not 5900kv, did you calculate with 6900kv but just mistyped 5900kv?

Or those calculations are all on the wrong 5900kv?

Im gonna try 2s first and then consider 3s.. unfortunately I don't have a bigger esc to run above 3s.... if I did the extra lipo would go on the front though

Yeah, I've bleeped up and used the wrong numbers, as well as got the first bit of maths wrong, here's the amendment:

19T pinion & 70T spur = 9.68:1, battery 2S & 6900Kv motor = 51,060rpm. Therefore axle rotation = 51060 / 9.68 = 5274 rpm

19T pinion & 70T spur = 9.68:1, battery 3S & 6900Kv motor = 76590rpm. Therefore axle rotation = 76590 / 9.68 = 7912 rpm

For my car 5605 at axle = 79kph, assuming the same wheel size for your car, 5274rpm at the wheels = 74.3kph, 7912rpm = 111.49kph.

So the big question is, are you using 2S or 3S ?????

If you go to the 22/67 gear combo:

2S = 6446 at the axles = 90.83kph

3S = 9670 at the axles = 136.2kph =85.16mph = change of underpants and socks if you're not on a runway

 

[Wooders28]

@Phil_H Tried the 2.5t in sensorless, cogged like mad (spluttered,Only 2s 25c lipo) then left like a scalded cat!

Esc roasting, wires too hot to touch!! 😯

[M 800STD]

@Phil_H

I'm not sure a twin brushless TA03 will be fast, but then again I'm usually wrong.  : )

[Jason1145]

7 hours ago, Phil_H said:

I currently have a broken TT01....FF01 & TA03 lol...but I have been doing some testing. 

I've fixed the TA03 tonight, I trashed the rear end on that last run where the wheel came off. Managed to find a cheap rolling chassis for spares. But it is a TA03R....So I have the option of now building a twin motor TA03. But I want to break 60mph with a single motor first, so will leave the rear end empty for the time being. Then will maybe go for a modified twin brushless monster. 

I locked the front Diff on the TT01 to try and make it more stable, it's done the opposite and messed up the steering, it just torque steers like crazy on more than 50% throttle, so will have to go back to just heavily greased diff. 77kph with not much control and part throttle looks promising for a decent top speed run though.

The FF01 is pretty much at its limit in its current set up, tried a bigger pinion, but not got enough power to use it. It was actually a few Kph slower. 

Anyway....might get a run with the TA03 this weekend. 

 

Sounds like you're hot at it Phil, you still haven't got a RWD entry yet?

If you haven't got a RWD you don't know you're born yet, remember the battles you had with your Blitzer Beetle!

Whats the motor in your FF01 that's not powerful enough?

 

[Jason1145]

7 hours ago, Wooders28 said:

🤔

 

My front consisted of a lexan wing angled downwards with the wheel weights stuck on, not only heavy but gave downforce from the angle created, thsts what I was thinking anyway, that one you're using there might create more drag with its blunt face?

[Phil_H]

8 hours ago, Wooders28 said:

@Phil_H Tried the 2.5t in sensorless, cogged like mad (spluttered,Only 2s 25c lipo) then left like a scalded cat!

Esc roasting, wires too hot to touch!! 😯

Still in its box. I'm not sure it'll be drivable! I keep thinking about going for it and getting a Castle Combo. We'll see!

5 hours ago, M 800STD said:

@Phil_H

I'm not sure a twin brushless TA03 will be fast, but then again I'm usually wrong.  : )

Using twin brushless 'Should' make it easier to get them to max power/rpm in a smaller space. More Torque etc... It won't make a huge difference in top speed. 

36 minutes ago, Jason1145 said:

Sounds like you're hot at it Phil, you still haven't got a RWD entry yet?

If you haven't got a RWD you don't know you're born yet, remember the battles you had with your Blitzer Beetle!

Whats the motor in your FF01 that's not powerful enough?

 

5300Kv with a 30t Pinion. Gearing is to high I think, so not getting to max speed. Maybe I just need a longer road  

As for a RWD entry, I'll be there at some point  

[Phil_H]

This one....

 

https://www.modelsport.co.uk/castle-sv3-sidewinder-waterproof-1-10th-sport-car-esc-1406-7700kv/rc-car-products/379696

[Wooders28]

1 hour ago, Phil_H said:

This one....

 

https://www.modelsport.co.uk/castle-sv3-sidewinder-waterproof-1-10th-sport-car-esc-1406-7700kv/rc-car-products/379696

I've one of those too, got it for the procat, just not tried it yet! 

It won't be powerful enough for the 2.5t, it will just about cope with the hotter castle motors on 2S, I'm running the mamba max pro with the 2.5t, but thinking the 5700kv on 5s is more fun 🙄😁

[Wooders28]

1 hour ago, Jason1145 said:

that one you're using there might create more drag with its blunt face?

That was mk1 , its been lightened since then, but need the edge to secure the lipo to.

[Phil_H]

I'll not attempt the 2.5 with that. 

Not sure I'll find an ESC that's affordable to run it.

may just use the Castle combo. 7kv+ On a decent 2s may give decent results 

[M 800STD]

@Phil_H

What about the Mamba XL X, proven speed challenge ESC and a great price?

The only issue you may have is size.

[Jason1145]

13 hours ago, MadInventor said:

Yeah, I've bleeped up and used the wrong numbers, as well as got the first bit of maths wrong, here's the amendment:

19T pinion & 70T spur = 9.68:1, battery 2S & 6900Kv motor = 51,060rpm. Therefore axle rotation = 51060 / 9.68 = 5274 rpm

19T pinion & 70T spur = 9.68:1, battery 3S & 6900Kv motor = 76590rpm. Therefore axle rotation = 76590 / 9.68 = 7912 rpm

For my car 5605 at axle = 79kph, assuming the same wheel size for your car, 5274rpm at the wheels = 74.3kph, 7912rpm = 111.49kph.

So the big question is, are you using 2S or 3S ?????

If you go to the 22/67 gear combo:

2S = 6446 at the axles = 90.83kph

3S = 9670 at the axles = 136.2kph =85.16mph = change of underpants and socks if you're not on a runway

 

Thanks for this correction MI, I took the DF02 for a lunch time test and the 27Mhz radio range seems fine so I'll leave it.

The 6900kv on 2s stutterers for 1 second and then pulls away nicely... I managed to hold full throttle and it didn't lift so it looks like a go for a video run on the weekend. 

Lets see if I'm any good at gauging the speed by eye sight... looked about 40MPH (64KPH) - I'll come back with the actual speed once recorded.

(MI - I don't think it's hitting the predecticted 90.83KPH but maybe my judgement is off too) 

[MadInventor]

2 hours ago, Jason1145 said:

Thanks for this correction MI, I took the DF02 for a lunch time test and the 27Mhz radio range seems fine so I'll leave it.

The 6900kv on 2s stutterers for 1 second and then pulls away nicely... I managed to hold full throttle and it didn't lift so it looks like a go for a video run on the weekend. 

Lets see if I'm any good at gauging the speed by eye sight... looked about 40MPH (64KPH) - I'll come back with the actual speed once recorded.

(MI - I don't think it's hitting the predecticted 90.83KPH but maybe my judgement is off too) 

The 90.83 was predicted for using the high speed 67T spur and a 22T pinion. On 2S with your installed ratio, it would be around 78/79, assuming your tires are the same diameter as mine. I was using high lift tires, which are around 95mm diameter

[Phil_H]

10 hours ago, Jason1145 said:

Sounds like you're hot at it Phil, you still haven't got a RWD entry yet?

If you haven't got a RWD you don't know you're born yet, remember the battles you had with your Blitzer Beetle!

 

 

SRB is my RWD entry  

I'd completely forgot about that one. Although that was just unpredictable on a different level.

I'm thinking an M Chassis of some sort for a decent run at it.

[Wooders28]

6 hours ago, M 800STD said:

@Phil_H

What about the Mamba XL X, proven speed challenge ESC and a great price?

The only issue you may have is size.

The XL and even the X are knocking on the £200 door new, never seen any 2nd hand, only seen 2 mamba max pro's for sale and I bought one of them. 

[M 800STD]

I have no experience with the Castle items but some speed challenge guys rate the XL X over the latter.

The XL X is the only reasonably priced ESC capable of pushing 1/10 cars to 160mph on 4s, proven, and £200 to your door is not that bad.

There is Fliers, which are nice and cheap, but a bit big.  Not seen them in high speed cars, but have seen them in powerboats with great success.

Then there's MGM, which is just expensive.

Schultz, high end, also had high amp ESC, but also big and expensive and I don't think they are trading.  Also proven in high speed powerboats with great success.

Another manufacturer that worth a look at is Atos.

[Wooders28]

5 minutes ago, M 800STD said:

The XL X is the only reasonably priced ESC capable of pushing 1/10 cars to 160mph on 4s, proven, and £200 to your door is not that bad.

We are going to start needing these types of esc to have a shout at being in the top 10 before too long! 😯💰💰

 

[jupitertwo]

5 minutes ago, Wooders28 said:

We are going to start needing these types of esc to have a shout at being in the top 10 before too long! 😯💰💰

 

Ha, quite! It's all moved on so much since my last runs, I've not found anywhere I could safely go much faster. I'd love to find somewhere to try out a pan car 

[M 800STD]

According to Castle Tech, the XL X was based on a 160a controller.

To get a speed challenge car, you will need suspension and the top runners are 4wd.  Pan cars are typically slower, losing traction.