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Old 03-18-2008, 10:07 PM
  #871  
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Default Final Drive Ratio's

The HPI 0.6m pinions came in the mail today. I put a shim in the 52T spur (rather than tape so that I can change spurs quickly) and ran the pinions up to 31T; they mess fine and run fast, very fast!

I've now tested every combination from the 19T pinion 61T spur (FDR 8.35) to the 31T pinion 52T spur (FDR 4.36). I have every pinion from 19-31T and the 61, 58, 55, and 52T spur.

Now that all the combo's have been tested I'm attaching the updated table.
Attached Thumbnails TT-01 Forum-pinions.jpg  
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Old 03-19-2008, 03:24 PM
  #872  
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RaceBucks, you did a great research job there. I am considering getting the HPI gears too, so that I have a bit more flexibility in my gear selection. I currently run the HPI spur gear adapter with a 65T spur and 40T pinion which gives an FDR of 4.23. Whilst this is fast on the straights, it is slower in the corners (with 540 silver can). Ideally I'd like a range between 4.8 and 4.2.
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Old 03-25-2008, 02:53 AM
  #873  
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Hi I'm looking for some help on a few issues on my TT01 -

1. Do I need the adjustable upper arms front and rear to fit the tamiya stabilisers ? I currently have the alloy upper arms but looking at images of the stabilisers fitted on this thread it appears the adjustables are the way to go.

2. What is a good all round gear ratio for a 27t motor. Not looking for great topend and the tracks I run are generally quite mixed with a tight in field and only one reasonable straight. I'm currently running a 60t delrin spur with a 23t pinion.

3. I am having issues with the spur and pinions getting damaged during racing. Usually after a spin / shunt the spur keeps getting stones etc locking it up and damaging the pinion. I am baffled as to how these are entering the sealed drivetrain as I check the cleanliness of the car prior / post assembly.
My only guess is that during a shunt / spin the chassis is flexing and the spur and pinion are briefly seperating and causing damage to gears.
I've tried using a closer mesh by dropping down a mounting hole ( alloy motor mount ) I've tried after market pinions, delrin spurs, but still not found a resolve.
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Old 03-25-2008, 03:15 AM
  #874  
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Originally Posted by RaceBucks
The HPI 0.6m pinions came in the mail today. I put a shim in the 52T spur (rather than tape so that I can change spurs quickly) and ran the pinions up to 31T; they mess fine and run fast, very fast!

I've now tested every combination from the 19T pinion 61T spur (FDR 8.35) to the 31T pinion 52T spur (FDR 4.36). I have every pinion from 19-31T and the 61, 58, 55, and 52T spur.

Now that all the combo's have been tested I'm attaching the updated table.
Wow.....

Do you have pictures of 52T spur gear ?
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Old 03-25-2008, 04:34 PM
  #875  
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Originally Posted by Martinst
Hi I'm looking for some help on a few issues on my TT01 -

1. Do I need the adjustable upper arms front and rear to fit the tamiya stabilisers ? I currently have the alloy upper arms but looking at images of the stabilisers fitted on this thread it appears the adjustables are the way to go.

2. What is a good all round gear ratio for a 27t motor. Not looking for great topend and the tracks I run are generally quite mixed with a tight in field and only one reasonable straight. I'm currently running a 60t delrin spur with a 23t pinion.

3. I am having issues with the spur and pinions getting damaged during racing. Usually after a spin / shunt the spur keeps getting stones etc locking it up and damaging the pinion. I am baffled as to how these are entering the sealed drivetrain as I check the cleanliness of the car prior / post assembly.
My only guess is that during a shunt / spin the chassis is flexing and the spur and pinion are briefly seperating and causing damage to gears.
I've tried using a closer mesh by dropping down a mounting hole ( alloy motor mount ) I've tried after market pinions, delrin spurs, but still not found a resolve.
1. If the alloy arms have holes in them to fit a bracket, then you should use the bracket. The adjustable plastic arms have a bracket built in.

2. Have a look at the chart that RaceBucks published a few posts earlier. If you go for a lower final drive ratio (FDR) then you will get better top speed and will do well in the straights. With a lower FDR you will brake & accellerate better in the corners, but have lower top speed. So it depends on your driving style and the competition (if you're racing). I run 4.83 during qualifying as I can go around the corners faster without any one there and 4.23 during racing when I can hog the inside corners and go fast on the straights.

3. The drive train cover on the bath tub chassis does not not separate so much to allow stones getting in as I am sure you tightened the screws adequately. I think that when you are running 60 x 23 the mounting holes may not give you the correct clearance. Refer to RaceBucks chart. Try 58 x 23.
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Old 03-25-2008, 04:40 PM
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Originally Posted by asw7576
Wow.....

Do you have pictures of 52T spur gear ?
Have a look at post 805
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Old 03-28-2008, 09:31 AM
  #877  
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Default my 1st meeting with my new TT01

Here is a brief summary of my first meeting with my new TT01, my first electric meeting since 1987 !!

The car is fully ball raced, has an alloy motor mount, alloy steering and drive shaft, and a touring car body. First of all, the silver can motor was way too slow with the standard gearing. I found the car to lack turn in on what is a very tight narrow track. I started with full tyre treatment all round, and by the time I got to the final, I had none on the back tyres, just the front. This made the car quite stable, but still not "planted" if you know what I mean. I started with Kyosho 37 shore foams all round, but changed to 42 shore on the back.

Going forward I need :-

1.) better gear ratio to give more punch out of the corners. Can anyone recommend a suitable gear ratio ?

2.) softer front springs. Does anyone know the part number I need ?

By the way..... I won my final !! hip hip horray !!!! - mainly by driving cleanly and keeping away from the carnage around me !!

Any advice is most welcome.

Thanks,

32819toon
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Old 03-28-2008, 12:05 PM
  #878  
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Default Tamiya springs

Which spring sets are best for the TT01, 53163, or 53333 short set ?
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Old 03-28-2008, 12:21 PM
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Originally Posted by 32819toon
Which spring sets are best for the TT01, 53163, or 53333 short set ?
If you have the Super Mini CVA Shocks I'd go with the short shock set. I use this set on my Mini Cooper and they are fine, when I tried them on the stock TT-01 they were too short.

Strange comment about being too slow with standard gearing AND looking for more puch out of the corners; gotta pick which you want. On the gear ratios, if you are running Brushed 27 turn or so then start with gear ratio's around 7 and adj for track conditions, if you are still using the silver can try 5 or less; see the chart in post #871 in this thread.
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Old 03-28-2008, 12:25 PM
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Thanks for the reply RaceBucks
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Old 03-29-2008, 05:06 AM
  #881  
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More videos and pictures of my basher.... Just to share.

Man..real fast this time! Power. Can do power skids as if its on ABS drifting on asphalt using radials.

Still sounding like plane..or rocket. lol.

Vid 1
http://www.youtube.com/watch?v=cEWF2dAJuVw

This is what happened after the 1st run. good thing i brought spares. Check out the thick fat wires to handle the current.





11 cells test (After the tires got ripped up...on the heavier side...)


12 cells test


And after a couple of packs, the screws on holding the motor came loose. I noticed that using the MM causes screws to get real loose by themselves..must use thread lock...oh well.

Car went so fast it was drifting to a side...then it happened, the big flip, skid for almost 20m on its top and this is how it looks after... but still..nothing broke! cool.



Still looks sweet.
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Old 03-29-2008, 08:08 AM
  #882  
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Wow, that is fast!

I am driving a 6900 at 6 cells, and I am still getting used to the speed at 20:61.

Okay. So I only clipped a wall. This is what happened.







So basically, the left side knuckles shattered, with the rear knuckle broken in 3 places, and the front stub that connects to the lower arm broke. The dogbone snapped and a tire rod broke as well.

Right now I have it as RWD, and I luckily had extra knuckles to replace them, and an old tire rod that I popped on. Only, the handling is very bad--it just wants to spin out.

Do you guys think it is worth it to get alloy knuckles? And how are the GPM tire rods?
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Old 03-29-2008, 10:04 AM
  #883  
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Default TT01 off road

post deleted..

wrong thread sorry..
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Old 03-29-2008, 10:25 AM
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I forgot to ask does anyone have an extra dogbone and diff gear that turns the dogbone?

I would be extremely obliged if someone did... obviously I would pay for it and shipping.
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Old 03-29-2008, 10:13 PM
  #885  
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wow, quite a lot of damage! the steel knuckles should work well. i have a kit that has the mods but have not tried the MM5700 on it..yet.

think you can order the parts off RCmart. Or tower hobbies? i prefer the stock plastic parts though, as they can take some flexing and abuse and not really crack or break and cause damage to the motor, etc.

Originally Posted by Mooshu Beef
Wow, that is fast!

I am driving a 6900 at 6 cells, and I am still getting used to the speed at 20:61.

Okay. So I only clipped a wall. This is what happened.







So basically, the left side knuckles shattered, with the rear knuckle broken in 3 places, and the front stub that connects to the lower arm broke. The dogbone snapped and a tire rod broke as well.

Right now I have it as RWD, and I luckily had extra knuckles to replace them, and an old tire rod that I popped on. Only, the handling is very bad--it just wants to spin out.

Do you guys think it is worth it to get alloy knuckles? And how are the GPM tire rods?
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