TA05 Gear Diff in TRF511

[CraigM]

Does anyone know if this will work? I know the 416 diffs are way to wide but the TA05 one looks much narrower and doesn't look to take driveshaft blades



http://www.spec-r.com/specrr2/module...roducts_id=109

[mattybucks]

I'm not sure.

I just have two spare diff's and swap them over as and when I need to.

[Fabs]

They do fit even though they're a bit narrower than the 511 diffs. They take blades however, but there's a guy here who's supposed to explain how he used ZX5 RTR wheel axles to make outdrives that wouldn't take blades. Still waiting on that though...

[Marc0]

Any news on this ?

[msxmre]

One of the guys i was racing with last week had these in his TRF511. I don't know what difference they made but he was really happy with it and his car looked good out on the track. Just need to see if there'll ever be a version for the TRF502. His name's Donutt and he's in the tamiya forums a lot.
Hope this helps
Scotty....

[qatmix]

The spec r did has been out for some time for the 501/511. The new ta05v2 gear diff from tamiya should also fit assuming it's the same. I am stripping my 501x down this week so will check the STD ta05 dif fits.

[Donutt]

lol Thanks Scotty! I wasn't quite ready to open Pandora's box yet...

Too early/too little testing, but I'll post once I've got something concrete.
I've fitted it with shims to take up slack, 1000wt oil and standard 3mm blades.

[Marc0]

Originally Posted by Donutt

lol Thanks Scotty! I wasn't quite ready to open Pandora's box yet...

Too early/too little testing, but I'll post once I've got something concrete.
I've fitted it with shims to take up slack, 1000wt oil and standard 3mm blades.

Sorry for this but since I put a diff gear in my Losi 22, I am really happy to not have to rebuild my ball diff after each afternoon... (my favorite track has a lot of grip, and diff is very sollicitated)

If I understand well, I just need to order a TA05 Spec-R gear diff, and blades to put on my driveshaft (do you have a reference to recommend?)

[Donutt]

XR305240 Xray 3mm blades (for the older XRay T2, up to '007) should fit.

I actually used the 3.5mm ones from a T2'008 and sanded them down slowly so the pin hole remained in the centre - long job, but I'm cheap(!) and had them spare in the pit box.

I'm testing again this week in wet, and early next week in dry (hopefully), so will be able to dial-in a couple of setups. Will post when I get that done.

I'm also udpating our LapAnalysis system for the remaining Scottish Off-road rounds tonight, so you'll be able to compare my laptimes from rounds 1, 2 & 4, with Scotty's from all 4 rounds so far, and see the changes - I ran the ball diff in the 511 at rounds 1 & 2, missed 3 and ran the gear diff in round 4. Scotty has run the 502 at all rounds but TBF has been running the car a year less than me.

Results are at : www.sorcinfo.org/results
LapAnalysis will be at : www.lapanalysis.n-esystems.com
and there'll be a 2011 section for the Scottish Off-road there this evening (late on - give me time!)

[Fabs]

On our high grip tight technical track, the blades didn't last more than 3 laps.

[_valtsu_]

Here is small review how I fitted gear diffs to Trf 511:
http://www.oople.com/forums/showthread.php?t=73557

Sorry for the delay Fabs.

[qatmix]

Originally Posted by Fabs

On our high grip tight technical track, the blades didn't last more than 3 laps.

Do you use the Tamiya blades? On my TC running Fast motors on high grip they last a couple of months.

[Donutt]

On our high grip tight technical track, the blades didn't last more than 3 laps.

Thanks for the info - I'll check the wear tomorrow and update this thread.

On my TC running Fast motors on high grip they last a couple of months

I'm with Fab on this one - wear in the 4WD off-road might be more than a TC.

I'm also udpating our LapAnalysis system for the remaining Scottish Off-road rounds tonight

Err?!? I guess I've run out of time tonight - will try and do it tomorrow...

[Fabs]

High grip Off Road is at least 5x tougher than anything on road, simply because of jumps and rough terrain. Like I said, 3 laps and the blades were no more.

[msxmre]

Yep Dom, you've had the 511 a year longer than me with the 502. Your car's looked good at all rounds you've attended.I didn't know in the A Final 4WD overall at NORA i finished ahead of you, honestly thought i was behind you.502 going great for me so still not tempted to swap my TRF502X for TRF511 but gotta honestly say yours goes really well and handles the track really good.
Scotty

[Donutt]

Poor first run and mediocre 2nd run in the 2 finals.

Down to a mechanical issue, that I'm not prepared to admit to on a public forum.
I'll tell you all about it next time I see you.
Only found out on the clean down on Monday.

Cars are still not ready for practice this week; will do my best to get out for a practice run on Friday at NORA.

[qatmix]

Originally Posted by Fabs

High grip Off Road is at least 5x tougher than anything on road, simply because of jumps and rough terrain. Like I said, 3 laps and the blades were no more.

Well as I can race for 15 meets (minimum before i change them) thats 75 races at 5 mins each.. so thats 375 mins.

You said 3 laps, so if the average lap time is 20 seconds thats one minute for off road

so we can deduce that Off road is 375 times tougher than on road!!!



Seriously, did you use the Tamiya ones? the 3 racing ones don't seem as durable

[Donutt]

so we can deduce that Off road is 375 times tougher than on road!!!

it appears we may just assume that!

6 races last Sunday, and I've just managed to have a look at the blades.
I say "blades" - I mean "blade".

The one that was left, was hanging on just, cracked and shattered.
The other, must still be at the track.

I think I'm going to have to investigate new outdrives for the gear diff...

Reason: I reckon the off-road cars wear out the blades, probably cause they have more torque applied through higher grip tyres, and much further suspension travel plus the increased forces applied. That must equal 375 at least!!!

Summary: unless you've got unlimited supplies of driveshaft blades, stay clear from this for now...

[Matt Butcher]

Originally Posted by Fabs

High grip Off Road is at least 5x tougher than anything on road, simply because of jumps and rough terrain. Like I said, 3 laps and the blades were no more.

If that is the case you will probably start eating gears in the spec r diffs, in mod tc the gears wear fairly quickly

[moggers]

I know people have there own opinions with geared diffs, but I ran the TA05 Spec-R geared diffs in the front and rear of my 511 today attending the TORCH Club Summer Series championship and I was very impressed with the results.

The track itself is a large, very high grip and bumpy astro turf layout.

The diffs drop straight into the 511 with a 0.2mm shim to take up the slop on the outdrive bearings. I used the HPI shims from the TC.

3000wt in the rear diff and 15000wt in the front. No leaks or issues with diffs all day. Completed practice, 4x heats and 3x finals without fault.
Used Tamiya TC driveshaft blades (3mm). Good news, I had no wear on the front blades all day, with the rears taking a little more wear. I think this is due to a lot more movement of the rear suspension, hence movement for the blades to cope with. They lasted 2-3 runs before I chose to replace them before breaking or completely wearing out.

Car seemed to accelerate harder through the corners, especially under power. Drive was much quicker.

Considering the high grip and bumpy track, diffs performed without fault and consistent performance throughout day. Very happy and will now start to experiment with diff oil wt's to enhance performance.

This is only my experience with the diffs, but impressed so far !