cementsurfer86

Looking for one myself. I think I saw a mid-May ETA somewhere?

quantum

I don't see a rule about battery stays/holders. When using a shorty pack in M-chassis are there rules around what can be used?

Raman

iTrader: (94)

You can run a shorty pack and tape it in.

quantum

Hmm, thanks - what about 3D printed battery stays?

Raman

iTrader: (94)

Nope. Not original Tamiya part

gigaplex

iTrader: (2)

Seems a bit odd you're allowed to use tape or foam but not plastic.

DirkW

iTrader: (1)

Tamiya rules are especially peculiar about this, while they still usually vary greatly between countries. And non-Tamiya parts seems one of the major on-going themes that are more or less consistent nevertheless.

gigaplex

iTrader: (2)

I'm surprised they don't require Tamiya brand tape or foam.

Raman

iTrader: (94)

Tape, adhesive, foam, oil, grease, glue are generic expendable items.

battery tape has been used for years, dates back to NiCd/ NiMh. TRF415, 416, 417 didn’t have battery retainers so tape was used. So tape is legal.

3D printing a part to substitute a battery holder to fit a shorty pack, is creating / designing a specific aftermarket part for the M07 / M08

Raman

iTrader: (94)

You may want to consider minimum weight before you go with a shorty. My M08 was severely underweight with a a shorty, so I ended up running standard. Even then, I still needed to add 50g to make weight.

M07 is a bit heavier.

cementsurfer86

Same. I added 50g and actually a touch more to bring it a few grams over. The extra weight doesn't hurt the rwd cars.

With the M08, I wanted the side-to-side weight distribution that a full size pack provides.

quantum

If thats the rule, fine. But am I the only one who finds that odd? because the battery stay is not performance enhancing, it just holds the pack in. If there were a tamiya part that was designed for that purpose then we'd just use that. Generic screws and turnbuckles are allowed. In fact you could argue that lightweight, titanium, hardware has more of an impact on performance than a piece of plastic that simply avoids (and is heavier than) tape!
So is that the official rule from FMW? or is that our collective, educated assumption?

quantum

I'm experimenting with shorties on the basis that mass centralization is "good". I've added weight to bring it up to par and... so far so good. Had to chase setup a bit, but rotates well. You have to plug in your batt before sliding it in, so that is a bit of a pain.

quantum

Does anyone know if the TRF420 C-hubs are a direct fit for older models TRF417, 418 suspension? TIA

Dan

iTrader: (76)

No unless you ream out the hinge pin hole from 2.6 to 3mm which I don't think is allowed in TCS rules but is physically possible.