Pumilio Design gear differential for TRF501/511 and DB01/DB01R
 

Just installed my gear diffs on my TRF501. The diffs are manufactured by Pumilio Design. I have not yet driven them, but they feel very smooth, hopefully they will perform too :woot: On the down-side, at least on my car (TRF501) the front upper deck needed some cutting for the diff to fit, but at least on my opinion, it is not that big of an issue.


Pic.

http://lh5.ggpht.com/_CbsnmK9PWPY/TE...milio_diff.JPG

The price is 120 eur for one diff, which equals to slightly more than a new ball diff made with ceramic bearings and balls.

How much were they Mof? and who do i speak to about ordering some?

Im liking the look of those, seriously would be interested in a set if you have more details :thumbsup:

looks good

I also want them where to buy:thumbsup:

Also interested in where to buy :)

Pm sent.

Made in Finland?

The casing is.

Internal gearing is from an Xray NT1. Outdrives are custom machined Tamiya TRF501 oneway outdrives and the pulley is also a custom machined Tamiya pulley.

some details on price and where to order them from would be nice.

look nice!

The website is a bit of a struggle and I can't see them on there at all ........... how do we order? :(

PM sent.

They feel even nicer :thumbsup:

Too bad I have not yet had the opportunity to test them on the track :cry: But I've heard good things on them from some other drivers.

The price is updated on the first post.

120 euro?

surely that is a mistype.

a set of gear diffs is going to cost 1.3 times more than a db01r?

No, it's not a mistype.

I am not the one who makes them, but there are a few factors to this. Firstly, the need to buy the gears, pulleys, oudrives etc for the diffs. Then a quite a bit of custom machining (outdrives and pulleys need custom machining), then there is the whole diff case that needs to be manufactured and so on. And the production rates are low, it is not a mass product.

If you go and buy all the necessary stuff to make a ball diff with ceramic bearings and balls and TRF501/511 outdrives, it will be quite expensive too (the prices are rounded values):

Outdrives, 23 eur
Ceramic balls, 10 eur
Ceramic thrust bearing, 10 eur
Ceramic bearings, 10 eur
Screw and nut, 10 eur
Pulley, 4 eur
Diff plates, 4 eur

The cost comes to around 70 eur for one. So yes, the gear diffs are more expensive. But they are also a different product compared to the mass produced parts that you use for the standard diffs.

And I think it is not right, or fair, to compare the price of an entry level model like the DB01R (which by the way costs around 300 eur in Finland with no tires, wing or body, so in reality around 370 eur with the necessary stuff... taxes, gotta love 'em...) in Hong Kong etc to something custom made, like these diffs.

PS. If you look at the price of mass produced carbon or alloy parts for TRF501/511, you also see a trend of not-as-cheap-as-db01r-would-have-been :) Rear front or rear lower bulkheads. 30 eur. Each (so 120 eur total for the car). 60 eur for the chassis (one piece of carbon fibre), oneway 45 eur, alloy hubs 40 eur / pair and so on, even the body is 45 eur. The diffs don't seem as pricey as if you compare them to the plastic parts of the db01 as if you compare them to the price of the parts for the TRF models...

What are the advantages over ball diffs?(i had to ask)

No maintenance whatsoever once the right oil is found. If its manufactured (and build) correctly...

I find it very hard that there is hardly any maintenance with gear diffs. Just ask any durango owner, even the spec r owners. Tell me a gear diff that doesnt leak!

Ran a couple of runs today with the diffs. I really, really, like them. :thumbsup: