Weight of your 2wd buggies

[simonrhart]

I was wondering what the weight was of your 2wd buggies. My finished DB2 weighs in at 1458grams so is actually underweight by 16grams. This is not great problem as I have a under shorty weight to balance the car (not installed) and a centre weight 60 grams or so but the car is so light! Not sure if this is a good or bad thing.

Quite contrast to the 22-4 weighing around 1800grams.

I found on the BRCA site, if competing in both 2wd and 4wd, the minimum weight for a 2wd buggy goes up from 1474 to 1588?? weird.

Simon

[Dandare]

BRCA Handbook

23. Construction Rules - General

23.4 "To be eligible to compete in the 4wd class, 2wd cars must race at 1588 grams minimum weight"

I presume this means if you want to enter your 2wd car into a 4wd race you'll need it to match the 4wd minimum weight limit of 1588 grams. (If you run a 4wd car in a 2wd race it'll already be over the 1474 grams minimum limit)

For reference, mine, complete with wheels, PT, battery etc weigh as follows:

TM2 v1 = 1593g
TC02C Evo = 1504g
BSR BZ 222 = 1640g

[racingdwarf]

Yer 22.4 is one heavy beast, one of the reasons a few have started to suffer thermal cutout on very hot summer race days on high grip.
Weight is a preference thing once you have got to the BRCA minimum were you put it and how much really depends, what one person likes another does not most go for under lipo,front bulkhead not to sure with yours as with a mid you run in a couple of places on the rear, but I have never run a forwards motor so can't help, trial and error and some advice from fellow DB racers looks to be the way

[jcb]

my 22 2.0 weighs 1590 grams ready to go.

Yes you can / could (see below) race a 2wd in 4wd class by weighing it up to 1588 grams. I guess back in the day of 1700mah nicd's a 2wd car had an advantage being 100 grams lighter, despite the lack of natural grip that a 2wd generates.


However I believe there was a rule proposal for 2015, that to race in 4wd a car has to be 4wd. The reason being that on certain high grip tracks a 2wd is actually quicker. I don't know if this rule got passed at the AGM and whether it was subject to club and regional variation.

[simonrhart]

It makes sense and yes I'm seeing the difference between 2wd and 4wd get smaller as car designs change and grip levels rise i.e. centre motor 2wd cars and astro/carpet.

I recently raced indoor on carpet and broke my 22-4, pivot brace snapped from hitting the rope of an apex of a corner - not that hard I have to say so it must have been weakened from a previous shunt, but it broke nonetheless. I then borrowed my friends Cougar SV2 - I think it was, and I found it very good around the track and actually was 2 laps faster than with my 22-4.

Admittedly, I was still trying to get the 22-4 to perform using mini-pins and on carpet both combinations my 22-4 had never seen before and the fact the Cougar was setup ready to go, but what a difference. I actually preferred driving the 2wd with the slippery bits to fight against.

2wd is fun if you have plenty of front end.

Simon

[simonrhart]

Yer 22.4 is one heavy beast, one of the reasons a few have started to suffer thermal cutout on very hot summer race days on high grip.
Weight is a preference thing once you have got to the BRCA minimum were you put it and how much really depends, what one person likes another does not most go for under lipo,front bulkhead not to sure with yours as with a mid you run in a couple of places on the rear, but I have never run a forwards motor so can't help, trial and error and some advice from fellow DB racers looks to be the way

I have heard some people struggling with heat issues on the 22-4 on hot days. The new cab forward body helps as there is a vent right in front of where the speedo is normally positioned. Just weighed mine and it's 1836 grams. which is almost 400 grams heavier than my DB2.

Yeah, it will be trial and error. Just drilled a couple holes and fitted a 60G spine weight to the chassis under the prop shaft - from my Lazer actually it fits just fine. Seems most people are doing this - not entirely sure why though! :confused: Will try the car with and without.

I have a lipo weight but applied unbalances the car. Can't wait to try it out.

Simon

[JustinWood]

Hi folks, my RC10B5M ready to go including shorty LiPo weighs 1575g. The 25 year old vintage Kyosho Ultima Pro weighs 1630g with 25 year old nicd 1700SCE (yes they still run!) or about 100g more for a more modern 5100 nimh set.

What's interesting is that excluding battery the vintage car is lighter by 65g, and that's carrying larger and heavier ESC, receiver and servo, so probably 150-200g lighter on a like for like basis! :thumbsup: Granted the RC10 goes twice as fast (sadly not in my hands!) but it's still a surprising result nonetheless. I don't remember any minimum weight restrictions in my former racing days, but then we had only just invented carbon fibre in those days! Cheers.